JP2020170403A - Simulation system, collection device, collection method, and simulation method - Google Patents

Abstract

To provide a simulation system, collection device, collection method, and simulation method capable of easily identifying a failure in a system.SOLUTION: The simulation system S includes a control unit (ECU) 13, a function device 12, a simulation device 11, and a collection device 1. The control unit executes a program related to vehicle control. The function device is connected to the control unit to simulate a vehicle operation. The simulation device is connected to the function device to simulate the function device and the control unit by outputting a control signal to the function device based on a simulation condition set by a user. The collection device is connected to the function device to collect control signals input and output to and from the function device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a simulation system, a collecting device, a collecting method and a simulation method.

Conventionally, for example, when a control program of a control device incorporating a microcomputer for controlling a vehicle engine, brakes, etc. is developed in advance of an actual vehicle, a simulation device and a control device that simulate the operation of the vehicle with a computer. There is known a simulation system that evaluates the logic of a control program under development by connecting the above (see, for example, Patent Document 1).

In this type of simulation system, a simulation device and a control device are connected to a functional device that simulates vehicle operation, and the functional device and the control device operate based on a signal output from the simulation device, so-called HILS ( Hardware In the Loop Simulation) There is a system.

Japanese Unexamined Patent Publication No. 2011-018107

However, in the prior art, it has not been easy to identify a defect in the HILS system, particularly a defect in a functional device or a control device.

The present invention has been made in view of the above, and an object of the present invention is to provide a simulation system, a collecting device, a collecting method, and a simulation method capable of easily identifying a defect in a system.

In order to solve the above-mentioned problems and achieve the object, the simulation system according to the present invention includes a control device, a functional device, a simulation device, and a collection device. The control device executes a program related to vehicle control. The functional device is connected to the control device and simulates vehicle operation. The simulation device is connected to the functional device and outputs a control signal to the functional device based on simulation conditions set by the user to execute simulation of the functional device and the control device. The collecting device is connected to the functional device and collects control signals input / output to / from the functional device.

According to the present invention, a defect in the system can be easily identified.

FIG. 1 is a block diagram showing a configuration of a simulation system according to an embodiment. FIG. 2 is a block diagram showing a configuration of a collecting device according to an embodiment. FIG. 3 is a flowchart showing a procedure of processing executed by the simulation system according to the embodiment. FIG. 4 is a block diagram showing a configuration of a simulation system according to a modified example.

Hereinafter, embodiments of the simulation system, collection device, collection method, and simulation method disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to this embodiment.

First, the outline of the simulation system according to the embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a simulation system according to an embodiment.

As shown in FIG. 1, the simulation system S includes a collecting device 1, a terminal device 10, a simulation device 11, a functional device 12, and an ECU (Electronic Control Unit) 13. The simulation system S is a so-called HILS (Hardware In the Loop Simulation) system.

The terminal device 10 is, for example, a terminal device operated by a user such as a developer of the ECU 13. The terminal device 10 is, for example, a desktop type or notebook computer type PC (personal computer), a smartphone, a tablet terminal, or the like.

The terminal device 10 receives, for example, simulation conditions (vehicle operation conditions, etc.) in the simulation system S and outputs the simulation conditions to the simulation device 11. Further, the terminal device 10 acquires the calculation result simulated based on the simulation conditions from the simulation device 11 in real time and displays it on the display screen.

The simulation device 11 is connected to the functional device 12 and outputs a control signal to the functional device 12 based on the simulation conditions set by the user to execute the simulation of the functional device 12 and the ECU 13 (simulation step). ..

Further, the simulation device 11 acquires the calculation result of the functional device 12 in the executed simulation, outputs it to the terminal device 10, and displays or stores it in the terminal device 10.

The functional device 12 is a device that is connected to the ECU 13 and executes a simulated process that simulates vehicle operation. For example, the functional device 12 is a control device such as a drive device such as an engine or a motor, a network device related to CAN (Controller Area Network), and the like. In other words, the functional device 12 is a device to which the ECU 13 is connected and inputs / outputs various signals to and from the ECU 13.

The ECU 13 is a control device that executes an execution process for executing a program related to vehicle control. The ECU 13 performs arithmetic processing based on the control signal output from the simulation device 11 via the functional device 12, and outputs the arithmetic result to the simulation device 11 via the functional device 12.

The ECU 13 repeatedly executes the calculation process and the process of outputting the calculation result in a predetermined cycle according to the simulation conditions.

The collecting device 1 is connected to the functional device 12 and executes a collecting step of collecting control signals input / output to the functional device 12.

Here, in the conventional simulation system, if there is a problem in the terminal device or the simulation device, the defective part can be identified by inserting a debug process, but the hardware part without the intervention of the operation system such as the functional device or the ECU. Regarding the defect, for example, it takes time to identify the defect part because it is necessary to check the signal with an oscilloscope and infer from the soft debug result.

Therefore, in the collection method according to the embodiment, the control signal input / output to the functional device 12 is collected to facilitate the identification of the defective portion.

Specifically, the collecting device 1 according to the embodiment is between a control signal (hereinafter, referred to as a first control signal) input / output between the functional device 12 and the ECU 13 and the functional device 12 and the simulation device 11. The control signal (hereinafter referred to as the second control signal) input / output in is collected.

More specifically, the collecting device 1 according to the embodiment includes a first input signal input from the simulation device 11 to the functional device 12 and a first output signal output from the functional device 12 to the simulation device 11. Collect the first control signal.

Further, the collecting device 1 according to the embodiment collects a second control signal including a second input signal input from the ECU 13 to the functional device 12 and a second output signal output from the functional device 12 to the ECU 13.

As a result, for example, the collecting device 1 transmits the collected control signal to the terminal device 10 in real time, so that the user, the abnormality detecting device, or the like can easily identify a defect in the ECU 13 or the functional device 12 from the collected control signal. can do.

Next, the configuration of the collecting device 1 according to the embodiment will be described in detail with reference to FIG. FIG. 2 is a block diagram showing a configuration of the collecting device 1 according to the embodiment.

The collecting device 1 according to the embodiment includes a control unit 2, a storage unit 3, and a transfer unit 4. The control unit 2 includes a collection unit 21. The storage unit 3 stores the signal information 31.

Here, the collecting device 1 includes, for example, a computer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a data flash, an input / output port, and various circuits.

The CPU of the computer functions as the collecting unit 21 of the control unit 2, for example, by reading and executing the program stored in the ROM.

Further, at least any part or all of the control unit 2 may be configured by hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

Further, the storage unit 3 corresponds to, for example, a RAM or a data flash. The RAM or data flash can store signal information 31, information on various programs, and the like. The collecting device 1 may acquire the above-mentioned program and various information via another computer or a portable recording medium connected by a wired or wireless network.

The signal information 31 is information indicating a control signal collected by the collecting unit 21 of the control unit 2.

The collecting unit 21 collects control signals input / output to / from the functional device 12. Specifically, the collecting unit 21 collects the first control signal input / output between the simulation device 11 and the functional device 12 and the second control signal input / output between the functional device 12 and the ECU 13. ..

More specifically, the collecting unit 21 is a first control signal including a first input signal input from the simulation device 11 to the functional device 12 and a first output signal output from the functional device 12 to the simulation device 11. To collect.

Further, the collecting unit 21 collects a second control signal including a second input signal input from the ECU 13 to the functional device 12 and a second output signal output from the functional device 12 to the ECU 13.

The first input signal is a signal obtained by converting a logic signal output from the terminal device 10 into a control signal for the functional device 12 by the simulation device 11 according to a simulation condition set by the user.

The second output signal is a calculation result of the calculation process of the functional device 12 based on the first input signal, and is a control signal for the ECU 13.

The second input signal is a calculation result of the calculation process of the ECU 13 based on the second output signal, and is a control signal for the functional device 12.

The first output signal is the calculation result of the calculation process of the functional device 12 based on the second input signal. That is, in the flow of a series of simulations in the simulation device 11, control signals are input and output in the order of the first input signal, the second output signal, the second input signal, and the first output signal.

The order of the control signals is not limited to the above order, and the second output signal and the second input signal are continuously repeated for a predetermined cycle between the functional device 12 and the ECU 13, and the final calculation is performed. As a result, the first output signal may be output.

That is, by collecting the first control signal and the second control signal by the collecting unit 21, it is possible to easily identify the malfunction of the functional device 12 and the ECU 13 in the series of simulations.

For example, if the first input signal is normal and the second output signal is abnormal, or if the second input signal is normal and the first output signal is abnormal, the functional device 12 may have a problem. Can be identified. Further, when the second output signal is normal and the second input signal is abnormal, it can be identified that the ECU 13 has a problem.

The control unit 2 is not limited to the function of collecting control signals, and may have a function of executing specific processing for identifying a defect based on the first control signal and the second control signal as described above. ..

The transfer unit 4 is, for example, a DMA (Direct Memory Access) controller, and transfers the signal information 31 stored in the storage unit 3 to the simulation device 11. Specifically, the transfer unit 4 transfers the signal information 31 stored in the storage unit 3 in accordance with the DMA request transmitted from the simulation device 11.

That is, the transfer unit 4 transfers the signal information 31 to the simulation device 11 without going through the control unit 2. As a result, the load on the control unit 2 can be reduced, so that the performance of the collection device 1 can be improved.

The simulation device 11 outputs the transferred signal information 31 to the terminal device 10 and displays or stores it in the terminal device 10. In this way, the collecting device 1 transmits the signal information 31 indicating the collected control signal to the external device (terminal device 10) via the simulation device 11, so that, for example, the user can obtain the signal information 31 from the external device. You can check and easily identify the malfunction of the system.

The transfer frequency of the signal information 31 may be, for example, transferred in real time each time the signal information 31 is collected, or may be transferred every one cycle of the simulation.

Further, the transfer destination of the signal information 31 by the transfer unit 4 is not limited to the simulation device 11, and may be directly transferred to, for example, a terminal device 10 or an external terminal that identifies a defect.

Next, the processing procedure of the processing executed by the simulation system S according to the embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing a procedure of processing executed by the simulation system S according to the embodiment.

As shown in FIG. 3, the terminal device 10 receives the simulation conditions from the user and outputs the simulation conditions to the simulation device 11 (step S101). Subsequently, the simulation device 11 executes the simulation of the functional device 12 and the ECU 13 according to the simulation conditions (step S102). The collecting device 1 collects control signals input / output to / from the functional device 12 (step S103). The simulation device 11 determines whether or not the simulation has been completed (step S104). When the simulation is completed (step S104: Yes), the simulation device 11 ends the process, and when the simulation is not completed (step S104: No), the simulation device 11 executes step S102.

As described above, the simulation system S according to the embodiment includes an ECU 13, a functional device 12, a simulation device 11, and a collecting device 1. The ECU 13 executes a program related to vehicle control. The functional device 12 is connected to the ECU 13 and simulates vehicle operation. The simulation device 11 is connected to the functional device 12 and outputs a control signal to the functional device 12 based on the simulation conditions set by the user to execute the simulation of the functional device 12 and the ECU 13. The collecting device 1 is connected to the functional device 12 and collects control signals input / output to and from the functional device 12. This makes it possible to easily identify a system defect.

Although the collecting device 1 according to the embodiment shows only the case of collecting the control signal, for example, a defect or the like can be reproduced based on the collected control signal. This point will be described with reference to FIG.

FIG. 4 is a block diagram showing the configuration of the simulation system S according to the modified example. As shown in FIG. 4, in the simulation system S according to the modified example, the functional device 12 is omitted, and the simulation device 11 and the ECU 13 are connected to the collecting device 1.

In such a case, the simulation device 11 outputs the signal information 31 and the simulation conditions stored in the terminal device 10 to the collection device 1.

The control unit 2 of the collection device 1 further includes a reproduction unit 22. The reproduction unit 22 acquires the signal information 31 and the simulation conditions from the simulation device 11, generates a control signal for the ECU 13, and outputs the control signal to the ECU 13.

The collecting unit 21 has an output signal (corresponding to the above-mentioned second output signal) output from the reproducing unit 22 to the ECU 13 and an input signal (the above-mentioned second input) which is a calculation result of the calculation processing of the ECU 13 based on the output signal. (Corresponding to a signal) is collected and stored in the storage unit 3 as signal information 31.

Thereby, for example, when the user discovers a defect, the defect can be reproduced by transmitting the control signal related to the defect to the collecting device 1.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments expressed and described above. Therefore, various modifications can be made without departing from the spirit or scope of the general concept of the invention as defined by the appended claims and their equivalents.

1 Collection device 2 Control unit 3 Storage unit 4 Transfer unit 10 Terminal device 11 Simulation device 12 Functional device 13 ECU
21 Collection unit 22 Reproduction unit 31 Signal information S simulation system

Claims (7)

A control device that executes programs related to vehicle control,
A functional device connected to the control device that simulates vehicle operation,
A simulation device connected to the functional device and outputting a control signal to the functional device based on simulation conditions set by the user to execute simulation of the functional device and the control device.
A simulation system including a collecting device connected to the functional device and collecting control signals input / output to the functional device. The collecting device is
A first control signal input / output between the functional device and the control device,
The simulation system according to claim 1, wherein a second control signal input / output between the functional device and the simulation device is collected. The collecting device is
The simulation system according to claim 1 or 2, wherein the collected control signal is transmitted to an external device via the simulation device. The collecting device is
Claims 1 to 3 include, when connected to the control device, the collected control signal is transmitted to the control device, and a control signal indicating a calculation result based on the control signal is collected from the control device. The simulation system according to any one of the above. A collecting device including a control device that executes a program related to vehicle control and a collecting unit that collects control signals input and output to the functional device connected to the simulation device that controls the functional device that simulates vehicle operation. A collection method comprising a collection step of collecting control signals input / output to a functional device connected to a control device related to vehicle control and a simulation device for controlling the functional device. An execution process that executes a program related to vehicle control by controlling the control device,
A simulated process that simulates vehicle operation by controlling a functional device connected to the control device.
By controlling the simulation device connected to the functional device, a control signal is output to the functional device based on the simulation conditions set by the user to execute the simulation of the functional device and the control device. Simulation process and
A simulation method including a collection step of collecting control signals input / output to / from the functional device by controlling the collecting device connected to the functional device.

Images