CN113609710A - Power simulation method, power chassis simulation system and vehicle body area test system - Google Patents
Power simulation method, power chassis simulation system and vehicle body area test system Download PDFInfo
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Abstract
The application discloses a power simulation method, a power chassis simulation system and a vehicle body area test system, wherein the power simulation method comprises the following steps: the automatic gearbox control simulation module simulates current gear information and sends the current gear information to the bus; the gear shifting control unit acquires gear shifting operation information on a vehicle body area and sends the gear shifting operation information to the bus; the vehicle body electronic stability control simulation module simulates the current vehicle speed and the current brake switch information and sends the current vehicle speed and the current brake switch information to the bus; the gear shifting execution controller simulation module judges whether the gear shifting operation meets the gear shifting requirement or not according to the current vehicle speed and the current brake switch information; if the gear shifting requirement is met, the gear shifting execution controller simulation module calculates a target gear according to the current gear information and the gear shifting operation information, and simulates the target gear information to be sent to the bus; and the automatic gearbox control simulation module switches gears according to the target gear information. The construction of a rack test system is simplified, and the effectiveness and timeliness of the electric function test of the vehicle body area are improved.
Description
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a power simulation method, a power chassis simulation system, and a vehicle body area test system.
Background
With the rapid development of automobile electrification intellectualization, a sofa plus four wheels is used for describing that the existing automobile manufacturing technology is obviously out of date, how to increase the experience of a user becomes the important factor of each automobile enterprise, and an automobile body domain which is most directly interacted with the user is the direct consideration of an automobile enterprise, so that a complete and reliable test system and a method are needed in the face of more humanized, intelligent and complicated automobile body domain control.
The bench test is a technology widely used in the automobile industry at present for testing the performance and the function of each controller in an automobile body area, and mainly comprises an electrical function test, an electrical performance test, a network dormancy test, a diagnosis test and a robustness test.
For a pure electric vehicle, the existing bench test system needs to be matched with a power battery platform which is complex and occupies a large area, so that the system is difficult to integrally build, complex to maintain and needs to occupy large manpower and material resources, and the test effectiveness and timeliness of the test cannot be better met for testing the key body domain electric functions; for the traditional fuel vehicle, the power chassis system of the automobile cannot be matched with the body area independently.
Disclosure of Invention
The application provides a power simulation method, a power chassis simulation system and a vehicle body domain test system, the independent power chassis simulation system matched with a vehicle body domain is arranged, the construction of a bench test system is simplified, and the effectiveness and timeliness of electrical function test of the vehicle body domain are improved.
The application provides a dynamic simulation method, which comprises the following steps:
the automatic gearbox control simulation module simulates current gear information and sends the current gear information to the bus;
the gear shifting control unit acquires gear shifting operation information on a vehicle body area and sends the gear shifting operation information to the bus;
the vehicle body electronic stability control simulation module simulates the current vehicle speed and the current brake switch information and sends the current vehicle speed and the current brake switch information to the bus;
the gear shifting execution controller simulation module judges whether the gear shifting operation meets the gear shifting requirement or not according to the current vehicle speed and the current brake switch information;
if the gear shifting requirement is met, the gear shifting execution controller simulation module calculates a target gear according to the current gear information and the gear shifting operation information, and simulates the target gear information to be sent to the bus;
and the automatic gearbox control simulation module switches gears according to the target gear information.
Preferably, the judging whether the shift operation meets the shift request includes:
and judging whether the brake is stepped according to the brake switch information, if not, the gear shifting operation does not meet the gear shifting requirement.
Preferably, the judging whether the shift operation meets the shift requirement further includes:
and judging whether the current vehicle speed is greater than a threshold value, if so, the gear shifting operation does not meet the gear shifting requirement.
Preferably, if the gear shifting operation does not meet the gear shifting requirement, the gear shifting execution controller simulation module sends the abnormal prompt information to the bus;
and the instrument control module displays the abnormal prompt information.
The application also provides a power chassis simulation system which comprises a bus, an automatic gearbox control simulation module, a vehicle body electronic stability control simulation module and a gear shifting execution controller simulation module;
the automatic gearbox control simulation module is used for simulating current gear information, sending the current gear information to the bus, and switching gears according to target gear information;
the vehicle body electronic stability control simulation module is used for simulating the current vehicle speed and the current brake switch information and sending the current vehicle speed and the current brake switch information to the bus;
and the gear shifting execution controller simulation module judges whether the gear shifting operation meets the gear shifting requirement according to the current vehicle speed and the current brake switch information, calculates a target gear according to the current gear information and the gear shifting operation information, and simulates the target gear information to be sent to the bus.
Preferably, the engine management simulation module is further included and is used for simulating the engine speed and the engine water temperature.
Preferably, the electric power steering simulation module is further included, and is used for simulating steering wheel rotation angle and steering torque.
Preferably, the vehicle collision warning system further comprises an airbag simulation module, wherein the airbag simulation module is used for simulating a vehicle collision signal.
The application also provides a vehicle body area testing system which comprises an upper computer, a lower computer, a testing rack and an external power supply;
the lower computer comprises the power chassis simulation system;
the test bench includes the automobile body field, and the automobile body field includes shift control unit, and shift control unit and bus connection.
Preferably, the vehicle body area further comprises an instrument control module, and the instrument control module is connected with the bus.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is an architectural diagram of a body area testing system provided herein;
FIG. 2 is a simulation node structure diagram of the power chassis simulation system provided by the present application;
FIG. 3 is a shift logic diagram of the power simulation method provided herein;
fig. 4 is a flowchart of a power simulation method provided in the present application.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The application provides a power simulation method, a power chassis simulation system and a vehicle body domain test system, the independent power chassis simulation system matched with a vehicle body domain is arranged, the construction of a bench test system is simplified, and the effectiveness and timeliness of electrical function test of the vehicle body domain are improved.
As shown in fig. 1, the body area test system provided by the present application includes an upper computer 110, a lower computer 120, a test bench 130, and an external power supply 140.
The upper computer 110 and the lower computer 120 adopt an ethernet protocol and are directly connected by using a network cable. The lower computer 120 and the test bench 130 communicate with each other through a bus to perform parameter control and communication between systems. An external power supply 140 is connected to the test rig 130 via a cable to provide a controllable power supply to the test rig 130.
The upper computer 110 is used as an interactive window between a tester and a test system, and mainly realizes two functions, namely, inputting control simulation parameters to the test system through a CANoe Panel and simulating a test environment; and secondly, monitoring the bus message, reflecting the test condition and result and monitoring the state information in the test process.
The lower computer 120 includes a virtual power chassis simulation system 1201 that runs the power chassis simulation system 1201. As shown in fig. 2, the power chassis simulation system 1201 includes a bus, an automatic Transmission Control Unit (TCU) simulation module, an ACM (Action Control module) simulation module, and an ESC (Electronic Stability Controller) simulation module.
Preferably, the Power chassis simulation System 1201 further includes nodes such as an Engine Management System (EMS) simulation module, an Electric Power Steering (EPS) simulation module, and an airbag (SRS) simulation module. The GW route, the GSM shifting module and the ICM meter control module are real nodes.
The TCU simulation module is a virtual node and is used for simulating current gear information, sending the current gear information to the bus and switching gears according to target gear information. The TCU sends the current gear information to the bus and the gear is P, R, N, D, M. The TCU also replaces the current gear information with the target gear information calculated by the ACM to complete one-time gear shifting operation.
The ESC simulation module is a virtual node and is used for simulating the current vehicle speed and the current brake switch information and sending the current vehicle speed and the current brake switch information to the bus. Referring to fig. 3, as an embodiment, an ESC simulation module, a TCU simulation module, a GSM simulation module, and an ACM simulation module are all connected to a bus 1, an ICM is connected to a bus 2, and a GW is disposed between the bus 1 and the bus 2.
The ACM simulation module is a virtual node, judges whether the gear shifting operation meets the gear shifting requirement according to the current vehicle speed and the current brake switch information, calculates a target gear according to the current gear information and the gear shifting operation information if the gear shifting operation meets the gear shifting requirement, and simulates the target gear information to be sent to a bus; and if the gear shifting requirement is not met, stopping the calculation of the target gear, and sending abnormal prompt information to the bus, so that the instrument control module displays the abnormal prompt information.
The EMS simulation module is used for simulating the rotating speed of the engine and the water temperature of the engine. The EPS simulation module is used for simulating steering wheel turning angles and steering torques. The SRS simulation module is used for simulating a vehicle collision signal.
The ESC simulation module, the EMS simulation module, the EPS simulation module and the SRS simulation module are related to controls on the CANoe Panel through DBC files added in engineering, and simulation of the corresponding modules is achieved.
Test bench 130 includes the automobile body field, and the automobile body field includes controller, pencil, hardware and rack frame, mainly has: the system comprises an external light system, a wiper system, a door and window lock system, an internal light system, an anti-theft alarm system, a PEPS system, an auxiliary system, an air conditioning system and the like, and the systems can be added or deleted according to specific test conditions and test environments.
The automobile body still includes shift control unit GSM, and shift control unit GSM is connected with the bus. The gear shifting control unit GSM is a real node on a vehicle body domain, and has the function of sending corresponding gear shifting operation information to the bus according to the gear shifting operation of a tester.
As one example, the shift operation information includes left-hand 3, left-hand 2, left-hand 1, hold, right-hand 1, right-hand 2, right-hand 3, and pressing the P key. If the signal does not change within 200ms, the shift operation information is reset to the "hold" state.
The body domain also includes an Instrument Control Module (ICM) that is connected to the bus. The ICM is a real node, and receives the abnormal prompt information sent by the ACM to prompt a tester that the gear shifting operation does not meet the gear shifting requirement. The abnormal prompt information comprises: please engage the P-gear when stationary, please park and shift gears, please step on the brake when shifting gears, etc. The ICM also displays the current gear information of the vehicle according to the current gear information sent by the TCU simulation module.
It is understood that a Gateway (GW) is also included in the bus network system. GW is a real node, whose function is to complete routing of messages and signals on both buses.
The external power supply 140 mainly comprises a programmable power supply 1402 and a power supply industrial personal computer 1401, wherein the power supply industrial computer 1401 can control the programmable power supply 1402 to input a controllable power supply to the test bench 130, specifically can control the power supply voltage, the output time and the dynamic control, and meets the performance test conditions of static current test, high-low voltage test, loop voltage drop test and the like of the test bench 130.
Based on the vehicle body area testing system, the application also provides a dynamic simulation method. The simulation of the real-time gear change of the vehicle is realized by utilizing the TCU simulation module, the ACM simulation module, the ESC simulation module and the real node GSM.
With reference to fig. 3 and 4, the dynamic simulation method includes the following steps:
s410: and the TCU simulation module simulates the current gear information and sends the current gear information to the bus.
S420: and the GSM collects the gear shifting operation information on the vehicle body domain and sends the gear shifting operation information to the bus.
S430: and the ESC simulation module simulates the current vehicle speed and the current brake switch information and sends the current vehicle speed and the current brake switch information to the bus.
S440: the ACM simulation module acquires the current vehicle speed and the current brake switch information from the bus, and judges whether the gear shifting operation meets the gear shifting requirement or not according to the current vehicle speed and the current brake switch information. If yes, executing S450; otherwise, S480 is executed.
Specifically, determining whether the shift operation meets a shift requirement includes:
judging whether the brake is stepped according to the brake switch information, if not, the gear shifting operation does not accord with the gear shifting requirement, and sending an abnormal prompt message by the ACM simulation module: please step on the brake during shifting.
Judging whether the current vehicle speed is greater than a threshold value, if so, judging that the gear shifting operation does not meet the gear shifting requirement, and sending abnormal prompt information by an ACM simulation module: please park the shift.
It will be appreciated that the shift demand is different in different gear shifting operations, and therefore the shift demand is not limited to only the two requirements described above.
S450: the ACM simulation module acquires current gear information and gear shifting operation information from the bus, calculates a target gear according to the current gear information and the gear shifting operation information, and simulates the target gear information and sends the target gear information to the bus.
S460: and the TCU simulation module switches gears according to the target gear information.
S470: the ICM displays the new gear information.
S480: and the ACM simulation module sends the abnormal prompt information to the bus.
S490: the ICM displays an exception alert.
As an example, table 1 shows a shift operation, and table 2 shows shift requests corresponding to a part of the shift operation.
TABLE 1
TABLE 2
Based on the above table, as an embodiment, if the current gear is N gear, GSM left-hand 1 grid is operated, and the shift process is as follows:
and the TCU simulation module sends that the current gear is N gear and operates the real node GSM to rotate left by one grid. The ACM simulation module firstly judges whether the brake is pressed according to the brake switch information sent by the ESC simulation module. If not, the ACM simulation module sends an abnormal prompt message: please step on the brake during shifting; if the brake is stepped on, the ACM simulation module judges whether the vehicle speed is greater than 10Km/h according to the vehicle speed information sent by the ESC. If the vehicle speed is greater than 10Km/h, the ACM simulation module sends an abnormal prompt message: please stop the vehicle and shift gears; and if the vehicle speed is less than or equal to 10Km/h, the ACM simulation module calculates that the target gear is the R gear and sends the target gear information to the bus. And after the TCU simulation module acquires the target gear information, the current gear is replaced by an R gear from an N gear, and one-time gear shifting operation is completed.
As another embodiment, if the current gear is the R gear, GSM is operated to press the P key, and the shift process is as follows:
and the TCU simulation module sends that the current gear is the R gear, and operates the real node GSM to press the P key. The ACM simulation module firstly judges whether the brake is pressed or not according to the brake switch information sent by the ESC. If not, the ACM simulation module sends an abnormal prompt message: please step on the brake during shifting; if the brake is stepped on, the ACM simulation module judges whether the vehicle speed is greater than 3Km/h according to the vehicle speed information sent by the ESC. If the vehicle speed is greater than 3Km/h, the ACM simulation module sends an abnormal prompt message: please engage the P gear when stationary; and if the vehicle speed is less than or equal to 3Km/h, the ACM simulation module continues to calculate to obtain that the target gear is P gear, and the target gear information is sent to the bus. And the TCU simulation module replaces the current gear from the R gear to the P gear after obtaining the target gear information from the bus, and finishes one-time gear shifting operation.
The beneficial effect of this application is as follows:
1. according to the power chassis simulation system, the wiring harness, hardware and maintenance cost required by bench testing are reduced through the independent power chassis simulation system, and required human and material resources are greatly liberated.
2. The simulation of the power chassis system by the independent power chassis simulation system solves the problem that the bench test cannot be limited in testing in a dynamic environment, and widens the bench test range and effectiveness.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A method of dynamic simulation, comprising:
the automatic gearbox control simulation module simulates current gear information and sends the current gear information to the bus;
the gear shifting control unit acquires gear shifting operation information on a vehicle body area and sends the gear shifting operation information to the bus;
the vehicle body electronic stability control simulation module simulates the current vehicle speed and the current brake switch information and sends the current vehicle speed and the current brake switch information to the bus;
the gear shifting execution controller simulation module judges whether the gear shifting operation meets the gear shifting requirement or not according to the current vehicle speed and the current brake switch information;
if the gear shifting requirement is met, the gear shifting execution controller simulation module calculates a target gear according to the current gear information and the gear shifting operation information, and simulates target gear information to be sent to a bus;
and the automatic gearbox control simulation module switches gears according to the target gear information.
2. The power simulation method according to claim 1, wherein the determining whether the shift operation meets a shift requirement comprises:
and judging whether the brake is stepped according to the brake switch information, if not, the gear shifting operation does not meet the gear shifting requirement.
3. The power simulation method according to claim 1 or 2, wherein the determining whether the shift operation meets a shift requirement further comprises:
and judging whether the current vehicle speed is greater than a threshold value, if so, the gear shifting operation does not meet the gear shifting requirement.
4. The power simulation method according to claim 1, wherein if the shift operation does not meet the shift requirement, the shift execution controller simulation module sends an abnormal prompt message to the bus;
and the instrument control module displays the abnormal prompt information.
5. A power chassis simulation system is characterized by comprising a bus, an automatic gearbox control simulation module, a vehicle body electronic stability control simulation module and a gear shifting execution controller simulation module;
the automatic gearbox control simulation module is used for simulating current gear information, sending the current gear information to the bus, and switching gears according to target gear information;
the vehicle body electronic stability control simulation module is used for simulating the current vehicle speed and the current brake switch information and sending the current vehicle speed and the current brake switch information to the bus;
and the gear shifting execution controller simulation module judges whether the gear shifting operation meets the gear shifting requirement according to the current vehicle speed and the current brake switch information, calculates a target gear according to the current gear information and the gear shifting operation information, and simulates target gear information to be sent to the bus.
6. The power chassis simulation system of claim 5, further comprising an engine management simulation module for simulating engine speed, engine water temperature.
7. The power chassis simulation system of claim 5, further comprising an electric power steering simulation module for simulating steering wheel angle, steering torque.
8. The power chassis simulation system of claim 5, further comprising an airbag simulation module for simulating a vehicle crash signal.
9. A vehicle body area test system is characterized by comprising an upper computer, a lower computer, a test bench and an external power supply;
the lower machine comprising the power chassis simulation system of claims 5-8;
the test bench includes the automobile body field, the automobile body field includes the shift control unit, the shift control unit is connected with the bus.
10. The body area testing system of claim 9, wherein the body area further comprises an instrument control module, the instrument control module being connected to a bus.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114384820A (en) * | 2021-11-30 | 2022-04-22 | 重庆长安汽车股份有限公司 | Automatic driving algorithm simulation test system and method based on cloud rack |
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| 李顶根;曹晶;资小林;张杰;: "车辆底盘CAN总线系统的数字仿真及硬件实现", 华中科技大学学报(自然科学版), no. 01, pages 54 - 57 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114384820A (en) * | 2021-11-30 | 2022-04-22 | 重庆长安汽车股份有限公司 | Automatic driving algorithm simulation test system and method based on cloud rack |
| CN114384820B (en) * | 2021-11-30 | 2023-12-22 | 重庆长安汽车股份有限公司 | Cloud platform based automatic driving algorithm simulation test system and method |
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