Gearbox control method and device, electronic equipment and computer readable storage medium

Abstract

The invention provides a gearbox control method and device, electronic equipment and a computer readable storage medium. The method comprises the steps that a first damage map of a first transmission chain and a second damage map of a second transmission chain are obtained; the current working condition of the dual-motor drive gearbox, the first motor rotating speed and the first motor torque of the first transmission chain and the second motor rotating speed and the second motor torque of the second transmission chain are obtained; determining a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor rotating speed and the first motor torque; determining a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor rotating speed and the second motor torque; and under the condition that the difference value of the first damage value and the second damage value is larger than a preset threshold value, when the double-motor drive gearbox has the single-motor drive requirement next time, the single-motor drive working condition is switched to the transmission chain with the small damage value. The service life of the gearbox can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor control, and in particular to a gearbox control method and device, an electronic device, and a computer readable storage medium. BACKGROUND

[0002] Compared with a gearbox driven by a single motor at low speed and high torque, a gearbox driven by double motors at high speed has a cost advantage and can realize power uninterrupted gear shifting. However, the gearbox driven by double motors has two power transmission paths, and in addition to the torque and speed control strategy based on the optimal efficiency of a single motor, the life distribution of components on the two different transmission paths also needs to be considered to improve the total life of the gearbox.

[0003] Therefore, there is an urgent need for a gearbox control method to solve the above problems. SUMMARY

[0004] Therefore, there is an urgent need for a gearbox control method to solve the above problems.

[0005] A first aspect of the embodiments of the present application provides a gearbox control method applied to a double-motor-driven gearbox having a first transmission chain and a second transmission chain. The method comprises: obtaining a first damage map of the first transmission chain and a second damage map of the second transmission chain, wherein the first damage map is used to record first maximum damage values of all components corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage map is used to record second maximum damage values of all components corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, N is an integer greater than 1; obtaining a current working condition of the double-motor-driven gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain; determining a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed and the first motor torque; determining a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed and the second motor torque; in the case that the difference between the first damage value and the second damage value is greater than a preset threshold, switching a single-motor-driven working condition to a transmission chain with a smaller damage value when the double-motor-driven gearbox has a single-motor-driven demand next time.

[0006] In a possible implementation, before the first damage pattern of the first transmission chain is acquired, the method further includes: acquiring a bench load spectrum of the dual-motor drive gearbox, the bench load spectrum being used to record motor torque, motor speed and bench time of the dual-motor drive gearbox in different gears and driven by different transmission chains; acquiring a first reference damage percentage set of each part on the first transmission chain according to the bench load spectrum; and acquiring the first damage pattern of the first transmission chain includes: acquiring a first damage percentage set of all parts of the first transmission chain in N preset working conditions; and calculating the first damage pattern according to the first reference damage percentage set and the first damage percentage set.

[0007] In a possible implementation, the first reference damage percentage set of each part on the first transmission chain is acquired according to the bench load spectrum, including: establishing a structure simulation model of the dual-motor drive gearbox; and importing the bench load spectrum into the structure simulation model to obtain the first reference damage percentage set.

[0008] In a possible implementation, the first damage percentage set of all parts of the first transmission chain in N preset working conditions is acquired, including: for each of the preset working conditions, calculating a first damage percentage sub-set of each part of the first transmission chain in different motor torques and motor speeds; and taking N first damage percentage sub-sets corresponding to N preset working conditions as the first damage percentage set.

[0009] In a possible implementation, the first damage pattern is calculated according to the first reference damage percentage set and the first damage percentage set, including: for each of the preset working conditions, determining a maximum damage percentage in the first damage percentage sub-set; determining a target reference damage percentage corresponding to a target part in the first reference damage percentage set, where the target part is a part corresponding to the maximum damage percentage; calculating a maximum loss value corresponding to the preset working condition according to the maximum damage percentage and the target reference damage percentage; and taking maximum loss values corresponding to N preset working conditions as the first damage pattern.

[0010] In a possible implementation, the preset working conditions at least include a preset working temperature, a preset gearbox gear and a preset gearbox running time.

[0011] In a possible implementation, the method further includes: calculating a first cumulative damage value of the first transmission chain according to the first damage value; calculating a second cumulative damage value of the second transmission chain according to the second damage value; and sending a maintenance reminder information when it is detected that the first cumulative damage value and / or the second cumulative damage value is greater than or equal to a preset damage threshold.

[0012] In a second aspect, the embodiments of the present application further provide a gearbox control device, applied to a dual-motor drive gearbox having a first transmission chain and a second transmission chain; the gearbox control device includes a first acquisition module, a second acquisition module, a first determination module, a second determination module, and a control module; the first acquisition module is configured to acquire a first damage map of the first transmission chain and a second damage map of the second transmission chain, wherein the first damage map is configured to record first maximum damage values of all parts corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage map is configured to record second maximum damage values of all parts corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, N is an integer greater than 1; the second acquisition module is configured to acquire a current working condition of the dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain; the first determination module is configured to determine a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed, and the first motor torque; the second determination module is configured to determine a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed, and the second motor torque; and the control module is configured to switch a single-motor drive working condition to a transmission chain with a smaller damage value when a next single-motor drive demand occurs to the dual-motor drive gearbox, when a difference between the first damage value and the second damage value is greater than a preset threshold.

[0013] In a third aspect, the embodiments of the present application further provide an electronic device, including a processor and a memory, the memory is configured to store instructions, and the processor is configured to invoke the instructions in the memory, so that the electronic device executes the gearbox control method as described in the first aspect.

[0014] In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, which stores computer instructions, when the computer instructions run on an electronic device, the electronic device executes the gearbox control method as described in the first aspect.

[0015] Compared with the related art, the embodiments of the present application have at least the following advantages: by acquiring the first damage map of the first transmission chain and the second damage map of the second transmission chain, the maximum damage values of the parts of the first transmission chain and the second transmission chain under different preset working conditions can be known. In the actual operation process of the dual-motor drive gearbox, by acquiring the current working condition of the dual-motor drive gearbox, the first motor speed and the first motor torque of the first transmission chain, and the second motor speed and the second motor torque of the second transmission chain, the first damage value corresponding to the first motor speed, the first motor torque and the current working condition can be found in the first damage map, and the second damage value can be found in the second damage map in the same way, so that the service life of the first transmission chain and the second transmission chain can be determined through the first damage value and the second damage value. In the case where the difference between the first damage value and the second damage value is greater than a preset threshold, it indicates that there is a transmission chain that is damaged more under the current working condition, and by switching the single-motor driving condition to the transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor driving requirement next time, the transmission chain with a larger damage can be prevented from being damaged due to continuous work, thereby improving the overall service life of the dual-motor drive gearbox.

[0016] The technical effects obtained by the above-mentioned second aspect, third aspect and fourth aspect are similar to the technical effects obtained by the corresponding technical means in the first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A step flow chart of a gearbox control method provided by an embodiment of the present application is provided. Figure 2 A structural schematic diagram of a gearbox provided by an embodiment of the present application is provided. Figure 3 Another step flow chart of a gearbox control method provided by an embodiment of the present application is provided. Figure 4 A functional module diagram of a gearbox control device provided by an embodiment of the present application is provided. Figure 5 A structural schematic diagram of an electronic device provided by an embodiment of the present application is provided. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. The described embodiments are merely a part of the embodiments of the present application, and are not all the embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0021] It is further noted that the terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0022] In the present application, "at least one" means one or more, and "multiple" means two or more than two. "And / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the present application and the drawings are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0023] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the exemplary or example embodiments are presented as a means of explanation so as to convey the underlying concept.

[0024] For ease of understanding, some explanations of concepts related to the embodiments of the present application are given as examples for reference.

[0025] Dual-motor drive gearbox: is the core component of hybrid electric vehicle (HEV) and plug-in hybrid electric vehicle (PHEV), through the integration of two motors and mechanical transmission mechanism, to realize the efficient cooperation of multiple driving modes.

[0026] TCU (Telematics Control Unit, remote information control unit): mainly used for wireless transmission of vehicle GPS location information, speed and other data back to the system platform, users can realize the monitoring and management of the vehicle through computer or mobile phone.

[0027] Please refer to Figure 1 , Figure 1 is a step flow chart of an embodiment of the gearbox control method of the present application. The order of the steps in the flow chart can be changed according to different needs, and some steps can be omitted.

[0028] It should be noted that the gearbox control method of the embodiments of the present application is applied to a dual-motor drive gearbox having a first transmission chain and a second transmission chain, and the execution subject can be a gearbox control device, for example, during the operation of the dual-motor drive gearbox, the dual-motor drive gearbox can be controlled by the gearbox control device to improve the overall life of the gearbox. Of course, the gearbox control method can also be applied to other scenarios, such as gearbox life test scenarios, which are not specifically limited by the present application.

[0029] The specific process of the embodiment is shown in Figure 1 , including the following steps: S101, obtaining a first damage map of the first transmission chain and a second damage map of the second transmission chain.

[0030] Specifically, the first damage map is used to record the first maximum damage value of all parts corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage map is used to record the second maximum damage value of all parts corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, and N is an integer greater than 1.

[0031] In some embodiments, before obtaining the first damage map of the first transmission chain, further comprising: obtaining a bench load spectrum of the dual-motor drive gearbox, the bench load spectrum being used to record the motor torque, motor speed and bench time of the dual-motor drive gearbox when driven by different transmission chains in different gears; obtaining a first reference damage percentage set of each part on the first transmission chain according to the bench load spectrum; obtaining the first damage map of the first transmission chain, comprising: obtaining a first damage percentage set of all parts of the first transmission chain under N preset working conditions; calculating the first damage map according to the first reference damage percentage set and the first damage percentage set.

[0032] In some embodiments, obtaining the first reference damage percentage set of each part on the first transmission chain according to the bench load spectrum, comprising: establishing a structural simulation model of the dual-motor drive gearbox; importing the bench load spectrum into the structural simulation model to obtain the first reference damage percentage set.

[0033] In some embodiments, the first damage percentage set of all parts of the first transmission chain under N preset working conditions is obtained by: for each preset working condition, calculating a first damage percentage sub-set of each part of the first transmission chain under different motor torques and motor speeds; and taking the N first damage percentage sub-sets corresponding to the N preset working conditions as the first damage percentage set.

[0034] In some embodiments, the first damage map is calculated according to the first reference damage percentage set and the first damage percentage set by: for each preset working condition, determining a maximum damage percentage in the first damage percentage sub-set; determining a target reference damage percentage corresponding to a target part in the first reference damage percentage set, wherein the target part is the part corresponding to the maximum damage percentage; calculating a maximum loss value corresponding to the preset working condition according to the maximum damage percentage and the target reference damage percentage; and taking the maximum loss values corresponding to the N preset working conditions as the first damage map.

[0035] In some embodiments, the preset working conditions at least include a preset working temperature, a preset gearbox gear position and a preset gearbox running time.

[0036] It can be understood that the manner of obtaining the second damage map is similar to that of obtaining the first damage map, and details are not repeated here to avoid repetition.

[0037] For the sake of understanding, the following will be combined with Figure 2 , Table 1 to Table 4 to specifically explain how to obtain the first damage map and the second damage map of the embodiments: Please refer to Figure 2 , the structure schematic diagram of the double-motor drive gearbox provided by the embodiments of the present application. The first transmission chain includes a drive motor C1, a connecting spline C3 and a first split box C5, and the second transmission chain includes a drive motor C2, a connecting spline C4 and a second split box C6; the double-motor drive gearbox further includes a confluence box C8 and a flange C9, the first split box C5 transmits the power generated by the drive motor C1 to the confluence box C8 through a first confluence gear set C10, and similarly, the second split box C6 transmits the power generated by the drive motor C2 to the confluence box C8 through a second confluence gear set C7, and finally the power of the confluence box C8 is output through the flange C9.

[0038] 1. Obtain the bench load spectrum of the double-motor drive gearbox, as shown in Table 1 below, including different motor torques, motor speeds and working hours corresponding to the drive motor C1 and the drive motor C2 working simultaneously or individually under gear position 1 or gear position 2 of the double-motor drive gearbox. It can be understood that in the bench load spectrum of the embodiments, if the drive motor C1 and the drive motor C2 work simultaneously, the motor torques and speeds of the drive motor C1 and the drive motor C2 are the same.

[0039]

[0040] Table 1 It can also be seen from Table 1 that the total bench load spectrum is Lm.

[0041] 2. A structure simulation model of the double-motor-driven gearbox is established, the structure simulation model including detailed parameters and structures of gears, detailed structures of shafts, bearing selection parameters, etc., the bench load spectrum is imported into the structure simulation model, a first reference damage percentage set of the first transmission chain and a second reference damage percentage set of the second transmission chain under standard temperature D0 are calculated, and the first reference damage percentage set and the second reference damage percentage set are life reference L0x of each part.

[0042] 3. Since the oil temperature of the oil in the gearbox affects the viscosity, which further affects the carrying capacity and service life of the gears and bearings; the temperature is classified into five levels of D1-D5 working levels in this embodiment, such as Table 2 shown below: Table 2

[0043] Table 2 4. A working condition spectrum of the first transmission chain under different motor speeds and motor torques is established, as shown in Table 3 below:

[0044] Table 3 5. The damage percentage of all parts on the first transmission chain under the condition of temperature D1, gear 1 of the gearbox, and working condition L11 running for 1h is calculated, wherein the gears are calculated according to bending damage, contact damage, and bearing damage, as shown in Table 4 below:

[0045] Table 4 6. The maximum damage value of all parts on the first transmission chain under the above working conditions is calculated, taking L11 = max{max(H1, H2, H3…), max(F1, F2, F3…), max(B1, B2, B3…), max(S1, S2, S3…)} / (Lm × L0x), and similarly, the calculation of L12, L13…L21…Lxx is completed, and similarly, the calculation of the maximum damage value of the first transmission chain under the conditions of temperatures D2, D3, D4, and D5 and gear 2 is completed, and the first damage spectrum is obtained.

[0046] 7. Similarly, the calculation of the second damage spectrum is completed.

[0047] S102, acquire the current working condition of the dual-motor driving gearbox, the first motor speed and the first motor torque of the first transmission chain, and the second motor speed and the second motor torque of the second transmission chain.

[0048] In some embodiments, the first motor speed and the first motor torque of the first transmission chain are the average motor speed and the average motor torque of the motor C1 in a preset time length, and the average motor speed and the average motor torque can be calculated by the TCU. Similarly, the average motor speed and the average motor torque of the second transmission chain in the preset time length are calculated by the TCU.

[0049] In some embodiments, the size of the preset time length is not specifically limited and can be set according to actual needs, for example, set to 1 hour.

[0050] In some embodiments, the current working condition includes the current running time, the current gear and the current temperature of the dual-motor driving gearbox S103, determine the first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed and the first motor torque.

[0051] Specifically, as known from the above acquisition process of the first damage map, the first damage map includes each first maximum damage value corresponding to each part of the first transmission chain under different temperatures, different gears, different running times, different motor speeds and different motor torques. Therefore, after the current working condition is determined, the first damage value corresponding to the first motor speed, the first motor torque and the current working condition can be found in the first damage map.

[0052] S104, determine the second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed and the second motor torque.

[0053] It can be understood that the determination method of the second damage value is similar to the determination method of the first damage value, and details are not repeated here to avoid repetition.

[0054] S105, in the case that the difference between the first damage value and the second damage value is greater than a preset threshold, when the dual-motor driving gearbox has a single-motor driving requirement next time, switch the single-motor driving working condition to the transmission chain with the smaller damage value.

[0055] In some embodiments, the size of the preset threshold is not specifically limited and can be set according to actual needs. For example, the preset threshold can be set to 3%, 5% and the like.

[0056] Compared with the related art, the embodiment of the present application has at least the following advantages: by acquiring the first damage map of the first transmission chain and the second damage map of the second transmission chain, the maximum damage values of the parts of the first transmission chain and the second transmission chain under different preset working conditions can be known. In the actual operation process of the dual-motor drive gearbox, by acquiring the current working condition of the dual-motor drive gearbox, the first motor speed and the first motor torque of the first transmission chain, and the second motor speed and the second motor torque of the second transmission chain, the first damage value corresponding to the first motor speed, the first motor torque and the current working condition can be found in the first damage map, and the second damage value can be found in the second damage map in the same way, so that the service life of the first transmission chain and the second transmission chain can be determined through the first damage value and the second damage value. In the case where the difference between the first damage value and the second damage value is greater than a preset threshold, it indicates that there is a transmission chain that is damaged more under the current working condition, and by switching the single-motor driving working condition to the transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor driving requirement next time, the transmission chain with a larger damage can be prevented from being damaged due to continuous work, thereby improving the overall service life of the dual-motor drive gearbox.

[0057] Please refer to Figure 2 , Figure 2 is a step flowchart of an embodiment of the gearbox control method of the present application. The order of the steps in the flowchart can be changed according to different needs, and some steps can be omitted. The gearbox control method can be applied to the gearbox control device described above, but is not limited thereto, and the embodiments of the present application do not limit this.

[0058] The present embodiment is a further improvement of the foregoing embodiments, and the main improvement is that in the present embodiment, the cumulative damage values of the first transmission chain and the second transmission chain are also calculated, and in the case where the cumulative damage value is greater than or equal to a preset damage threshold, a maintenance reminder information is sent. In this way, the user can timely maintain the gearbox after receiving the maintenance reminder information, thereby improving the reliability of the gearbox control method.

[0059] The specific process of the present embodiment is shown in Figure 3 , including the following steps: S301, acquiring a first damage map of a first transmission chain and a second damage map of a second transmission chain.

[0060] S302, acquiring a current working condition of a dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain.

[0061] S303, determining a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed and the first motor torque.

[0062] S304, determining a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed and the second motor torque.

[0063] S305, in a case where a difference between the first damage value and the second damage value is greater than a preset threshold, switching a single-motor driving working condition to a transmission chain with a smaller damage value when a next single-motor driving demand occurs under the dual-motor driving transmission.

[0064] S301 to S305 of the embodiment are similar to S101 to S105 of the foregoing embodiment, and details are not repeated here.

[0065] S306, calculating a first cumulative damage value of the first transmission chain according to the first damage value, and calculating a second cumulative damage value of the second transmission chain according to the second damage value.

[0066] S307, in a case where the first cumulative damage value and / or the second cumulative damage value is greater than or equal to a preset damage threshold, sending a maintenance reminding information.

[0067] In some embodiments, the size of the preset damage threshold is not specifically limited, and can be set according to actual needs, for example, can be set to 90%, 95%, 100%, etc.

[0068] In some embodiments, the maintenance reminding information can include specific parts of the transmission chain to be maintained. In this way, the user can determine the current condition of the transmission more quickly, so as to facilitate targeted maintenance of the transmission, and improve the user experience.

[0069] Compared with the related art, the embodiment of the application has at least the following advantages: by acquiring the first damage map of the first transmission chain and the second damage map of the second transmission chain, the maximum damage values of the parts of the first transmission chain and the second transmission chain under different preset working conditions can be known. In the actual operation process of the dual-motor drive gearbox, by acquiring the current working condition of the dual-motor drive gearbox, the first motor speed and the first motor torque of the first transmission chain, and the second motor speed and the second motor torque of the second transmission chain, the first damage value corresponding to the first motor speed, the first motor torque and the current working condition can be found in the first damage map, and the second damage value can be found in the second damage map in the same way, so that the service life of the first transmission chain and the second transmission chain can be determined through the first damage value and the second damage value. In the case where the difference between the first damage value and the second damage value is greater than a preset threshold, it indicates that there is a transmission chain that is damaged more under the current working condition, and by switching the single-motor drive working condition to the transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor drive requirement next time, the transmission chain with greater damage can be prevented from being damaged due to continuous work, thereby improving the overall service life of the dual-motor drive gearbox.

[0070] Based on the same idea as the gearbox control method in the above embodiment, the application also provides a gearbox control device which can be used to execute the above gearbox control method. For ease of illustration, only the parts related to the embodiments of the application are shown in the structural schematic diagram of the gearbox control device embodiment, and those skilled in the art can understand that the illustrated structure does not constitute a limitation on the device, and can include more or fewer components than the illustrated, or combine certain components, or different component arrangements.

[0071] As shown in Figure 4 The gearbox control device 40 includes a first acquisition module 401, a second acquisition module 402, a first determination module 403, a second determination module 404 and a control module 405. In some embodiments, the above modules can be programmable software instructions stored in a memory and executable by a processor. It can be understood that in other embodiments, the above modules can also be program instructions or firmware fixed in the processor.

[0072] The first acquisition module 401 is configured to acquire a first damage map of the first transmission chain and a second damage map of the second transmission chain. The first damage map is used to record first maximum damage values of all parts of the first transmission chain corresponding to different motor torques and motor speeds under N preset working conditions. The second damage map is used to record second maximum damage values of all parts of the second transmission chain corresponding to different motor torques and motor speeds under N preset working conditions. N is an integer greater than 1. The second acquisition module 402 is configured to acquire a current working condition of the dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain. The first determination module 403 is configured to determine a first damage value of the first transmission chain in the current working condition according to the first damage atlas, the first motor speed and the first motor torque. The second determination module 404 is configured to determine a second damage value of the second transmission chain in the current working condition according to the second damage atlas, the second motor speed and the second motor torque. The control module 405 is configured to switch a single-motor drive working condition to a transmission chain with a smaller damage value when a difference between the first damage value and the second damage value is greater than a preset threshold value and the dual-motor drive gearbox has a single-motor drive demand next time.

[0073] The gearbox control device 40 provided by the above embodiment can implement the technical solutions described in the above gearbox control method embodiments, and the principles of the implementation of the above modules or units can be referred to the corresponding content in the above gearbox control method embodiments, which will not be described here.

[0074] Please refer to Figure 5 , Figure 5 is a schematic diagram of an embodiment of an electronic device. In the embodiment of the present application, the electronic device 500 includes a processor 501, a memory 502, and a display 503. Figure 5 Only part of the components of the electronic device 500 are shown, but it should be understood that it is not required to implement all the shown components, and more or fewer components can be implemented instead.

[0075] The processor 501 can be a central processing unit (CPU), a microprocessor, or other data processing chip in some embodiments, used to run the program code or process data stored in the memory 502, such as the gearbox control method in the present application.

[0076] In some embodiments, the processor 501 can be a single server or a group of servers. The group of servers can be centralized or distributed. In some embodiments, the processor 501 can be local or remote. In some embodiments, the processor 501 can be implemented on a cloud platform. In an embodiment, the cloud platform can include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an inter-internal, a multiple cloud, etc., or any combination of the above.

[0077] The memory 502 can be an internal storage unit of the electronic device 500, such as a hard disk or a memory of the electronic device 500 in some embodiments. The memory 502 can also be an external storage device of the electronic device 500, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like, equipped on the electronic device 500 in other embodiments.

[0078] Further, the memory 502 can include both an internal storage unit and an external storage device of the electronic device 500. The memory 502 is used to store application software and various data installed on the electronic device 500.

[0079] The display 503 can be an LED display, a liquid crystal display, a touch liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, and the like in some embodiments. The display 503 is used to display information of the electronic device 500 and to display a visualized user application program. The components 501-503 of the electronic device 500 communicate with each other through a system bus.

[0080] In an embodiment, when the processor 501 executes the gearbox control program in the memory 502, the following steps can be implemented: obtain a first damage map of the first transmission chain and a second damage map of the second transmission chain, wherein the first damage map is used to record first maximum damage values of all parts corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage map is used to record second maximum damage values of all parts corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, N is an integer greater than 1; obtain a current working condition of the dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain; determine a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed and the first motor torque; determine a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed and the second motor torque; in the case that the difference between the first damage value and the second damage value is greater than a preset threshold, switch the single-motor drive working condition to the transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor drive requirement next time.

[0081] It should be understood that, in addition to the above functions, the processor 501 can also implement other functions when executing the gearbox control program in the memory 502. For details, refer to the description of the corresponding method embodiments.

[0082] Further, the type of the electronic device 500 referred to in the embodiments of the present application is not specifically limited, and the electronic device 500 can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop, or the like. Exemplary embodiments of the portable electronic device include, but are not limited to, a portable electronic device running an IOS, android, microsoft, or other operating system. The portable electronic device described above can also be other portable electronic devices, such as a laptop having a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present application, the electronic device 500 can also be a desktop computer having a touch-sensitive surface (e.g., a touch panel).

[0083] Further, the type of the electronic device 500 referred to in the embodiments of the present application is preferably a remote information control unit (TCU) or a vehicle control unit (VCU), and the type of the electronic device 500 is not specifically limited in the embodiments, and can be set according to actual needs.

[0084] Correspondingly, the embodiments of the present application also provide a computer-readable storage medium for storing computer-readable programs or instructions, which, when executed by a processor, can implement the steps or functions in the gearbox control method provided by the above method embodiments.

[0085] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing related hardware (such as a processor, a controller, etc.) to complete. The computer program can be stored in a computer-readable storage medium. The computer-readable storage medium includes a magnetic disk, an optical disk, a read-only memory, or a random access memory, etc.

[0086] The gearbox control method, device, electronic device, and storage medium provided by the present application are described in detail above, and specific examples are applied to the principles and implementation modes of the present application. The above description of the embodiments is only to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range can be changed; in conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method of controlling a gearbox, characterized in that, The application is applied to a dual-motor drive gearbox with a first transmission chain and a second transmission chain; The method comprises: obtaining a first damage atlas of the first transmission chain and a second damage atlas of the second transmission chain, wherein the first damage atlas is used to record first maximum damage values of all parts corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage atlas is used to record second maximum damage values of all parts corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, and N is an integer greater than 1; obtaining a current working condition of the dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain; determining a first damage value of the first transmission chain under the current working condition according to the first damage atlas, the first motor speed and the first motor torque; determining a second damage value of the second transmission chain under the current working condition according to the second damage atlas, the second motor speed and the second motor torque; in the case that the difference between the first damage value and the second damage value is greater than a preset threshold, switching a single-motor drive working condition to a transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor drive requirement next time.

2. The transmission control method according to claim 1, characterized by, Before the first damage atlas of the first transmission chain is obtained, the method further comprises: obtaining a bench load spectrum of the dual-motor drive gearbox, wherein the bench load spectrum is used to record motor torques, motor speeds and bench time of the dual-motor drive gearbox driven by different transmission chains under different gears; obtaining a first reference damage percentage set of each part on the first transmission chain according to the bench load spectrum; the first damage atlas of the first transmission chain is obtained by: obtaining a first damage percentage set of all parts of the first transmission chain under N preset working conditions; calculating the first damage atlas according to the first reference damage percentage set and the first damage percentage set.

3. The transmission control method according to claim 2, characterized by, the first reference damage percentage set of each part on the first transmission chain is obtained according to the bench load spectrum, comprising: establishing a structure simulation model of the dual-motor drive gearbox; importing the bench load spectrum into the structure simulation model to obtain the first reference damage percentage set.

4. The transmission control method according to claim 2, characterized by, the first damage percentage set of all parts of the first transmission chain under N preset working conditions is obtained by: for each preset working condition, calculating a first damage percentage sub-set of each part of the first transmission chain under different motor torques and motor speeds; regarding N first damage percentage sub-sets corresponding to N preset working conditions as the first damage percentage set.

5. The transmission control method according to claim 4, characterized by, the first damage atlas is calculated according to the first reference damage percentage set and the first damage percentage set, comprising: for each preset working condition, determining the maximum damage percentage in the first damage percentage sub-set; determine a target reference damage percentage corresponding to a target part in the first reference damage percentage set, wherein the target part is a part corresponding to the maximum damage percentage; calculate a maximum loss value corresponding to the preset working condition according to the maximum damage percentage and the target reference damage percentage; use the maximum loss values corresponding to the N preset working conditions as the first damage map.

6. The transmission control method according to claim 1, characterized by, The preset working condition at least includes a preset working temperature, a preset gearbox gear position, and a preset gearbox running time length.

7. The gearbox control method according to any one of claims 1 to 6, characterized in that, The method further includes: calculate a first cumulative damage value of the first transmission chain according to the first damage value; calculate a second cumulative damage value of the second transmission chain according to the second damage value; in a case where the first cumulative damage value and / or the second cumulative damage value is greater than or equal to a preset damage threshold, send a maintenance reminder information.

8. A gearbox control device, characterized by The application is applied to a dual-motor drive gearbox with a first transmission chain and a second transmission chain. The gearbox control device includes a first acquisition module, a second acquisition module, a first determination module, a second determination module, and a control module. The first acquisition module is used to acquire a first damage map of the first transmission chain and a second damage map of the second transmission chain, wherein the first damage map is used to record first maximum damage values of all parts corresponding to different motor torques and motor speeds of the first transmission chain under N preset working conditions; the second damage map is used to record second maximum damage values of all parts corresponding to different motor torques and motor speeds of the second transmission chain under N preset working conditions, and N is an integer greater than 1. The second acquisition module is used to acquire a current working condition of the dual-motor drive gearbox, a first motor speed and a first motor torque of the first transmission chain, and a second motor speed and a second motor torque of the second transmission chain. The first determination module is used to determine a first damage value of the first transmission chain under the current working condition according to the first damage map, the first motor speed, and the first motor torque. The second determination module is used to determine a second damage value of the second transmission chain under the current working condition according to the second damage map, the second motor speed, and the second motor torque. The control module is used to switch a single-motor drive working condition to a transmission chain with a smaller damage value when the dual-motor drive gearbox has a single-motor drive demand next time in a case where a difference between the first damage value and the second damage value is greater than a preset threshold.

9. An electronic device comprising a processor and a memory, the electronic device comprising: The memory is used to store instructions, and the processor is used to call the instructions in the memory, so that the electronic device executes the gearbox control method in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and when the computer instructions run on an electronic device, the electronic device executes the gearbox control method in any one of claims 1 to 7.

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