Layout method, device and equipment of multi-gear in new energy vehicle

Abstract

The application discloses a layout method, device and equipment of a multi-connection gear in a new energy vehicle, a storage medium and a product, and belongs to the technical field of new energy vehicles. The method comprises the following steps: determining a gear arrangement space of a multi-connection gear of a new energy vehicle; determining a plurality of first candidate arrangement angles based on the gear arrangement space, wherein the first candidate arrangement angle is a candidate angle between gear shafts of the multi-connection gear; for any first candidate arrangement angle in the plurality of first candidate arrangement angles, determining a whole transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the first candidate arrangement angle, wherein the whole transmission error excitation is used to represent the degree of howling generated by the multi-connection gear; determining a first target arrangement angle with the minimum whole transmission error excitation from the plurality of first candidate arrangement angles based on the whole transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the plurality of first candidate arrangement angles; and determining arrangement information of the multi-connection gear based on the first target arrangement angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and in particular relates to a layout method, device and equipment for a multi-connection gear in a new energy vehicle. BACKGROUND

[0002] With the continuous development of new energy vehicle technology, new energy vehicles are becoming more and more popular and the competition is becoming more and more fierce, and consumers have higher and higher requirements for the NVH (Noise, Vibration, Harshness) performance of new energy vehicles; therefore, it is urgent to reduce vibration and noise; and the gear noise generated by the multi-connection gear is one of the most important noise sources of new energy vehicles, and since new energy vehicles do not have the masking of traditional engine noise, this poses greater challenges to the layout of the gear. SUMMARY

[0003] Embodiments of the present application provide a layout method, device and equipment for a multi-connection gear in a new energy vehicle. The technical solution is as follows:

[0004] In one aspect, a layout method for a multi-connection gear in a new energy vehicle is provided, and the method comprises:

[0005] determining a gear arrangement space of a multi-connection gear of a new energy vehicle, the gear arrangement space being a space allowed for arrangement of the multi-connection gear;

[0006] based on the gear arrangement space, determining a plurality of first candidate arrangement angles, the first candidate arrangement angle being a candidate angle between gear shafts of the multi-connection gear;

[0007] for any first candidate arrangement angle in the plurality of first candidate arrangement angles, determining an overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the first candidate arrangement angle, the overall transmission error excitation being used to represent the degree of howling generated by the multi-connection gear;

[0008] based on the overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the plurality of first candidate arrangement angles, determining a first target arrangement angle with the smallest overall transmission error excitation from the plurality of first candidate arrangement angles;

[0009] based on the first target arrangement angle, determining arrangement information of the multi-connection gear.

[0010] In one possible implementation, the determination of the overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the first candidate arrangement angle comprises:

[0011] determine phases of transmission error excitations of the multiple meshing points of the multiple-connection gear when the arrangement angle of the multiple-connection gear is the first candidate arrangement angle, different meshing points correspond to different phases of transmission error excitations, and the transmission error excitation of the meshing point is used to represent a degree of howling generated by the meshing point;

[0012] determine an overall transmission error excitation of the multiple-connection gear based on the phases of transmission error excitations of the multiple meshing points.

[0013] In another possible implementation, the determining the phases of transmission error excitations of the multiple meshing points of the multiple-connection gear when the arrangement angle of the multiple-connection gear is the first candidate arrangement angle includes:

[0014] determine transmission errors of the multiple meshing points of the multiple-connection gear when the arrangement angle of the multiple-connection gear is the first candidate arrangement angle, different meshing points correspond to different transmission errors, and the transmission error of the meshing point is a deviation between an actual position and a theoretical position of the multiple-connection gear when the multiple-connection gear meshes through the meshing point;

[0015] for any meshing point in the multiple meshing points, perform Fourier decomposition on the transmission error of the meshing point to obtain the phase of the transmission error excitation of the meshing point.

[0016] In another possible implementation, the determining the multiple first candidate arrangement angles based on the gear arrangement space includes:

[0017] determine a first arrangement angle range of the multiple-connection gear based on the gear arrangement space, the first arrangement angle range being used to constrain angles between gear shafts of the multiple-connection gear;

[0018] determine the multiple first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity.

[0019] In another possible implementation, the determining the multiple first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity includes:

[0020] determine shafts on which the multiple-connection gear is located to obtain multiple gear shafts, and determine a first gear shaft from the multiple gear shafts;

[0021] fix the first gear shaft, rotate other gear shafts in the multiple gear shafts within the first arrangement angle range through the first adjustment granularity to obtain the multiple first candidate arrangement angles, or fix other gear shafts in the multiple gear shafts, and rotate the first gear shaft within the first arrangement angle range through the first adjustment granularity to obtain the multiple first candidate arrangement angles.

[0022] In another possible implementation, the determining, based on the gear arrangement space, of the first arrangement angle range of the multiple-gear is specifically configured to include:

[0023] determining, based on a second adjustment granularity, a plurality of second candidate arrangement angles from the gear arrangement space, the second adjustment granularity being greater than the first adjustment granularity;

[0024] for any second candidate arrangement angle of the plurality of second candidate arrangement angles, determining a total transmission error excitation of the multiple-gear when an arrangement angle of the multiple-gear is the second candidate arrangement angle;

[0025] based on the total transmission error excitation of the multiple-gear when the arrangement angle of the multiple-gear is the plurality of second candidate arrangement angles, determining, from the plurality of second candidate arrangement angles, a plurality of second target arrangement angles at which the total transmission error excitation is less than a preset error excitation;

[0026] grouping the plurality of second target arrangement angles into the first arrangement angle range of the multiple-gear.

[0027] In another aspect, a device for arranging a multiple-gear in a new energy vehicle is provided, and the device includes:

[0028] a first determining module configured to determine a gear arrangement space of a multiple-gear in a new energy vehicle, the gear arrangement space being a space in which the multiple-gear is allowed to be arranged;

[0029] a second determining module configured to determine, based on the gear arrangement space, a plurality of first candidate arrangement angles, the first candidate arrangement angle being a candidate angle between gear shafts of the multiple-gear;

[0030] a third determining module configured to, for any first candidate arrangement angle of the plurality of first candidate arrangement angles, determine a total transmission error excitation of the multiple-gear when an arrangement angle of the multiple-gear is the first candidate arrangement angle, the total transmission error excitation being used to represent a degree of howling generated by the multiple-gear;

[0031] a fourth determining module configured to, based on the total transmission error excitation of the multiple-gear when the arrangement angle of the multiple-gear is the plurality of first candidate arrangement angles, determine, from the plurality of first candidate arrangement angles, a first target arrangement angle at which the total transmission error excitation is the smallest;

[0032] a fifth determining module configured to determine, based on the first target arrangement angle, arrangement information of the multiple-gear.

[0033] In a possible implementation, the third determining module is configured to: determine phases of transmission error excitations of the multiple engagement points of the multiple-connection gear when the arrangement angle of the multiple-connection gear is the first candidate arrangement angle, different engagement points correspond to different phases of transmission error excitations, and the transmission error excitation of an engagement point represents a degree of howling generated by the engagement point; and determine an overall transmission error excitation of the multiple-connection gear based on the phases of the transmission error excitations of the multiple engagement points.

[0034] In another possible implementation, the third determining module is configured to: determine transmission errors of the multiple engagement points of the multiple-connection gear when the arrangement angle of the multiple-connection gear is the first candidate arrangement angle, different engagement points correspond to different transmission errors, and the transmission error of an engagement point is a deviation between an actual position and a theoretical position of the multiple-connection gear when the multiple-connection gear engages through the engagement point; and perform Fourier decomposition on the transmission error of any engagement point of the multiple engagement points to obtain a phase of a transmission error excitation of the engagement point.

[0035] In another possible implementation, the second determining module is configured to: determine a first arrangement angle range of the multiple-connection gear based on the gear arrangement space, the first arrangement angle range being used to constrain angles between gear shafts of the multiple-connection gear; and determine multiple first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity.

[0036] In another possible implementation, the second determining module is configured to: determine shafts on which the multiple-connection gear is located to obtain multiple gear shafts, determine a first gear shaft from the multiple gear shafts; fix the first gear shaft, and rotate other gear shafts of the multiple gear shafts within the first arrangement angle range through the first adjustment granularity to obtain the multiple first candidate arrangement angles; or fix other gear shafts of the multiple gear shafts, and rotate the first gear shaft within the first arrangement angle range through the first adjustment granularity to obtain the multiple first candidate arrangement angles.

[0037] 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, the second adjustment granularity being greater than the first adjustment granularity; for any second candidate arrangement angle in the plurality of second candidate arrangement angles, determine the overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the second candidate arrangement angle; determine a plurality of second target arrangement angles from the plurality of second candidate arrangement angles based on the overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the plurality of second candidate arrangement angles, the overall transmission error excitation of the multi-connection gear being less than a preset error excitation; and group the plurality of second target arrangement angles to form the first arrangement angle range of the multi-connection gear.

[0038] In another aspect, a computer device is provided, which includes a processor and a memory, and the memory stores at least one program code, which is loaded and executed by the processor to implement the above-mentioned layout method of the multi-connection gear in the new energy vehicle.

[0039] In another aspect, a computer readable storage medium is provided, which stores at least one program code, which is loaded and executed by a processor to implement the above-mentioned layout method of the multi-connection gear in the new energy vehicle.

[0040] In another aspect, a computer program product is provided, which stores at least one program code, which is used to be executed by a processor to implement the above-mentioned layout method of the multi-connection gear in the new energy vehicle.

[0041] In the embodiments of the present application, when the multi-connection gear is laid out, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-connection gear, which is used to represent the degree of howling of the multi-connection gear; therefore, the first target arrangement angle with the minimum overall transmission error excitation is selected from the plurality of first candidate arrangement angles, which can reduce the noise of the multi-connection gear; therefore, the embodiments of the present application can not only make the laid-out multi-connection gear meet the requirements of the overall layout space and size, i.e., taking into account the lightweight, but also reduce the noise of the multi-connection gear, i.e., guarantee the NVH performance of the gear.

[0042] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a schematic diagram of the implementation environment of the layout method of the multi-connection gear in the new energy vehicle according to an exemplary embodiment of the present application;

[0044] Figure 2 is a flow chart of a layout method of a multiple gear in a new energy vehicle according to an example embodiment of the present application;

[0045] Figure 3 is a schematic diagram of a multiple gear according to an example embodiment of the present application;

[0046] Figure 4 is a schematic diagram of an arrangement angle of a multiple gear according to an example embodiment of the present application;

[0047] Figure 5 is a schematic diagram of an engagement point of a multiple gear according to an example embodiment of the present application;

[0048] Figure 6 is a schematic diagram of a phase of a whole transmission error excitation of a plurality of first candidate arrangement angles according to an example embodiment of the present application;

[0049] Figure 7 is a flow chart of a layout method of a multiple gear in a new energy vehicle according to an example embodiment of the present application;

[0050] Figure 8 is a block diagram of a layout device of a multiple gear in a new energy vehicle according to an example embodiment of the present application;

[0051] Figure 9 is a block diagram of a computer device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to make the technical solutions and advantages of the present application clearer, the following further describes the embodiments of the present application in detail.

[0053] The terms "first", "second", "third", and "fourth" and the like in the description and claims of the present application and the accompanying drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed or can optionally include other steps or units inherent to the process, method, product or device.

[0054] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the present application are authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the gear arrangement space involved in the present application is obtained under full authorization.

[0055] Reference is made to Figure 1 which shows a schematic diagram of an implementation environment of a layout method of a multi-connection gear in a new energy vehicle according to an example embodiment of the present application. The implementation environment includes a computer device 101 and a new energy vehicle 102, and the new energy vehicle 102 is provided with a multi-connection gear, which includes a plurality of gears that are engaged in sequence. The number of gears included in the multi-connection gear can be set and changed according to the needs of the new energy vehicle 102, and in the example embodiment of the present application, the number of gears included in the multi-connection gear is not specifically limited. For example, the multi-connection gear includes 3 gears or 4 gears, etc. In the example embodiment of the present application, the computer device 101 is used to determine the layout of the multi-connection gear; and the computer device 101 uses a CAE (Computer Aided Engineering, Computer Aided Engineering in engineering design) research and analysis means to determine the layout of the multi-connection gear.

[0056] In a possible implementation, the development trend of the transmission of the new energy vehicle is powerful, economical, compact and lightweight. In order to meet the power and economy, the new energy vehicle often needs to match a motor with a relatively large outer diameter; if it is a multi-gear multi-mode architecture, a plurality of clutches with a larger outer diameter size are arranged on the input shaft of the engine of the new energy vehicle. In order to avoid interference between the clutch and the driving motor, there must be a larger center distance between the motor driving shaft and the engine input shaft. Such a large center distance makes it difficult to use only one pair of gears (2 gears) to transmit motor power from the motor driving shaft to the engine input shaft. Therefore, in order to match such a large center distance, an idler gear needs to be added between the two gears, which forms a structure in which three or more gears are engaged at the same time, i.e. a multi-connection gear.

[0057] In another possible implementation, in a common multi-power coupling form, motor power and engine power are finally transmitted to the output shaft for coupling. In order to reduce the number of intermediate shafts and transmission gear pairs, a multi-power source shared gear pair is used, i.e. the gear shared by the motor and the engine is a multi-connection gear.

[0058] The computer device 101 can be a tablet computer, a notebook computer, a desktop computer, or a smart phone, but is not limited thereto. For example, the computer device 101 is a notebook computer used by a developer of the new energy vehicle 102. The developer sets a layout of a multi-gear of the new energy vehicle 102 through the computer device 101.

[0059] In the related art, when the multi-gear is laid out, the multi-gear is only roughly arranged according to a gear layout space, so that the multi-gear can be arranged in the gear layout space, without considering NVH design problems, which often causes phase superposition of a transmission error excitation of the multi-gear, and the transmission error excitation of the multi-gear is used to represent a degree of howling of the multi-gear. The phase superposition of the transmission error excitation of the multi-gear causes the degree of howling of the multi-gear to be greater, so that the noise generated by the multi-gear is greater, and thus more serious NVH problems are caused.

[0060] In the embodiment of the present application, when the multi-gear is laid out, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear is considered, and the overall transmission error excitation is used to represent the degree of howling of the multi-gear. Therefore, selecting the first target arrangement angle with the minimum overall transmission error excitation from the plurality of first candidate arrangement angles can reduce the noise of the multi-gear. Therefore, the embodiment of the present application not only enables the laid-out multi-gear to meet the requirements of the overall layout space and size of the whole box, that is, to consider lightweight, but also reduces the noise of the multi-gear, that is, to ensure the NVH performance of the gear.

[0061] Please refer to Figure 2 which shows a flowchart of a layout method of a multi-gear in a new energy vehicle according to an exemplary embodiment of the present application. Please refer to Figure 2 The method comprises the following steps.

[0062] Step 201: The computer device determines a gear layout space of a multi-gear of a new energy vehicle. The gear layout space is a space allowed for arrangement of the multi-gear.

[0063] The developer sets a design drawing of the new energy vehicle in advance, and the gear layout space of the multi-gear is marked in the drawing. In this step, the computer device determines the gear layout space of the multi-gear from the design drawing of the new energy vehicle.

[0064] The multi-connection gear can be a multi-connection gear between a motor and an engine of a new energy vehicle or a multi-connection gear in a multi-power coupling form. Therefore, the scheme provided in the embodiments of the present application can be applicable to the design of the multi-connection gear or the tooth shaft system of the coaxial system in the multi-power coupling structure form of the new energy transmission. The method for arranging and designing the NVH of the multi-connection gear or the coaxial system provided in the embodiments of the present application can be used in the tooth shaft design of any transmission or mechanical system with high requirements on the NVH performance. The specific form of the design can be optimally designed in each dimension according to the actual structure form and the analysis result.

[0065] Step 202: The computer device determines a plurality of first candidate arrangement angles between the gear shafts of the multi-connection gear based on the gear arrangement space, where the first candidate arrangement angle is a candidate angle between the gear shafts of the multi-connection gear.

[0066] The multi-connection gear includes a plurality of gears that are engaged in sequence; for example, refer to Figure 3 The multi-connection gear includes gears 1, 2 and 3 that are engaged in sequence; in Figure 3 The gear shaft on which the gear 1 is located, the gear shaft on which the gear 2 is located and the gear shaft on which the gear 3 is located are marked. The first candidate arrangement angle can be an included angle between lines formed by the center points of two adjacent gears in the plurality of gears that are engaged in sequence; for example, refer to Figure 4 The gear 1 and the gear 2 are engaged, the gear 2 and the gear 3 are engaged, the center point of the gear 1 and the center point of the gear 2 form a first boundary line, the center point of the gear 2 and the center point of the gear 3 form a second boundary line, and the first boundary line and the second boundary line form the arrangement angle.

[0067] Step 203: For any first candidate arrangement angle in the plurality of first candidate arrangement angles, the computer device determines an overall transmission error excitation of the multi-connection gear when the arrangement angle of the multi-connection gear is the first candidate arrangement angle, and the overall transmission error excitation is used to represent the degree of howling generated by the multi-connection gear.

[0068] The overall transmission error excitation is positively correlated with the degree of howling generated by the multi-connection gear, that is, the greater the overall transmission error excitation, the greater the howling generated by the multi-connection gear, that is, the greater the noise generated by the multi-connection gear; and the smaller the overall transmission error excitation, the smaller the howling generated by the multi-connection gear, that is, the smaller the noise generated by the multi-connection gear.

[0069] In a possible implementation, the present step can be implemented through the following steps (1) and (2), comprising:

[0070] (1) The computer device determines the phase of the transmission error excitation of a plurality of meshing points of the multi-connection gear when the arrangement angle of the multi-connection gear is the first candidate arrangement angle, different meshing points correspond to different phases of the transmission error excitation, and the transmission error excitation of the meshing point is used to represent the degree of howling generated by the meshing point.

[0071] The phase of the transmission error excitation is used to represent the direction of the transmission error excitation. When the phases of the transmission error excitations of multiple meshing points are exactly opposite, the transmission error excitations of the multiple meshing points can cancel each other out, and the howling generated by the multiple gear can be reduced, and the noise can be further reduced. The meshing point refers to the position where the two gears mesh. For example, please refer to Figure 5 The meshing points of the gear 1 and the gear 2 are marked in Figure 5 The meshing points of the gear 2 and the gear 3 are also marked.

[0072] In a possible implementation, the step can be implemented through the following steps (1-1) to (1-2), comprising:

[0073] (1-1) The computer device determines the transmission errors of multiple meshing points when the arrangement angle of the multiple 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 when the multiple gear meshes through the meshing point.

[0074] For any meshing point, the computer device determines the actual position and the theoretical position of the meshing point, and determines the deviation between the actual position and the theoretical position to obtain the transmission error of the meshing point. Since there are multiple meshing points, the computer device can determine the transmission errors of multiple meshing points.

[0075] (1-2) For any meshing point in 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.

[0076] The phase of the transmission error excitation of the meshing point can be the phase of the fundamental frequency of the transmission error of the meshing point or the phase of the multiple frequency of the transmission error. In addition, the computer device can also obtain the amplitude of the transmission error excitation of the meshing point by performing Fourier decomposition on the transmission error of the meshing point. The amplitude of the transmission error excitation of the meshing point can be the amplitude of the fundamental frequency of the transmission error of the meshing point or the amplitude of the multiple frequency of the transmission error.

[0077] (2) The computer device determines the overall transmission error excitation of the multiple gear based on the phases of the transmission error excitations of the multiple meshing points.

[0078] The computer device determines the superposition of the phases of the transmission error excitations of the multiple meshing points to obtain the overall transmission error excitation of the multiple gear. For example, the multiple meshing points include a meshing point 1 and a meshing point 2, and the phases of the transmission error excitations of the meshing point 1 and the meshing point 2 are +30 and -30 respectively. The superposition of the phases of the transmission error excitations of the multiple meshing points is 0, and the transmission error excitations of the multiple meshing points cancel each other out, thereby reducing the overall transmission error excitation of the multiple gear.

[0079] 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.

[0080] 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 determines the phase and amplitude of the transmission error excitation at multiple meshing points and superimposes them 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.

[0081] 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.

[0082] The overall transmission error excitation is used to represent the degree of squealing produced by 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 multi-gear.

[0083] 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.

[0084] For example, please refer to Figure 6 The multiple first candidate arrangement angles are angle 1, angle 2, angle 3, angle 4, and angle 5. Figure 6 The phases of the overall propagation error excitation for angles 1, 2, 3, 4, and 5 are marked, 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.

[0085] In the embodiment of the present application, since the gear arrangement space dimension is combined when the plurality of first candidate arrangement angles are determined, the embodiment of the present application can realize the layout of the multi-connection gear combining the overall box size and the lightweight dimension.

[0086] Step 205: The computer device determines the arrangement information of the multi-connection gear based on the first target arrangement angle.

[0087] The arrangement information of the multi-connection gear is used to indicate the arrangement angle between the gear shafts of the multi-connection gear, that is, the computer device sets the arrangement angle between the gear shafts of the multi-connection gear as the first target arrangement angle.

[0088] In the embodiment of the present application, when the multi-connection gear is laid out, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-connection gear, which is used to represent the degree of howling of the multi-connection gear; therefore, selecting the first target arrangement angle with the minimum overall transmission error excitation from the plurality of first candidate arrangement angles can reduce the noise of the multi-connection gear; therefore, the embodiment of the present application can not only make the laid-out multi-connection gear meet the requirements of the overall box layout space and size, that is, take into account the lightweight, but also reduce the noise of the multi-connection gear, that is, ensure the NVH performance of the gear.

[0089] Please refer to Figure 7 which shows the flowchart of the layout method of the multi-connection gear in the new energy vehicle according to an example embodiment of the present application. Please refer to Figure 7 The method comprises the following steps:

[0090] Step 701: The computer device determines the gear arrangement space of the multi-connection gear of the new energy vehicle, and the gear arrangement space is the space allowed for the arrangement of the multi-connection gear.

[0091] In some embodiments, this step is the same as step 201, which will not be described here.

[0092] Step 702: The computer device determines the first arrangement angle range of the multi-connection gear based on the gear arrangement space, and the first arrangement angle range is used to constrain the angle between the gear shafts of the multi-connection gear.

[0093] In the embodiment of the present application, the computer device uses the CAE research and analysis method, first arranges the candidate arrangement angle according to a certain shaft rotation mode, and takes the angle between the shafts as the design variable of angle optimization. According to the design space, the first round of optimization can first use a larger angle interval to perform rough optimization, and according to the comparison result, the optimal design angle range is preliminarily determined, and the second round of optimization is performed to further narrow the angle range and complete the precise optimization. Correspondingly, this step can be realized through the following steps (1) to (4), comprising:

[0094] (1) The computer device determines a plurality of second candidate arrangement angles of the plurality of gears from the gear arrangement space based on a second adjustment granularity, the second adjustment granularity being greater than the first adjustment granularity.

[0095] The design method first considers the shafting arrangement space available for optimization in combination with the whole-box boundary, adopts a form of fixing one shaft and rotating other shafts or rotating one shaft and fixing other shafts according to the feasible space range, rotates the shafting along the clockwise or counterclockwise direction, and makes each shaft be at a different relative position, so that the shaft angle changes, and the gear meshing position changes simultaneously. Finally, the gear meshing condition is adjusted by adjusting the shaft angle.

[0096] In a possible implementation, the plurality of second candidate arrangement angles are determined by fixing one shaft and rotating other shafts. Correspondingly, the step can be that the computer device determines the shafts where the plurality of gears are located to obtain a plurality of gear shafts, and determines a second gear shaft from the plurality of gear shafts; the first gear shaft is fixed, and other gear shafts in the plurality of gear shafts are rotated in the gear arrangement space by the second adjustment granularity to obtain the plurality of second candidate arrangement angles. When the other gear shafts in the plurality of gear shafts are selected in the gear layout space, the other gear shafts can be rotated clockwise or counterclockwise.

[0097] In another possible implementation, the plurality of second candidate arrangement angles are determined by rotating one shaft and fixing other shafts. Correspondingly, the step can be that the computer device determines the shafts where the plurality of gears are located to obtain a plurality of gear shafts, and determines a second gear shaft from the plurality of gear shafts; other gear shafts in the plurality of gear shafts are fixed, and the second gear shaft is rotated in the gear layout space by the second adjustment granularity to obtain the plurality of second candidate arrangement angles. When the second gear shaft is rotated in the gear layout space, the second gear shaft can be rotated clockwise or counterclockwise.

[0098] (2) For any second candidate arrangement angle in the plurality of second candidate arrangement angles, the computer device determines the overall transmission error excitation of the plurality of gears when the arrangement angle of the plurality of gears is the second candidate arrangement angle.

[0099] The process of determining the overall transmission error excitation of the plurality of gears when the arrangement angle of the plurality of gears is the second candidate arrangement angle by the computer device is similar to the process of determining the overall transmission error excitation of the plurality of gears when the arrangement angle of the plurality of gears is the first candidate arrangement angle by the computer device, and will not be described herein again.

[0100] (3) The computer device determines a plurality of second target arrangement angles with overall transmission error excitations less than the preset error excitation from the plurality of second candidate arrangement angles based on the overall transmission error excitations of the plurality of gears when the arrangement angle of the plurality of gears is the plurality of second candidate arrangement angles.

[0101] (4) The computer device groups the plurality of second target arrangement angles into a first arrangement angle range of the multi-gear.

[0102] In a possible implementation, in a case where the plurality of second target arrangement angles are continuous angles, the computer device directly groups the plurality of second target arrangement angles into the first arrangement angle range of the multi-gear; in a case where the plurality of second target arrangement angles are not continuous angles, the computer device determines a plurality of continuous angles from the plurality of second target arrangement angles, and groups the plurality of continuous angles into the first arrangement angle range; or, in a case where the plurality of second target arrangement angles are not continuous angles, the computer device determines a maximum arrangement angle range formed by the plurality of second target arrangement angles as the first arrangement angle range; or, in a case where the plurality of second target arrangement angles are not continuous angles, the computer device determines a minimum arrangement angle range formed by the plurality of second target arrangement angles as the first arrangement angle range.

[0103] 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.

[0104] In a possible implementation, the computer device determines the plurality of first candidate arrangement angles by fixing one of the axes and rotating the other axes; correspondingly, this step can be: the computer device determines axes where the multi-gear is located to obtain a plurality of gear axes, and determines a first gear axis from the plurality of gear axes; fixes the first gear axis, and rotates other gear axes in the plurality of gear axes within the first arrangement angle range by the first adjustment granularity to obtain the plurality of first candidate arrangement angles.

[0105] In another possible implementation, the computer device determines the plurality of second candidate arrangement angles by rotating one of the axes and fixing the other axes; correspondingly, this step can be: the computer device determines axes where the multi-gear is located to obtain a plurality of gear axes, and determines a first gear axis from the plurality of gear axes; fixes other gear axes in the plurality of gear axes, and rotates the first gear axis within the first arrangement angle range by the first adjustment granularity to obtain the plurality of first candidate arrangement angles.

[0106] Step 704: For any first candidate arrangement angle in the plurality of first candidate arrangement angles, the computer device determines a total transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the first candidate arrangement angle, and the total transmission error excitation is used to represent a degree of howling generated by the multi-gear.

[0107] In some embodiments, this step is the same as step 203, which is not described here again.

[0108] Step 705: The computer device determines a first target arrangement angle with the minimum overall transmission error excitation from the plurality of first candidate arrangement angles based on the overall transmission error excitation of the multi-gear when the arrangement angle of the multi-gear is the plurality of first candidate arrangement angles.

[0109] In some embodiments, the present step is the same as step 204, which will not be repeated here.

[0110] Step 706: The computer device determines the arrangement information of the multi-gear based on the first target arrangement angle.

[0111] In some embodiments, the present step is the same as step 205, which will not be repeated here.

[0112] In the embodiments of the present application, the plurality of first candidate arrangement angles are determined by two rounds of optimization. In the first round of optimization, a slightly larger angle interval is used for rough optimization, and a better design angle range is determined according to the comparison result, and then the second round of optimization is performed to further narrow the angle range and complete the precise optimization, thereby improving the efficiency of determining the plurality of first candidate arrangement angles.

[0113] In the embodiments of the present application, when the multi-gear is laid out, not only the gear layout space is considered, but also the overall transmission error excitation of the multi-gear, which is used to represent the degree of howling of the multi-gear. Therefore, the first target arrangement angle with the minimum overall transmission error excitation is selected from the plurality of first candidate arrangement angles, which can reduce the noise of the multi-gear. Therefore, the embodiments of the present application can not only meet the requirements of the overall layout space and size of the layout multi-gear, i.e., taking into account the lightweight, but also reduce the noise of the multi-gear, i.e., ensuring the NVH performance of the gear.

[0114] Please refer to Figure 8 which shows a block diagram of a layout device of a multi-gear in a new energy vehicle according to an exemplary embodiment of the present application. The device comprises:

[0115] A first determination module 801 is configured to determine a gear arrangement space of a multi-gear of a new energy vehicle, wherein the gear arrangement space is a space allowed for arrangement of the multi-gear.

[0116] A second determination module 802 is configured to determine a plurality of first candidate arrangement angles based on the gear arrangement space, wherein the first candidate arrangement angle is a candidate angle between gear shafts of the multi-gear.

[0117] The third determining module 803 is configured to determine, for any first candidate arrangement angle in the plurality of first candidate arrangement angles, a total transmission error excitation of the multiple gear when the arrangement angle of the multiple gear is the first candidate arrangement angle, where the total transmission error excitation is used to represent a degree of howling of the multiple gear.

[0118] The fourth determining module 804 is configured to determine, from the plurality of first candidate arrangement angles, a first target arrangement angle with the minimum total transmission error excitation based on the total transmission error excitation of the multiple gear when the arrangement angle of the multiple gear is the plurality of first candidate arrangement angles.

[0119] The fifth determining module 805 is configured to determine the arrangement information of the multiple gear based on the first target arrangement angle.

[0120] In a possible implementation, the third determining module 803 is configured to determine a phase of transmission error excitation of a plurality of meshing points of the multiple gear when the arrangement angle of the multiple gear is the first candidate arrangement angle, where different meshing points correspond to different phases of transmission error excitation, and the transmission error excitation of the meshing point is used to represent a degree of howling of the meshing point; and determine the total transmission error excitation of the multiple gear based on the phases of transmission error excitation of the plurality of meshing points.

[0121] In another possible implementation, the third determining module 803 is configured to determine a transmission error of the plurality of meshing points when the arrangement angle of the multiple gear is the first candidate arrangement angle, where different meshing points correspond to different transmission errors, and the transmission error of the meshing point is a deviation between an actual position and a theoretical position of the multiple gear when the multiple gear meshes through the meshing point; and perform Fourier decomposition on the transmission error of any meshing point in the plurality of meshing points to obtain a phase of transmission error excitation of the meshing point.

[0122] In another possible implementation, the second determining module 802 is configured to determine a first arrangement angle range of the multiple gear based on the gear arrangement space, where the first arrangement angle range is used to constrain an angle between gear shafts of the multiple gear; and determine a plurality of first candidate arrangement angles from the first arrangement angle range based on a first adjustment granularity.

[0123] In a possible implementation, the second determining module 802 is configured to determine the shafts on which the multiple gear sets are located, to obtain a plurality of gear shafts, and to determine a first gear shaft from the plurality of gear shafts; to fix the first gear shaft, to rotate other gear shafts in the plurality of gear shafts by the first adjustment granularity within the first arrangement angle range, and to obtain the plurality of first candidate arrangement angles; or to fix other gear shafts in the plurality of gear shafts, to rotate the first gear shaft by the first adjustment granularity within the first arrangement angle range, and to obtain the plurality of first candidate arrangement angles.

[0124] In a 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, where the second adjustment granularity is greater than the first adjustment granularity; to determine, for any second candidate arrangement angle in the plurality of second candidate arrangement angles, the overall transmission error excitation of the multiple gear set when the arrangement angle of the multiple gear set is the second candidate arrangement angle; to determine, from the plurality of second candidate arrangement angles, a plurality of second target arrangement angles at which the overall transmission error excitation of the multiple gear set is less than a preset error excitation, based on the overall transmission error excitation of the multiple gear set when the arrangement angle of the multiple gear set is the plurality of second candidate arrangement angles; and to form the first arrangement angle range of the multiple gear set by using the plurality of second target arrangement angles.

[0125] In the embodiments of the present application, when the multiple gear set is laid out, not only the gear arrangement space is considered, but also the overall transmission error excitation of the multiple gear set, which is used to represent the degree of howling of the multiple gear set. Therefore, the first target arrangement angle with the minimum overall transmission error excitation is selected from the plurality of first candidate arrangement angles, so as to reduce the noise of the multiple gear set. Therefore, the embodiments of the present application not only enable the laid-out multiple gear set to meet the requirements of the overall layout space and size, that is, to take into account the lightweight, but also reduce the noise of the multiple gear set, that is, to ensure the NVH performance of the gear.

[0126] It should be noted that the layout device of the multiple gear set in the new energy vehicle provided in the above embodiments is only exemplified by the division of the above functional modules when the multiple gear set in the new energy vehicle is laid out. In actual applications, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the computer device is divided into different functional modules to complete all or part of the functions described above. In addition, the layout device of the multiple gear set in the new energy vehicle and the layout method of the multiple gear set in the new energy vehicle provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be described here.

[0127] Figure 9is a structural block diagram of a computer device 900 provided by an embodiment of the present application. The computer device 900 can be a portable mobile terminal, such as a smartphone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 (Moving Picture Experts Group Audio Layer IV) player, a notebook computer, or a desktop computer. The computer device 900 can also be referred to as a user device, a portable terminal, a laptop terminal, a desktop terminal, or other names.

[0128] Generally, the computer device 900 includes a processor 901 and a memory 902.

[0129] The processor 901 can include one or more processing cores, such as a 4-core processor, an 8-core processor, or the like. The processor 901 can be implemented in at least one of a hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), a PLA (Programmable Logic Array). The processor 901 can also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also referred to as a CPU (Central Processing Unit). The coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 901 can be integrated with a GPU (Graphics Processing Unit) for rendering and drawing content required to be displayed by a display screen. In some embodiments, the processor 901 can further include an AI (Artificial Intelligence) processor for processing machine learning-related computing operations.

[0130] The memory 902 can include one or more computer-readable storage media, which can be non-transitory. The memory 902 can also include a high-speed random access memory, and a non-volatile memory such as one or more disk storage devices, flash storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 902 is used to store at least one program code for being executed by the processor 901 to implement the layout method of a multi-connection gear in a new energy vehicle provided by the method embodiment of the present application.

[0131] In some embodiments, the computer device 900 can further include a peripheral device interface 903 and at least one peripheral device. The processor 901, the memory 902 and the peripheral device interface 903 can be connected through a bus or a signal line. Each peripheral device can be connected to the peripheral device interface 903 through a bus, a signal line or a circuit board. Specifically, the peripheral device includes at least one of a radio frequency circuit 904, a display screen 905, a camera component 906, an audio circuit 907 and a power supply 908.

[0132] The peripheral device interface 903 can be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 901 and the memory 902. In some embodiments, the processor 901, the memory 902 and the peripheral device interface 903 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 901, the memory 902 and the peripheral device interface 903 can be implemented on a separate chip or circuit board, and the present embodiments are not limited in this regard.

[0133] The radio frequency circuit 904 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 904 communicates with a communication network and other communication devices through electromagnetic signals. The radio frequency circuit 904 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency 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 subscriber identity module card, and the like. The radio frequency circuit 904 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes but is not limited to the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 904 can also include NFC (Near Field Communication) related circuitry, which is not limited in the present application.

[0134] The display screen 905 is configured to display a UI (User Interface). The UI can include graphics, text, icons, video, and any combination thereof. When the display screen 905 is a touch display screen, the display screen 905 is further configured to capture touch signals on or above the surface of the display screen 905. The touch signals can be input to the processor 901 as control signals for processing. In this case, the display screen 905 can also be configured to provide virtual buttons and / or virtual keyboard, also known as soft buttons and / or soft keyboard. In some embodiments, the display screen 905 can be one, disposed on the front panel of the computer device 900; in other embodiments, the display screen 905 can be at least two, respectively disposed on different surfaces of the computer device 900 or in a folding design; in other embodiments, the display screen 905 can be a flexible display screen, disposed on a curved surface or a folding surface of the computer device 900. Even, the display screen 905 can also be disposed in an irregular shape, i.e., a special-shaped screen. The display screen 905 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), etc.

[0135] The camera assembly 906 is configured to capture images or videos. Optionally, the camera assembly 906 includes a front camera and a rear camera. Typically, the front camera is disposed on the front panel of the terminal, and the rear camera is disposed on the back of the terminal. In some embodiments, the rear camera is at least two, which are any one of a main camera, a depth-of-field camera, a wide-angle camera, and a telephoto camera, to realize the background blur function by fusing the main camera and the depth-of-field camera, the panoramic shooting and VR (Virtual Reality) shooting function by fusing the main camera and the wide-angle camera, or other fusion shooting functions. In some embodiments, the camera assembly 906 can further include a flash. The flash can be a single-color-temperature flash or a dual-color-temperature flash. The dual-color-temperature flash refers to the combination of a warm light flash and a cold light flash, which can be used for light compensation under different color temperatures.

[0136] The audio circuit 907 can include a microphone and a speaker. The microphone is used to collect sound waves of the user and the environment, and convert the sound waves into an electrical signal input to the processor 901 for processing, or input to the radio frequency circuit 904 to realize voice communication. For the purpose of stereo sound collection or noise reduction, the microphone can be multiple, respectively arranged at different parts of the computer device 900. The microphone can also be an array microphone or an omnidirectional collection type microphone. The speaker is used to convert the electrical signal from the processor 901 or the radio frequency circuit 904 into sound waves. The speaker can be a conventional diaphragm speaker, or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only can it convert electrical signals into sound waves that humans can hear, but it can also convert electrical signals into sound waves that humans cannot hear for ranging purposes. In some embodiments, the audio circuit 907 can also include a headphone jack.

[0137] The power supply 908 is used to power the various components in the computer device 900. The power supply 908 can be alternating current, direct current, disposable battery or rechargeable battery. When the power supply 908 includes a rechargeable battery, the rechargeable battery can be a wired charging battery or a wireless charging battery. The wired charging battery is a battery that is charged through a wired line, and the wireless charging battery is a battery that is charged through a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0138] 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 acceleration sensor 910, a gyroscope sensor 911, a pressure sensor 912, an optical sensor 913, and a proximity sensor 914.

[0139] The acceleration sensor 910 can detect the acceleration magnitude in three coordinate axes of the coordinate system established by the computer device 900. For example, the acceleration sensor 910 can be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 901 can control the display screen 905 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 910. The acceleration sensor 910 can also be used for game or user motion data collection.

[0140] The gyroscope sensor 911 can detect the body orientation and rotation angle of the computer device 900, and the gyroscope sensor 911 can collect 3D actions of the user on the computer device 900 in cooperation with the acceleration sensor 910. The processor 901 can realize the following functions according to the data collected by the gyroscope sensor 911: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization when shooting, game control, and inertial navigation.

[0141] The pressure sensor 912 can be arranged at the side frame of the computer device 900 and / or the lower layer of the display screen 905. When the pressure sensor 912 is arranged at the side frame of the computer device 900, the holding signal of the user to the computer device 900 can be detected, and the left-hand or right-hand recognition or shortcut operation can be performed by the processor 901 according to the holding signal collected by the pressure sensor 912. When the pressure sensor 912 is arranged at the lower layer of the display screen 905, the operability control on the UI interface can be controlled by the processor 901 according to the pressure operation of the user to the display screen 905. The operability control includes at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0142] The optical sensor 913 is configured to collect the ambient light intensity. In an embodiment, the processor 901 can control the display brightness of the display screen 905 according to 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 parameter of the camera assembly 906 according to the ambient light intensity collected by the optical sensor 913.

[0143] The proximity sensor 914, also referred to as a distance sensor, is usually arranged at the front panel of the computer device 900. The proximity sensor 914 is configured to collect the distance between the user and the front of the computer device 900. In an embodiment, when the proximity sensor 914 detects that the distance between the user and the front of the computer device 900 gradually decreases, the display screen 905 is switched from the bright screen state to the off-screen state by the processor 901; when the proximity sensor 914 detects that the distance between the user and the front of the computer device 900 gradually increases, the display screen 905 is switched from the off-screen state to the bright screen state by the processor 901.

[0144] Those skilled in the art can understand that the structure shown in the above embodiments does not constitute a limitation on the computer device 900, and the computer device 900 can include more or fewer components than those shown in the figure, or combine certain components, or adopt a different component arrangement. Figure 9 Those skilled in the art can understand that the structure shown in the above embodiments does not constitute a limitation on the computer device 900, and the computer device 900 can include more or fewer components than those shown in the figure, or combine certain components, or adopt a different component arrangement.

[0145] The embodiment of the present application further provides a computer readable storage medium, and at least one program code is stored in the computer readable storage medium. The at least one program code is loaded and executed by a processor to implement the layout method of the multi-connection gear in the new energy vehicle according to any of the above implementation manners. Optionally, the storage medium can be a non-transitory computer readable storage medium, for example, the non-transitory computer readable storage medium can be a ROM (Read-Only Memory), a RAM (Random Access Memory), a CD-ROM (Compact Disc Read-Only Memory), a magnetic tape, a floppy disk, an optical data storage device and the like.

[0146] The embodiment of the present application further provides a computer program product, and at least one program code is stored in the computer program product. The at least one program code is loaded and executed by a processor to implement the layout method of the multi-connection gear in the new energy vehicle according to each of the above embodiments.

[0147] In some embodiments, the computer program product related to the embodiment of the present application can be deployed on a computer device for execution, or on multiple computer devices located in one place, or on multiple computer devices distributed in multiple places and interconnected through a communication network. The multiple computer devices distributed in multiple places and interconnected through a communication network can constitute a blockchain system.

[0148] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by a program instructing related hardware, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk.

[0149] The above is only for the convenience of those skilled in the art to understand the technical solutions of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for arranging multi-gear systems in a new energy vehicle, characterized in that, 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; 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. Based on the phase of the transmission error excitation at the multiple meshing points, the overall transmission error excitation of the multi-gear is determined.

2. The method according to claim 1, characterized in that, 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.

3. The method according to claim 1, characterized in that, 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.

4. The method according to claim 3, characterized in that, 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.

5. The method according to claim 3, characterized in that, 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.

6. A multi-gear layout device for a new energy vehicle, characterized in that, 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; 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.

7. A computer device, characterized in that, 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 5.

8. A computer-readable storage medium, characterized in that, 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 5.

9. A computer program product, characterized in that, 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 5.

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