JP4573842B2 - Simulation device - Google Patents

Description

  The present invention includes a model calculation unit that simulates a control target and outputs a simulation signal to a control device, and detects a control signal input from the control device in response to the simulation signal and generates measurement data of the control signal. More specifically, the simulation apparatus includes an output signal measurement unit, and more specifically, a simulation calculation unit that simulates the engine and outputs an engine state signal that represents the state of the engine to the engine control unit, and is input from the engine control unit. The present invention relates to a simulation apparatus including a signal measurement unit that measures an engine control signal and outputs measurement data based on the engine control signal.

  In recent years, in order to reduce the time and cost required for the development of products in various fields and to verify the safety of the products in advance, or to simulate the operation of actual plants, actual devices and plants Used by a simulation device that allows a computer to calculate a model that expresses the role played by the mechanism and electrical signal in the computer, checks the characteristics of the product based on the result, and solves or trains a possible problem in advance Has been.

  As such a simulation apparatus, Patent Document 1 discloses an apparatus for creating an environment in which a vehicular engine control apparatus is virtually mounted on an actual vehicle and performing operation confirmation and performance evaluation, and a program that is set in advance. According to the above, the vehicle model operates as a vehicle model corresponding to a virtual vehicle, generates a simulation signal corresponding to each crank angle and each stroke of the engine, and provides the simulation signal to the vehicle engine control device to confirm the operation and evaluate the performance. There has been proposed a simulation apparatus including a model computer device to be performed and a signal generator that operates in cooperation with the model computer device and generates a signal necessary for a vehicle model of the model computer device.

In the simulation device, a pseudo crank pulse signal is output from the model calculation unit that simulates the engine to the engine control device, and control signals such as fuel injection pulses and ignition pulses output from the engine control device corresponding to this are measured. The measurement data corresponding to the control signal is stored in the memory and then output to the monitor, and the engine control device is normal when the operator visually observes the measurement data displayed on the monitor. It is configured to determine whether or not it is operating.
JP-A-11-326135

  However, in the signal measurement unit of the simulation apparatus described in Patent Document 1 described above, when the control signal output from the engine control apparatus in response to the simulation signal is measured, the measurement data for the control signal is stored in the memory. Since it is configured to be updated, for example, when a control signal output from the engine control device is not measured, or a simulation signal in a state close to engine stop is output from the model calculation unit, and the engine control device When the control signal is not output, there is a problem that the value of the memory that has not been updated, that is, the past measurement data is output as it is.

  Specifically, since the signal input from the model calculation unit to the signal measurement unit is only a signal simulating a crank pulse, the pulse input interval becomes longer as the low rotation state is reached. If it is difficult to identify the state and the current crank angle is within the range set in advance as the measurement timing, it is assumed that the crank pulse signal is not input or that the crank angle is in the reverse rotation state where the crank angle changes in the decreasing direction. However, the past measurement data stored in the memory is output as it is without being identified.

  As a result, there is a problem that it is difficult to make an appropriate determination as to whether or not the engine control device is operating normally. Such a problem occurs not only in the engine simulator but also in any simulator.

  An object of the present invention is to provide a simulation device that can reliably monitor the operation of a control device regardless of the state of a simulation signal output from a model calculation unit in view of the above-described conventional problems.

  In order to achieve the above-described object, the characteristic configuration of the simulation apparatus according to the present invention is inputted from the engine control apparatus and a simulation calculation unit that simulates the engine and outputs an engine state signal representing the engine state to the engine control apparatus. A signal measuring unit that measures an engine control signal and outputs measurement data based on the engine control signal, wherein the signal measuring unit is an engine that is simulated by the simulation calculation unit. When the rotational state is a forward rotational state, measurement data based on the measured engine control signal is output, and the rotational state of the engine simulated by the simulation calculation unit is at least one of a stopped state and a reverse rotational state In this case, preset pseudo measurement data is output.

  According to the above configuration, when a signal from the engine control device is detected by the signal measuring unit with respect to the simulation signal in the positive rotation state output from the simulation calculation unit, the measurement data of the control signal is output, and the engine When a signal from the control device is not detected, preset pseudo measurement data is output, so that it is very easy to determine whether the control signal is a regular control signal from the engine control device. .

  As described above, according to the present invention, it is possible to provide a simulation device that can reliably monitor the operation of the engine control device regardless of the state of the simulation signal output from the simulation calculation unit.

  Below, the simulation apparatus by this invention is demonstrated. As shown in FIGS. 1 and 2, the simulation apparatus 1 is an apparatus for evaluating an engine control apparatus 7 mounted on a vehicle. The simulation apparatus 1 simulates engine operation and is referred to as an engine control apparatus (hereinafter referred to as “control apparatus”). ) Model calculation unit 2 as a simulation calculation unit that outputs a simulation signal to 7, and a signal measurement unit that measures a control signal input from the control device 7 in response to the simulation signal and outputs measurement data of the control signal 3 and an operation device 6 that controls the operation of the model calculation unit 2 and the signal measurement unit 3 based on an operator's operation, and monitors and displays the control signal based on measurement data input from the signal measurement unit 3. Configured.

  The model calculation unit 2 and the signal measurement unit 3 are configured by a plurality of signal processing boards incorporated in the rack 5, and the operation device 6 is configured by a personal computer 6a or the like so that they can communicate with each other at a predetermined cycle. It is connected by a LAN (Ethernet, registered trademark of Xerox Corporation) 4b.

  The operation device 6 is installed with a simulation program for operation and display that operates under a predetermined operating system (hereinafter abbreviated as “OS”), and via a GUI (Graphical User Interface) incorporated in the OS. An input / output device 6b such as a monitor, a keyboard and a mouse on which an operator inputs an operation or displays a simulation result is connected.

  By executing the simulation program, input / output signal definition information exchanged between the simulation apparatus 1 and the control apparatus 7, model calculation conditions in the model calculation section 2, signal measurement conditions in the signal measurement section 3, etc. Operation of environment setting unit 60 for setting environmental conditions for simulation, measurement signal display processing unit 61 for receiving measurement data output from signal measurement unit 3 and displaying it on a monitor, and operation of model calculation unit 2 and signal measurement unit 3 A model control unit 62 is configured to control the above.

  The signal processing board described above is exchanged between the motherboard 5a on which the main CPU is mounted, a plurality of input / output conversion boards 5b connected to the motherboard 5a via the PCI bus, the input / output conversion board 5b, and the control device 7. A plurality of signal relay boards 5c for relaying the input / output signal lines are provided, and are connected to the control device 7 by the harness 4a via the signal relay board 5c.

  The memory mounted on the motherboard 5a stores the OS and a simulation program that operates based on the OS. The motherboard 5a, the input / output conversion board 5b, and the signal relay that operate when the simulation program is executed under the OS. The above-described model calculation unit 2 and signal measurement unit 3 are configured by the board 5c.

  On the mother board 5a, a model program that simulates the engine operation, which is a part of the simulation program, is executed, and various simulation signals output to the engine control device (hereinafter referred to as "control device") 7 are displayed as "presence / absence of output". ”,“ Size ”,“ cycle ”, and other logical characteristic data are generated and output to the input / output conversion board 5b via the PCI bus. In other words, the model program is a program that executes predetermined calculations based on input data and generates and outputs predetermined output data. For example, when an engine speed is input, the model program converts the engine speed into a crank pulse signal. In this program, pulse frequency data corresponding to the rotational speed is output, and when throttle operation data is input, corresponding throttle opening data is output.

  An FPGA, which is a programmable logic circuit, is mounted on the input / output conversion board 5b, and a physical simulation signal is generated based on characteristic data of the simulation signal input to the FPGA register. For example, when a simulated crank pulse signal is output by simulating a crank pulse signal output from the engine, the mother crank 5a outputs “whether or not to output” the simulated crank pulse based on the rotational speed data input from the operating device 6. And logical characteristic data such as “size” and “period” are generated, and in the input / output conversion board 5b, a pulse signal corresponding to the logical characteristic data is generated and output to the signal relay board 5c.

  The signal relay board 5c is provided with an interface switching section for individually switching the input / output signal to / from the control device 7, that is, the signal path, voltage level, impedance, and other signal forms, from the input / output conversion board 5b. The input simulated crank pulse passes through the set signal path, and the voltage level, impedance, and the like for the control device 7 are matched and output. Therefore, the interface switching unit is provided with a switch circuit that switches and sets signal paths, a level switching circuit that switches signal levels, a switching circuit that pulls up and pulls down signals, and the like.

  The control signal output from the control device 7 is matched in voltage level, impedance, etc. by the signal relay board 5c, output to the input / output conversion board 5b through the set signal path, and provided in the input / output conversion board 5b. The control signal is measured by a signal detection circuit such as a clock circuit, a counter circuit, a pulse detection circuit, etc. Characteristic data is generated.

  The characteristic data generated by the input / output conversion board 5b is buffered in the memory on the FPGA and output to the motherboard 5a via the PCI bus. In the motherboard 5a, the measurement data input from the input / output conversion board 5b is stored in the memory, and is output to the operation device 6 via the LAN at a predetermined cycle.

  In the operation device 6, the measurement data input from the motherboard 5 a is stored in the memory, the control signal is displayed as a trend graph on the monitor based on the history of the stored measurement data, and the operator visually checks the control signal. It is configured so that it can be confirmed.

  That is, the input / output signal definition information described above is the path information and signal form definition information in the signal relay board 5c, and the data definition information exchanged between the operating device 6, the model calculation unit 2, and the signal measurement unit 3. The model calculation condition is an input / output condition for the model calculation such as the engine speed data described above. The signal measurement condition is a measurement target of the control signal input from the control device 7, a sampling timing, and the like. This is definition information of measurement data.

  Such environment setting information is transmitted from the environment setting unit 6a to the boards 5b and 5c via the mother board 5a based on the operation input of the operator, and after the simulation environment is prepared, the model control unit 6c performs execution control of the simulation. Then, the data measured at that time is subjected to display processing by the measurement signal display processing unit 6b.

  Hereinafter, as an example of the operation of the simulation device 1 described above, a crank pulse signal, which is a simulation signal, is output from the model calculation unit 2 to the control device 7, and an ignition signal and an injection signal to be output from the control device 7 are signal measurement units. The operation measured and displayed on the operating device 6 will be described with reference to the flowcharts shown in FIGS. 3 and 7 and FIGS. 4 to 6.

  As shown in FIG. 3, when the simulation apparatus 1 is turned on, the OS is activated to perform initial setting, and a simulation program as an application is activated (SA1, SB1, SC1). An environment setting screen is displayed on the display unit of the controller device 6 by the environment setting unit 60 (SA2), and the above-described environment setting is performed by the operator.

  When the setting is completed (SA3), the set environment information is transmitted from the operating device 6 to the model calculation unit 2 and the signal measurement unit 3 via the LAN 4b (SA4), and the model calculation unit 2 defines the input / output signal definition information, The environment is set based on the model calculation conditions, and the signal measurement unit 3 sets the environment based on the input / output signal definition information and the signal measurement conditions (SB2, SC2).

  Here, the engine speed, the engine stop determination time, the timing and pulse width of the fail signal output in response to the ignition signal and the injection signal input from the control device 7 are set as model calculation conditions, and signal measurement is performed. The crank angle range that is the measurement timing of the ignition signal and the injection signal output from the control device 7 as the condition (in FIG. 4, “measurement parameter”), when each signal is missing, and when the engine is stopped Pseudo measurement data (indicated as “instruction value” in FIG. 4) and the like are set.

  When a simulation start operation is performed by the operator (SA5), a simulation start command is transmitted from the operating device 6 to the model calculation unit 2 and the signal measurement unit 3 by the model control unit 62 (SA6). The model calculation unit 2 starts the engine model calculation (SB3), and a simulated crank pulse is output to the control device 7 based on the input rotation speed (SB4) (see FIG. 4).

  As shown in FIG. 5, the engine speed can be set in a range from 30000 rpm to −30000 rpm by operator setting, and the crank pulse corresponding to the set engine speed is 0.0 ° CA (CA represents the crank angle). To 719.9 ° CA, pulses in increments of 0.1 ° CA are output. During forward rotation, pulses from 0.0 ° CA to 719.9 ° CA are output, and during reverse rotation, pulses from 719.9 ° CA to 0.0 ° CA with reversed phases are output.

  The signal measurement unit 3 measures a control signal output from the control device 7, here an ignition signal and an injection signal (SC3), generates measurement data, and outputs the measurement data to the model calculation unit 2 and the operation device 6 (SC4). . When the ignition signal and the injection signal are not measured, pseudo measurement data is generated and output (SC4).

  The measurement of the ignition signal will be described in detail below. Since the same processing is performed for the injection signal, it will not be described in detail here.

  As shown in FIGS. 5 and 6, the signal measurement unit 3 measures the simulated crank pulse input from the model calculation unit 2 with a counter circuit and monitors the crank angle, while setting the crank angle range set by the environment information. It is monitored whether or not the ignition signal and the injection signal are detected at (measurement timing), and when the ignition signal and the injection signal are detected in a steady state in which a normal rotation simulated crank pulse is output, Characteristic data including a crank angle corresponding to the off edge and a crank angle corresponding to the pulse width from the on edge to the off edge is generated as measurement data.

  FIG. 6 schematically shows how ignition signals are output from cylinder # 1 to cylinder # 4 for a four-cylinder four-cycle engine, and the simulated crank pulse is simplified unlike the actual one. It is described.

  As shown in FIG. 7, the signal measuring unit 3 receives a signal indicating the engine rotation state from the model calculation unit 2, such as an engine rotation number signal, a signal indicating direct rotation / stop / reverse rotation of the engine, and engine rotation. As a state, a signal indicating whether the state is normal or abnormal (reverse rotation state) is input (SD1), and an ignition signal from the control device 7 is measured (SD2). When it is determined that the engine is rotating forward based on the signal indicating the engine rotation state (SD3), when the ignition signal is detected at the set measurement timing (SD4), the on-edge, off-edge, and pulse width of the ignition signal are measured. Then, the corresponding crank angle is generated as measurement data, updated and stored in the measurement data storage area partitioned in the memory on the FPGA, and the measurement data is output to the mother board 5a (SD5).

  Although not shown in the figure, when the ignition signal cannot be detected at the set measurement timing in step SD4, the crank angle set to 720 ° CA corresponding to the on-edge and off-edge (a value that is not possible in practice). And 0 ° CA is generated as the pulse width, and is updated and stored in the measurement data storage area partitioned in the memory on the FPGA.

  When it is determined that the engine is stopped based on the signal indicating the engine rotation state (SD6), the engine waits for the stop determination time to elapse (SD7), and when the ignition signal is detected after elapses (SD8), Measurement data storage area partitioned into a memory on the FPGA by measuring the on-edge, off-edge, and pulse width of the ignition signal and generating corresponding crank angles (here, the crank angle immediately before stopping) as measurement data And the measurement data is output to the mother board 5a (SD9). When an ignition signal is not detected (SD8), preset pseudo measurement data, here, a crank angle of 720 ° CA set to correspond to the on-edge and off-edge (a value that is impossible in practice), and a pulse 0 ° CA is generated as the width, updated and stored in the measurement data storage area partitioned in the memory on the FPGA, and the measurement data is output to the mother board 5a (SD10). The stop determination time is provided in order to improve the determination accuracy, and the stop determination time may be determined immediately without providing the stop determination time.

  While waiting for the elapse of the stop determination time (SD7), when an ignition pulse from the control device 7 is detected (SD11), it is determined as an abnormal ignition signal, and the crank angle corresponding to the on-edge and off-edge at that time, A crank angle corresponding to the pulse width from the on-edge to the off-edge is generated, stored in the abnormal measurement data storage area partitioned in the memory on the FPGA, and the measurement data is output to the mother board 5a (SD12). In this case, a crank angle of 0 ° CA and a pulse width of 0 ° CA are generated corresponding to the on-edge and off-edge.

  When data is stored in the abnormal measurement data storage area, abnormal measurement data is output instead of pseudo measurement data. That is, as shown in FIG. 4, when the signal measurement unit 3 determines that the engine is in a stopped state based on a signal indicating the engine rotation state, when the control signal is input from the control device 7, the pseudo measurement data Instead, a measurement data output switching unit 3a that outputs measurement data for the control signal is provided.

  When it is determined that the engine is rotating in reverse based on the signal indicating the engine rotation state (SD6), as in step SD8, when no ignition signal is detected (SD13), preset pseudo measurement data, here Then, the crank angle 720 ° CA (which is actually impossible) set in correspondence with the on-edge and off-edge, and 0 ° CA as the pulse width are generated, and the measurement data partitioned into the memory on the FPGA The storage data is updated and stored, and the measurement data is output to the mother board 5a (SD15).

  When the ignition signal is detected in step SD13, it is determined that it is an abnormal ignition signal, and a crank angle corresponding to the on-edge and off-edge at that time and a crank angle corresponding to the pulse width from the on-edge to the off-edge are generated. Then, the data is stored in the abnormal measurement data storage area partitioned into the memory on the FPGA, and the measurement data is output to the mother board 5a (SD12). In this case, a crank angle of 0 ° CA and a pulse width of 0 ° CA are generated corresponding to the on-edge and off-edge.

  As described above, the signal measuring unit 3 is based on the signal indicating the engine rotation state other than the simulated crank pulse signal output from the model calculation unit 2 to the control device 7 and indicating the engine rotation state capable of identifying the normal rotation / stop / reverse rotation. The rotation state can be identified instantly and accurately, when the ignition signal and the injection signal are not measured in the crank angle range set in the environment information in the normal rotation state, the previous measurement data is not output as it is, Since the pseudo measurement data is output after being switched, the operator can easily determine whether or not the ignition signal and the injection signal are normally output.

  In addition, when the ignition signal and the injection signal are not output from the control device 7 in the stop state or the reverse rotation state (not output when the control device 7 is operating normally), the previous measurement data is output as it is. Instead, the measurement data is switched to the pseudo measurement data and output, and when the ignition signal and the injection signal are output from the control device 7, the measurement data output switching unit outputs the abnormal measurement data instead of the pseudo measurement data. Therefore, the operator can easily determine whether or not the ignition signal and the injection signal are output abnormally.

  Here, the pseudo measurement data can be appropriately set as long as it is data that can be identified whether or not the data is originally output from the control device 7. That is, as the pseudo measurement data output from the signal measurement unit, a value that cannot be obtained by measurement data based on the measured engine control signal is adopted in order to facilitate the operator's judgment.

  As described above, the measurement data output to the model computation unit 2 is stored in the memory of the motherboard 5a via the PCI bus, and the measurement data generated by the input / output conversion board 5b and buffered in the memory on the FPGA. The measurement data is output to the controller device 6 by being transmitted from the motherboard 5a via the LAN 4b.

  Returning to FIG. 3, when the measurement data of the ignition signal or the injection signal is input, the model calculation unit 2 generates a corresponding simulated fail signal for the abnormality detection by the control device 7 (SB5), and the control device 7 (SB6)

  In the operating device 6, when measurement data of an ignition signal or an injection signal is input (SA7), the measurement signal display processing unit 61 displays the data together with past measurement data as a trend graph on the display unit (SA8).

  In this way, steps SA7 to SA8 are repeated in the operating device 6 until the end operation is performed by the operator, steps SB3 to SB6 are repeated in the model calculation unit 2, and steps SC3 to SC4 are repeated in the signal measurement unit 3. .

  When the termination operation is performed (SA9), the model control unit 62 transmits a termination command to the model calculation unit 2 and the signal measurement unit 3 (SA10), and the model calculation unit 2 and the signal measurement unit 3 that have received the termination command are The process ends (SB7, SC5).

  Another embodiment will be described below. In the above-described embodiment, the signal measuring unit 3 inputs the simulated crank pulse output from the model calculating unit 2 and grasps the crank angle, but shows the engine rotation state input from the model calculating unit 2. The signal is not limited to the simulated crank pulse, and may be another signal or data. For example, the rotation speed information and the crank angle information may be directly input, and the crank angle information is input from the model calculation unit 2 at the first timing of one cycle, and the signal measurement unit 3 is internally used as a trigger. The crank angle may be counted using

  In the above-described embodiment, an example in which the simulated crank pulse is a continuous pulse is shown, but a simulated crank pulse having a missing tooth may be used. In any case, if the control device 7 needs another simulation signal, for example, a simulation signal such as a cam signal for the valve drive shaft, for cylinder discrimination, It is appropriately generated by the model calculation unit 2.

  In the embodiment described above, the crank pulse is exemplified as the simulation signal, and the ignition signal and the injection signal output from the control device in response to the crank pulse are described. However, the simulation signal and the measurement signal according to the present invention are Needless to say, the present invention is not limited to such a signal, and can be widely applied to measuring a control signal output from a control device in response to some simulation signal.

  In other words, a simulation calculation unit that simulates the engine and outputs an engine state signal representing the state of the engine to the engine control device, and measurement data based on the engine control signal measured from the engine control signal input from the engine control device A signal measuring unit for outputting the signal, wherein the signal measuring unit measures the engine control when the rotational state of the engine simulated by the simulation computing unit is a normal rotational state. The measurement data based on the signal is output, and when the engine rotation state simulated by the simulation calculation unit is at least one of the stop state and the reverse rotation state, the preset pseudo measurement data is output. Preferably, it is configured.

  In addition, when the control signal is input from the control device when the simulation signal is in the stop state or the reverse rotation state, the signal measurement unit outputs measurement data for the control signal instead of the pseudo measurement data. It is desirable to have a measurement data output switching unit.

  In the above-described embodiment, the model calculation unit and the signal measurement unit have been described as being configured by a plurality of signal processing boards including the mother board 5a, the input / output conversion board 5b, and the signal relay board 5c. The specific configuration of the signal measuring unit is not limited to this, and can be appropriately configured as long as the function of the present invention is realized. For example, the signal measuring unit is configured on a single signal processing board. It may be.

  The embodiment described above describes an example for realizing the present invention, and the specific configuration of each part should be appropriately changed and designed according to the system to be constructed as long as the effects of the present invention are achieved. Is possible.

Hardware configuration diagram of the simulation device Functional block diagram of the simulation device Flow chart showing simulation operation Functional block diagram of the signal measurement unit Explanatory drawing which shows the update timing of the measurement data updated by the simulation signal produced | generated by a model calculating part and signal measurement Timing chart of ignition signal measured by signal measuring unit Flow chart showing measurement operation by signal measurement unit

Explanation of symbols

1: Simulation device 2: Model calculation unit 3: Signal measurement unit 4a: Harness 4b: LAN
5: I / O devices (display, monitor, mouse, and keyboard)
4a: LAN
4b: Harness 5: Rack 5a: Motherboard 5b: Input / output conversion board 5c: Signal relay board 6: Operating device 60: Environment setting unit 61: Measurement signal display processing unit 62: Model control unit

Claims (5)

A simulation operation unit that simulates the engine and outputs an engine state signal representing the state of the engine to the engine control device, and measures the engine control signal input from the engine control device and outputs measurement data based on the engine control signal A simulation device comprising a signal measuring unit for performing
The signal measurement unit outputs measurement data based on the measured engine control signal when the engine rotation state simulated by the simulation calculation unit is a normal rotation state, and the simulation calculation unit simulates A simulation device that outputs preset pseudo measurement data when the engine is in at least one of a stopped state and a reversely rotated state.   When the engine control signal is input from the engine control device when the engine measurement state simulated by the simulation calculation unit is at least one of a stop state and a reverse rotation state, The simulation apparatus according to claim 1, wherein measurement data based on the measured engine control signal is output.   3. The simulation apparatus according to claim 1, wherein the pseudo measurement data output by the signal measurement unit is a value that cannot be obtained by measurement data based on the measured engine control signal.   The signal measurement unit outputs pre-set pseudo measurement data when a predetermined time has elapsed since the rotation state of the engine simulated by the simulation calculation unit has stopped. The simulation apparatus in any one. A simulation calculation unit that simulates a control target and outputs a state signal representing the state of the control target to the control target control device, measures a control signal input from the control device, and outputs measurement data based on the control signal A simulation device comprising a signal measuring unit for performing
The signal measurement unit outputs measurement data based on the measured control signal when the state of the control target simulated by the simulation calculation unit is a normal state, and the control simulated by the simulation calculation unit A simulation device that outputs preset pseudo measurement data when the target state is an abnormal state.