EP4158427A1 - Steuern eines technischen systems mittels eines datenbasierten regelungsmodells - Google Patents
Steuern eines technischen systems mittels eines datenbasierten regelungsmodellsInfo
- Publication number
- EP4158427A1 EP4158427A1 EP20754664.9A EP20754664A EP4158427A1 EP 4158427 A1 EP4158427 A1 EP 4158427A1 EP 20754664 A EP20754664 A EP 20754664A EP 4158427 A1 EP4158427 A1 EP 4158427A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- data
- model
- control model
- technical system
- based control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 238000013507 mapping Methods 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 230000006870 function Effects 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 4
- 238000010801 machine learning Methods 0.000 claims description 3
- 238000012549 training Methods 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 33
- 230000008569 process Effects 0.000 description 8
- 238000004088 simulation Methods 0.000 description 6
- 238000013528 artificial neural network Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000003542 behavioural effect Effects 0.000 description 2
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/048—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators using a predictor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/0265—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion
Definitions
- the invention relates to a computer-implemented method and a device for configuring a controller for controlling a technical system, a computer-implemented method and a controller for controlling a technical system using a data-based control model configured in this way, and a computer program product.
- Efficient operation of a technical system typically takes place via parallel control.
- Control is usually carried out on the basis of predetermined control parameters or manipulated variables, starting from a detected system state, it being possible for optimal control parameters or manipulated variables to be determined using model predictive control methods.
- Such an operational control is difficult or even impossible, especially for complex systems due to the higher computing effort.
- the invention relates to a computer-implemented method for configuring a controller for controlling a technical system, a) reading in a model-predictive control model for the controller, the model-predictive control model being set up
- the aim is to output optimized control parameters for controlling the technical system as output data as a function of simulated and/or measured status data of the technical system, b) reading in a data-based control model, c) setting configuration parameters of the data-based control model using the model-predictive control model in such a way that that the data-based control model, depending on the status data read from the technical system, reproduces the output data of the model-predictive control model and determines optimized control parameters configured in this way, and d) outputting the data-based control model configured in this way to control the technical system to the controller.
- the data-based control model configured in this way can in particular be output to a controller for controlling the technical system.
- the device according to the invention can be coupled to such a controller.
- the invention relates to a device for configuring a controller for controlling a technical system, comprising
- model-predictive control model being set up to output optimized control parameters for controlling the technical system as output data, depending on simulated and/or measured status data of the technical system, and import a data-based control model
- a configurator that is set up to set configuration parameters of the data-based control model using the model-predictive control model in such a way that the data-based control model, depending on read-in status data of the technical system, output data of the model-predictive control model is reproduced and optimized control parameters configured in such a way are determined,
- An output module that is set up to output the configured data-based control model for controlling the technical system's to the controller.
- the method according to the invention can be realized in particular with computer support.
- the terms “perform”, “calculate”, “computer-aided”, “calculate”, “determine”, “generate”, “configure”, “reconstruct” refer and the like, preferably to actions and/or processes and/or processing steps that change and/or generate data and/or convert the data into other data, with the data being represented or being present in particular as physical variables, for example as electrical ones impulses.
- the term “computer” should be interpreted as broadly as possible, in particular to cover all electronic devices with data processing properties.
- Computers can thus be, for example, personal computers, servers, programmable logic controllers (PLCs), handheld computer systems, Pocket PC devices, mobile phones and other communication devices that can process computer-aided data, processors and other electronic devices for data processing.
- the device according to the invention can be configured in hardware and/or software. If the device is configured in hardware, it can in particular include at least one processor.
- a processor can be understood to mean, for example, a machine or an electronic circuit.
- a processor can in particular be a central processing unit (CPU), a microprocessor or a microcontroller, for example an application-specific integrated circuit or a digital signal processor, possibly in combination with a memory unit for storing program instructions , etc. act. Also can under one Processor a virtualized processor, a virtual machine or a soft CPU are understood.
- Provision in particular with regard to data and/or information, can be understood in connection with the invention as computer-aided provision, for example.
- the provision takes place, for example, via an interface, such as a network interface or an interface to a storage unit
- Corresponding data and/or information can be transmitted and/or sent and/or called up and/or received via such an interface, for example when it is made available.
- model predictive control model can in particular be understood as a time-discrete dynamic model of a process of the technical system to be controlled Model-predictive control model/With a model-predictive control, a future process behavior can be calculated as a function of input signals or control parameters.
- control parameters can thus be understood to mean, in particular, input signals or manipulated variables for regulating/controlling the technical system.
- a state of the technical system is changed as a function of the control parameters.
- the model-predictive control model is set up as a function of simulated and/or measured status data of the technical system.
- the model-predictive control model can be used in particular on the basis of a provided computer-aided simulation model of the technical system. be directed in order to output optimized control parameters for controlling the technical system as output data as a function of status data of the technical system generated by means of the computer-aided simulation model.
- a technical system can in particular be a plant, a process plant/procedural plant, a power plant, a device, a machine (e.g. a turbine), a robot, a vehicle, an autonomous vehicle or infrastructure networks (e.g. for water, gas, electricity or oil) are understood.
- a "data-based control model” can in particular be a computer-aided model that is set up in such a way as to output control parameters for controlling the technical system as a function of data, here status data.
- the data-based control model is preferably based on a machine learning method or artificial intelligence.
- the data-based control model is an artificial neural network.
- a data-based control model in particular a reinforcement learning-based model
- the data-based control model is not trained using training data, or with less computational effort, because the configuration parameters, e.g. weights of an artificial neural network, are set using the model-predictive control model in such a way that the output of the model-predictive control model is reproduced by the data-based control model.
- the method makes it possible to cover a larger state space or behavior space, since the data-based control model is trained not just in a training data space. In other words, when mapping a model-predictive control model to the data-based control model, a larger behavioral space is required. taken into account, such as extreme scenarios that typically rarely occur in measured data, but in which the control should also function correctly. This is achieved in particular by the fact that a range of validity is covered in the model predictive control if the physics-based equations are valid.
- the present method thus requires less computing effort than conventional training of a data-based model, such as a reinforcement learning model.
- Information from the model-predictive control is thus used and extracted in order to configure the data-based control model.
- this method can be used to determine an initial configuration of the data-based control model.
- the configuration parameters of the data-based control model can be set by mapping the model-predictive control model onto the data-based control model.
- the model-predictive control model can be present, for example, as a state space model or in a state space representation. All relationships between the input, output and state variables can be displayed in the form of matrices and vectors. In this way, a mapping, in particular a geometric mapping, of the model-predictive control model onto the data-based control model can be implemented. The configuration parameters of the data-based control model are therefore set by the mapping.
- the model representation of the data-based control model can be adapted from the information from the model-predictive control, such as state and manipulated variable, so that the output of the data-based control model reproduces the output of the model-predictive control model.
- a mapping matrix or mapping function can, for example, be based on the model-predictive control model and the targeted output of the data-based control model can be determined.
- the configuration parameters of the data-based control model are preferably set in such a way that, depending on the input values, the output values of the model-predictive control and the output values of the data-based control model converge.
- the data-based control model can be set up on the basis of a machine learning method.
- the data-based control model can be set up as an agent of a reinforcement learning method.
- model-predictive control model can be mapped onto the agents of the reinforcement learning method, with the configuration parameters being set accordingly in order to reproduce the output of the model-predictive control model.
- the configuration parameters of the data-based control model can be adjusted using additional status data and using the reinforcement learning method to determine additional optimized control parameters.
- the configured data-based control model can be viewed as preconfigured or trained, i.e. the configuration parameters are preset using the model-predictive control model.
- the accuracy of the data-based control model can be improved by means of further training data, i.e. further status data of the technical system.
- the model-predictive control model can be based on a nes method of model predictive control must be set up.
- the invention relates to a computer-implemented method for controlling a technical system, comprising the method steps:
- the method can be carried out in particular by a controller which includes a data-based control model configured according to the invention for controlling the technical system.
- a controller can be understood in particular as a device which, in technical systems (particularly as part of a control loop), selects the desired gear, the correct level, strength or the like. adjusted or regulated by something.
- the invention relates to a regulator for controlling a technical system, comprising
- control module that is set up to receive a data-based control model configured according to the invention and to output optimized control parameters by evaluating the data-based control model using the measured status data of the technical system
- the invention relates to a computer program product which can be loaded directly into a programmable computer, comprising program code parts which, when the program is executed by a computer, cause the latter to carry out the steps of a method according to the invention.
- a computer program product can, for example, be stored on a storage medium such as a memory card, USB stick, CD-ROM, DVD, a non-volatile/permanent storage medium (non-transitory storage medium) or in the form of a downloadable file from a server in a network be made available or delivered.
- a storage medium such as a memory card, USB stick, CD-ROM, DVD, a non-volatile/permanent storage medium (non-transitory storage medium) or in the form of a downloadable file from a server in a network be made available or delivered.
- FIG. 1 shows an exemplary embodiment of the method according to the invention for configuring a controller for controlling a technical system
- FIG. 2 shows an exemplary embodiment of the device according to the invention for configuring a controller for controlling a technical system
- FIG 3 shows an exemplary embodiment of the method according to the invention for controlling a technical system
- Fig. 4 an embodiment of an inventive
- Controller for controlling a technical system.
- FIG. 1 shows an exemplary embodiment of the computer-implemented method according to the invention for configuring a controller for controlling a technical system as a flowchart.
- the technical system can be a complex technical facility, such as a factory facility.
- the computer-implemented method includes the following steps:
- a model-predictive control model is provided, step SO.
- the model-predictive control model preferably makes it possible to determine and output optimized control parameters for controlling the technical system.
- the model-predictive control model is thus set up to output optimized control parameters as output data as a function of (computer-based) simulated and/or measured status data of the technical system.
- the determination of the optimized control parameters is based on an optimization process.
- model-predictive control model can be generated on the basis of a method of model-predictive control or a Lyapunov function, in particular a target behavior of the system to be controlled by defining formal specifications, such as control quality, time Requirements, prohibited areas of work, and behavioral function, and other restrictions, such as logistics, can be defined.
- the status data can be measured and made available, for example, using at least one sensor. Additionally or alternatively, the status data can also be determined and made available by means of a computer-aided simulation of the technical system. In this case, the model-predictive control model can be generated on the basis of a computer-aided simulation model of the technical system.
- the model-predictive control model is read.
- the model-predictive control model can be used in particular to determine optimized control parameters depending on the status data provided by the technical system. This allows data pairs consisting of status data and associated optimized control parameters to be generated.
- a data-based control model is read.
- the data-based control model can be a reinforcement learning model, e.g. implemented as an artificial neural network.
- the data-based control model can only be preconfigured, i.e. it is suitable for controlling the technical system, for example, but not yet optimized for it. In other words, a form or preconfiguration of the data-based control model can thus preferably be specified.
- step S3 configuration parameters of the data-based control model are adjusted in order to reproduce the output data of the model-predictive control model.
- the data pairs consisting of status data and associated optimized control parameters are used, which are provided by the model predictive control. These dates- pairs represent a first feasible result.
- the data-based control model (the RL algorithm) is now set up in such a way that it reproduces this result.
- model-predictive control model is mapped onto the data-based control model in order to set the configuration parameters.
- the mapping can be done analytically or numerically, for example.
- the internal structure of the model-predictive control model is mapped onto the internal structure of the data-based control model in such a way, e.g. by a geometric mapping, that the data-based control model reproduces the model behavior of the model-predictive control model.
- the configuration parameters of the data-based control model are set in such a way that this outputs the control parameters determined by the model-predictive control model as a function of input status data. This can be treated like an inverse problem using Bayesian fitting, for example.
- mapping can be described in other words as follows:
- the technical system typically has at least one observable, time-dependent state x(t), which depends on a control parameter u(t).
- the following optimization problem can be solved using model-predictive control: a function J(u,x), which specifies desired requirements for the technical system, is minimized with respect to the control parameter u in order to determine an optimized control parameter u'.
- the optimization can be solved numerically as well as analytically or using a black box solver. This is preferably carried out for a large number of given initial states x0 in order to obtain optimized control parameters u′(x0) in each case.
- These data pairs (x0,u'(x0)) can be used for configuring the data-based control model are used.
- a model underlying the data-based control model such as an artificial neural network, can be denoted as RL(w; x_0), where w represent the configuration parameters of the data-based control model.
- w represent the configuration parameters of the data-based control model.
- These parameters can be determined by mapping the model-predictive control model onto the data-based control model, so that the output of the data-based control model matches the output of the model-predictive model within a tolerance range.
- the configuration parameters w determined in this way can be understood in particular as initial configuration parameters of the data-based control model, ie the data-based control model can be further adapted to the technical system through further training using status data of the technical system.
- the data-based control model configured in this way is output to the controller.
- the technical system can be controlled by the controller using the data-based control model. In particular, this is less computationally intensive and thus enables operational control even with complex technical systems.
- the configured, data-based control model can preferably be further adapted to the technical system using additional training data.
- the data-based control model can be set up as an agent of a reinforcement learning process and can be adapted using the reinforcement learning process using additional status data, e.g. during ongoing operation of the technical system.
- the data-based control model/agent can thus be continuously improved.
- FIG. 2 shows an exemplary embodiment of a computer-implemented method according to the invention for controlling a technical system by means of a configured, data-based control model.
- the data-based control model is read.
- the data-based control model is preferably configured according to a method as shown by way of example in FIG. 1, ie the data-based control model is set up to output optimized control parameters for the technical system as a function of given status data of the technical system.
- the data-based control model configured in this way is, for example, read in by a controller or loaded by it in order to control the technical system.
- Measured status data of the technical system are read in in the next step S20.
- the status data is recorded, for example, by means of at least one sensor. Based on this status data, the technical system should be optimally controlled using the controller configured accordingly.
- step S30 optimized control parameters are determined using the data-based control model.
- the data-based control model is executed for this purpose, so that optimized control parameters are output depending on the state data read in, step S40.
- the controller can control the technical system using these optimized control parameters, step S50.
- FIG. 3 shows an exemplary embodiment of a device 100 according to the invention for configuring a controller for controlling a technical system in a block diagram.
- the device 100 is preferably coupled to the controller.
- the device 100 comprises an interface 101, a configurator 102 and an output module 103.
- the interface 101 is set up to read in a model-predictive control model MPC and a data-based control model RL.
- the model-predictive control model MPC is preferably generated on the basis of a computer-assisted simulation model SIM and is set up in such a way as to determine optimized control parameters for controlling the technical system as a function of status data generated by the simulation model SIM.
- the data-based control model RL can in particular be a reinforcement learning model.
- the configurator 102 is set up to set configuration parameters K of the data-based control model RL using the model-predictive control model, so that the data-based control model RL reproduces the output of the model-predictive control model depending on status data read in.
- the configuration parameters can be set, for example, by mapping the internal structure of the model-predictive control model MPC to the internal structure of the data-based control model RL. For example, this can be a geo metric mapping.
- the data-based control model RL(K) configured according to these configuration parameters K is transmitted to the output module 103 .
- the output module 103 is set up in such a way that it outputs the configured data-based control model RL(K) for controlling the technical system TS to the controller.
- FIG. 4 shows an exemplary embodiment of the controller R according to the invention for controlling a technical system TS, such as a machine or a factory, in a block diagram.
- the controller R is preferably coupled to a device 100 according to the invention for configuring the controller, as described by way of example with reference to FIG. 3, or alternatively comprises such a device 100 (not shown).
- Device 100 provides a configured, data-based control model RL(K) that is set up to output optimized control parameters for controlling technical system TS.
- the controller R includes a first interface RI, a control module R2 and a second interface R3.
- the configured, data-based control model RL(K) is received and read in by the device 100 via the first interface RI.
- measured status data ZD of the technical system TS is read in via the first interface RI.
- the control module R2 is set up in such a way that it receives the data-based control model RL(K) or, alternatively, stores it in an internal memory (not shown) and retrieves it from there.
- the control module R2 is also set up to execute the data-based control model RL(K). At least one optimized control parameter RP for controlling the technical system TS is determined and output as a function of the read-in status data ZD.
- the at least one optimized control parameter RP is output from the second interface R3 to the technical system TS.
- the technical system TS can consequently be controlled by the controller R according to the control parameter RP.
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Abstract
Description
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Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/EP2020/071372 WO2022022816A1 (de) | 2020-07-29 | 2020-07-29 | Steuern eines technischen systems mittels eines datenbasierten regelungsmodells |
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EP4158427A1 true EP4158427A1 (de) | 2023-04-05 |
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EP20754664.9A Pending EP4158427A1 (de) | 2020-07-29 | 2020-07-29 | Steuern eines technischen systems mittels eines datenbasierten regelungsmodells |
Country Status (4)
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US (1) | US20230221686A1 (de) |
EP (1) | EP4158427A1 (de) |
CN (1) | CN116113893A (de) |
WO (1) | WO2022022816A1 (de) |
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DE102023203744A1 (de) | 2023-04-24 | 2024-10-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren und Vorrichtung zum Trainieren eines maschinellen Lernsystems |
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WO2016010601A2 (en) * | 2014-04-23 | 2016-01-21 | The Florida State University Research Foundation, Inc. | Adaptive nonlinear model predictive control using a neural network and input sampling |
EP3404497B1 (de) * | 2017-05-15 | 2021-11-10 | Siemens Aktiengesellschaft | Verfahren und system zur bereitstellung einer optimierten steuerung eines komplexen dynamischen systems |
DE102017115497A1 (de) * | 2017-07-11 | 2019-01-17 | Liebherr-Transportation Systems Gmbh & Co. Kg | Kühlsystem mit modellprädiktiver Regelung |
US10935940B2 (en) * | 2017-08-03 | 2021-03-02 | Johnson Controls Technology Company | Building management system with augmented deep learning using combined regression and artificial neural network modeling |
US10755200B2 (en) * | 2017-09-22 | 2020-08-25 | International Business Machines Corporation | Automated control of circumferential variability of blast furnace |
US11511745B2 (en) * | 2018-04-27 | 2022-11-29 | Huawei Technologies Co., Ltd. | Method and system for adaptively controlling object spacing |
JP7206874B2 (ja) * | 2018-12-10 | 2023-01-18 | 富士電機株式会社 | 制御装置、制御方法及びプログラム |
CN109886342A (zh) * | 2019-02-26 | 2019-06-14 | 视睿(杭州)信息科技有限公司 | 基于机器学习的模型训练方法和装置 |
CN111365828A (zh) * | 2020-03-06 | 2020-07-03 | 上海外高桥万国数据科技发展有限公司 | 结合机器学习实现数据中心节能温控的模型预测控制方法 |
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2020
- 2020-07-29 EP EP20754664.9A patent/EP4158427A1/de active Pending
- 2020-07-29 CN CN202080104662.7A patent/CN116113893A/zh active Pending
- 2020-07-29 WO PCT/EP2020/071372 patent/WO2022022816A1/de active Search and Examination
- 2020-07-29 US US18/015,747 patent/US20230221686A1/en active Pending
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CN116113893A (zh) | 2023-05-12 |
US20230221686A1 (en) | 2023-07-13 |
WO2022022816A1 (de) | 2022-02-03 |
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