CN113609710B - Power simulation method, power chassis simulation system and vehicle body domain test system - Google Patents
Power simulation method, power chassis simulation system and vehicle body domain test system Download PDFInfo
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- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The application discloses a power simulation method, a power chassis simulation system and a vehicle body domain 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 collects gear shifting operation information on a vehicle body domain 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 simulation module of the gear shifting execution controller judges whether gear shifting operation meets gear shifting requirements according to the current 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 a bus; the automatic gearbox control simulation module performs gear switching according to the target gear information. The construction of the bench test system is simplified, and the effectiveness and timeliness of the electric function test of the vehicle body domain are improved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a power simulation method, a power chassis simulation system and a vehicle body domain test system.
Background
With the rapid development of electrification intellectualization of automobiles, the technology of sofa and four wheels is used for describing how to increase the experience of users to be the focus of each automobile enterprise, and the automobile body domain which is most directly interacted with the users is a direct consideration of an automobile enterprise, and a set of perfect and reliable testing system and method are needed in the face of more humanized, intelligent and complicated automobile body domain control.
Bench test is a technology widely used in the automobile industry for testing the performance and the function of each controller in the automobile body domain, 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 with complex structure and large occupied area, so that the whole system is difficult to build, is complex to maintain, occupies large manpower and material resources, and can not better meet the test effectiveness and timeliness for testing important vehicle body domain electric functions; for the traditional fuel oil vehicle, the power chassis system of the vehicle cannot be independently matched with the vehicle body area.
Disclosure of Invention
The power simulation method, the power chassis simulation system and the vehicle body domain test system are provided with the independent power chassis simulation system matched with the vehicle body domain, so that the construction of the bench test system is simplified, and the effectiveness and timeliness of the vehicle body domain electrical function test are improved.
The application provides a power 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 collects gear shifting operation information on a vehicle body domain 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 simulation module of the gear shifting execution controller judges whether gear shifting operation meets gear shifting requirements according to the current 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 a bus;
the automatic gearbox control simulation module performs gear switching according to the target gear information.
Preferably, determining whether the shift operation meets the shift requirement includes:
judging whether the brake is stepped down according to the brake switch information, and if the brake is not stepped down, enabling the gear shifting operation to be not in accordance with the gear shifting requirement.
Preferably, determining whether the shift operation meets the shift requirement further includes:
and judging whether the current vehicle speed is greater than a threshold value, and if so, not conforming to the gear shifting requirement in the gear shifting operation.
Preferably, if the gear shifting operation does not meet the gear shifting requirement, the gear shifting execution controller simulation module sends abnormal prompt information to the bus;
the instrument control module displays 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 and 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 transmitting the current vehicle speed and the current brake switch information to the bus;
the simulation module of the gear shifting execution controller judges whether gear shifting operation meets the gear shifting requirement according to the current 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 used for simulating the engine speed and the engine water temperature.
Preferably, the electric power steering simulation module is further included, and the electric power steering simulation module is used for simulating steering wheel angles and steering torques.
Preferably, the vehicle collision simulation system further comprises an airbag simulation module for simulating a vehicle collision signal.
The application also provides a vehicle body domain 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 comprises a vehicle body domain, wherein the vehicle body domain comprises a gear shifting control unit, and the gear shifting control unit is connected with a bus.
Preferably, the body domain further comprises an instrument control module, and the instrument control module is connected with the bus.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a block diagram of a vehicle body domain testing system provided herein;
FIG. 2 is a schematic node block 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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
The power simulation method, the power chassis simulation system and the vehicle body domain test system are provided with the independent power chassis simulation system matched with the vehicle body domain, so that the construction of the bench test system is simplified, and the effectiveness and timeliness of the vehicle body domain electrical function test are improved.
As shown in fig. 1, the vehicle body domain testing system provided in the present application includes an upper computer 110, a lower computer 120, a testing stand 130, and an external power source 140.
The upper computer 110 and the lower computer 120 are directly connected by using a network cable by adopting an ethernet protocol. The lower computer 120 and the test bench 130 communicate with each other via a bus to perform parameter control and communication between systems. The external power source 140 is connected to the test bench 130 through a cable to provide a controllable power source to the test bench 130.
The upper computer 110 is used as an interaction 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 to simulate a test environment; and secondly, monitoring a bus message, reflecting test conditions and results, and monitoring 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 gearbox control (Transmission Control Unit, TCU) simulation module, a shift execution controller (Action control module, ACM) simulation module, and a body electronic stability control (Electronic Stability Controller, ESC) simulation module.
Preferably, the power chassis simulation system 1201 further includes nodes such as an engine management (Engine Management System, EMS) simulation module, an electric power steering (Electric Power Steering, EPS) simulation module, an airbag (Supplemental Restraint System, SRS) simulation module, and the like. The GW routing, the GSM gear shifting module and the ICM instrument control module are real nodes.
The TCU simulation module is a virtual node and is used for simulating current gear information and sending the current gear information to the bus, and gear switching is carried out according to target gear information. The TCU sends current gear information to the bus, and the gears are classified as P, R, N, D, M. The TCU also replaces the current gear information with target gear information calculated by the ACM, and one-time gear shifting operation is completed.
The ESC simulation module is a virtual node and is used for simulating the current speed and the current brake switch information and transmitting the current speed and the current brake switch information to the bus. As an embodiment, please refer to fig. 3, the esc simulation module, the TCU simulation module, the GSM simulation module, and the ACM simulation module are all connected to the bus 1, the ICM is connected to the 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 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 the bus; if the gear shifting requirement is not met, stopping target gear calculation, 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 engine speed and the engine water temperature. The EPS simulation module is used for simulating steering wheel rotation angle and steering torque. The SRS simulation module is used for simulating the vehicle collision signal.
ESC simulation module, EMS simulation module, EPS simulation module, SRS simulation module through the DBC file correlation CANoe Panel that the engineering added controls, realize the emulation of corresponding module.
The test rack 130 includes a body domain including a controller, a wire harness, hardware, and a rack frame, mainly: external lighting systems, wiper systems, door and window lock systems, internal lighting systems, burglar alarm systems, PEPS systems, auxiliary systems, air conditioning systems and the like can be added and deleted according to specific test conditions and test environments.
The vehicle body domain also comprises a gear shifting control unit GSM which is connected with the bus. The gear shifting control unit GSM is a real node on the car body domain, and has the function of sending corresponding gear shifting operation information to the bus according to 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, 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 further includes an instrument control module (Instrument Cluster Module, ICM) connected to the bus. The ICM is a real node, and the ICM receives 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: when the gear is still, the gear is hung in P gear, the gear is shifted when the gear is stopped, and the brake is stepped when the gear is shifted. The ICM also displays the current gear information of the vehicle according to the current gear information sent by the TCU simulation module.
It will be appreciated that a Gateway (GW) is also included in the bus network system. The GW is a real node and has the function of completing the routing of messages and signals on two 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 personal computer 1401 can control the programmable power supply 1402 to input a controllable power supply to the test bench 130, and specifically can control the power supply voltage, the output time and the dynamic control, so as to meet the electrical 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 domain test system, the application also provides a power simulation method. The simulation of the real-time gear conversion of the vehicle is realized by using a TCU simulation module, an ACM simulation module, an ESC simulation module and a real node GSM.
With reference to fig. 3 and 4, the power simulation method includes the steps of:
s410: the TCU simulation module simulates the current gear information and sends the current gear information to the bus.
S420: and the GSM acquires gear shifting operation information on the car body domain and sends the gear shifting operation information to the bus.
S430: the ESC simulation module simulates the current speed and the current brake switch information and sends the current speed and the current brake switch information to the bus.
S440: the ACM simulation module acquires the current speed and the current brake switch information from the bus, and judges whether the gear shifting operation meets the gear shifting requirement according to the current speed and the current brake switch information. If yes, then executing S450; otherwise, S480 is performed.
Specifically, determining whether the shift operation meets the shift requirement includes:
judging whether a brake is stepped down according to the brake switch information, if not, the gear shifting operation does not meet the gear shifting requirement, and the ACM simulation module sends abnormal prompt information: the shift requests to step on the brake.
Judging whether the current vehicle speed is greater than a threshold value, if so, enabling the gear shifting operation not to meet the gear shifting requirement, and sending abnormal prompt information by the ACM simulation module: please park the gear shift.
It will be appreciated that in different shift operations, the shift requirements are different and therefore are not limited to only the two requirements.
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 to be sent to the bus.
S460: the TCU simulation module performs gear switching according to the target gear information.
S470: the ICM displays new gear information.
S480: the ACM simulation module sends the abnormal prompt information to the bus.
S490: the ICM displays an abnormality prompt.
As an example, table 1 shows shift operations, and table 2 shows shift requirements corresponding to a part of the shift operations.
TABLE 1
TABLE 2
Based on the above table, as an embodiment, if the current gear is N gear, the GSM left-hand 1 grid is operated, and the shift flow is as follows:
the TCU simulation module sends the current gear to be the N gear, and operates a real node GSM left-hand one grid. The ACM simulation module firstly judges whether the brake is stepped down according to the brake switch information sent by the ESC simulation module. If the user does not step on, the ACM simulation module sends abnormal prompt information: a brake is stepped on when shifting gears; 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 abnormal prompt information: stopping the vehicle and shifting gears; if the speed of the vehicle 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. After the TCU simulation module acquires the target gear information, the current gear is replaced by the R gear from the N gear, and one-time gear shifting operation is completed.
As another embodiment, if the current gear is R gear, the GSM is operated to press the P key, and the shift flow is as follows:
the TCU simulation module sends the current gear to be the R gear, and the true node GSM is operated to press the P key. The ACM simulation module firstly judges whether the brake is stepped down according to the brake switch information sent by the ESC. If the user does not step on, the ACM simulation module sends abnormal prompt information: a brake is stepped on when shifting gears; if the brake is stepped down, 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 abnormal prompt information: hanging in a P gear when the user stands still; if the speed is less than or equal to 3Km/h, the ACM simulation module continues to calculate that the target gear is the P gear, and sends the target gear information to the bus. The TCU simulation module obtains target gear information from the bus and then replaces the current gear with the P gear from the R gear, so that one-time gear shifting operation is completed.
The beneficial effects of this application are as follows:
1. the wire harness, hardware and maintenance cost required by bench test are reduced through the independent power chassis simulation system, and the required manpower and material resources are greatly liberated.
2. According to the power chassis simulation system, the power chassis simulation system is simulated through the independent power chassis simulation system, the limitation that the bench test cannot be conducted on the dynamic environment is solved, and the bench test range and the effectiveness of the bench test range are widened.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration 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 (7)
1. The vehicle body domain testing system is characterized by comprising an upper computer, a lower computer, a testing rack and an external power supply;
the lower computer comprises a power chassis simulation system, wherein the power chassis simulation system 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, and the automatic gearbox control simulation module, the vehicle body electronic stability control simulation module and the gear shifting execution controller simulation module are all virtual nodes;
the test bench comprises a vehicle body domain, wherein the vehicle body domain comprises a gear shifting control unit, the gear shifting control unit is connected with a bus, and the gear shifting control unit is a real node;
the gear shifting control unit is used for collecting gear shifting operation information on a vehicle body domain and sending the gear shifting operation information to the bus; the automatic gearbox control simulation module is used for simulating current gear information and sending the current gear information to the bus; the vehicle body electronic stability control simulation module is used for simulating the current vehicle speed and the current brake switch information and transmitting the current vehicle speed and the current brake switch information to the bus;
the automatic gearbox control simulation module is used for performing gear switching according to the target gear information.
2. The body area test system of claim 1, wherein the power chassis simulation system further comprises an engine management simulation module for simulating engine speed, engine water temperature.
3. The vehicle body area test system of claim 1, wherein the power chassis simulation system further comprises an electric power steering simulation module for simulating steering wheel angle, steering torque.
4. The body area test system of claim 1, wherein the power chassis simulation system further comprises an airbag simulation module for simulating a vehicle collision signal.
5. The body area test system of claim 1, wherein the body area further comprises an instrument control module, the instrument control module being connected to the bus;
if the gear shifting operation does not meet the gear shifting requirement, the gear shifting execution controller simulation module sends abnormal prompt information to a bus; and the instrument control module displays the abnormal prompt information.
6. The vehicle body area test system of claim 1, wherein the shift execution controller simulation module determining whether a shift operation meets a shift requirement comprises:
judging whether the brake is stepped down according to the brake switch information, and if not, enabling the gear shifting operation to be not in accordance with the gear shifting requirement.
7. The vehicle body area test system of claim 6, wherein the shift execution controller simulation module determines whether a shift operation meets a shift requirement, further comprising:
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.
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