Layout method and apparatus for multi-stage gear in new energy vehicle, and device

Abstract

The present application relates to the technical field of new energy vehicles, and discloses a layout method and apparatus for a multi-stage gear in a new energy vehicle, a device, a storage medium, and a product. The method comprises: determining a gear arrangement space of a multi-stage gear of a new energy vehicle; on the basis of the gear arrangement space, determining a plurality of first candidate arrangement angles, the first candidate arrangement angles being candidate angles between gear shafts of the multi-stage gear; for any one of the plurality of first candidate arrangement angles, determining an overall transmission error excitation of the multi-stage gear when arrangement angles of the multi-stage gear are the first candidate arrangement angles, the overall transmission error excitation being used for representing the degree of whine generated by the multi-stage gear; on the basis of the overall transmission error excitation of the multi-stage gear when the arrangement angles of the multi-stage gear are the plurality of first candidate arrangement angles, determining, from among the plurality of first candidate arrangement angles, a first target arrangement angle having the smallest overall transmission error excitation; and on the basis of the first target arrangement angle, determining arrangement information of the multi-stage gear.

Description

Layout methods, devices and equipment for multi-gear systems in new energy vehicles

[0001] This disclosure is based on and claims priority to Chinese Patent Application No. 202411926285.1, filed on December 25, 2024, entitled "Layout Method, Apparatus and Equipment for Multi-Gears in New Energy Vehicles", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of new energy vehicle technology, and in particular to a method, device and equipment for arranging multi-gear in a new energy vehicle. Background Technology

[0003] With the continuous development of new energy vehicle technology, new energy vehicles are becoming more and more popular and competition is becoming more and more intense. Consumers have higher and higher requirements for the NVH (Noise, Vibration, Harshness) performance of new energy vehicles. Therefore, reducing vibration and noise is urgent. Gear noise generated by multi-gear is one of the most important noise sources in new energy vehicles. Moreover, since new energy vehicles do not have the masking effect of traditional engine noise, this poses a greater challenge to the gear layout. Summary of the Invention

[0004] This application provides a method, apparatus, and device for arranging multi-gear systems in new energy vehicles. The technical solution is as follows:

[0005] On the one hand, a method for arranging multi-gear systems in a new energy vehicle is provided, the method comprising:

[0006] Determine the gear arrangement space of the multi-gear system in a new energy vehicle, wherein the gear arrangement space is the space in which the multi-gear system is allowed to be arranged.

[0007] Based on the gear arrangement space, a plurality of first candidate arrangement angles are determined, wherein the first candidate arrangement angles are candidate angles between the gear shafts of the multi-gear;

[0008] For any one of the plurality of first candidate arrangement angles, when the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the overall transmission error excitation of the multi-gear is used to represent the degree to which the multi-gear produces a whistling sound.

[0009] Based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is one of the multiple first candidate arrangement angles, the first target arrangement angle with the smallest overall transmission error excitation is determined from the multiple first candidate arrangement angles.

[0010] Based on the first target arrangement angle, the arrangement information of the multi-gear is determined.

[0011] In one possible implementation, the step of determining the overall transmission error excitation of the multi-gear system when the arrangement angle of the multi-gear system is the first candidate arrangement angle includes:

[0012] When the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the phase of the transmission error excitation of multiple meshing points of the multi-gear is determined. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of howling generated by the meshing point.

[0013] The overall transmission error excitation of the multi-stage gear is determined based on the phase of the transmission error excitation at the multiple meshing points.

[0014] In another possible implementation, determining the phase of the transmission error excitation at multiple meshing points of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle includes:

[0015] When the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the transmission error of the multiple meshing points is determined. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position of the multi-gear when it meshes through the meshing point.

[0016] For any one of the plurality of meshing points, Fourier decomposition is performed on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

[0017] In another possible implementation, determining a plurality of first candidate arrangement angles based on the gear arrangement space includes:

[0018] Based on the gear arrangement space, a first arrangement angle range of the multi-gear is determined, and the first arrangement angle range is used to constrain the angle between the gear shafts of the multi-gear.

[0019] Based on the first adjustment granularity, a plurality of first candidate arrangement angles are determined from the first arrangement angle range.

[0020] In another possible implementation, determining a plurality of first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity includes:

[0021] Determine the shaft where the multi-gear is located to obtain multiple gear shafts, and determine the first gear shaft from the multiple gear shafts;

[0022] The first gear shaft is fixed, and other gear shafts among the plurality of gear shafts are rotated within the first arrangement angle range by adjusting the first granularity to obtain the plurality of first candidate arrangement angles; or, other gear shafts among the plurality of gear shafts are fixed, and the first gear shaft is rotated within the first arrangement angle range by adjusting the first granularity to obtain the plurality of first candidate arrangement angles.

[0023] In another possible implementation, determining the first arrangement angle range of the multi-gear based on the gear arrangement space includes:

[0024] Based on the second adjustment granularity, a plurality of second candidate arrangement angles are determined from the gear arrangement space, wherein the second adjustment granularity is greater than the first adjustment granularity;

[0025] For any one of the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle;

[0026] Based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of second candidate arrangement angles, a plurality of second target arrangement angles with an overall transmission error excitation less than a preset error excitation are determined from the plurality of second candidate arrangement angles.

[0027] The arrangement angles of the plurality of second targets are combined to form the first arrangement angle range of the multi-gear.

[0028] On the other hand, a multi-gear layout device for a new energy vehicle is provided, the device comprising:

[0029] The first determining module is used to determine the gear arrangement space of the multi-gear of the new energy vehicle, wherein the gear arrangement space is the space in which the multi-gear is allowed to be arranged;

[0030] The second determining module is used to determine a plurality of first candidate arrangement angles based on the gear arrangement space, wherein the first candidate arrangement angles are candidate angles between the gear shafts of the multi-gear;

[0031] The third determining module is used to determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle for any of the plurality of first candidate arrangement angles. The overall transmission error excitation is used to represent the degree to which the multi-gear produces a whistling sound.

[0032] The fourth determining module is used to determine the first target arrangement angle with the smallest overall transmission error excitation from the multiple first candidate arrangement angles, based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is one of the multiple first candidate arrangement angles.

[0033] The fifth determining module is used to determine the arrangement information of the multi-gear based on the first target arrangement angle.

[0034] In one possible implementation, the third determining module is used to determine the phase of the transmission error excitation of multiple meshing points of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of squealing generated by the meshing point. Based on the phases of the transmission error excitation of the multiple meshing points, the overall transmission error excitation of the multi-gear is determined.

[0035] In another possible implementation, the third determining module is used to determine the transmission error of the plurality of meshing points when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position of the multi-gear when it meshes through the meshing point. For any meshing point among the plurality of meshing points, Fourier decomposition is performed on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

[0036] In another possible implementation, the second determining module is used to determine a first arrangement angle range of the multi-gear based on the gear arrangement space, the first arrangement angle range being used to constrain the angle between the gear shafts of the multi-gear; and to determine a plurality of first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity.

[0037] In another possible implementation, the second determining module is used to determine the shaft where the multi-gear is located, obtain multiple gear shafts, determine a first gear shaft from the multiple gear shafts; fix the first gear shaft, and rotate other gear shafts among the multiple gear shafts within the first arrangement angle range using the first adjustment granularity to obtain the multiple first candidate arrangement angles; or, fix other gear shafts among the multiple gear shafts, and rotate the first gear shaft within the first arrangement angle range using the first adjustment granularity to obtain the multiple first candidate arrangement angles.

[0038] In another possible implementation, the second determining module is configured to determine a plurality of second candidate arrangement angles from the gear arrangement space based on a second adjustment granularity, wherein the second adjustment granularity is greater than the first adjustment granularity; for any one of the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle; based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of second candidate arrangement angles, determine a plurality of second target arrangement angles from the plurality of second candidate arrangement angles where the overall transmission error excitation is less than a preset error excitation; and form a first arrangement angle range for the multi-gear by combining the plurality of second target arrangement angles.

[0039] On the other hand, a computer device is provided, the computer device including a processor and a memory, the memory storing at least one piece of program code, the at least one piece of program code being loaded and executed by the processor to implement the above-mentioned multi-gear layout method in new energy vehicles.

[0040] On the other hand, a computer-readable storage medium is provided, wherein at least one piece of program code is stored in the storage medium, the at least one piece of program code being loaded and executed by a processor to implement the above-mentioned multi-gear layout method in new energy vehicles.

[0041] On the other hand, a computer program product is provided, the product storing at least one piece of program code, the at least one piece of program code being executed by a processor to implement the above-mentioned multi-gear layout method in new energy vehicles.

[0042] In this embodiment, when arranging multi-gear, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear. Therefore, selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles can reduce the noise of the multi-gear. Thus, this embodiment not only enables the arrangement of multi-gear to meet the requirements of the overall layout space and size of the entire gearbox, i.e., to achieve lightweighting, but also reduces the noise of the multi-gear, i.e., to ensure the NVH performance of the gear.

[0043] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description

[0044] Figure 1 is a schematic diagram illustrating the implementation environment of a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application;

[0045] Figure 2 is a flowchart illustrating a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application;

[0046] Figure 3 is a schematic diagram of a multi-gear assembly shown in an exemplary embodiment of this application;

[0047] Figure 4 is a schematic diagram illustrating the arrangement angle of a multi-gear assembly in an exemplary embodiment of this application;

[0048] Figure 5 is a schematic diagram of the meshing point of a multi-gear assembly, illustrating an exemplary embodiment of this application;

[0049] Figure 6 is a schematic diagram of the phase of the overall transmission error excitation of a plurality of first candidate arrangement angles, as illustrated in an exemplary embodiment of this application;

[0050] Figure 7 is a flowchart illustrating a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application;

[0051] Figure 8 is a block diagram illustrating a multi-gear layout device in a new energy vehicle according to an exemplary embodiment of this application;

[0052] Figure 9 is a block diagram of a computer device illustrated in an exemplary embodiment of this application. Detailed Implementation

[0053] To make the technical solution and advantages of this application clearer, the embodiments of this application will be described in further detail below.

[0054] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0055] It should be noted that all information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in this application have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the gear arrangement space involved in this application was obtained with full authorization.

[0056] Please refer to Figure 1, which shows a schematic diagram of the implementation environment of a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application. This implementation environment includes a computer device 101 and a new energy vehicle 102. The new energy vehicle 102 is equipped with a multi-gear system, which includes multiple gears meshing sequentially. The number of gears in the multi-gear system can be set and changed according to the needs of the new energy vehicle 102. In this embodiment, the number of gears in the multi-gear system is not specifically limited; for example, the multi-gear system may include 3 gears or 4 gears. In this embodiment, the computer device 101 is used to determine the layout of the multi-gear system in the new energy vehicle 102; and the computer device 101 uses CAE (Computer Aided Engineering) research and analysis methods to determine the layout of the multi-gear system.

[0057] In one possible implementation, the development trend of the transmission for new energy vehicles 102 is to achieve strong power, good economy, compact structure, and lightweight design. To meet the requirements of power and economy, new energy vehicles 102 often need to be matched with motors with relatively large outer diameters. If the new energy vehicle 102 is a multi-gear, multi-mode vehicle, multiple clutches with large outer diameters need to be arranged on the input shaft of the engine. To avoid interference between the clutches and the motor, there must be a large center distance between the drive shaft of the motor and the input shaft of the engine. With such a large center distance, it is difficult to transmit the power of the motor from the drive shaft of the motor to the input shaft of the engine using only one pair of gears (2 gears). Therefore, to match such a large center distance, an idler gear needs to be added between these two gears, thus forming a structure in which three or more gears mesh simultaneously, i.e., a multi-gear system.

[0058] In another possible implementation, in a common multi-power coupling form, the power of the motor and the engine are ultimately transmitted to the output shaft and coupled on the output shaft. In order to reduce intermediate shafts and transmission gear pairs, a situation where multiple power sources share gear pairs is adopted, that is, the gears shared by the motor and the engine are multi-gear.

[0059] Computer device 101 can be a tablet computer, laptop computer, desktop computer, or smartphone, but is not limited to these. For example, computer device 101 is a laptop computer used by developers of new energy vehicle 102. Developers use computer device 101 to configure the layout of the multi-gear system in new energy vehicle 102.

[0060] In related technologies, when arranging multi-gear sets, the arrangement is often only roughly based on the gear arrangement space, ensuring that the multi-gear sets can be placed within the space, without considering NVH design issues. This often leads to the phase superposition of the transmission error excitation of the multi-gear sets. The transmission error excitation of the multi-gear sets is used to represent the degree of howling generated by the multi-gear sets. The phase superposition of the transmission error excitation of the multi-gear sets results in a greater degree of howling generated by the multi-gear sets, thus generating more noise and leading to more serious NVH problems.

[0061] In this embodiment, when arranging multi-gear, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear. Therefore, selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles can reduce the noise of the multi-gear. Thus, this embodiment not only enables the arrangement of multi-gear to meet the requirements of the overall layout space and size of the entire gearbox, i.e., to achieve lightweighting, but also reduces the noise of the multi-gear, i.e., to ensure the NVH performance of the gear.

[0062] Please refer to Figure 2, which shows a flowchart of a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application. Referring to Figure 2, the method includes:

[0063] Step 201: The computer equipment determines the gear arrangement space of the multi-gear of the new energy vehicle. The gear arrangement space is the space in which the multi-gear is allowed to be arranged.

[0064] Developers will pre-set the design drawings of the new energy vehicle, which indicate the gear layout space of the multi-gear system; in this step, the computer equipment determines the gear arrangement space of the multi-gear system from the design drawings of the new energy vehicle.

[0065] Multi-gear systems can be used in new energy vehicles for connecting the motor and engine, or in multi-power coupling configurations. Therefore, the solutions provided in this application are applicable to the design of gear and shaft systems with multi-gear or coaxial coupling structures in new energy transmissions. The NVH design method for multi-gear or coaxial shaft arrangements provided in this application can be used in the gear and shaft design of any transmission or mechanical system with high NVH performance requirements. The specific design can be optimized based on the actual structural form and analysis results.

[0066] Step 202: The computer device determines multiple first candidate arrangement angles based on the gear arrangement space. The first candidate arrangement angles are the candidate angles between the gear shafts of the multi-gear.

[0067] A multi-gear system comprises multiple gears that mesh sequentially. For example, referring to Figure 3, a multi-gear system includes gears 1, 2, and 3 that mesh sequentially. Figure 3 shows the gear shafts where gear 1, gear 2, and gear 3 are located. The first candidate arrangement angle can be the angle between the lines connecting the center points of two adjacent gears in the meshing system. For example, referring to Figure 4, gears 1 and 2 mesh, and gears 2 and 3 mesh. The center points of gear 1 and 2 form a first boundary line, and the center points of gear 2 and 3 form a second boundary line. The first and second boundary lines constitute the first candidate arrangement angle.

[0068] Step 203: For any one of the multiple first candidate arrangement angles, the computer device determines the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear.

[0069] The overall transmission error excitation is positively correlated with the degree of squealing produced by the multi-gear system. That is, the greater the overall transmission error excitation, the greater the squealing and noise produced by the multi-gear system; while the smaller the overall transmission error excitation, the less squealing and noise produced by the multi-gear system.

[0070] In one possible implementation, this step can be achieved through the following steps (1) and (2), including:

[0071] (1) When the computer equipment determines the arrangement angle of the multi-gear as the first candidate arrangement angle, the phase of the transmission error excitation of multiple meshing points of the multi-gear is determined. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of howling generated by the meshing point.

[0072] The phase of the transmission error excitation is used to indicate the direction of the transmission error excitation. When the phases of the transmission error excitations at multiple meshing points are exactly opposite, the transmission error excitations at multiple meshing points can cancel each other out, thereby reducing the whistling generated by multi-gear sets and thus reducing noise. Here, the meshing point refers to the position where two gears mesh; for example, please refer to Figure 5, where the meshing points of gear 1 and gear 2, as well as gear 2 and gear 3, are marked.

[0073] In one possible implementation, this step can be achieved through the following steps (1-1) to (1-2):

[0074] (1-1) When the computer equipment determines the arrangement angle of the multi-gear as the first candidate arrangement angle, the transmission error of multiple meshing points is different. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position when the multi-gear meshes through the meshing point.

[0075] For any meshing point, the computer device determines the actual position and the theoretical position of the meshing point, and obtains the transmission error of the meshing point by determining the deviation between the actual position and the theoretical position; since there are multiple meshing points, the computer device can determine the transmission error of multiple meshing points.

[0076] (1-2) For any one of the multiple meshing points, the computer device performs Fourier decomposition on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

[0077] The phase of the transmission error excitation at the meshing point can be the phase of the fundamental frequency of the transmission error at the meshing point or the phase of a harmonic of the transmission error. Furthermore, the computer equipment can perform Fourier decomposition on the transmission error at the meshing point to obtain the amplitude of the transmission error excitation at the meshing point, which can be either the amplitude of the fundamental frequency of the transmission error at the meshing point or the amplitude of a harmonic of the transmission error.

[0078] (2) The computer equipment determines the overall transmission error excitation of the multi-gear based on the phase of the transmission error excitation of multiple meshing points.

[0079] The computer equipment superimposes the phases of the transmission error excitations from multiple meshing points to obtain the overall transmission error excitation of the multi-gear system. For example, if multiple meshing points include meshing point 1 and meshing point 2, and the phases of the transmission error excitations from meshing point 1 and meshing point 2 are +30° and -30° respectively, then the computer equipment superimposes the phases of the transmission error excitations from multiple meshing points. The resulting overall transmission error excitation of the multi-gear system is 0, meaning the transmission error excitations from multiple meshing points cancel each other out, thereby reducing the overall transmission error excitation of the multi-gear system.

[0080] In one possible implementation, the computer device can also determine the overall transmission error excitation of the multi-gear by combining the amplitude of the transmission error excitation; correspondingly, this step can be: the computer device determines the overall transmission error excitation of the multi-gear based on the phase and amplitude of the transmission error excitation at multiple meshing points.

[0081] The step of determining the overall transmission error excitation of a multi-gear system based on the phase and amplitude of the transmission error excitation at multiple meshing points using computer equipment can be as follows: The computer equipment superimposes the phase and amplitude of the transmission error excitation at multiple meshing points to obtain the overall transmission error excitation of the multi-gear system. For example, if the multiple meshing points include meshing point 1 and meshing point 2, and the phases of the transmission error excitation at meshing point 1 and meshing point 2 are +30° and -30° respectively, and the amplitudes of the transmission error excitation at meshing point 1 and meshing point 2 are both 10°, then the transmission error excitations at multiple meshing points are completely delivered, thereby reducing the overall transmission error excitation of the multi-gear system.

[0082] Step 204: The computer equipment determines the first target arrangement angle with the smallest overall transmission error excitation from the multiple first candidate arrangement angles when the arrangement angle of the multi-gear is based on the overall transmission error excitation of the multi-gear.

[0083] The overall transmission error excitation is used to represent the degree of squealing produced by multi-gear; therefore, the computer device can reduce the noise of multi-gear by selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles.

[0084] In one possible implementation, when the overall transmission error excitation includes phase and amplitude, the computer device determines the first target arrangement angle with the smallest phase from the multiple first candidate arrangement angles based on the phase of the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is multiple first candidate arrangement angles; when there are multiple overall transmission error excitations with the same and smallest phases, the computer device determines the overall transmission error excitation with the smallest amplitude from the multiple overall transmission error excitations, and determines the first candidate arrangement angle corresponding to the overall transmission error excitation as the first target arrangement angle.

[0085] For example, referring to Figure 6, the multiple first candidate arrangement angles are angle 1, angle 2, angle 3, angle 4 and angle 5. The phase of the overall transmission error excitation of angle 1, angle 2, angle 3, angle 4 and angle 5 is marked in Figure 6. Based on Figure 6, it can be seen that the phase of the overall transmission error excitation corresponding to angle 3 is the smallest. Therefore, the first target arrangement angle is determined to be angle 3.

[0086] In this embodiment, since the gear arrangement space dimension is taken into account when determining multiple first candidate arrangement angles, this embodiment can combine dimensions such as overall box size and lightweighting to determine the layout of multi-gear.

[0087] Step 205: The computer equipment determines the arrangement information of the multi-gear based on the first target arrangement angle.

[0088] The arrangement information of the multi-gear system is used to indicate the arrangement angle between the gear shafts of the multi-gear system. After the computer device determines the arrangement information of the multi-gear system, it can arrange the multi-gear system based on the arrangement information; for example, the computer device sets the arrangement angle between the gear shafts of the multi-gear system as a first target arrangement angle.

[0089] In this embodiment, when arranging multi-gear, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear. Therefore, selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles can reduce the noise of the multi-gear. Thus, this embodiment not only enables the arrangement of multi-gear to meet the requirements of the overall layout space and size of the entire gearbox, i.e., to achieve lightweighting, but also reduces the noise of the multi-gear, i.e., to ensure the NVH performance of the gear.

[0090] Please refer to Figure 7, which shows a flowchart of a multi-gear layout method in a new energy vehicle according to an exemplary embodiment of this application. Referring to Figure 7, the method includes:

[0091] Step 701: The computer equipment determines the gear arrangement space of the multi-gear of the new energy vehicle. The gear arrangement space is the space in which the multi-gear is allowed to be arranged.

[0092] In some embodiments, this step is the same as step 201, and will not be described again here.

[0093] Step 702: The computer device determines a first arrangement angle range for the multi-gear based on the gear arrangement space. The first arrangement angle range is used to constrain the angle between the gear shafts of the multi-gear.

[0094] In this embodiment, the computer device uses CAE research and analysis methods. First, feasible candidate arrangement angles are selected, and the inter-axis angle is used as the design variable for angle optimization according to a certain shaft rotation method. Based on the gear arrangement space, the first round of optimization can use a slightly larger angle interval for rough optimization. Based on the comparison results, the optimal arrangement angle range is initially determined, and then the second round of optimization is performed to further narrow the angle range and complete the precise optimization. Accordingly, this step can be achieved through the following steps (1) to (4), including:

[0095] (1) The computer device determines multiple second candidate arrangement angles from the gear arrangement space based on the second adjustment granularity.

[0096] This design method first considers the available space for optimizing the shaft system layout based on the overall box boundary. Depending on the feasible space range, one shaft is fixed while the other shafts rotate, or one shaft rotates while the other shafts are fixed. The shaft system is rotated in a clockwise or counterclockwise direction, and each shaft is in a different relative position, which changes the included angle between the shafts. At the same time, the gear meshing position changes accordingly. Finally, the gear meshing is adjusted by adjusting the included angle between the shafts.

[0097] In one possible implementation, multiple second candidate arrangement angles are determined by fixing one axis and rotating the other axes. Accordingly, this step can be: a computer device determines the axis where the multi-gear is located, obtaining multiple gear axes; a second gear axis is determined from these multiple gear axes; the first gear axis is fixed, and other gear axes among the multiple gear axes are rotated in the gear arrangement space using a second adjustment granularity to obtain multiple second candidate arrangement angles. When selecting other gear axes among the multiple gear axes in the gear arrangement space, rotation can be clockwise or counterclockwise.

[0098] Since there are multiple gear shafts, the computer device can fix one gear shaft at a time and determine multiple second candidate arrangement angles by rotating the other shafts. For example, if there are three gear shafts, namely gear shaft 1, gear shaft 2, and gear shaft 3, the computer device can fix gear shaft 1 and rotate gear shaft 2 and gear shaft 3 to obtain multiple second candidate arrangement angles 1; then fix gear shaft 2 and rotate gear shaft 1 and gear shaft 3 to obtain multiple second candidate arrangement angles 2; then fix gear shaft 3 and rotate gear shaft 1 and gear shaft 2 to obtain multiple second candidate arrangement angles 3. The multiple second candidate arrangement angles 1, 2, and 3 are the finally determined multiple second candidate arrangement angles.

[0099] In another possible implementation, multiple second candidate arrangement angles are determined by rotating one axis while fixing the others. Accordingly, this step can be: a computer device determines the axis where the multi-gear is located, obtaining multiple gear axes; a second gear axis is determined from these multiple gear axes; the other gear axes are fixed, and the second gear axis is rotated within the gear layout space using a second adjustment granularity to obtain multiple second candidate arrangement angles. When rotating the second gear axis within the gear layout space, it can be rotated clockwise or counterclockwise.

[0100] (2) For any of the multiple second candidate arrangement angles, the computer device determines the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle.

[0101] The process by which the computer equipment determines the arrangement angle of the multi-gear as the second candidate arrangement angle is similar to the process by which the computer equipment determines the arrangement angle of the multi-gear as the first candidate arrangement angle, and will not be described in detail here.

[0102] (3) When the arrangement angle of the multi-gear is a number of second candidate arrangement angles, the overall transmission error excitation of the multi-gear is determined from the number of second candidate arrangement angles. The number of second target arrangement angles with an overall transmission error excitation less than the preset error excitation is determined.

[0103] (4) The computer equipment arranges multiple second target angles to form the first arrangement angle range of the multi-gear.

[0104] In one possible implementation, when the multiple second target arrangement angles are consecutive, the computer device directly forms a first arrangement angle range of the multiple second target arrangement angles into a multi-gear configuration; when the multiple second target arrangement angles are not consecutive, the computer device determines a series of consecutive angles from the multiple second target arrangement angles and forms a first arrangement angle range into a first arrangement angle range; or, when the multiple second target arrangement angles are not consecutive, the computer device determines the maximum arrangement angle range formed by the multiple second target arrangement angles as the first arrangement angle range; or, when the multiple second target arrangement angles are not consecutive, the computer device determines the minimum arrangement angle range formed by the multiple second target arrangement angles as the first arrangement angle range.

[0105] Step 703: The computer device determines a plurality of first candidate arrangement angles from the first arrangement angle range based on the first adjustment granularity.

[0106] The second adjustment granularity is greater than the first adjustment granularity; in one possible implementation, the computer device determines multiple first candidate arrangement angles by fixing one axis and rotating the other axes; correspondingly, this step can be: the computer device determines the axis where the multi-gear is located, obtains multiple gear shafts, and determines the first gear shaft from the multiple gear shafts; fixes the first gear shaft, and rotates the other gear shafts among the multiple gear shafts within the first arrangement angle range through the first adjustment granularity to obtain multiple first candidate arrangement angles.

[0107] In another possible implementation, the computer device determines multiple second candidate arrangement angles by rotating one of the axes and fixing the other axes; correspondingly, this step can be: the computer device determines the axis where the multi-gear is located, obtaining multiple gear shafts, and determines a first gear shaft from the multiple gear shafts; fixing the other gear shafts among the multiple gear shafts, and rotating the first gear shaft within the first arrangement angle range by a first adjustment granularity to obtain multiple first candidate arrangement angles.

[0108] Step 704: For any one of the multiple first candidate arrangement angles, the computer device determines the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear.

[0109] In some embodiments, this step is the same as step 203, and will not be described again here.

[0110] Step 705: The computer device determines the first target arrangement angle with the smallest overall transmission error excitation from the multiple first candidate arrangement angles when the arrangement angle of the multi-gear is based on the overall transmission error excitation of the multi-gear.

[0111] In some embodiments, this step is the same as step 204, and will not be described again here.

[0112] Step 706: The computer equipment determines the arrangement information of the multi-gear based on the first target arrangement angle.

[0113] In some embodiments, this step is the same as step 205, and will not be described again here.

[0114] In this embodiment of the application, when determining multiple first candidate arrangement angles, a two-round optimization method is used to determine them. In the first round of optimization, a slightly larger angle interval is used for coarse optimization. Based on the comparison results, a preliminary range of better arrangement angles is determined. Then, a second round of optimization is performed to further narrow down the angle range and complete the precise optimization, thereby improving the efficiency of determining multiple first candidate arrangement angles.

[0115] In this embodiment, when arranging multi-gear, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear. Therefore, selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles can reduce the noise of the multi-gear. Thus, this embodiment not only enables the arrangement of multi-gear to meet the requirements of the overall layout space and size of the entire gearbox, i.e., to achieve lightweighting, but also reduces the noise of the multi-gear, i.e., to ensure the NVH performance of the gear.

[0116] Please refer to Figure 8, which shows a block diagram of a multi-gear layout device in a new energy vehicle according to an exemplary embodiment of this application. The device includes:

[0117] The first determining module 801 is used to determine the gear arrangement space of the multi-gear of the new energy vehicle, wherein the gear arrangement space is the space in which the multi-gear is allowed to be arranged.

[0118] The second determining module 802 is used to determine a plurality of first candidate arrangement angles based on the gear arrangement space, wherein the first candidate arrangement angles are candidate angles between the gear shafts of the multi-gear;

[0119] The third determining module 803 is used to determine, for any one of the plurality of first candidate arrangement angles, the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle, wherein the overall transmission error excitation is used to represent the degree to which the multi-gear produces a whistling sound.

[0120] The fourth determining module 804 is used to determine the first target arrangement angle with the smallest overall transmission error excitation from the multiple first candidate arrangement angles, based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is one of the multiple first candidate arrangement angles.

[0121] The fifth determining module 805 is used to determine the arrangement information of the multi-gear based on the first target arrangement angle.

[0122] In one possible implementation, the third determining module 803 is used to determine the phase of the transmission error excitation of multiple meshing points of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of squealing generated by the meshing point. Based on the phases of the transmission error excitation of the multiple meshing points, the overall transmission error excitation of the multi-gear is determined.

[0123] In another possible implementation, the third determining module 803 is used to determine the transmission error of the plurality of meshing points when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position of the multi-gear when it meshes through the meshing point. For any meshing point among the plurality of meshing points, Fourier decomposition is performed on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

[0124] In another possible implementation, the second determining module 802 is used to determine a first arrangement angle range of the multi-gear based on the gear arrangement space, the first arrangement angle range being used to constrain the angle between the gear shafts of the multi-gear; and to determine a plurality of first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity.

[0125] In another possible implementation, the second determining module 802 is used to determine the shaft where the multi-gear is located, obtain multiple gear shafts, determine a first gear shaft from the multiple gear shafts; fix the first gear shaft, and rotate other gear shafts among the multiple gear shafts within the first arrangement angle range using the first adjustment granularity to obtain the multiple first candidate arrangement angles; or, fix other gear shafts among the multiple gear shafts, and rotate the first gear shaft within the first arrangement angle range using the first adjustment granularity to obtain the multiple first candidate arrangement angles.

[0126] In another possible implementation, the second determining module 802 is configured to determine a plurality of second candidate arrangement angles from the gear arrangement space based on a second adjustment granularity, wherein the second adjustment granularity is greater than the first adjustment granularity; for any one of the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle; based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of second candidate arrangement angles, determine a plurality of second target arrangement angles from the plurality of second candidate arrangement angles where the overall transmission error excitation is less than a preset error excitation; and form a first arrangement angle range for the multi-gear by combining the plurality of second target arrangement angles.

[0127] In this embodiment, when arranging multi-gear, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear. The overall transmission error excitation is used to represent the degree of squealing generated by the multi-gear. Therefore, selecting the first target arrangement angle with the smallest overall transmission error excitation from multiple first candidate arrangement angles can reduce the noise of the multi-gear. Thus, this embodiment not only enables the arrangement of multi-gear to meet the requirements of the overall layout space and size of the entire gearbox, i.e., to achieve lightweighting, but also reduces the noise of the multi-gear, i.e., to ensure the NVH performance of the gear.

[0128] It should be noted that the multi-gear layout device for new energy vehicles provided in the above embodiments is only an example of the division of the above functional modules when arranging multi-gears in new energy vehicles. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above. In addition, the multi-gear layout device for new energy vehicles and the multi-gear layout method embodiment provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0129] Figure 9 is a structural block diagram of a computer device 900 provided in an embodiment of this application. The computer device 900 can be a portable mobile terminal, such as a smartphone, tablet computer, MP3 player (Moving Picture Experts Group Audio Layer III), MP4 player (Moving Picture Experts Group Audio Layer IV), laptop computer, or desktop computer. The computer device 900 may also be referred to as user equipment, portable terminal, laptop terminal, desktop terminal, or other names.

[0130] Typically, computer device 900 includes a processor 901 and a memory 902.

[0131] Processor 901 may include one or more processing cores, such as a quad-core processor, an octa-core processor, etc. Processor 901 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 901 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 901 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the screen. In some embodiments, processor 901 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0132] The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 902 is used to store at least one program code, which is executed by the processor 901 to implement the multi-gear layout method in a new energy vehicle provided in the method embodiments of this application.

[0133] In some embodiments, the computer device 900 may optionally include a peripheral device interface 903 and at least one peripheral device. The processor 901, memory 902, and peripheral device interface 903 can be connected via a bus or signal line. Each peripheral device can be connected to the peripheral device interface 903 via a bus, signal line, or circuit board. Specifically, the peripheral device includes at least one of the following: a radio frequency circuit 904, a display screen 905, a camera assembly 906, an audio circuit 907, and a power supply 908.

[0134] Peripheral device interface 903 can be used to connect at least one I / O (Input / Output) related peripheral device to processor 901 and memory 902. In some embodiments, processor 901, memory 902 and peripheral device interface 903 are integrated on the same chip or circuit board; in some other embodiments, any one or two of processor 901, memory 902 and peripheral device interface 903 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0135] The radio frequency (RF) circuit 904 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 904 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 904 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 904 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 904 can communicate with other terminals through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 904 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0136] Display screen 905 is used to display a UI (User Interface). This UI may include graphics, text, icons, videos, and any combination thereof. When display screen 905 is a touch display screen, it also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to processor 901 for processing. In this case, display screen 905 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there may be one display screen 905, disposed on the front panel of computer device 900; in other embodiments, there may be at least two display screens 905, disposed on different surfaces of computer device 900 or in a folded design; in other embodiments, display screen 905 may be a flexible display screen, disposed on a curved or folded surface of computer device 900. Furthermore, display screen 905 may be configured as a non-rectangular irregular shape, i.e., a non-rectangular screen. Display screen 905 may be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0137] The camera assembly 906 is used to acquire images or videos. Optionally, the camera assembly 906 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is located on the front panel of the terminal, and the rear-facing camera is located on the back of the terminal. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, a wide-angle camera, and a telephoto camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, panoramic shooting by fusion of the main camera and the wide-angle camera, VR (Virtual Reality) shooting, or other fusion shooting functions. In some embodiments, the camera assembly 906 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm-light flash and a cool-light flash, which can be used for light compensation at different color temperatures.

[0138] The audio circuit 907 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to the processor 901 for processing, or input to the radio frequency circuit 904 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each located in a different part of the computer device 900. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from the processor 901 or the radio frequency circuit 904 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, the audio circuit 907 may also include a headphone jack.

[0139] Power supply 908 is used to supply power to the various components in computer device 900. Power supply 908 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 908 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired line, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0140] In some embodiments, the computer device 900 further includes one or more sensors 909. The one or more sensors 909 include, but are not limited to, an accelerometer 910, a gyroscope 911, a pressure sensor 912, an optical sensor 913, and a proximity sensor 914.

[0141] Accelerometer 910 can detect the magnitude of acceleration along the three coordinate axes of a coordinate system established by computer device 900. For example, accelerometer 910 can be used to detect the components of gravitational acceleration along the three coordinate axes. Processor 901 can control display screen 905 to display the user interface in either a landscape or portrait view based on the gravitational acceleration signal acquired by accelerometer 910. Accelerometer 910 can also be used for games or for acquiring user motion data.

[0142] The gyroscope sensor 911 can detect the orientation and rotation angle of the computer device 900. The gyroscope sensor 911, in conjunction with the accelerometer sensor 910, can collect 3D motion data from the user on the computer device 900. Based on the data collected by the gyroscope sensor 911, the processor 901 can perform the following functions: motion sensing (e.g., changing the UI based on the user's tilt), image stabilization during shooting, game control, and inertial navigation.

[0143] The pressure sensor 912 can be disposed on the side bezel of the computer device 900 and / or on the lower layer of the display screen 905. When the pressure sensor 912 is disposed on the side bezel of the computer device 900, it can detect the user's grip signal on the computer device 900, and the processor 901 can perform left / right hand recognition or quick operation based on the grip signal collected by the pressure sensor 912. When the pressure sensor 912 is disposed on the lower layer of the display screen 905, the processor 901 can control the operable controls on the UI interface based on the user's pressure operation on the display screen 905. The operable controls include at least one of button controls, scroll bar controls, icon controls, and menu controls.

[0144] An optical sensor 913 is used to collect ambient light intensity. In one embodiment, the processor 901 can control the display brightness of the display screen 905 based on the ambient light intensity collected by the optical sensor 913. Specifically, when the ambient light intensity is high, the display brightness of the display screen 905 is increased; when the ambient light intensity is low, the display brightness of the display screen 905 is decreased. In another embodiment, the processor 901 can also dynamically adjust the shooting parameters of the camera assembly 906 based on the ambient light intensity collected by the optical sensor 913.

[0145] A proximity sensor 914, also known as a distance sensor, is typically located on the front panel of a computer device 900. The proximity sensor 914 is used to detect the distance between the user and the front of the computer device 900. In one embodiment, when the proximity sensor 914 detects that the distance between the user and the front of the computer device 900 is gradually decreasing, the processor 901 controls the display screen 905 to switch from a screen-on state to a screen-off state; when the proximity sensor 914 detects that the distance between the user and the front of the computer device 900 is gradually increasing, the processor 901 controls the display screen 905 to switch from a screen-off state to a screen-on state.

[0146] Those skilled in the art will understand that the structure shown in FIG9 does not constitute a limitation on the computer device 900, and may include more or fewer components than shown, or combine certain components, or employ different component arrangements.

[0147] This application also provides a computer-readable storage medium storing at least one line of program code, which is loaded and executed by a processor to implement the multi-gear layout method in a new energy vehicle as described in any of the above implementations. Optionally, the storage medium may be a non-transitory computer-readable storage medium, such as ROM (Read-Only Memory), RAM (Random Access Memory), CD-ROM (Compact Disc Read-Only Memory), magnetic tape, floppy disk, and optical data storage devices.

[0148] This application also provides a computer program product that stores at least one piece of program code, which is loaded and executed by a processor to implement the multi-gear layout method in new energy vehicles shown in the above embodiments.

[0149] In some embodiments, the computer program product involved in the present application can be deployed and executed on a computer device, or on multiple computer devices located in one location, or on multiple computer devices distributed in multiple locations and interconnected through a communication network. Multiple computer devices distributed in multiple locations and interconnected through a communication network can form a blockchain system.

[0150] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0151] The above description is only for the purpose of enabling those skilled in the art to understand the technical solution of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for arranging multi-gear systems in a new energy vehicle, wherein, The method includes: Determine the gear arrangement space of the multi-gear system in a new energy vehicle, wherein the gear arrangement space is the space in which the multi-gear system is allowed to be arranged. Based on the gear arrangement space, a plurality of first candidate arrangement angles are determined, wherein the first candidate arrangement angles are candidate angles between the gear shafts of the multi-gear; For any one of the plurality of first candidate arrangement angles, when the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the overall transmission error excitation of the multi-gear is used to represent the degree to which the multi-gear produces a whistling sound. Based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is one of the multiple first candidate arrangement angles, the first target arrangement angle with the smallest overall transmission error excitation is determined from the multiple first candidate arrangement angles. Based on the first target arrangement angle, the arrangement information of the multi-gear is determined.

2. The method according to claim 1, wherein, The step of determining the overall transmission error excitation of the multi-gear system when the arrangement angle of the multi-gear system is the first candidate arrangement angle includes: When the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the phase of the transmission error excitation of multiple meshing points of the multi-gear is determined. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of howling generated by the meshing point. The overall transmission error excitation of the multi-stage gear is determined based on the phase of the transmission error excitation at the multiple meshing points.

3. The method according to claim 2, wherein, The step of determining the phase of the transmission error excitation at multiple meshing points of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle includes: When the arrangement angle of the multi-gear is determined to be the first candidate arrangement angle, the transmission error of the multiple meshing points is determined. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position of the multi-gear when it meshes through the meshing point. For any one of the plurality of meshing points, Fourier decomposition is performed on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

4. The method according to any one of claims 1-3, wherein, The determination of multiple first candidate arrangement angles based on the gear arrangement space includes: Based on the gear arrangement space, a first arrangement angle range of the multi-gear is determined, and the first arrangement angle range is used to constrain the angle between the gear shafts of the multi-gear. Based on the first adjustment granularity, a plurality of first candidate arrangement angles are determined from the first arrangement angle range.

5. The method according to claim 4, wherein, The step of determining multiple first candidate arrangement angles from the first arrangement angle range based on the first adjustment granularity includes: Determine the shaft where the multi-gear is located to obtain multiple gear shafts, and determine the first gear shaft from the multiple gear shafts; The first gear shaft is fixed, and other gear shafts among the plurality of gear shafts are rotated within the first arrangement angle range by adjusting the first granularity to obtain the plurality of first candidate arrangement angles; or, other gear shafts among the plurality of gear shafts are fixed, and the first gear shaft is rotated within the first arrangement angle range by adjusting the first granularity to obtain the plurality of first candidate arrangement angles.

6. The method according to claim 4, wherein, Determining the first arrangement angle range of the multi-gear system based on the gear arrangement space includes: Based on the second adjustment granularity, a plurality of second candidate arrangement angles are determined from the gear arrangement space, wherein the second adjustment granularity is greater than the first adjustment granularity; For any one of the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle; Based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of second candidate arrangement angles, a plurality of second target arrangement angles with an overall transmission error excitation less than a preset error excitation are determined from the plurality of second candidate arrangement angles. The arrangement angles of the plurality of second targets are combined to form the first arrangement angle range of the multi-gear.

7. A multi-gear layout device for a new energy vehicle, wherein, The device includes: The first determining module is used to determine the gear arrangement space of the multi-gear of the new energy vehicle, wherein the gear arrangement space is the space in which the multi-gear is allowed to be arranged; The second determining module is used to determine a plurality of first candidate arrangement angles based on the gear arrangement space, wherein the first candidate arrangement angles are candidate angles between the gear shafts of the multi-gear; The third determining module is used to determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle for any of the plurality of first candidate arrangement angles. The overall transmission error excitation is used to represent the degree to which the multi-gear produces a whistling sound. The fourth determining module is used to determine the first target arrangement angle with the smallest overall transmission error excitation from the multiple first candidate arrangement angles, based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is one of the multiple first candidate arrangement angles. The fifth determining module is used to determine the arrangement information of the multi-gear based on the first target arrangement angle.

8. The apparatus according to claim 7, wherein, The third determining module is used to determine the phase of the transmission error excitation of multiple meshing points of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to indicate the degree of howling generated by the meshing point. The overall transmission error excitation of the multi-stage gear is determined based on the phase of the transmission error excitation at the multiple meshing points.

9. The apparatus according to claim 8, wherein, The third determining module is used to determine the transmission error of the multiple meshing points when the arrangement angle of the multi-gear is the first candidate arrangement angle. Different meshing points correspond to different transmission errors, and the transmission error of the meshing point is the deviation between the actual position and the theoretical position of the multi-gear when it meshes through the meshing point. For any one of the plurality of meshing points, Fourier decomposition is performed on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

10. The apparatus according to any one of claims 7-9, wherein, The second determining module is used to determine a first arrangement angle range of the multi-gear based on the gear arrangement space, wherein the first arrangement angle range is used to constrain the angle between the gear shafts of the multi-gear; Based on the first adjustment granularity, a plurality of first candidate arrangement angles are determined from the first arrangement angle range.

11. The apparatus according to claim 10, wherein, The second determining module is used to determine the shaft where the multi-gear is located, obtain multiple gear shafts, determine a first gear shaft from the multiple gear shafts; fix the first gear shaft, and rotate other gear shafts among the multiple gear shafts within the first arrangement angle range by using the first adjustment granularity to obtain the multiple first candidate arrangement angles; or, fix other gear shafts among the multiple gear shafts, and rotate the first gear shaft within the first arrangement angle range by using the first adjustment granularity to obtain the multiple first candidate arrangement angles.

12. The apparatus according to claim 10, wherein, The second determining module is used to determine a plurality of second candidate arrangement angles from the gear arrangement space based on a second adjustment granularity, wherein the second adjustment granularity is greater than the first adjustment granularity; For any one of the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the second candidate arrangement angle; Based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of second candidate arrangement angles, a plurality of second target arrangement angles with an overall transmission error excitation less than a preset error excitation are determined from the plurality of second candidate arrangement angles. The arrangement angles of the plurality of second targets are combined to form the first arrangement angle range of the multi-gear.

13. A computer device, wherein, The computer device includes a processor and a memory, the memory storing at least one piece of program code, the at least one piece of program code being loaded and executed by the processor to implement the multi-gear layout method in a new energy vehicle as described in any one of claims 1 to 6.

14. A computer-readable storage medium, wherein, The storage medium stores at least one piece of program code, which is loaded and executed by a processor to implement the multi-gear layout method in a new energy vehicle as described in any one of claims 1 to 6.

15. A computer program product, wherein, The product stores at least one piece of program code, which is executed by a processor to implement the multi-gear layout method in a new energy vehicle as described in any one of claims 1 to 6.

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