Vehicle harmonic injection strategy setting method, device, equipment and storage medium

Abstract

The present invention discloses a vehicle harmonic injection strategy setting method, device, equipment and storage medium, belonging to the field of vehicle NVH technology. The present invention obtains the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determines the motor electromagnetic order noise curve according to the in-vehicle noise data; compares the motor electromagnetic order noise curve with the target order noise curve to determine the problem condition; and determines the harmonic injection strategy according to the problem condition and the motor electromagnetic noise order of the problem condition. In this way, the in-vehicle noise data is compared with the target order noise curve under the preset ideal condition, so as to lock the problem condition that needs to be optimized for noise, and then the harmonic injection strategy is set for the problem condition, so as to achieve motor noise optimization without the need for bench testing.

Description

Technical Field

[0001] The present invention relates to the field of vehicle NVH technology, and in particular to a vehicle harmonic injection strategy setting method, device, equipment and storage medium. Background Art

[0002] With the continuous development of the new energy vehicle industry, new energy vehicle technology has become a research hotspot for major automakers. Compared with traditional vehicles, the drive system of new energy vehicles has become an electric drive system and a hybrid system. In pure electric driving conditions, due to the lack of engine noise masking, the problem of motor electromagnetic whistling is prominent, which seriously affects the driving experience. The current method is to conduct NVH bench tests of hybrid dual-motor transmissions or electric drive assemblies in an anechoic chamber to perform harmonic injection calibration, which is expensive.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle harmonic injection strategy setting method, device, equipment and storage medium, aiming to solve the technical problem of high cost of motor harmonic injection calibration in the prior art.

[0005] To achieve the above object, the present invention provides a vehicle harmonic injection strategy setting method, the vehicle harmonic injection strategy setting method comprising the following steps:

[0006] Acquire in-vehicle noise data of a vehicle to be processed under a motor noise test condition, and determine a motor electromagnetic order noise curve according to the in-vehicle noise data;

[0007] Comparing the motor electromagnetic order noise curve with the target order noise curve to determine the problem operating condition;

[0008] A harmonic injection strategy is determined according to the problematic operating condition and the motor electromagnetic noise order of the problematic operating condition.

[0009] Optionally, the step of obtaining the in-vehicle noise data of the vehicle to be processed under a motor noise test condition includes:

[0010] Control the vehicle to be processed to perform a test under the motor noise test condition to obtain a noise signal, motor torque and speed signal;

[0011] Obtaining in-vehicle noise data according to the noise signal, the motor torque and the speed signal;

[0012] The motor electromagnetic order noise curve is determined according to the in-vehicle noise data.

[0013] Optionally, the controlling the vehicle to be processed to be tested under a motor noise test condition to obtain a noise signal, a motor torque and a speed signal includes:

[0014] The vehicle to be processed is controlled to accelerate on the target road surface according to each preset throttle opening, and the vehicle to be processed is controlled to glide on the target road surface according to each preset energy recovery torque, so as to obtain a noise signal, a motor torque and a speed signal.

[0015] Optionally, comparing the motor electromagnetic order noise curve with a target order noise curve to determine the problematic operating condition includes:

[0016] Obtain the target order noise curve under ideal conditions;

[0017] Comparing the target order noise curve with the motor electromagnetic order noise curve to obtain a noise abnormality area;

[0018] A problematic operating condition is determined according to the abnormal noise area, where the problematic operating condition is a condition in which the electromagnetic order noise value of the motor exceeds the target noise value.

[0019] Optionally, determining the harmonic injection strategy according to the problematic operating condition and the motor electromagnetic noise order of the problematic operating condition includes:

[0020] Determining the order of injected harmonic current according to the order of electromagnetic noise of the motor in the problematic working condition;

[0021] According to the problem working condition, the vehicle to be processed is controlled to travel at a preset starting motor torque and a preset starting motor speed corresponding to the problem working condition, and the current amplitude and phase of the injected harmonics are optimized according to the motor electromagnetic order noise to obtain a target current amplitude and a target current phase corresponding to the preset starting motor torque and the preset starting motor speed;

[0022] The current amplitude and current phase are calibrated according to the motor torque range and motor speed range of the problem working condition, and the harmonic injection strategy is determined according to the calibration results.

[0023] Optionally, the optimizing of the current amplitude and phase of the harmonics injected according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed includes:

[0024] Determine a preset starting motor torque and a preset starting motor speed according to the problem working condition, perform current phase calibration on the vehicle to be processed, and obtain a target current phase corresponding to the lowest motor electromagnetic order noise;

[0025] The current amplitude of the vehicle to be processed is calibrated according to the target current phase to obtain a target current amplitude at which the electromagnetic order noise of the motor meets the target value.

[0026] Optionally, the current amplitude and current phase calibration is performed according to the motor torque range and motor speed range of the problem working condition, including:

[0027] Keeping the preset starting motor torque unchanged, and adjusting the preset motor speed with a preset step size, calibrating the current amplitude and current phase corresponding to the injected harmonic current order, and obtaining the target current amplitude and target current phase corresponding to the motor speed range of the problem working condition under the preset starting motor torque;

[0028] The motor torque is adjusted with a preset step size, and the preset motor speed is adjusted with a preset step size. The current amplitude and current phase of the injected harmonic current order are calibrated to obtain the motor torque corresponding to the problem working condition and the target current amplitude and target current phase corresponding to the motor speed range.

[0029] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle harmonic injection strategy setting device, the vehicle harmonic injection strategy setting device comprising:

[0030] A data acquisition module is used to obtain the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determine the motor electromagnetic order noise curve according to the in-vehicle noise data;

[0031] A problem determination module, used for comparing the motor electromagnetic order noise curve with a target order noise curve to determine a problem operating condition;

[0032] A strategy setting module is used to determine a harmonic injection strategy according to the problematic operating condition and the motor electromagnetic noise order of the problematic operating condition.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also proposes a vehicle harmonic injection strategy setting device, which includes: a memory, a processor, and a vehicle harmonic injection strategy setting program stored in the memory and running on the processor, and the vehicle harmonic injection strategy setting program is configured to implement the vehicle harmonic injection strategy setting method described above.

[0034] In addition, to achieve the above objectives, the present invention also proposes a storage medium, on which a vehicle harmonic injection strategy setting program is stored. When the vehicle harmonic injection strategy setting program is executed by a processor, the vehicle harmonic injection strategy setting method described above is implemented.

[0035] The present invention obtains the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determines the motor electromagnetic order noise curve according to the in-vehicle noise data; compares the motor electromagnetic order noise curve with the target order noise curve to determine the problem condition; and determines the harmonic injection strategy according to the problem condition and the motor electromagnetic noise order of the problem condition. In this way, the in-vehicle noise data is compared with the target order noise curve under the preset ideal condition, thereby locking the problem condition that needs to be optimized for noise, and then setting the harmonic injection strategy for the problem condition, thereby achieving motor noise optimization without the need for bench testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a vehicle harmonic injection strategy setting device in a hardware operating environment involved in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a flow chart of a first embodiment of a method for setting a vehicle harmonic injection strategy according to the present invention;

[0038] Figure 3 A schematic diagram of 24th-order or 48th-order noise and the corresponding motor speed and torque range in an embodiment of a vehicle harmonic injection strategy setting method of the present invention;

[0039] Figure 4 A schematic flow chart of a second embodiment of a method for setting a vehicle harmonic injection strategy according to the present invention;

[0040] Figure 5 A flow chart of setting a harmonic injection strategy in an embodiment of a vehicle harmonic injection strategy setting method of the present invention;

[0041] Figure 6 A schematic diagram showing the comparison before and after harmonic injection in an embodiment of a vehicle harmonic injection strategy setting method of the present invention;

[0042] Figure 7 This is a structural block diagram of the first embodiment of the vehicle harmonic injection strategy setting device of the present invention.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0045] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a device for setting a vehicle harmonic injection strategy in a hardware operating environment according to an embodiment of the present invention.

[0046] like Figure 1 As shown, the vehicle harmonic injection strategy setting device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the vehicle harmonic injection strategy setting device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0048] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a vehicle harmonic injection strategy setting program.

[0049] exist Figure 1 In the vehicle harmonic injection strategy setting device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle harmonic injection strategy setting device of the present invention can be set in the vehicle harmonic injection strategy setting device, and the vehicle harmonic injection strategy setting device calls the vehicle harmonic injection strategy setting program stored in the memory 1005 through the processor 1001, and executes the vehicle harmonic injection strategy setting method provided in the embodiment of the present invention.

[0050] The embodiment of the present invention provides a vehicle harmonic injection strategy setting method, referring to Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of a method for setting a vehicle harmonic injection strategy according to the present invention.

[0051] In this embodiment, the vehicle harmonic injection strategy setting method includes the following steps:

[0052] Step S10: obtaining in-vehicle noise data of the vehicle to be processed under motor noise test conditions, and determining the motor electromagnetic order noise curve according to the in-vehicle noise data.

[0053] In this embodiment, the execution subject of this embodiment can be the vehicle harmonic injection strategy setting device, which has functions such as data processing, data communication and program running, and the vehicle harmonic injection strategy setting device can be a computer or other intelligent terminal with testing and data calculation. Of course, it can also be other devices with similar functions, and this implementation condition does not limit this. For the convenience of explanation, this implementation is described by taking the vehicle harmonic injection strategy setting device as an example.

[0054] It should be noted that with the continuous development of the new energy vehicle industry, new energy vehicle technology has become a research hotspot for major car companies. Compared with traditional vehicles, the drive system of new energy vehicles has become an electric drive system and a hybrid power system. In pure electric driving conditions, due to the lack of engine noise masking, the problem of motor electromagnetic whistling is prominent, which seriously affects the driving experience. The present invention relates to the field of NVH of new energy vehicles, and provides a method for setting a harmonic injection strategy for a new energy vehicle motor. The prior art is to conduct a hybrid dual-motor transmission or an electric drive assembly NVH bench test in an anechoic chamber to perform harmonic injection calibration, and the test and calibration costs are expensive. The present invention provides a method for setting a harmonic injection strategy for a new energy vehicle motor based on a whole vehicle NVH test, which quickly determines the motor harmonic injection strategy and saves test costs and development costs. The scheme of this embodiment compares the in-vehicle noise data with the target order noise curve under a pre-set ideal condition, thereby locking the problem condition that needs to be optimized for noise, and then setting the harmonic injection strategy for the problem condition, thereby achieving noise optimization without the need for a bench test. In addition, the present invention provides a method for setting a harmonic injection strategy for a new energy vehicle motor based on a whole vehicle NVH test, which quickly determines the motor harmonic injection strategy, greatly shortens the research and development cycle, and reduces development costs.

[0055] In the specific implementation, a set of harmonic injection calibration device for new energy vehicle motors can also be set in the scheme of this embodiment, including: 1) data acquisition subsystem, which refers to: an acceleration sensor arranged on the cylindrical surface of the motor, and a microphone arranged on the right ear of the driver. The microphone and the vibration acceleration sensor are connected to the vibration noise data acquisition front end through cables, and the vehicle CAN bus OBD diagnostic port is connected to the vibration noise data acquisition front end through cables to form a new energy vehicle noise signal acquisition module, which can realize the collection of vibration noise data in the new energy vehicle; 2) data processing subsystem, which processes the noise signal in the car and extracts the electromagnetic order noise of the motor from it. The motor is a sound curve, such as an 8-pole 48-slot motor, and the motor's 24th and 48th order noise curves are extracted; 3) The problem diagnosis subsystem compares the motor electromagnetic order noise curve with the motor electromagnetic order noise target curve to obtain the motor electromagnetic noise problem condition, that is, the motor speed and motor torque range where the motor electromagnetic order noise exceeds the target value; 4) The harmonic injection calibration module determines the current harmonic order that needs to be injected according to the motor electromagnetic noise order, and adjusts the current amplitude and phase of the injected harmonic for the motor torque and speed range where the motor electromagnetic order noise exceeds the target value until the motor electromagnetic order noise reaches the target, and records the current amplitude and phase of the injected harmonic at this time.

[0056] It should be understood that the in-vehicle noise data of the vehicle to be processed includes noise signals and motor torque and speed signals at different times, and is data collected by testing under motor noise test conditions.

[0057] Furthermore, in order to accurately collect the in-vehicle noise signal, step S10 includes: controlling the vehicle to be processed to be tested under motor noise test conditions to obtain noise signals, motor torque and speed signals; and obtaining in-vehicle noise data according to the noise signal, the motor torque and the speed signal.

[0058] In the specific implementation, the in-vehicle noise data includes: in-vehicle noise of new energy vehicles and motor torque and speed signals. First, the noise signal, motor torque and speed signal are obtained by testing, and then the noise signal, motor torque and speed signal are compared and stored according to the time and corresponding relationship to obtain the in-vehicle noise data.

[0059] Furthermore, in order to accurately perform testing and data collection in accordance with the requirements of the motor noise test conditions, the vehicle to be processed is controlled to be tested under the motor noise test conditions, and the steps of obtaining the noise signal, motor torque and speed signal include: controlling the vehicle to be processed to accelerate on the target road surface according to each preset throttle opening to obtain the noise signal, motor torque and speed signal; controlling the vehicle to be processed to glide on the target road surface according to each preset energy recovery torque to obtain the noise signal, motor torque and speed signal.

[0060] It should be noted that the test conditions for new energy vehicle motor noise are: the vehicle accelerates on a smooth asphalt road with throttle openings of 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% to test the motor noise and obtain the in-vehicle noise signal.

[0061] Step S20: Compare the motor electromagnetic order noise curve with the target order noise curve to determine the problematic operating condition.

[0062] It should be understood that the motor electromagnetic order noise curve obtained in the above steps is compared with the motor electromagnetic order noise target curve to obtain the motor electromagnetic noise problem working condition, that is, the motor speed and motor torque range where the motor electromagnetic order noise exceeds the target value.

[0063] Furthermore, in order to accurately determine the problem operating condition, step S20 includes: obtaining a target order noise curve under an ideal state; comparing the target order noise curve with the motor electromagnetic order noise curve to obtain a noise abnormality area; determining the problem operating condition based on the noise abnormality area, the problem operating condition being a condition in which the motor electromagnetic order noise value exceeds the target noise value.

[0064] In a specific implementation, the target order noise curve refers to the noise data that meets the NVH performance requirements of the entire vehicle.

[0065] It should be noted that if Figure 3 As shown, the motor electromagnetic order noise curve obtained previously is compared with the motor electromagnetic order noise target curve to obtain the motor electromagnetic noise problem working condition corresponding to the abnormal area, that is, the motor speed and torque range in which the motor electromagnetic order noise exceeds the target noise value.

[0066] Step S30: determining a harmonic injection strategy according to the problematic operating condition and the motor electromagnetic noise order of the problematic operating condition.

[0067] It should be understood that after the problem operating condition is determined, the noise order under the problem operating condition is determined, and then testing and adjustment are performed based on the noise order to determine the harmonic injection strategy, which includes the current amplitude and current phase of the injected harmonics corresponding to different motor torques and motor speeds.

[0068] This embodiment obtains the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determines the motor electromagnetic order noise curve based on the in-vehicle noise data; compares the motor electromagnetic order noise curve with the target order noise curve to determine the problem condition; and determines the harmonic injection strategy based on the problem condition and the motor electromagnetic noise order of the problem condition. In this way, the in-vehicle noise data is compared with the target order noise curve under the preset ideal condition, thereby locking the problem condition that needs to be optimized for noise, and then setting the harmonic injection strategy for the problem condition, thereby achieving noise optimization without the need for bench testing.

[0069] refer to Figure 4 , Figure 4 It is a flow chart of a second embodiment of a method for setting a vehicle harmonic injection strategy according to the present invention.

[0070] Based on the first embodiment described above, the vehicle harmonic injection strategy setting method of this embodiment includes in step S30:

[0071] Step S301: Determine the order of injected harmonic current according to the order of the motor electromagnetic noise in the problematic working condition.

[0072] It should be noted that the motor has a specific electromagnetic noise order, which is determined by the number of motor poles and slots. The order of harmonic motor that needs to be injected is determined according to the electromagnetic noise order (for example, for an 8-pole 48-slot permanent magnet synchronous motor, to reduce the 24th order noise, the 5th and 7th harmonics need to be injected; to reduce the 48th order noise, the 11th and 13th harmonics need to be injected).

[0073] Step S302: According to the problem operating condition, the vehicle to be processed is controlled to travel at a preset starting motor torque and a preset starting motor speed corresponding to the problem operating condition, and the current amplitude and phase of the injected harmonics are optimized according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed.

[0074] It should be understood that, with respect to the current order to be injected, the current amplitude and phase of the injected harmonics are optimized to minimize the electromagnetic noise of the motor or meet the target value.

[0075] Furthermore, in order to optimize the current amplitude and phase, step S302 includes: determining a preset starting motor torque and a preset starting motor speed according to the problem working condition, calibrating the current phase of the vehicle to be processed for injecting harmonics, and obtaining a target current phase corresponding to the lowest motor electromagnetic order noise; calibrating the current amplitude of the vehicle to be processed according to the target current phase, and obtaining a target current amplitude at which the motor electromagnetic order noise meets the target value.

[0076] In the specific implementation, according to the working conditions of the motor electromagnetic noise problem, a preset starting motor torque and a preset starting motor speed are selected, starting from a lower current amplitude, and the current phase is adjusted for calibration. The current phase corresponding to the lowest value of the motor electromagnetic order noise is recorded, and then the current amplitude is adjusted to make the motor electromagnetic order noise meet the target value. At this time, the amplitude and current phase are recorded as the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed.

[0077] In the specific implementation, when calibrating the acceleration condition, since the throttle opening cannot accurately control the motor, the maximum output torque of the motor is set to the preset starting motor torque through the MCU, and the vehicle is accelerated with a 100% throttle opening to ensure that the vehicle runs with the preset starting motor torque; when calibrating the coasting condition, the vehicle drives according to the actual coasting energy recovery torque.

[0078] Step S303: calibrate the current amplitude and current phase according to the motor torque range and motor speed range of the problem working condition, and determine the harmonic injection strategy according to the calibration result.

[0079] It should be understood that the current amplitude and current phase are calibrated according to the motor torque range and motor speed range of the problem working condition, including: keeping the preset starting motor torque unchanged, and adjusting the preset motor speed with a preset step size, calibrating the current amplitude and current phase corresponding to the injected harmonic current order, and obtaining the target current amplitude and target current phase corresponding to the motor speed range of the problem working condition under the preset starting motor torque; after determining the target current amplitude and target current phase of the preset starting motor torque, modifying the motor torque with a preset step size, and repeating the above steps until the motor torque range corresponding to the problem working condition is calibrated, that is, the target current amplitude and target current phase of the injected harmonic current under different motor torques and motor speeds are obtained, and the harmonic injection strategy is obtained, such as Figure 6 As shown, injecting harmonics can improve the interior noise of the vehicle.

[0080] It should be noted that if Figure 5 As shown, the motor torque remains unchanged, and the current amplitude and phase of the injected harmonic current order of other motor speeds are adjusted with a preset step size. Based on the last recorded phase and amplitude point, the phase is first increased and decreased to determine the optimal phase with the minimum (or target) electromagnetic order noise of the motor, and then the current amplitude is adjusted to record the current amplitude and current phase at which the electromagnetic order noise of the motor meets the target value.

[0081] In the specific implementation, when calibrating the acceleration condition, since the throttle opening cannot accurately control the motor, the maximum output torque of the motor is set to the motor torque to be calibrated through the MCU, and the vehicle is accelerated with a 100% throttle opening to ensure that the vehicle runs with the motor torque to be calibrated; when calibrating the coasting condition, the vehicle drives according to the actual coasting energy recovery torque.

[0082] This embodiment determines the injection current order according to the motor electromagnetic noise order of the problem working condition; controls the vehicle to be processed to travel with the budgeted starting motor torque and preset starting motor speed corresponding to the problem working condition according to the problem working condition, and optimizes the current amplitude and phase of the injected harmonics according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and preset starting motor speed; calibrates the current amplitude and current phase according to the motor torque range and motor speed range of the problem working condition, and determines the harmonic injection strategy according to the calibration results. In this way, the current amplitude and current phase that meet the target value of the motor electromagnetic order noise are selected under low-cost conditions.

[0083] In addition, an embodiment of the present invention further proposes a storage medium, on which a vehicle harmonic injection strategy setting program is stored. When the vehicle harmonic injection strategy setting program is executed by a processor, the steps of the vehicle harmonic injection strategy setting method described above are implemented.

[0084] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0085] Reference Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the vehicle harmonic injection strategy setting device of the present invention.

[0086] like Figure 7 As shown, the vehicle harmonic injection strategy setting device proposed in the embodiment of the present invention includes:

[0087] The data acquisition module 10 is used to obtain the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determine the motor electromagnetic order noise curve according to the in-vehicle noise data.

[0088] The problem determination module 20 is used to compare the motor electromagnetic order noise curve with the target order noise curve to determine the problem working condition.

[0089] The strategy setting module 30 is used to determine the harmonic injection strategy according to the problematic working condition and the motor electromagnetic noise order of the problematic working condition.

[0090] This embodiment obtains the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determines the motor electromagnetic order noise curve based on the in-vehicle noise data; compares the motor electromagnetic order noise curve with the target order noise curve to determine the problem condition; and determines the harmonic injection strategy based on the problem condition and the motor electromagnetic noise order of the problem condition. In this way, the in-vehicle noise data is compared with the target order noise curve under the preset ideal condition, thereby locking the problem condition that needs to be optimized for noise, and then setting the harmonic injection strategy for the problem condition, thereby achieving noise optimization without the need for bench testing.

[0091] In one embodiment, the data acquisition module 10 is also used to control the vehicle to be processed to perform a test under a motor noise test condition to obtain a noise signal, a motor torque and a speed signal; and obtain the in-vehicle noise data based on the noise signal, the motor torque and the speed signal.

[0092] In one embodiment, the data acquisition module 10 is also used to control the vehicle to be processed to accelerate on the target road surface according to various preset throttle openings to obtain noise signals, motor torque and speed signals; and obtain a noise signal based on the noise signal.

[0093] In one embodiment, the problem determination module 20 is also used to obtain a target order noise curve under an ideal state; compare the target order noise curve with the motor electromagnetic order noise curve to obtain a noise abnormality area; determine the problem operating condition based on the noise abnormality area, and the problem operating condition is a condition where the motor electromagnetic order noise value exceeds the target noise value.

[0094] In one embodiment, the strategy setting module 30 is also used to determine the order of harmonic current injection according to the order of the motor electromagnetic noise of the problem working condition; according to the problem working condition, the vehicle to be processed is controlled to travel at the preset starting motor torque and the preset starting motor speed corresponding to the problem working condition, and the current amplitude and phase of the injected harmonics are optimized according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed; the current amplitude and current phase are calibrated according to the motor torque range and the motor speed range of the problem working condition, and the harmonic injection strategy is determined according to the calibration result. In one embodiment, the strategy setting module 30 is also used to determine the preset starting motor torque and the preset starting motor speed according to the problem working condition, calibrate the current phase of the vehicle to be processed, and obtain the target current phase corresponding to the lowest motor electromagnetic order noise; according to the target current phase, the current amplitude of the vehicle to be processed is calibrated to obtain the target current amplitude that meets the target value of the motor electromagnetic order noise. In one embodiment, the strategy setting module 30 is also used to keep the preset starting motor torque unchanged, and adjust the preset motor speed with a preset step size, and calibrate the current amplitude and current phase corresponding to the injected harmonic current order to obtain the target current amplitude and target current phase corresponding to the motor speed range of the problem working condition under the preset starting motor torque.

[0095] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0096] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0097] In addition, for technical details not fully described in this embodiment, reference may be made to the vehicle harmonic injection strategy setting method provided in any embodiment of the present invention, and will not be repeated here.

[0098] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system 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 system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0099] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0100] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0101] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vehicle harmonic injection strategy setting method, characterized in that: The vehicle harmonic injection strategy setting method comprises: Acquire in-vehicle noise data of a vehicle to be processed under a motor noise test condition, and determine a motor electromagnetic order noise curve according to the in-vehicle noise data; Comparing the motor electromagnetic order noise curve with the target order noise curve to determine the problem operating condition; Determining the order of injected harmonic current according to the order of electromagnetic noise of the motor in the problematic working condition; According to the problem working condition, the vehicle to be processed is controlled to travel at a preset starting motor torque and a preset starting motor speed corresponding to the problem working condition, and the current amplitude and phase of the injected harmonics are optimized according to the motor electromagnetic order noise to obtain a target current amplitude and a target current phase corresponding to the preset starting motor torque and the preset starting motor speed; The current amplitude and current phase of the injected harmonics are calibrated according to the motor torque range and motor speed range of the problem working condition, and the harmonic injection strategy is determined according to the calibration results.

2. The vehicle harmonic injection strategy setting method according to claim 1, characterized in that: The step of obtaining the in-vehicle noise data of the vehicle to be processed under the motor noise test condition includes: Control the vehicle to be processed to perform a test under the motor noise test condition to obtain a noise signal, motor torque and speed signal; The vehicle interior noise data is obtained according to the noise signal, the motor torque and the speed signal.

3. The vehicle harmonic injection strategy setting method according to claim 2, characterized in that: The control of the vehicle to be processed to perform a test under the motor noise test condition to obtain a noise signal, a motor torque and a speed signal includes: The vehicle to be processed is controlled to accelerate on the target road surface according to each preset throttle opening, and the vehicle to be processed is controlled to glide on the target road surface according to each preset energy recovery torque, so as to obtain a noise signal, a motor torque and a speed signal.

4. The vehicle harmonic injection strategy setting method according to claim 1, characterized in that: The step of comparing the motor electromagnetic order noise curve with a target order noise curve to determine a problem operating condition includes: Obtain the target order noise curve under ideal conditions; Comparing the target order noise curve with the motor electromagnetic order noise curve to obtain a noise abnormality area; A problematic operating condition is determined according to the abnormal noise area, where the problematic operating condition is a condition in which the electromagnetic order noise value of the motor exceeds the target noise value.

5. The vehicle harmonic injection strategy setting method according to claim 1, characterized in that: The optimizing of the current amplitude and phase of the injected harmonics according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed includes: Determine a preset starting motor torque and a preset starting motor speed according to the problem working condition, perform current phase calibration of the vehicle to be processed for injecting harmonics, and obtain a target current phase corresponding to the lowest motor electromagnetic order noise; The current amplitude of the vehicle to be processed is calibrated according to the target current phase to obtain a target current amplitude at which the electromagnetic order noise of the motor meets the target value.

6. The vehicle harmonic injection strategy setting method according to claim 1, characterized in that: The current amplitude and current phase calibration is performed according to the motor torque range and motor speed range of the problem working condition, including: Keeping the preset starting motor torque unchanged, and adjusting the preset motor speed with a preset step size, calibrating the current amplitude and current phase corresponding to the injected harmonic current order, and obtaining the target current amplitude and target current phase corresponding to the motor speed range of the problem working condition under the preset starting motor torque; The motor torque is adjusted with a preset step size, and the preset motor speed is adjusted with a preset step size. The current amplitude and current phase of the injected harmonic current order are calibrated to obtain the target current amplitude and target current phase corresponding to the motor torque range and the motor speed range corresponding to the problem working condition.

7. A vehicle harmonic injection strategy setting device, characterized in that: The vehicle harmonic injection strategy setting device comprises: A data acquisition module is used to obtain the in-vehicle noise data of the vehicle to be processed under the motor noise test condition, and determine the motor electromagnetic order noise curve according to the in-vehicle noise data; A problem determination module, used for comparing the motor electromagnetic order noise curve with a target order noise curve to determine a problem operating condition; A strategy setting module is used to determine the order of injected harmonic current according to the order of the motor electromagnetic noise of the problem working condition; control the vehicle to be processed to travel at a preset starting motor torque and a preset starting motor speed corresponding to the problem working condition according to the problem working condition, and optimize the current amplitude and phase of the injected harmonics according to the motor electromagnetic order noise to obtain the target current amplitude and target current phase corresponding to the preset starting motor torque and the preset starting motor speed; calibrate the current amplitude and current phase of the injected harmonics according to the motor torque range and motor speed range of the problem working condition, and determine the harmonic injection strategy according to the calibration result.

8. A vehicle harmonic injection strategy setting device, characterized in that: The vehicle harmonic injection strategy setting device includes: a memory, a processor, and a vehicle harmonic injection strategy setting program stored in the memory and running on the processor, and the vehicle harmonic injection strategy setting program is configured to implement the vehicle harmonic injection strategy setting method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a vehicle harmonic injection strategy setting program, and when the vehicle harmonic injection strategy setting program is executed by the processor, the vehicle harmonic injection strategy setting method according to any one of claims 1 to 6 is implemented.

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