Gear shifting performance testing method, device and equipment of dual-motor driving system and medium

Abstract

The embodiment of the invention provides a gear shifting performance testing method and device of a dual-motor driving system, equipment and a medium, and relates to the technical field of performance testing. The method comprises the following steps: responding to a working condition control instruction sent by an industrial personal computer; under the condition that it is judged that the working condition control instruction meets the preset working condition, a gear shifting mechanism of a to-be-tested power system is controlled to execute gear shifting operation, so that the to-be-tested power system is switched to a corresponding power output mode; and recording key index data corresponding to the power output mode switching process of the to-be-tested power system in real time, and determining the response performance of the gear shifting mechanism based on the key index data. According to the embodiment of the invention, the gear shifting performance test platform is built for the dual-motor driving system, the gear shifting process of the dual-motor driving system in the actual operation condition can be efficiently simulated, the interference of an invalid condition is avoided, and the efficiency of gear shifting mechanism performance test is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of performance testing, and in particular to a method, device, equipment and medium for testing the shifting performance of a dual-motor drive system. Background Art

[0002] At present, the development of electric vehicles is becoming more and more mature. As electric vehicles pursue more efficient power systems, dual-motor power drive has become a major solution. The working modes of the dual-motor power drive system are divided into single-motor mode and dual-motor coupling mode. Under the premise of meeting the power requirements of the vehicle, the efficiency of the drive system can be improved by reasonably and efficiently controlling the switching of the dual-motor power system between the single-motor drive and dual-motor coupling drive modes.

[0003] The dual-motor power drive system uses an actuator and a shift mechanism with a locking mechanism to achieve power disconnection and coupling between the power motor and the reducer, where the locking mechanism usually uses a shift fork-type disconnection structure. At present, the performance test of the dual-motor drive system shift mechanism mainly adopts the method of carrying out testing on a real vehicle, but due to the complex road conditions in actual driving scenarios, this test method will inevitably be interfered by a large number of invalid working conditions, resulting in low efficiency of the shift mechanism performance test. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method, device, equipment and medium for testing the shifting performance of a dual-motor drive system, so as to improve the efficiency of performance testing of the shifting mechanism.

[0005] In a first aspect, an embodiment of the present application provides a method for testing the shifting performance of a dual-motor drive system, comprising:

[0006] Responding to the working condition control instruction sent by the industrial computer;

[0007] When it is determined that the working condition control instruction satisfies the preset working condition, controlling the shift mechanism of the power system to be tested to perform a shift operation, so that the power system to be tested switches to a corresponding power output mode;

[0008] The key indicator data corresponding to the process of switching the power output mode of the power system to be tested is recorded in real time, and the response performance of the shift mechanism is determined based on the key indicator data.

[0009] In the embodiment of the present application, by utilizing the gear shifting performance test platform built for the dual-motor drive system, the gear shifting process of the dual-motor drive system in actual operating conditions can be efficiently simulated, and the interference of invalid working conditions can be avoided, thereby effectively improving the efficiency of the gear shifting mechanism performance test.

[0010] In some possible embodiments, when it is determined that the working condition control instruction satisfies a preset working condition, controlling a shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes:

[0011] When the power system to be tested is operating in a single-motor drive mode, if it is determined that the operating condition control instruction is a sports mode activation instruction, determining that the operating condition control instruction satisfies a preset sports mode activation operating condition;

[0012] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

[0013] In the embodiment of the present application, by simulating the driving scenario of turning on the sports mode in the single motor mode, the single and double motor shifting process in response to the sports mode can be efficiently simulated, effectively improving the efficiency of the shifting mechanism performance test.

[0014] In some possible embodiments, when it is determined that the working condition control instruction satisfies a preset working condition, controlling a shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes:

[0015] When the power system to be tested is operating in a single-motor drive mode, if it is determined that the acceleration command corresponding to the operating condition control command is greater than a preset acceleration threshold, it is determined that the operating condition control command meets a preset rapid acceleration operating condition;

[0016] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

[0017] In the embodiment of the present application, by simulating the driving scenario of rapid acceleration in single-motor mode, the single and double gear shifting process of the rapid acceleration process can be efficiently simulated, effectively improving the efficiency of the shifting mechanism performance test.

[0018] In some possible embodiments, when it is determined that the working condition control instruction satisfies a preset working condition, controlling a shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes:

[0019] When the power system to be tested is operating in a single-motor drive mode, if it is determined that the load-side torque demand value corresponding to the operating condition control instruction is greater than a preset wheel-end torque threshold value, it is determined that the operating condition control instruction meets a preset mountain off-road operating condition;

[0020] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

[0021] In the embodiment of the present application, by simulating the scenario of providing a larger slope torque demand in single-motor mode, the single and double gear shifting process of mountain off-road can be efficiently simulated, effectively improving the efficiency of the gear shifting mechanism performance test.

[0022] In some possible embodiments, controlling the shift mechanism of the power system to be tested to perform an engagement operation so that the power system to be tested switches to a dual-motor drive mode includes:

[0023] issuing a shift mechanism engagement instruction to control the shift mechanism of the power system to be tested to perform an engagement operation;

[0024] When it is determined based on the displacement state information of the shift mechanism that the shift mechanism has completed the engagement operation, the power system to be tested is determined to be switched to the dual-motor drive mode, and the power output of the power system to be tested is controlled according to the torque logic control matrix corresponding to the preset working condition;

[0025] Among them, the preset operating conditions include at least one of a sports mode on operating condition, a rapid acceleration operating condition and a mountain off-road operating condition.

[0026] In an embodiment of the present application, by judging whether the gear shift is completed based on the displacement state information of the gear shift mechanism, and controlling the power system based on the torque logic control matrix of the corresponding working condition after the gear shift is completed, it is possible to efficiently simulate the power system driving scenarios under various working conditions, thereby effectively improving the efficiency of the gear shift mechanism performance test.

[0027] In some possible embodiments, the real-time recording of key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determining the response performance of the shift mechanism based on the key indicator data, includes:

[0028] The time information between issuing the shift mechanism engagement instruction and judging whether the shift mechanism has completed the engagement operation is recorded, and the time information is compared with the standard shift time threshold corresponding to the preset working condition to determine the response performance of the shift mechanism.

[0029] In an embodiment of the present application, by recording the duration from issuing a shift command to judging that the shift is complete, and comparing it with the preset standard shift duration of the corresponding working condition, the response performance of the shift mechanism can be quickly tested, thereby effectively improving the efficiency of the shift mechanism performance test.

[0030] In some possible embodiments, the real-time recording of key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determining the response performance of the shift mechanism based on the key indicator data, includes:

[0031] Recording in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested; wherein the key indicator data includes the first torque data corresponding to the fork-side motor of the power system to be tested, the second torque data corresponding to the non-fork-side motor of the power system to be tested, and the load-side torque data of the power system to be tested;

[0032] Determining a torque signal duty ratio corresponding to a process of switching a power output mode of the power system to be tested based on the first torque data, the second torque data and the load-side torque data; wherein the torque signal duty ratio is used to characterize a proportional correspondence between the first torque data, the second torque data and the load-side torque data;

[0033] The duty cycle of the torque signal is compared with a standard torque duty cycle corresponding to the preset operating condition to obtain a corresponding degree of duty cycle matching, and the response performance of the shift mechanism is determined based on the degree of duty cycle matching.

[0034] In an embodiment of the present application, by recording the torque data and duty cycle of each side related to the gear shifting process, and comparing them based on the preset standard torque duty cycle under various operating conditions, the response performance of the gear shifting mechanism can be quickly tested, thereby effectively improving the efficiency of the gear shifting mechanism performance test.

[0035] In a second aspect, an embodiment of the present application provides a gear shifting performance testing device for a dual-motor drive system, comprising:

[0036] The command response module is used to respond to the working condition control command sent by the industrial computer;

[0037] A shift control module, for controlling a shift mechanism of the power system to be tested to perform a shift operation when it is determined that the working condition control instruction satisfies a preset working condition, so that the power system to be tested switches to a corresponding power output mode;

[0038] The performance test module is used to record in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determine the response performance of the shift mechanism based on the key indicator data.

[0039] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor can implement the method described in any embodiment of the first aspect when executing the program.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method described in any embodiment of the first aspect can be implemented.

[0041] In a fifth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a computer program, wherein when the computer program is executed by a processor, the method described in any embodiment of the first aspect can be implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic flow chart of a method for testing the shifting performance of a dual-motor drive system provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of a gear shifting performance testing device for a dual-motor drive system provided in an embodiment of the present application;

[0045] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0047] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that in the prior art, the functional test of the dual-motor shift mechanism is mainly carried out by mounting a real vehicle for testing. However, due to the complex road conditions in actual driving scenarios, this testing method will inevitably be interfered by a large number of invalid working conditions, resulting in the performance test of the shift mechanism having shortcomings such as low efficiency and high cost.

[0049] In view of the problems existing in the above-mentioned prior art, an embodiment of the present application provides a gear shifting performance testing method for a dual-motor drive system. By utilizing a gear shifting performance testing platform built for the dual-motor drive system, it is possible to accurately and efficiently simulate the gear shifting process of the dual-motor drive system in different operating conditions, thereby effectively improving the efficiency of the gear shifting mechanism performance testing.

[0050] Exemplarily, the shift performance test platform may include an industrial computer, a data acquisition module, a communication module, a main control module, a power module and a power load module. Among them, the industrial computer is connected to the data acquisition module and the communication module, the communication module is connected to the main control module and the power system to be tested, and the industrial computer is mainly used to send working condition control instructions to the main control module through the communication module; the data acquisition module is connected to the power system to be tested, and is used to collect various data related to the power system to be tested; the power module is used to provide power to various devices and modules in the test platform; the power load module is connected to the power system to be tested, and when the power system to be tested has fully equipped with software and hardware functions in the test phase, the power load module can be used as a power absorption dynamometer to simulate the kinetic energy absorbed by the wheels and output, and can provide wind resistance and road resistance under corresponding vehicle speed and road conditions; when the power system to be tested has not completed trial production in the test phase, for example, the non-power shift side motor is missing, the power load module can be set to the power supply mode, and the power load module reverses the reducer to generate a speed difference on both sides of the power shift mechanism and provide torque, thereby realizing various functional tests of the shift mechanism.

[0051] like Figure 1 As shown, the embodiment of the present application provides a shift performance test method for a dual-motor drive system, which is executed by a main control module and may include the following steps:

[0052] S1. Respond to the working condition control instruction sent by the industrial computer.

[0053] Specifically, the industrial computer can send specific working condition control instructions to the main control module according to the test requirements. For example, the industrial computer can simulate the throttle command and send it to the main control module, and the main control module controls the output parameters such as torque and speed of the power system to be tested according to the corresponding throttle command. For another example, the industrial computer can issue a control instruction to directly control the engagement or disengagement of the shift mechanism, and the main control module controls the engagement or disengagement of the shift mechanism according to the corresponding instruction.

[0054] S2. When it is determined that the operating condition control instruction satisfies a preset operating condition, control a shift mechanism of the power system to be tested to perform a shift operation, so that the power system to be tested switches to a corresponding power output mode.

[0055] After receiving the working condition control instruction sent by the industrial computer, the main control module can control the power system to be tested to execute the corresponding power output mode according to the working condition control instruction. Wherein, when it is judged that the working condition control instruction meets the preset working condition, the shift mechanism of the power system to be tested can be controlled to perform the shifting operation, including controlling the engagement or disconnection of the shift mechanism. Accordingly, controlling the engagement of the shift mechanism is equivalent to switching from the single motor output mode to the dual motor output mode, and controlling the disconnection of the shift mechanism is equivalent to switching from the dual motor output mode to the single motor output mode.

[0056] It should be noted that the preset operating conditions may include sports mode activation conditions, rapid acceleration conditions and mountain off-road conditions. The determination and response process of each operating condition is described in detail below.

[0057] S3. Record in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determine the response performance of the shift mechanism based on the key indicator data.

[0058] Specifically, by recording in real time the key indicator data within the preset time windows before and after the power output mode switching process, further processing and analysis can be performed based on these key indicator data to determine the response performance of the shift mechanism.

[0059] Exemplarily, the key indicator data may include the duration information of the process from initiating the gear shift command to completing the gear shift, based on which it can be compared with the preset gear shift duration to determine the gear shift response performance of the gear shift mechanism; in addition, it can also include data such as the power system output torque and speed during the gear shift process, and then form corresponding torque and speed data curves, which are compared with preset standard data curves to determine the response performance of the gear shift mechanism.

[0060] In the embodiment of the present application, by utilizing the gear shifting performance test platform built for the dual-motor drive system, the gear shifting process of the dual-motor drive system in response to different operating conditions can be accurately and conveniently simulated, and the interference of invalid operating conditions can be avoided. The disadvantages of the test scheme using a real vehicle, such as high cost, long time consumption, and strict requirements on the test site, are avoided, thereby effectively improving the efficiency of the gear shifting mechanism performance test.

[0061] In some possible embodiments, step S2 may include:

[0062] When the power system to be tested is operating in a single-motor drive mode, if the operating condition control instruction is determined to be a sports mode start instruction, determining that the operating condition control instruction meets a preset sports mode start operating condition;

[0063] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor drive mode.

[0064] Specifically, a motion mode start instruction can be sent to the main control module through the industrial computer. When the main control module determines that the power system to be tested is operating in the single-motor drive mode and receives the motion mode start instruction, it is determined that the preset motion mode start operating conditions are met, and the shift mechanism of the power system to be tested is controlled to perform the engagement operation, so that the power system to be tested is switched to the dual-motor drive mode.

[0065] Accordingly, when the power system to be tested is operating in the dual-motor drive mode, if the operating condition control instruction sent by the industrial computer is determined to be a motion mode exit instruction, it is determined that the preset motion mode exit operating condition is met. At this time, the shift mechanism of the power system to be tested is controlled to perform the disconnection operation, so that the power system to be tested switches to the single-motor drive mode.

[0066] In some possible embodiments, step S2 may further include:

[0067] When the power system to be tested is operating in a single-motor drive mode, if it is determined that the acceleration command corresponding to the operating condition control command is greater than a preset acceleration threshold, it is determined that the operating condition control command meets the preset rapid acceleration operating condition;

[0068] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor drive mode.

[0069] Specifically, for the determination of the rapid acceleration working condition, when the power system to be tested is running in a single-motor drive mode, it can be determined whether the acceleration instruction therein is greater than the preset acceleration threshold value according to the working condition control instruction sent by the industrial computer. If so, it is determined that the preset rapid acceleration working condition is met. Among them, the acceleration instruction can be expressed as the throttle opening value, that is, the industrial computer simulates sending an instruction to deeply step on the accelerator to the preset throttle opening. At this time, the main control module can determine that the acceleration instruction corresponding to the working condition control instruction is greater than the preset acceleration threshold value; or, the acceleration instruction can be expressed as the torque increase value within a preset unit time t. For example, when the throttle instruction increase within the preset time t exceeds the preset threshold value (equivalent to determining that the slope of the torque demand increase within the preset time t is greater than the preset slope), it can be determined that the acceleration instruction corresponding to the working condition control instruction is greater than the preset acceleration threshold value.

[0070] It should be noted that, in the process of determining the rapid acceleration working condition, in addition to determining whether the acceleration command is greater than the preset acceleration threshold, a vehicle speed determination prerequisite can be added to simulate the acceleration action of deeply pressing the accelerator in the later stage of high-speed driving in the actual driving scenario. For example, when the power system to be tested is running in the single-motor drive mode, if it is determined that the current power system to be tested is running above the preset high-speed critical vehicle speed, and it is determined that the acceleration command corresponding to the working condition control command is greater than the preset acceleration threshold, it is determined that the working condition control command meets the preset high-speed later stage rapid acceleration working condition.

[0071] Accordingly, when the power system to be tested is operating in the dual-motor drive mode, if it is determined that the acceleration demand corresponding to the operating condition control instruction sent by the industrial computer is less than the threshold, it is determined that the preset rapid acceleration exit operating condition is met. At this time, the shift mechanism of the power system to be tested is controlled to perform the disconnection operation, so that the power system to be tested switches to the single-motor drive mode.

[0072] In some possible embodiments, step S2 may further include:

[0073] When the power system to be tested is operating in a single-motor drive mode, if it is determined that the load-side torque demand value corresponding to the operating condition control instruction is greater than a preset wheel-end torque threshold value, it is determined that the operating condition control instruction meets the preset mountain off-road operating condition;

[0074] The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor drive mode.

[0075] Specifically, for the determination of mountain off-road operating conditions, when the power system to be tested is operating in a single-motor drive mode, it can be determined based on the operating condition control instructions sent by the industrial computer whether the load-side torque demand value is greater than the preset wheel-end torque critical value. If so, it is determined that the preset mountain off-road operating conditions are met.

[0076] It can be understood that when the vehicle is actually operating in a mountain off-road scenario, the corresponding operating condition is that the vehicle speed is not high and the torque demand is relatively large. Based on this, a vehicle speed determination prerequisite can be added. For example, when the power system to be tested is operating in a single-motor drive mode, if it is judged that the current power system to be tested is operating below the preset low speed, and it is judged that the load-side torque demand value corresponding to the operating condition control instruction is greater than the preset wheel-end torque critical value, it can be determined that the preset mountain off-road operating condition conditions are met.

[0077] Accordingly, when the power system to be tested is operating in the dual-motor drive mode, if the vehicle speed is judged to be greater than the preset threshold or the load-side torque demand value is judged to be less than the preset threshold, it is determined that the preset mountain off-road exit condition is met. At this time, the shift mechanism of the power system to be tested is controlled to perform the disconnection operation, so that the power system to be tested switches to the single-motor drive mode.

[0078] In some possible embodiments, controlling the shift mechanism of the power system to be tested to perform an engagement operation so that the power system to be tested switches to the dual-motor drive mode may specifically include:

[0079] issuing a shift mechanism engagement instruction to control the shift mechanism of the power system to be tested to perform an engagement operation;

[0080] When it is determined based on the displacement state information of the shift mechanism that the shift mechanism has completed the engagement operation, the power system to be tested is determined to be switched to the dual-motor drive mode, and the power output of the power system to be tested is controlled according to the torque logic control matrix corresponding to the preset working condition;

[0081] Among them, the preset operating conditions include at least one of a sports mode on operating condition, a rapid acceleration operating condition and a mountain off-road operating condition.

[0082] It should be noted that in the process of controlling the shift mechanism to perform the engagement operation, it is possible to determine whether the shift mechanism has completed the engagement based on the displacement state information of the shift mechanism, and after the engagement is completed, the power output of the power system to be tested is controlled based on the pre-written torque logic control matrix.

[0083] Exemplarily, the displacement state information can be composed of two parts, one part comes from the action and movement state of the shift fork type power shift mechanism, and the other part comes from the number of revolutions of the actuator motor that controls the shift fork type power shift mechanism or the pressure sensor voltage value signal of the hydraulic pushing device. As for whether the shift fork type power shift mechanism is completed by the actuator motor or the hydraulic pushing device, it can be set according to actual test requirements, and the embodiments of the present application are not limited to this.

[0084] In some possible embodiments, step S3 may include:

[0085] The time information between issuing the shift mechanism engagement command and judging whether the shift mechanism has completed the engagement operation is recorded, and the time information is compared with the standard shift time threshold corresponding to the preset working condition to determine the response performance of the shift mechanism.

[0086] It should be noted that by comparing the duration information of the process from initiating the shift command to completing the shift, and with the preset standard shift duration, the response speed and efficiency of the shift mechanism can be determined.

[0087] Exemplarily, the moment of issuing the gear shift mechanism engagement instruction can be the moment when the gear shift condition is determined to be satisfied. In addition, by judging whether the position of the gear shift mechanism has reached a preset position, or judging whether the displacement change of the gear shift mechanism is greater than a preset change, or judging whether the number of revolutions of the motor rotation exceeds a preset threshold, the above judgment methods or a combination thereof can be used to determine whether the gear shift mechanism has completed the engagement. Based on this, the moment when the gear shift mechanism completes the engagement operation can be determined, and then the time elapsed between the two moments is used as the duration information, and the difference between the duration information and the standard gear shift duration threshold is judged, so as to determine the response performance of the gear shift mechanism according to the size of the difference.

[0088] In some possible embodiments, step S3 may further include:

[0089] Real-time recording of key indicator data corresponding to the process of switching power output modes of the power system to be tested; wherein the key indicator data include first torque data corresponding to the fork-side motor of the power system to be tested, second torque data corresponding to the non-fork-side motor of the power system to be tested, and load-side torque data of the power system to be tested;

[0090] Determine the torque signal duty ratio corresponding to the process of switching the power output mode of the power system to be tested based on the first torque data, the second torque data and the load-side torque data; wherein the torque signal duty ratio is used to characterize the proportional correspondence between the first torque data, the second torque data and the load-side torque data;

[0091] The duty cycle of the torque signal is compared with the standard torque duty cycle corresponding to the preset working condition to obtain the corresponding duty cycle matching degree, and the response performance of the shift mechanism is determined based on the duty cycle matching degree.

[0092] It should be noted that during the engagement of the shift mechanism, different torque signal duty cycles will be generated due to the different engagement displacements of the shift mechanism. Among them, according to the different positions relative to the fork-type shift mechanism, the dual-motor drive system can be divided into a fork-side motor and a non-fork-side motor. The fork-side motor refers to a motor on one side used to output power when the shift mechanism is disconnected. The first torque data corresponding to the fork-side motor, the second torque data corresponding to the non-fork-side motor, and the load-side torque data can be collected respectively through the data acquisition module. Generally, the torque signal duty cycle refers to the ratio of the first torque data to the second torque data. In some instances, the torque signal duty cycle can also be the ratio of the first torque data or the second torque data to the load-side torque data.

[0093] By collecting data at a preset frequency and calculating the corresponding torque signal duty cycle, a torque signal duty cycle curve for the process of switching the power output mode (shifting process) can be formed. By comparing it with the preset standard torque duty cycle (curve), the degree of duty cycle matching between the two can be calculated (for example, the accumulated error value of equally spaced points in the two curves can be used for measurement), thereby determining the response performance of the shift mechanism based on the degree of duty cycle matching.

[0094] In some embodiments, for the functional test and performance test of the shift mechanism, the control conditions for disconnection and engagement can also be set based on the equidistant speed, that is, from 0 speed to the maximum speed, the corresponding fork side motor needs to be synchronized to the input speed of the reducer on the other side of the fork before engagement within a reasonable range above and below, and the test is performed cyclically by changing the different speeds that need to be tested. This can include testing the corresponding speed, the change in the displacement value of the disconnection and engagement side, etc., and the various components of the fork power shift mechanism can also be disassembled and tested after the test, such as wear and shape changes.

[0095] It should be noted that during the test, various data in the power shifting process can be recorded, such as displacement signals, disconnection and engagement signals, the number of movement circles of the shifting execution motor, the change in the displacement ratio of the shifting mechanism and other required data (such as the absolute value of the speed torque of the power load module and the slope of the change curve, etc.). By superimposing and recording various data of different road conditions in the same data file for comparison, cumulative data results can be obtained. These data can be classified and viewed according to needs, that is, different types of data are placed in different coordinate systems to compare the trends of changes in duty cycle, displacement, etc. under different speeds and different engagement and disconnection conditions, and the performance of the shifting mechanism is evaluated based on these trend data. In addition, different dimensions can also be divided for data comparison, such as comparing the data of the three time periods before, during and after the basic function test, so as to evaluate whether the performance of the shifting mechanism has been attenuated, and can serve as data support for subsequent compensation strategies such as self-learning.

[0096] Please refer to Figure 2 , Figure 2 FIG. 1 is a block diagram showing the components of a gear shifting performance test device for a dual motor drive system provided in some embodiments of the present application. It should be understood that the gear shifting performance test device for a dual motor drive system is similar to the above-mentioned Figure 1 Corresponding to the method embodiment, it is able to execute each step involved in the above method embodiment. The specific functions of the gear shifting performance testing device of the dual-motor drive system can be found in the description above. To avoid repetition, the detailed description is appropriately omitted here.

[0097] Figure 2The gear shifting performance testing device for a dual-motor drive system includes at least one software function module that can be stored in a memory in the form of software or firmware or solidified in the gear shifting performance testing device for a dual-motor drive system, and the gear shifting performance testing device for a dual-motor drive system includes:

[0098] The command response module 210 is used to respond to the working condition control command sent by the industrial computer;

[0099] The shift control module 220 is used to control the shift mechanism of the power system to be tested to perform a shift operation when it is determined that the working condition control instruction meets the preset working condition, so that the power system to be tested switches to a corresponding power output mode;

[0100] The performance test module 230 is used to record in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determine the response performance of the shift mechanism based on the key indicator data.

[0101] It can be understood that the above-mentioned device item embodiment corresponds to the method item embodiment of the present invention. The gear shifting performance testing device of a dual-motor drive system provided by the embodiment of the present invention can implement the gear shifting performance testing method of a dual-motor drive system provided by any method item embodiment of the present invention.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the device described above can refer to the corresponding process in the aforementioned method, and will not be described in detail here.

[0103] like Figure 3 As shown, some embodiments of the present application provide an electronic device 300, which includes: a memory 310, a processor 320, and a computer program stored in the memory 310 and executable on the processor 320, wherein the processor 320 reads the program from the memory 310 through the bus 330 and executes the program to implement a method of any embodiment included in the shifting performance test method of the dual-motor drive system described above.

[0104] Processor 320 can process digital signals and can include various computing structures, such as complex instruction set computer structure, reduced instruction set computer structure, or a structure that implements a combination of multiple instruction sets. In some examples, processor 320 can be a microprocessor.

[0105] The memory 310 may be used to store instructions executed by the processor 320 or data related to the execution of instructions. These instructions and / or data may include codes for implementing some or all functions of one or more modules described in the embodiments of the present application. The processor 320 of the disclosed embodiment may be used to execute instructions in the memory 310 to implement the method shown above. The memory 310 includes a dynamic random access memory, a static random access memory, a flash memory, an optical memory, or other memory known to those skilled in the art.

[0106] Some embodiments of the present application further provide a computer-readable storage medium having a computer program stored thereon. The computer program is executed by a processor to execute the method described in the method embodiment.

[0107] Some embodiments of the present application further provide a computer program product, which, when executed on a computer, enables the computer to execute the method described in the method embodiment.

[0108] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0109] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0110] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0111] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0112] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0113] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0114] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A method for testing the shifting performance of a dual-motor drive system, characterized in that: include: Responding to the working condition control instruction sent by the industrial computer; When it is determined that the working condition control instruction satisfies the preset working condition, controlling the shift mechanism of the power system to be tested to perform a shift operation, so that the power system to be tested switches to a corresponding power output mode; The key indicator data corresponding to the process of switching the power output mode of the power system to be tested is recorded in real time, and the response performance of the shift mechanism is determined based on the key indicator data.

2. The shift performance testing method of the dual-motor drive system according to claim 1, characterized in that: When it is determined that the working condition control instruction satisfies the preset working condition, controlling the shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes: When the power system to be tested is operating in a single-motor drive mode, if it is determined that the operating condition control instruction is a sports mode activation instruction, determining that the operating condition control instruction satisfies a preset sports mode activation operating condition; The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

3. The shift performance testing method of the dual-motor drive system according to claim 1, characterized in that: When it is determined that the working condition control instruction satisfies the preset working condition, controlling the shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes: When the power system to be tested is operating in a single-motor drive mode, if it is determined that the acceleration command corresponding to the operating condition control command is greater than a preset acceleration threshold, it is determined that the operating condition control command meets a preset rapid acceleration operating condition; The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

4. The shift performance testing method of the dual-motor drive system according to claim 1, characterized in that: When it is determined that the working condition control instruction satisfies the preset working condition, controlling the shift mechanism of the power system to be tested to perform a shift operation so that the power system to be tested switches to a corresponding power output mode includes: When the power system to be tested is operating in a single-motor drive mode, if it is determined that the load-side torque demand value corresponding to the operating condition control instruction is greater than a preset wheel-end torque threshold value, it is determined that the operating condition control instruction meets a preset mountain off-road operating condition; The shift mechanism of the power system to be tested is controlled to perform an engagement operation so that the power system to be tested is switched to a dual-motor driving mode.

5. The shift performance testing method of the dual-motor drive system according to claim 1, characterized in that: The step of controlling the shift mechanism of the power system to be tested to perform an engagement operation so that the power system to be tested switches to a dual-motor driving mode includes: issuing a shift mechanism engagement instruction to control the shift mechanism of the power system to be tested to perform an engagement operation; When it is determined based on the displacement state information of the shift mechanism that the shift mechanism has completed the engagement operation, the power system to be tested is determined to be switched to the dual-motor drive mode, and the power output of the power system to be tested is controlled according to the torque logic control matrix corresponding to the preset working condition; Among them, the preset operating conditions include at least one of a sports mode on operating condition, a rapid acceleration operating condition and a mountain off-road operating condition.

6. The shift performance testing method of the dual-motor drive system according to claim 5, characterized in that: The real-time recording of key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determining the response performance of the shift mechanism based on the key indicator data, includes: The time information between issuing the shift mechanism engagement instruction and judging whether the shift mechanism has completed the engagement operation is recorded, and the time information is compared with the standard shift time threshold corresponding to the preset working condition to determine the response performance of the shift mechanism.

7. The shift performance testing method of the dual-motor drive system according to claim 1, characterized in that: The real-time recording of key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determining the response performance of the shift mechanism based on the key indicator data, includes: Recording in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested; wherein the key indicator data includes the first torque data corresponding to the fork-side motor of the power system to be tested, the second torque data corresponding to the non-fork-side motor of the power system to be tested, and the load-side torque data of the power system to be tested; Determining a torque signal duty ratio corresponding to a process of switching a power output mode of the power system to be tested based on the first torque data, the second torque data and the load-side torque data; wherein the torque signal duty ratio is used to characterize a proportional correspondence between the first torque data, the second torque data and the load-side torque data; The duty cycle of the torque signal is compared with a standard torque duty cycle corresponding to the preset operating condition to obtain a corresponding degree of duty cycle matching, and the response performance of the shift mechanism is determined based on the degree of duty cycle matching.

8. A gear shifting performance testing device for a dual-motor drive system, characterized in that: include: The command response module is used to respond to the working condition control command sent by the industrial computer; A shift control module, for controlling a shift mechanism of the power system to be tested to perform a shift operation when it is determined that the working condition control instruction satisfies a preset working condition, so that the power system to be tested switches to a corresponding power output mode; The performance test module is used to record in real time the key indicator data corresponding to the process of switching the power output mode of the power system to be tested, and determine the response performance of the shift mechanism based on the key indicator data.

9. An electronic device, characterized in that: It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor can implement the shifting performance testing method of the dual-motor drive system described in any one of claims 1-7 when executing the program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the shifting performance testing method of the dual-motor drive system as described in any one of claims 1-7 is executed.

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