A method for controlling abnormal noise of starting assembly of dual-motor hybrid vehicle based on motor control

Abstract

The present invention discloses a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control, and belongs to the field of automotive power control. S100, MCU identifies the speed fluctuation of the generator; S200, after the MCU completes the identification of the speed characteristics of the generator, it optimizes the torque model according to the speed characteristics; S300, the torque model is obtained, and the MCU suppresses the speed fluctuation of the assembly through the torque model. The present invention reduces the manufacturing cost and weight of the whole vehicle, has greater advantages in general adaptability, can be achieved based on the current hybrid vehicle motor control accuracy, has outstanding adaptability, has good survival activity, and has promotion value.

Description

Technical Field

[0001] The invention relates to a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control, and belongs to the field of automobile power control. Background Art

[0002] For the dual-motor hybrid configuration, the engine starter structure is eliminated due to the vehicle structure design, and the engine is directly driven by the generator to start. The difference between the generator inertia and the engine crankshaft inertia causes the generator and the engine to fluctuate in speed during the process of starting the engine under the stimulation of the engine cylinder pressure and the shock absorber in the structure itself, which causes the transmission gear and spline to knock in reverse and produce abnormal noise, seriously affecting the customer's driving experience.

[0003] Due to the fixed hardware structure (the inertia of the two is difficult to modify, and the existence of buffer shock absorbers is inevitable), the engine control strategy is relatively rough, and the accuracy and rapid response performance are insufficient. Based on the advantages of precise and rapid control of the motor from the engine control perspective, the active control of the motor is used to suppress the speed fluctuations of the generator and engine during the starting process to solve the problem of abnormal starting noise in the dual-motor hybrid configuration.

[0004] The main solution to this problem is to modify the hardware. Based on the future development direction of hybrid vehicles, the improvement of engine efficiency will inevitably lead to an increase in factors such as engine cylinder pressure that stimulate abnormal starting noise, which will in turn have a more severe impact on starting problems. To compensate for the excitation factors, more modifications to the hardware structure are needed. Summary of the invention

[0005] The present invention proposes a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control, so as to solve the problems existing in the prior art.

[0006] A dual-motor hybrid power system includes an engine, a generator, a torsional vibration damper, a reduction gear mechanism, a clutch, a drive motor and a differential. The engine is transmission-connected to the generator via the torsional vibration damper and the reduction gear mechanism, and the reduction gear mechanism, the clutch, the drive motor and the differential are transmission-connected in sequence.

[0007] A method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control is provided. Based on the above dual-motor hybrid system, the method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control comprises the following steps:

[0008] S100 and MCU identify the characteristics of the generator speed signal;

[0009] S200, after the MCU completes the identification of the speed signal characteristics of the generator, the torque model optimization is performed based on the signal characteristics;

[0010] S300: Obtain a torque model, and the MCU suppresses assembly speed fluctuations through the torque model.

[0011] Furthermore, in S100, the following steps are included:

[0012] S110: When the vehicle is started at a stationary position or at a low speed, the generator acts as a starter to drive the engine to start;

[0013] S120, the generator output torque increases first and then decreases, and after the engine is ignited, the generator outputs negative torque, and the generator is driven by the engine to generate electricity;

[0014] S130, in the generator torque reduction stage, the MCU identifies the generator speed data, and identifies and optimizes the generator speed data;

[0015] S140: Process the optimized generator speed data to identify the generator speed characteristic signal.

[0016] Furthermore, in S200, the following steps are included:

[0017] S210, performing smooth liner processing on the generator speed characteristic signal;

[0018] S220, performing modulation processing according to the processed result as a speed calculation value;

[0019] S230, adjusting the time delay caused by MCU calculation for the speed calculation value as the input parameter speed to toque data for the generator torque model control;

[0020] S240. Under the existing MCU torque model structure, the parameter speed to toque data is added to the output value of the original model, and the calculation result is used as the generator control parameter to control the generator.

[0021] Further, in S230, the method for adjusting the time delay caused by the MCU calculation is:

[0022] S231, analyzing the speed time characteristics of the Speed ​​calculation value, and calculating the real-time period t0;

[0023] S232, analyzing and obtaining the time t1 taken by the theoretical MCU to process the generator speed to the maximum value and input it into the original torque model;

[0024] S233, t0 / 2-t1 is the time to be adjusted. When inputting, delay the Speed ​​calculation value by the time to be adjusted, and then execute S240.

[0025] A dual-motor hybrid vehicle starting assembly abnormal noise control system based on motor control is applied to the above-mentioned dual-motor hybrid vehicle starting assembly abnormal noise control method based on motor control. The starting assembly abnormal noise control system includes a speed feature recognition module, a torque model optimization module and an assembly speed fluctuation suppression module. The speed feature recognition module, the torque model optimization module and the assembly speed fluctuation suppression module are connected in sequence, wherein:

[0026] Speed ​​fluctuation identification module, used by MCU to identify the speed characteristics of the generator;

[0027] The torque model optimization module is used to optimize the torque model according to the speed characteristics after the MCU completes the recognition of the speed characteristics of the generator;

[0028] The torque model is obtained and used by the MCU to suppress the speed fluctuation of the assembly through the torque model.

[0029] Furthermore, the speed characteristic recognition module includes an engine drive unit, a generator drive unit, a generator speed data recognition and optimization unit and a generator speed characteristic signal recognition unit, wherein:

[0030] The engine drag unit is used to start the vehicle at a fixed position or at a low speed. The generator acts as a starter to drag the engine to start.

[0031] The generator drag unit is used for the generator to output negative torque after the engine is ignited, and the generator is dragged by the engine to generate electricity;

[0032] The generator speed data identification and optimization unit is used for the MCU to identify the generator speed data during the generator torque reduction stage, and to identify and optimize the generator speed data;

[0033] The generator speed characteristic signal recognition unit is used to perform characteristic processing on the optimized generator speed data and recognize the generator speed characteristic signal.

[0034] Furthermore, the torque model optimization module includes a generator speed characteristic signal processing unit, a speed calculation value generating unit, a speed to toque data generating unit and a generator control parameter generating unit, and the generator speed characteristic signal processing unit, the speed calculation value generating unit, the speed to toque data generating unit and the generator control parameter generating unit are connected in sequence, wherein,

[0035] A generator speed characteristic signal processing unit, used for performing smooth liner processing on the generator speed characteristic signal;

[0036] A speed calculation value generating unit is used to perform modulation processing according to the result processed by the generator speed characteristic signal processing unit to obtain the result as the speed calculation value;

[0037] A speed to toque data generating unit, used for adjusting the time delay caused by the MCU calculation for the speed calculation value, as an input parameter speed to toque data for the generator torque model control;

[0038] The generator control parameter generating unit is used to add the parameter speed totoque data to the output value of the original model under the existing MCU torque model structure, and the calculation result is used as the generator control parameter to control the generator.

[0039] A storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control.

[0040] A vehicle includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the above-mentioned method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control.

[0041] Beneficial effects of the invention: The invention proposes a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control. Compared with the modification of the hardware structure in the prior art, this solution not only reduces the manufacturing cost and weight of the entire vehicle, but also has greater advantages in general adaptability. It can be achieved based on the current hybrid vehicle motor control accuracy, has outstanding adaptability, good survival activity, and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a dual-motor hybrid power system of the present invention;

[0043] Figure 2 The present invention is a method flow chart of a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control.

[0044] Among them, 1 is the engine, 2 is the generator, 3 is the torsion damper, 4 is the reduction gear mechanism, 5 is the clutch, 6 is the drive motor, and 7 is the differential. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1, reference Figure 1-Figure 2 As shown, the present invention proposes a dual-motor hybrid power system, which includes an engine 1, a generator 2, a torsional damper 3, a reduction gear mechanism 4, a clutch 5, a drive motor 6 and a differential 7. The engine 1 is transmission-connected to the generator 2 via the torsional damper 3 and the reduction gear mechanism 4, and the reduction gear mechanism 4, the clutch 5, the drive motor 6 and the differential 7 are transmission-connected in sequence.

[0047] Embodiment 2: A method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control. Based on the above dual-motor hybrid system, the method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control comprises the following steps:

[0048] S100 and MCU identify the speed characteristics of the generator;

[0049] S200, after the MCU completes the identification of the speed characteristics of the generator, the torque model optimization is performed according to the characteristic speed;

[0050] S300: Obtain a torque model, and the MCU suppresses assembly speed fluctuations through the torque model.

[0051] Embodiment 3: Further, in S100, the following steps are included:

[0052] S110: When the vehicle is started at a stationary position or at a low speed, the generator acts as a starter to drive the engine to start;

[0053] S120, the generator output torque increases first and then decreases, and after the engine is ignited, the generator outputs negative torque, and the generator is driven by the engine to generate electricity;

[0054] S130, in the generator torque reduction stage, the MCU identifies the generator speed data, and identifies and optimizes the generator speed data;

[0055] S140: Perform feature processing on the optimized generator speed data to identify the generator speed feature signal.

[0056] Embodiment 4: Further, in S200, the following steps are included:

[0057] S210, performing smooth liner processing on the generator speed characteristic signal;

[0058] S220, performing modulation processing according to the processed result as a speed calculation value;

[0059] S230, adjusting the time delay caused by MCU calculation for the speed calculation value as the input parameter speed to toque data for the generator torque model control;

[0060] S240. Under the existing MCU torque model structure, the parameter speed to toque data is added to the output value of the original model, and the calculation result is used as the generator control parameter to control the generator.

[0061] Embodiment 5: Further, in S230, the method for adjusting the time delay caused by MCU calculation is:

[0062] S231, analyzing the time characteristics of the Speed ​​calculation value, and calculating the real-time period t0;

[0063] S232, analyzing and obtaining the time t1 taken by the theoretical MCU to process the generator speed to the maximum value and input it into the original torque model;

[0064] S233, t0 / 2-t1 is the time to be adjusted. When inputting, the Speed ​​calculation value is delayed by the time to be adjusted, and then S240 is executed. The torque model finally reflected can play the effect of suppressing the fluctuation of the assembly speed.

[0065] Embodiment 6: A dual-motor hybrid vehicle starting assembly abnormal noise control system based on motor control, applied to the above-mentioned dual-motor hybrid vehicle starting assembly abnormal noise control method based on motor control, the starting assembly abnormal noise control system includes a speed fluctuation identification module, a torque model optimization module and an assembly speed fluctuation suppression module, the speed fluctuation identification module, the torque model optimization module and the assembly speed fluctuation suppression module are connected in sequence, wherein,

[0066] Speed ​​fluctuation identification module, used by MCU to identify the speed characteristics of the generator;

[0067] The torque model optimization module is used to optimize the torque model according to the characteristic speed after the MCU has completed the recognition of the speed characteristics of the generator;

[0068] The torque model is obtained and used by the MCU to suppress the speed fluctuation of the assembly through the torque model.

[0069] Embodiment 7: Further, the speed fluctuation identification module includes an engine drive unit, a generator drive unit, a generator speed data identification optimization unit and a generator speed characteristic signal identification unit, wherein:

[0070] The engine drag unit is used to start the vehicle at a fixed position or at a low speed. The generator acts as a starter to drag the engine to start.

[0071] The generator drag unit is used for the generator to output negative torque after the engine is ignited, and the generator is dragged by the engine to generate electricity;

[0072] The generator speed data identification and optimization unit is used for the MCU to identify the generator speed data during the generator torque reduction stage, and to identify and optimize the generator speed data;

[0073] The generator speed characteristic signal recognition unit is used to perform characteristic processing on the optimized generator speed data and recognize the generator speed characteristic signal.

[0074] Embodiment 8: Further, the torque model optimization module includes a generator speed characteristic signal processing unit, a speed calculation value generating unit, a speed to toque data generating unit and a generator control parameter generating unit, and the generator speed characteristic signal processing unit, the speed calculation value generating unit, the speed to toque data generating unit and the generator control parameter generating unit are connected in sequence, wherein:

[0075] A generator speed characteristic signal processing unit, used for performing smooth liner processing on the generator speed characteristic signal;

[0076] A speed calculation value generating unit is used to perform modulation processing according to the result processed by the generator speed characteristic signal processing unit to obtain the result as the speed calculation value;

[0077] A speed to toque data generating unit, used for adjusting the time delay caused by the MCU calculation for the speed calculation value, as an input parameter speed to toque data for the generator torque model control;

[0078] The generator control parameter generating unit is used to add the parameter speed totoque data to the output value of the original model under the existing MCU torque model structure, and the calculation result is used as the generator control parameter to control the generator.

[0079] Embodiment 9: A storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control is implemented.

[0080] Embodiment 10: A vehicle comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-mentioned method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control.

[0081] Compared with the modification of hardware structure, this solution not only reduces the manufacturing cost and weight of the whole vehicle, but also has greater advantages in general adaptability. It can be achieved based on the current hybrid vehicle motor control accuracy, has outstanding adaptability, good survival activity, and promotion value.

[0082] The memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the method described in the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0083] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0084] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in a processor for execution. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0085] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

Claims

1. A method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control, based on a dual-motor hybrid system, the dual-motor hybrid system comprising an engine (1), a generator (2), a torsional damper (3), a reduction gear mechanism (4), a clutch (5), a drive motor (6) and a differential (7), the engine (1) being transmission-connected to the generator (2) via the torsional damper (3) and the reduction gear mechanism (4), the reduction gear mechanism (4), the clutch (5), the drive motor (6) and the differential (7) being transmission-connected in sequence, characterized in that: The method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control comprises the following steps: S100 and MCU identify the speed characteristics of the generator; S200, after the MCU completes the identification of the speed characteristics of the generator, the torque model optimization is performed according to the speed characteristics; In S200, the following steps are included: S210, optimizing the generator speed characteristic signal; S220, performing modulation processing according to the processed result as speed calculation value; S230, adjusting the time delay caused by MCU calculation for the speed calculation value as an input parameter speedto toque data for generator torque model control; S240, under the existing MCU torque model structure, adding the parameter speedto toque data to the output value of the original model, and using the calculation result as the generator control parameter to control the generator; S300: Obtain a torque model, and the MCU suppresses assembly speed fluctuations through the torque model.

2. The method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control according to claim 1, characterized in that: In S100, the following steps are included: S110: When the vehicle is started at a stationary position or at a low speed, the generator acts as a starter to drive the engine to start; S120, the generator output torque increases first and then decreases, and after the engine is ignited, the generator outputs negative torque, and the generator is driven by the engine to generate electricity; S130, in the generator torque reduction stage, the MCU identifies the generator speed data, and identifies and optimizes the generator speed data; S140: Process the optimized generator speed data to identify a generator speed characteristic signal.

3. The method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control according to claim 1, characterized in that: In S230, the method for adjusting the time delay caused by the MCU calculation is: S231, screening and analyzing the Speed ​​calculation value, and calculating the real-time cycle t0; S232, analyzing and obtaining the time t1 taken by the theoretical MCU to process the generator speed to the maximum value and input it into the original torque model; In S233, t0 / 2-t1 is the time to be adjusted. When inputting, the Speed ​​calculation value is delayed by the time to be adjusted, and then S240 is executed.

4. A dual-motor hybrid vehicle starting assembly abnormal noise control system based on motor control, implementing a dual-motor hybrid vehicle starting assembly abnormal noise control method based on motor control according to any one of claims 1 to 3, characterized in that: The abnormal noise control system of the starting assembly includes a speed fluctuation identification module, a torque model optimization module and a speed fluctuation suppression module of the assembly, wherein the speed fluctuation identification module, the torque model optimization module and the speed fluctuation suppression module of the assembly are connected in sequence, wherein: The speed fluctuation identification module is used for the MCU to identify the speed fluctuation of the generator; The torque model optimization module is used to optimize the torque model according to the fluctuation speed after the MCU completes the identification of the speed fluctuation of the generator; The obtained torque model is used by the MCU to suppress the fluctuation of the assembly speed through the torque model.

5. The abnormal noise control system of the starting assembly of a dual-motor hybrid vehicle based on motor control according to claim 4, characterized in that: The speed fluctuation identification module includes an engine drive unit, a generator drive unit, a generator speed data identification optimization unit and a generator speed fluctuation signal identification unit, wherein: The engine drag unit is used when the vehicle is started at a stationary or low speed condition, and the generator acts as a starter to drag the engine to start; The generator drag unit is used to make the generator output negative torque after the engine is ignited, and the generator is dragged by the engine to generate electricity; The generator speed data identification and optimization unit is used for the MCU to identify the generator speed data during the generator torque reduction stage, and to identify and optimize the generator speed data; The generator speed fluctuation signal identification unit is used to optimize the processing of the optimized generator speed data and identify the generator speed fluctuation signal.

6. The abnormal noise control system of the starting assembly of a dual-motor hybrid vehicle based on motor control according to claim 5, characterized in that: The torque model optimization module includes a generator speed signal processing unit, a speed calculation value generating unit, a speed to toque data generating unit and a generator control parameter generating unit, and the generator speed fluctuation signal processing unit, the speed calculation value generating unit, the speed to toque data generating unit and the generator control parameter generating unit are connected in sequence, wherein: The generator speed fluctuation signal processing unit is used to perform smoothlinear processing on the generator speed fluctuation signal; The speed calculation value generating unit is used to perform modulation processing according to the result processed by the generator speed signal processing unit to use it as the speed calculation value; The speed to toque data generating unit is used to adjust the time delay caused by the MCU calculation for the speed calculation value as the input parameter speed totoque data for the generator torque model control; The generator control parameter generating unit is used to add the parameter speedto toque data to the output value of the original model under the existing MCU torque model structure, and the calculation result is used as the generator control parameter to control the generator.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

8. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for controlling abnormal noise of a starting assembly of a dual-motor hybrid vehicle based on motor control as described in any one of claims 1 to 3.

Images