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EP3807869B1 - Procédé de fonctionnement d'un système d'annulation de commande de moteur - Google Patents

Procédé de fonctionnement d'un système d'annulation de commande de moteur Download PDF

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Publication number
EP3807869B1
EP3807869B1 EP18734148.2A EP18734148A EP3807869B1 EP 3807869 B1 EP3807869 B1 EP 3807869B1 EP 18734148 A EP18734148 A EP 18734148A EP 3807869 B1 EP3807869 B1 EP 3807869B1
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EP
European Patent Office
Prior art keywords
eoc system
spectral components
eoc
signals
operating parameter
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EP18734148.2A
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German (de)
English (en)
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EP3807869A1 (fr
Inventor
Denis Perechnev
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Ask Industries GmbH
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Ask Industries GmbH
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
    • G10K11/17823—Reference signals, e.g. ambient acoustic environment
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17879—General system configurations using both a reference signal and an error signal
    • G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/10—Applications
    • G10K2210/128—Vehicles
    • G10K2210/1282—Automobiles
    • G10K2210/12822—Exhaust pipes or mufflers

Definitions

  • the invention relates to a method for operating an engine order cancellation system which, based on operating parameters of the EOS system, is set up to generate compensation signals serving to compensate for acoustic interference signals resulting from the operation of a motor vehicle drive unit.
  • EOC systems for short, which on the basis of system-side operating parameters to generate compensation from the operation of a motor vehicle-side drive unit, d. H. e.g. B. an internal combustion engine, resulting acoustic interference signals serving compensation signals are known from the prior art in principle. Equally, methods for operating corresponding EOC systems from the prior art are basically known. The objective of such methods is the most complete possible suppression of acoustic interference signals that result from the operation of a motor vehicle drive unit and are introduced into a passenger compartment of the motor vehicle.
  • U.S. 5,170,433A discloses an active vibration system for reducing vibration.
  • EP 0 724 762 B1 discloses a control system for changing the frequency spectrum of an acoustic jamming signal.
  • WO 2017/157596 A1 discloses a control device for compensating for acoustic interference signals.
  • the invention is based on the object of specifying an improved method for operating an EOC system, in particular with regard to the most stable or robust operation of an EOC system.
  • the method described herein serves to operate an EOC system, which is based on system-side operating parameters, i. H. on the basis of operating parameters - as will be seen below, corresponding operating parameters are a forgetting factor ⁇ or a step size ⁇ (adaptation step size) of the EOC system - for generating the compensation of acoustic interference signals resulting from the operation of a motor vehicle-side drive unit - these include, in particular, acoustic interference signals such as e.g. B. speed-dependent vibrations of certain harmonic order to understand - serving compensation signals is set up.
  • acoustic interference signals such as e.g. B. speed-dependent vibrations of certain harmonic order to understand - serving compensation signals is set up.
  • the EOC system that can be operated or operated according to the method is typically installed in a motor vehicle in which it is used to compensate for H. e.g. B. an internal combustion engine, resulting acoustic noise signals is used.
  • the operation of an EOC system basically includes the detection of corresponding acoustic interference signals by means of a suitable acoustic sensor device or this associated acoustic sensor elements - this can be z.
  • B. act around microphones - the EOC system, the generation of artificial compensation signals based on the detected acoustic interference signals and outputs the compensation signals generated by means of a suitable acoustic output device or this associated acoustic output elements - this can be z.
  • the compensation signals cause, in particular due to a phase opposite to the phase of the respective acoustic interference signals, an optionally complete suppression of the acoustic interference signals, so that the acoustic interference signals are acoustically imperceptible or hardly perceptible to vehicle occupants.
  • a first step of the method all audio output devices comprising at least one audio output element, ie e.g. a loudspeaker, are detected in an interior of a motor vehicle equipped with the EOC system, ie in particular in a passenger compartment of a motor vehicle equipped with the EOC system audio signals to be output.
  • Corresponding audio signals are, for example, music and/or speech signals.
  • Corresponding audio signals are typically not compensation signals that can be generated or are generated by the EOC system.
  • all audio output devices on the motor vehicle side this can be z.
  • an entertainment and / or multimedia device for outputting entertainment and / or multimedia content in the interior, ie in particular in the passenger compartment, act of the motor vehicle - or one or more of the audio output device associated audio output elements detected.
  • the audio signals can be detected via a detection device implemented in hardware and/or software.
  • the detection device can form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • the audio signals to be output into the interior or into the passenger compartment of the motor vehicle are typically detected before the actual output of the audio signals into the interior of the motor vehicle.
  • the audio signals to be output into the interior of the motor vehicle are detected in particular before the audio signals are detected by the acoustic sensor device of the EOC system or an acoustic sensor element associated with it.
  • a sum signal describing all recorded audio signals is generated.
  • all recorded audio signals are then summed - the summation can e.g. B. done by an arithmetic summation - and described in a sum signal.
  • the summation signal can thus be generated by (arithmetically) summing up all of the recorded audio signals.
  • the sum signal therefore contains all recorded audio signals or their sum.
  • the sum signal also contains all possible harmonic and non-harmonic components of the audio signals to be output into the interior of the motor vehicle as well as all associated audio signal output parameters, i. H. e.g. B.
  • the summation of the audio signals and the generation of a corresponding sum signal can be done via a summing device implemented in hardware and/or software.
  • the summing device can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • those spectral components of the sum signal are extracted whose frequencies correspond to the frequencies of the acoustic interference signals to be compensated or compensated by the EOC system.
  • the sum signal is processed in such a way that those spectral components of the sum signal whose frequencies correspond to the frequencies of the acoustic interference signals to be compensated or compensated by the EOC system are extracted from the sum signal.
  • the frequencies of the extracted spectral components of the sum signal and the frequencies of the acoustic interference signals to be compensated or compensated for by the EOC system are therefore typically the same frequencies.
  • the frequencies of the acoustic interference signals to be compensated or compensated for by the EOC system are typically known for each EOC system, so that in the third step a comparison of the frequencies of the extracted spectral components of the sum signal with the known frequencies of the signals generated by the EOC -System to be compensated or compensated for acoustic interference signals.
  • the extraction of the spectral components of the sum signal, the frequencies of which correspond to the frequencies of the acoustic interference signals to be compensated or compensated for by the EOC system can take place via an extraction device implemented in hardware and/or software.
  • the extraction device can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • the third step i. H. before extracting the spectral components, if necessary, are or have been pre-filtered, d. H. one by means of a pre-filtering device - this can be z. B. be a low-pass filter device - are or have been subjected to pre-filtering carried out. If necessary, the pre-filtering can simplify or improve the extraction of the spectral components.
  • the extracted spectral components are modified to generate modified spectral components.
  • the spectral components extracted in the third step ie the spectral components of the sum signal whose frequencies correspond to the frequencies of the acoustic interference signals to be compensated or compensated by the EOC system, are then specifically modified or changed.
  • the modification can take place via a modification device implemented in hardware and/or software.
  • the modification device can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • the modified spectral components are converted into at least one operating parameter of the EOC system.
  • the modified spectral components generated in the fourth step are converted into an operating parameter of the EOC system by suitable data or signal processing.
  • the operating parameter of the EOC system can typically be influenced or influenced or described or described by the spectral components, so that a conversion is possible.
  • the operating parameter of the EOC system is also typically describable numerically.
  • the operating parameter of the EOC system is the forgetting factor ⁇ or the step size ⁇ . This applies in particular to an EOC system operated on the principle of an LMS algorithm (least mean square algorithm).
  • the conversion can take place via a conversion device implemented in hardware and/or software.
  • the conversion device can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • the operating parameter of the EOC system obtained by converting the modified spectral components is compared with at least one comparison operating parameter or reference operating parameter.
  • the subsequent selection of an operating parameter of the EOC system is compared with at least one comparison operating parameter, in preparation for the later selection of an operating parameter of the EOC system.
  • the operating parameter of the EOC system obtained in the fifth step is the forgetting factor ⁇ or the increment ⁇ .
  • the comparison parameter can therefore be e.g. B. be a comparison forgetting factor ⁇ 'or a comparison increment ⁇ '.
  • the comparison operating parameter can typically be influenced or influenced or described or described by the spectral components.
  • the comparison operating parameter can also typically be described numerically, so that in the sixth step of the method a (simple) numerical comparison of operating parameters with comparison operating parameters can be carried out.
  • the comparison can take place via a comparison device implemented in hardware and/or software.
  • the comparison facility can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • a seventh step of the method the most (positive) or least (negative) influence on the performance, in particular the reduction or increase in the performance, of the EOC system and/or the most (positive) or least (negative) influence on the stability or robustness, in particular the reduction or increase in the stability or the robustness, of the operating parameter having the EOC system on the basis of the comparison.
  • that operating parameter is selected which or its (numerical) value has the most (positive) or least (negative) influence on the performance, in particular the reduction or increase in performance, of the EOC system and/or has the most (positive) or least (negative) influence on the stability or robustness, in particular the reduction or increase in stability or robustness, of the EOC system.
  • That operating parameter is selected which causes a (maximum) increase in the stability of the EOC system, which can possibly be accompanied by a reduction in the performance of the EOC system.
  • the selected operating parameter of the EOC system is a forgetting factor ⁇ or an increment ⁇ .
  • the operating parameters are selected in particular with the proviso that the stability or robustness of the EOC system under the given acoustic conditions is influenced as little as possible, i. H. reduced as little as possible or influenced as positively as possible, d. H. increased as possible.
  • the selection can be made via a selection device implemented in hardware and/or software.
  • the selection device can also form a hardware and/or software-implemented functional component of the EOC system or a control device of the EOC system.
  • the operating parameter having the lowest or highest value can be selected.
  • the selection of an operating parameter with the lowest value applies in particular to the forgetting factor ⁇ as an example of an operating parameter or the comparison of a forgetting factor ⁇ with a comparison forgetting factor ⁇ ′.
  • the EOC system is operated using the selected operating parameter.
  • the selected operating parameter is then used as a basis for generating corresponding compensation signals.
  • the compensation signals can be output via at least one output element associated with the EOC system and/or via audio output elements of the audio output device. In the latter case, the compensation signals can be added to the audio signal to be output or output via the audio output elements of the audio output device.
  • pre-filtering can be carried out before the spectral components of the sum signal are detected in the third step.
  • the pre-filtering can be used in particular to filter frequency ranges of the sum signal, i. H. in particular to remove those which do not correspond to the frequency range in which the EOC system generates compensation signals.
  • the pre-filtering device used can therefore be set up in particular to filter frequency ranges of the sum signal, i. H. in particular to remove those which do not correspond to the frequency range in which the EOC system generates compensation signals.
  • the modification of the detected spectral components to generate modified spectral components can be done by generating an additional input amplification, ie an additional gain, in the area of a first (local) increase in the respective spectral component(s) in the time domain.
  • the detected spectral components can therefore be generated by a specifically generated amplification in the area of a first increase in the respective spectral component in the time domain.
  • the spectral components are typically is a frequency spectrum plotted as a function of time, ie in the time domain. In particular, this means a change in the extracted spectral components over time.
  • the modification of the recorded spectral components to generate modified spectral components can alternatively or additionally be done by lengthening the time of the spectral components in the area of a (local) decrease, in particular a decrease following a (local) increase, of the spectral components in the time domain.
  • the detected spectral components can therefore be produced by a specifically generated lengthening (stretching) in the area of a corresponding descent of the respective spectral component in the time domain.
  • the time extension of the descent of the respective spectral component (s) can z. B. a by the duration of an impulse response, d. H. in particular a room impulse response, an acoustic sensor element associated with the EOC system or an acoustic sensor device associated with the EOC system, d. H. e.g. B. a microphone, according to an audio signal emitted into the interior correspond to a certain time interval.
  • the lengthening of the descent over time can follow an envelope curve by a signal curve of the or an impulse response, d. H. correspond in particular to a room impulse response, an acoustic sensor device associated with the EOC system or an acoustic sensor element associated with such an acoustic sensor element after a certain time interval emitted into the interior of the vehicle.
  • the spectral components can, for example, have a rectangular (temporal) profile with a particular sudden rise from a reference value to a plateau value at a specific point in time, a specific temporal, essentially constant profile on the plateau value and a specific point in time from the plateau value occurring, in particular sudden, descent to the reference value.
  • Other spectral curves are fundamentally conceivable.
  • the modification of spectral components exhibiting a corresponding rectangular or square-shaped course can be carried out accordingly by generating an additional input amplification, ie an additional gain, in the area of the first increase.
  • the modification of spectral components exhibiting such a rectangular or rectangular course can be carried out accordingly by lengthening or stretching in the region of the descent. The same applies to spectral components which have different types of profiles in comparison to rectangular or rectangular profiles.
  • the audio signals to be output into the interior of the motor vehicle are detected in particular before the audio signals are detected by the acoustic sensor device of the EOC system.
  • the recording and summarizing of all audio signals to be output via the audio output device therefore takes place in particular before the audio signals are actually output via the audio output device into the interior of the motor vehicle equipped with the EOC system operated or operable according to the method.
  • the recording and summarizing of all audio signals to be output via the audio output device therefore takes place in particular before the audio signals are actually acoustically perceptible, i. H. in particular audibly, for a vehicle occupant located in the interior of the motor vehicle equipped with the EOC system operated or operable according to the method.
  • the invention also relates to an EOC system for a motor vehicle according to claim 8, which is set up to generate compensation signals serving to compensate for acoustic interference signals resulting from the operation of the or a motor vehicle drive unit.
  • the EOC system is set up to carry out the method. All statements in connection with the procedure apply analogously to the EOC system.
  • the EOC system therefore includes in particular the functional components mentioned in connection with the method, ie in particular the devices implemented in terms of hardware and/or software, of the EOC system or a control device of the EOC system.
  • the EOC system or a control device of the EOC system communicates with the functional components mentioned in connection with the method, ie in particular the hardware and/or software implemented devices of the EOC system.
  • the invention also relates to a motor vehicle, i. H. in particular a passenger car, which comprises at least one EOC system as described herein. All statements in connection with the method therefore also apply analogously to the motor vehicle.
  • FIG. 1 shows a basic representation of a flowchart to illustrate a method according to an embodiment.
  • the method is used to operate an EOC system 1, which, on the basis of or using system-side operating parameters, such as a forgetting factor ⁇ and an increment ⁇ , is used to generate compensation signals that serve to compensate for acoustic interference signals 3 resulting from the operation of a motor vehicle drive unit 2 4 is set up.
  • system-side operating parameters such as a forgetting factor ⁇ and an increment ⁇
  • the EOC system 1 that can be operated or operated according to the method is installed in a motor vehicle 5, in which it is used to compensate for from the operation of the drive unit 2 on the motor vehicle, ie e.g .
  • the operation of the EOC system 1 basically includes the detection of corresponding acoustic interference signals 3 by means of a suitable acoustic sensor device 6 or acoustic sensor elements 7 associated with it.
  • B. act around microphones - of the EOC system 1, the generation of artificial compensation signals 4 on the basis of the detected acoustic interference signals 3 and the outputs of the generated compensation signals 4 by means of a suitable acoustic output device 9 or this associated acoustic output elements 10 - this can be z .
  • B. are speakers - in the passenger compartment 8 of the motor vehicle 5 equipped with the EOC system 1.
  • the compensation signals 4 cause, in particular due to a phase opposite to the phase of the respective acoustic interference signals 3, an optionally complete suppression of the acoustic interference signals 3, so that the acoustic interference signals 3 are acoustically imperceptible or hardly perceptible to vehicle occupants.
  • a first step S1 of the method all of the audio output elements 11 via one or more audio output elements are detected—this can be z.
  • B. be speakers - comprehensive audio output device 12 in the passenger compartment 8 of equipped with the EOC system 1 motor vehicle 5 audio signals 13 to be output.
  • the audio signals 13 are, for example, music and / or voice signals.
  • the audio signals 13 are not the compensation signals 4 that can be generated or are generated by the EOC system 1.
  • B. be an entertainment and / or multimedia device for outputting entertainment and / or multimedia content in the passenger compartment 8 of the motor vehicle 5 act - or detected via the audio output device 12 associated audio output elements 11.
  • the audio signals 13 are detected via a detection device 14 implemented in hardware and/or software.
  • the detection device 14 can form a functional component of the EOC system 1 implemented in hardware and/or software or a control device 28 of the EOC system 1 .
  • the audio signals 13 to be output into the passenger compartment 8 are detected before the actual output of the audio signals 13 into the passenger compartment 8.
  • the audio signals 13 to be output into the passenger compartment 8 are detected in particular before the audio signals 13 are detected by the acoustic sensor device 6 of the EOC System 1 or the associated acoustic sensor elements 7.
  • a sum signal 15 describing all recorded audio signals 13 is generated.
  • B. done by an arithmetic summation - and described in a sum signal 15.
  • the summation signal 15 can therefore be generated by (arithmetically) summing up all of the recorded audio signals 13 .
  • the sum signal 15 therefore contains all recorded audio signals 13 or their sum.
  • Sum signal 15 also contains in particular all possible harmonic and non-harmonic components of audio signals 13 and all associated audio signal output parameters, i. H. e.g. B. volume, treble, middle, bass (bass), etc., and/or audio signal processing parameters, d. H. e.g. B. non-linear audio signal processing parameters, delay, reverberation, etc.
  • the summation of the audio signals 13 and the generation of the sum signal 15 takes place via a hardware and/or software implemented summation device 16.
  • the summation device 16 can also be implemented in hardware and/or software form a functional component of the EOC system 1 or a control device 28 of the EOC system 1 .
  • a third step S3 of the method those spectral components of the sum signal 15 are extracted whose frequencies correspond to the frequencies of the acoustic interference signals 3 to be compensated or compensated for by the EOC system 1 .
  • signal processing of the sum signal 15 takes place in such a way that those spectral components of the sum signal 15 whose frequencies correspond to the frequencies of the acoustic interference signals 3 to be compensated or compensated by the EOC system 1 are extracted from the sum signal 15.
  • the frequencies of the extracted spectral components of the sum signal 15 and the frequencies of the acoustic interference signals 3 to be compensated or compensated for by the EOC system 1 are therefore typically same frequencies.
  • the frequencies of the acoustic interference signals to be compensated or compensated for by the EOC system 1 are known for the EOC system 1, so that in the third step S3 a comparison of the frequencies of the extracted spectral components of the sum signal 15 with the known frequencies of the acoustic interference signals 3 to be compensated or compensated for by the EOC system 1 .
  • the extraction of the spectral components of the sum signal 15, the frequencies of which correspond to the frequencies of the acoustic interference signals 3 to be compensated or compensated for by the EOC system 1, takes place via an extraction device 17 implemented in hardware and/or software.
  • the extraction device 17 can also have a hardware and/or a functional component of the EOC system 1 implemented in terms of software or a control device 28 of the EOC system 1.
  • the sum signal 15 is pre-filtered (optional) before extracting the spectral components, i. H. one by means of a pre-filtering device 18 - this can be z. B. be a low-pass filter device - subjected to pre-filtering carried out.
  • the pre-filtering can be used in particular to filter frequency ranges of the sum signal 15 which do not correspond to the frequency range in which the EOC system 1 generates compensation signals.
  • the pre-filtering device 18 can therefore be set up in particular to filter frequency ranges of the sum signal 15 which do not correspond to the frequency range in which the EOC system 1 generates compensation signals.
  • a fourth step S4 of the method the extracted spectral components are modified to generate modified spectral components.
  • the spectral components extracted in the third step S3, ie the spectral components of the sum signal 15, whose frequencies correspond to the frequencies of the acoustic interference signals 3 to be compensated or compensated by the EOC system 1, are then specifically modified or changed .
  • the modification takes place via a modification device 19 implemented in hardware and/or software.
  • the modification device 19 can also form a functional component of the EOC system 1 implemented in hardware and/or software or a control device 28 of the EOC system 1 .
  • the modified spectral components are converted into at least one operating parameter of the EOC system 1.
  • the modified spectral components generated in the fourth step S4 are converted into an operating parameter by suitable data or signal processing of the EOC system 1 converted.
  • the operating parameter of the EOC system 1 can typically be influenced or influenced or described or described by the spectral components, so that a conversion is possible.
  • the operating parameter of the EOC system 1 can also typically be described numerically.
  • the operating parameter of the EOC system 1 is the forgetting factor ⁇ or the increment ⁇ .
  • the conversion takes place via a hardware and/or software implemented conversion device 20.
  • the conversion device 20 can also form a hardware and/or software implemented functional component of the EOC system 1 or a control device 28 of the EOC system 1.
  • a sixth step S6 of the method the operating parameter of the EOC system 1 obtained by converting the modified spectral components is compared with at least one comparison operating parameter or reference operating parameter.
  • the subsequent selection of an operating parameter of the EOC system 1 is then compared in preparation for the operating parameter of the EOC system 1 obtained in the fifth step S5 with at least one comparison operating parameter.
  • the operating parameter of the EOC system 1 obtained in the fifth step S5 is the forgetting factor ⁇ or the increment ⁇ .
  • the comparison parameter can therefore be e.g. B. be a comparison forgetting factor ⁇ 'or a comparison increment ⁇ '.
  • the comparison operating parameter can typically be influenced or influenced or described or described by the spectral components.
  • the comparison operating parameter can also typically be described numerically, so that a (simple) numerical comparison of operating parameters with comparison operating parameters can be carried out in the sixth step S6.
  • the comparison takes place via a comparison device 21 implemented in hardware and/or software.
  • the comparison device 21 can also form a hardware and/or software-implemented functional component of the EOC system 1 or a control device 28 of the EOC system 1 .
  • a seventh step S7 of the method the most positive or least negative influence on the performance of the EOC system 1 and/or the most positive or least negative influence on the stability or robustness of the EOC system 1 is selected respectively the stability or robustness of the operation of the EOC system 1 having operating parameters on the basis of the comparison.
  • that operating parameter is then selected which or its (numerical) value has the most positive or least negative influence on the performance of the EOC system 1 and/or the most positive or least negative Influence on the stability or robustness of the EOC system 1 has.
  • the selected operating parameter of the EOC system 1 is the forgetting factor ⁇ or the increment ⁇ .
  • the operating parameters are selected in particular with the proviso that the stability or robustness of the EOC system 1 under the given acoustic conditions is influenced as little as possible, i. H. reduced as little as possible or influenced as positively as possible, d. H. increased as possible.
  • the selection is made via a selection device 22 implemented in hardware and/or software.
  • the selection device 22 can also form a functional component of the EOC system 1 implemented in hardware and/or software or a control device 28 of the EOC system 1 .
  • the operating parameter having the lowest or highest value can be selected.
  • the selection of an operating parameter that has the lowest value applies in particular to the forgetting factor ⁇ , since a forgetting factor ⁇ that has the lowest possible value typically allows the EOC system 1 to operate as stably as possible.
  • step S8 of the method the EOC system 1 is finally operated using the selected operating parameter.
  • the selected operating parameter is then used as a basis for generating corresponding compensation signals 4 during operation of the EOC system 1 .
  • the output of Compensation signals 4 can be output from the output element(s) 10 associated with the EOC system 1 and/or via the audio output element(s) 11 of the audio output device 12 . In the latter case, the compensation signals 4 can be added to the audio signal to be output or output via the audio output element(s) 11 of the audio output device 12 .
  • FIG. 3 shows a basic representation of a time course of spectral components 23 according to an embodiment; in the 3 The spectral components 23 shown are therefore plotted in the time domain, with the x-axis representing the time axis.
  • the spectral components 23 can have a square-wave (time) profile with a particular time t 1 occurring from a reference value R, in particular a sudden increase to a plateau value P, a certain time-related, essentially constant profile on the plateau value P and a, in particular sudden, drop 27 from the plateau value P to the reference value R at a specific point in time t 2 .
  • the spectral components 23 can therefore take place through a specifically generated amplification in the area of a first rise 24 of the spectral components 23 in the time domain.
  • the purposefully generated amplification takes place in the exemplary embodiment according to FIG 3 at time t 1 .
  • the modification of the spectral components 23 to generate modified spectral components can - as well as in 3 shown - alternatively or additionally by temporal extension 26 (expansion) of the spectral components 23 in the region of a (local) descent 27, in particular one of the (local) rise 24 following (Local) descent 27, the spectral components 23 take place in the time domain.
  • the spectral components 23 can therefore occur through a specifically generated extension 26 in the area of a corresponding descent 27 of the spectral components 23 in the time domain.
  • the specifically generated extension 26 takes place in the exemplary embodiment according to FIG 3 at time t 2 .
  • the time extension 26 of the descent 27 of the spectral components 23 can be influenced by the duration of an impulse response, i. H. correspond in particular to a room impulse response of an acoustic sensor element 7 associated with the EOC system 1 or the acoustic sensor device 6 associated therewith after a certain time interval emitted into the passenger compartment 8 audio signal.
  • the time extension 26 of the descent 27 can be extended over time according to an envelope by a signal curve of the or an impulse response, i. H. in particular a room impulse response corresponding to the acoustic sensor device 6 associated with the EOC system 1 or to the acoustic sensor element 7 associated with it after a specific time interval emitted into the passenger compartment 8 audio signal.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Claims (9)

  1. Procédé pour faire fonctionner un système d'annulation de commande de moteur (1), d'un système EOC, lequel est mis au point pour générer des signaux de compensation (4) servant à la compensation de signaux parasites acoustiques (3) résultant du fonctionnement d'un groupe d'entraînement (2) du côté du véhicule à moteur sur la base de paramètres de fonctionnement du côté du système, avec des étapes suivantes :
    - de détection de tous les signaux audio (13) à envoyer par l'intermédiaire d'un système d'envoi audio (12), comprenant un élément d'envoi audio (11), dans un espace intérieur d'un véhicule à moteur (5), en particulier un habitacle (8) d'un véhicule à moteur (5),
    - de génération d'un signal de somme (15) décrivant tous les signaux audio (13) détectés,
    - d'extraction des composantes spectrales (23) du signal de somme (15) éventuellement préfiltré, dont les fréquences correspondent aux fréquences des signaux parasites acoustiques (3) à compenser ou compensés par le système EOC (1), dans lequel les fréquences des signaux acoustiques à compenser ou compensés par le système EOC (1) sont connues ;
    - de modification des composantes spectrales (23) extraites respectives pour générer des composantes spectrales modifiées (23'), caractérisé par
    - la conversion des composantes spectrales modifiées (23') en un paramètre de fonctionnement du système EOC (1), dans lequel le paramètre de fonctionnement est le facteur d'oubli ou l'incrément ;
    - la comparaison du paramètre de fonctionnement du système EOC (1) à un paramètre de fonctionnement de comparaison ;
    - la sélection du paramètre de fonctionnement présentant la plus grande part d'influence sur la performance du système EOC (1) et/ou la stabilité du système EOC (1) sur la base de la comparaison ;
    - le fonctionnement du système EOC (1) en appliquant le paramètre de fonctionnement sélectionné, dans lequel
    la modification des composantes spectrales (23) détectées pour générer des composantes spectrales modifiées (23') est effectuée en générant une amplification d'entrée supplémentaire dans la plage d'une première hausse (24) de la composante spectrale (23) respective dans le domaine de temps, et/ou la modification des composantes spectrales (23) détectées respectives pour générer des composantes spectrales modifiées (23') est effectuée en prolongeant dans le temps (26) la composante spectrale (23) respective dans la plage de la baisse (27) de la composante spectrale respective dans le domaine de temps.
  2. Procédé selon la revendication 1, dans lequel le paramètre de fonctionnement présentant la valeur la plus faible est sélectionné.
  3. Procédé selon la revendication 1 ou 2, dans lequel un préfiltrage est mis en oeuvre avant la détection des composantes spectrales du signal de somme (15), dans lequel des plages de fréquence du signal de somme (15) sont filtrées, lesquelles ne correspondent pas à la plage de fréquences, dans laquelle le système EOC (1) génère des signaux de compensation.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la modification des composantes spectrales (23) détectées respectives pour générer des composantes spectrales modifiées (23') est effectuée en prolongeant dans le temps (26) la composante spectrale (23) respective dans la plage d'une baisse (27) de la composante spectrale respective dans le domaine de temps, dans lequel le prolongement dans le temps (26) de la baisse (27) de la composante spectrale (23) respective correspond à un intervalle de temps défini selon un signal audio émis dans l'espace intérieur par la durée d'une réponse en impulsion d'un élément de capteur (7) acoustique appartenant au système EOC (1).
  5. Procédé selon la revendication 4, dans lequel le prolongement dans le temps (26) de la baisse (27) correspond à son profil dans le temps selon une enveloppante d'un profil de signal d'une réponse en impulsion d'un élément de capteur (7) acoustique appartenant au système EOC (1) selon un signal audio émis dans l'espace intérieur.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la détection et le regroupement des tous les signaux audio à envoyer par l'intermédiaire du système d'envoi audio (12) ont lieu avant que les signaux audio ne soient réellement envoyés dans l'espace intérieur.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel la génération du signal de somme (15) est effectuée par le cumul de tous les signaux audio détectés.
  8. Système d'annulation de commande de moteur (1) comprenant un dispositif d'envoi audio (12), lequel comprend au moins un élément d'envoi audio, dans lequel le système d'annulation de commande de moteur (1) est mis au point pour générer des signaux de compensation (4) servant à la compensation de signaux parasites acoustiques (3) résultant du fonctionnement d'un groupe d'entraînement (2) du côté du véhicule à moteur, caractérisé en ce qu'il est mis au point pour la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes.
  9. Véhicule à moteur (5) comprenant un système d'annulation de commande de moteur (1) selon la revendication 8.
EP18734148.2A 2018-06-18 2018-06-18 Procédé de fonctionnement d'un système d'annulation de commande de moteur Active EP3807869B1 (fr)

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PCT/EP2018/066142 WO2019242837A1 (fr) 2018-06-18 2018-06-18 Procédé de fonctionnement d'un système d'annulation de commande de moteur

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EP3807869A1 EP3807869A1 (fr) 2021-04-21
EP3807869B1 true EP3807869B1 (fr) 2023-05-10

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5170433A (en) * 1986-10-07 1992-12-08 Adaptive Control Limited Active vibration control
US5418857A (en) * 1993-09-28 1995-05-23 Noise Cancellation Technologies, Inc. Active control system for noise shaping
US20040086135A1 (en) * 2002-11-01 2004-05-06 Siemens Vdo Automotive Inc. Active noise control system using pure feedforward method with order-based offline calibration
GB2551464A (en) * 2016-03-17 2017-12-27 Jaguar Land Rover Ltd Apparatus and method for noise cancellation

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EP3807869A1 (fr) 2021-04-21

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