Transmission error design method, device, equipment, storage medium and computer program product

Abstract

The present application discloses a transmission error design method, apparatus, equipment, storage medium and computer program product, which relate to the field of automotive technology. The method performs performance testing on an electric drive box, causing the electric drive box to operate in sequence under test conditions of multiple preset electric drive torques in a linear pattern at different real-time electric drive speeds, and collects the noise generated by the electric drive box under each test condition. At the same time, the transmission error of the electric drive box during the performance test is calculated and obtained. A transmission error linear correlation function is constructed through the above four variables to represent the linear relationship between noise and transmission error. The noise value required by the customer can be directly substituted into the transmission error linear correlation function corresponding to a certain type of electric drive box to directly obtain the corresponding target transmission error, thereby assisting staff in meeting customer requirements at the lowest cost when designing the transmission error, greatly reducing the design workload, increasing production profits and improving work efficiency.

Description

Technical Field

[0001] The present application relates to the field of automotive technology, and in particular to a transmission error design method, device, equipment, storage medium, and computer program product. Background Art

[0002] With the advancement of science and technology, electric vehicles are gradually replacing traditional fuel vehicles. As a key power source for electric vehicles, the performance of the electric drive box within it can completely determine an electric vehicle's market competitiveness. However, the better the electric drive box's performance, the higher its manufacturing cost. Even with a large number of market orders, high costs can still lead to losses for electric drive box manufacturers, hindering their development.

[0003] For electric drive box manufacturers, performance and cost maintain a certain positive correlation, so they need to design electric drive boxes with corresponding performance for different electric vehicles with different cost budgets to maximize profits. The industry generally uses transmission error to evaluate the performance of an electric drive box, but the client usually only provides a noise limit for the electric drive box as a production requirement. This requires staff to calculate the target transmission error corresponding to the user-provided noise value conditions and then design the internal mechanical structure of the engine based on the target transmission error. However, the noise value generated by the electric drive box is difficult to directly correspond to the transmission error of the electric drive box, so the design process is often very time-consuming. Summary of the Invention

[0004] The main purpose of this application is to provide a transmission error design method, device, equipment, storage medium and computer program product, aiming to solve the technical problem of how to directly design the electric drive box transmission error with the lowest production cost and that can meet customer needs based on the noise requirements proposed by the customer.

[0005] To achieve the above objectives, the present application provides a transmission error design method, the steps of the transmission error design method comprising:

[0006] By performing a performance test on the electric drive box, the real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern are obtained, and the corresponding real-time transmission errors are calculated at the same time;

[0007] constructing a linear correlation function of each transmission error based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transmission errors, and each of the real-time noise values;

[0008] Based on the linear correlation functions of the transmission errors, the target transmission error required by the user is determined by setting a target noise value corresponding to the requirements at a target vehicle speed.

[0009] In one embodiment, the step of constructing each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values ​​includes:

[0010] Based on the preset electric drive torques, a plurality of sets of real-time electric drive speeds and real-time noise values ​​corresponding to the preset electric drive torques are screened out, and discrete filtering is performed on the screened real-time electric drive speeds and real-time noise values;

[0011] Based on each group of the real-time electric drive speeds and the real-time noise values ​​after the discrete filtering process, a least squares method is used to draw corresponding speed-noise correlation curves under each preset electric drive torque;

[0012] Based on the speed-noise correlation curves, the real-time noise values ​​corresponding to the preset electric drive torques corresponding to the groups of real-time electric drive speeds at the same real-time electric drive speed are sequentially screened out;

[0013] A linear fitting is performed on each of the real-time noise values ​​and each of the real-time transmission errors in each of the screened groups to construct a linear correlation function of each of the transmission errors.

[0014] In one embodiment, the step of performing a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculating corresponding real-time transmission errors includes:

[0015] Detecting a current performance test environment, and performing a performance test on the electric drive box when the performance test environment is a preset silencing environment;

[0016] When performing a performance test on the electric drive box, based on each of the preset electric drive torques, the corresponding real-time electric drive speeds and real-time noise values ​​are collected respectively by the nine-point averaging method, and the corresponding real-time transmission errors are calculated at the same time.

[0017] In one embodiment, before the step of detecting the current performance test environment and, when performing the performance test on the electric drive box, collecting the corresponding real-time electric drive speeds and the corresponding real-time noise values ​​by a nine-point averaging method based on the preset electric drive torques and simultaneously calculating the corresponding real-time transmission errors, the method further includes:

[0018] When performing a performance test on the electric drive box, obtaining the maximum electric drive torque of the electric drive box;

[0019] The maximum electric drive torque is divided according to a preset gradient set by a user to obtain the preset electric drive torques in a linear pattern.

[0020] In one embodiment, the step of determining the target transfer error required by the user based on the transfer error linear correlation functions and the target noise value corresponding to the requirement at the target vehicle speed set by the user includes:

[0021] Based on the target vehicle speed, a target electric drive speed and a target electric drive torque corresponding to the electric drive box are calculated;

[0022] The target transmission error is determined based on the target electric drive speed and the transmission error linear correlation function corresponding to the target electric drive torque and by using the target noise value.

[0023] In one embodiment, after determining the target transfer error required by the user based on the transfer error linear correlation functions and by setting a target noise level corresponding to the user's requirements at the target vehicle speed, the method further includes:

[0024] When the target transmission error is lower than the standard transmission error threshold corresponding to the electric drive box, the gear parameters corresponding to the required gears that need to be replaced in the electric drive box are determined based on the target transmission error, so that after the user replaces the gear according to the gear parameters, the standard transmission error threshold of the electric drive box is reduced to below the target transmission error.

[0025] In addition, to achieve the above-mentioned purpose, the present application also provides a transmission error design device, which includes:

[0026] a test data acquisition module, configured to perform a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to a plurality of preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculate corresponding real-time transmission errors;

[0027] a linear function construction module, configured to construct each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values;

[0028] The transfer error acquisition module is used to determine the target transfer error required by the user based on the transfer error linear correlation functions and the target noise value corresponding to the requirements at the target vehicle speed set by the user.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides a transmission error design device, which includes: a memory, a processor, and a transmission error design program stored on the memory and executable on the processor, wherein the transmission error design program is configured to implement the steps of the transmission error design method described above.

[0030] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer-readable storage medium, and a transmission error design program is stored on the computer-readable storage medium. When the transmission error design program is executed by the processor, the steps of the transmission error design method described above are implemented.

[0031] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is processed by a processor, the steps of the transmission error design method described above are implemented.

[0032] The present application provides a transmission error design method, apparatus, device, storage medium and computer program product. The steps of the transmission error design method include: performing performance testing on an electric drive box to obtain the real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds in a linear pattern, and simultaneously calculating the corresponding real-time transmission errors; constructing linear correlation functions of each transmission error based on each of the preset electric drive torques, each real-time electric drive speed, each real-time transmission error and each real-time noise value; and determining the target transmission error required by the user based on the target noise value corresponding to the requirements set by the user at the target vehicle speed based on each of the transfer error linear correlation functions. By performing a performance test on the electric drive box, the electric drive box is made to work in sequence under multiple test conditions of preset electric drive torques in a linear pattern at different real-time electric drive speeds, and the noise generated by the electric drive box under each test condition is collected. At the same time, the transmission error of the electric drive box during the performance test is calculated and obtained. The transmission error linear correlation function used to represent the linear relationship between noise and transmission error is constructed through the above four variables. Based on the transmission error linear correlation function, the maximum allowable target transmission error that this type of electric drive box should have can be designed by using the maximum allowable target noise value generated by the electric drive box at a specific vehicle speed provided by the customer. In this way, the noise value required by the customer can be directly substituted into the transmission error linear correlation function constructed by performing a performance test on a certain type of electric drive box, and the corresponding target transmission error can be directly obtained, which helps the staff to meet the customer requirements at the lowest cost when designing the transmission error, greatly reducing the design workload, increasing production profits, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A flow chart illustrating the first embodiment of the transmission error design method of the present application;

[0036] Figure 2 A flow chart illustrating a second embodiment of the transfer error design method of the present application;

[0037] Figure 3 A flow chart illustrating the third embodiment of the transmission error design method of the present application;

[0038] Figure 4 This is a schematic diagram of the module structure of the transmission error design device according to an embodiment of the present application;

[0039] Figure 5 This is a schematic diagram of the structure of the error transmission design device according to an embodiment of the present application.

[0040] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0042] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0043] The main solution of this application is: by performing a performance test on the electric drive box, obtaining multiple electric drive torques and different electric drive speed conditions that are set in a linear pattern during the performance test, collecting the real-time noise value generated by the electric drive box under each condition and calculating the transmission error of the electric drive box under each condition. The transmission error linear correlation function is constructed using the above four variables to represent the linear relationship between noise and transmission error, and the customer's requirements for the maximum allowable target noise value generated by the electric drive box at different vehicle speeds are directly substituted into the transmission error linear correlation function to directly obtain the target transmission error with the lowest manufacturing cost and that can meet customer requirements.

[0044] Currently, transmission error is a key metric used to evaluate electric drive box performance. The smaller the transmission error, the better the performance, but the higher the manufacturing cost. For electric drive box manufacturers, some vehicles with low transmission error requirements don't actually require a high transmission error. To save costs, they can design the internal structure of the electric drive box using the lowest-cost components possible, ensuring they meet customer requirements at the lowest cost. However, for manufacturers, the performance metric they use for electric drive boxes is transmission error, and customer requirements for electric drive boxes are often based on the noise level generated during operation. This requires staff to convert customer noise requirements into transmission error within the factory before designing accordingly. However, transmission error and noise are not simply proportional, and designers cannot directly design the maximum target transmission error for an electric drive box based on customer noise requirements. Numerous steps, considering other factors, are required to ultimately design an electric drive box that meets customer needs, requiring significant time and effort. Therefore, how to directly design an electric drive box with the lowest production cost and the best possible transmission error based on customer noise requirements is a pressing issue.

[0045] The present application performs a performance test on the electric drive box, causing the electric drive box to work in sequence under multiple test conditions of preset electric drive torques in a linear pattern at different real-time electric drive speeds, and collects the noise generated by the electric drive box under each test condition. At the same time, the transmission error of the electric drive box during the performance test is calculated and obtained. The transmission error linear correlation function used to represent the linear relationship between noise and transmission error is constructed through the above four variables. Based on the transmission error linear correlation function, the maximum allowable target transmission error that this type of electric drive box should have can be designed by using the maximum allowable target noise value generated by the electric drive box at a specific vehicle speed provided by the customer. In this way, the noise value required by the customer can be directly substituted into the transmission error linear correlation function constructed by performance testing a certain type of electric drive box, and the corresponding target transmission error can be directly obtained, which helps the staff to meet customer requirements at the lowest cost when designing the transmission error, greatly reducing the design workload, increasing production profits, and improving work efficiency.

[0046] It should be noted that the execution subject of this embodiment may be a transmission error design device, or a transmission error design device with data processing, network communication, and program execution functions, etc., and this embodiment does not specifically limit this. The following describes this embodiment and the following embodiments using the transmission error design device as the execution subject.

[0047] Based on this, this application proposes a first embodiment of the transmission error design method, please refer to Figure 1 , the transmission error design method includes steps S10-S30:

[0048] Step S10, by performing a performance test on the electric drive box, obtaining real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculating corresponding real-time transmission errors;

[0049] It should be noted that the performance test is a functional test, which can specifically control the electric drive box to operate at different electric drive speeds and different electric drive torques to simulate the vehicle driving under different conditions. During the performance test, various working indicators of the electric drive box can be measured, including the noise value generated by the electric drive box and the transmission error of the electric drive box, etc., to evaluate the working efficiency and working performance of the electric drive box.

[0050] Among them, the electric drive speed refers to the output shaft speed of the motor in the electric drive box, and the current simulated vehicle speed can be calculated by the electric drive speed; the electric drive torque refers to the rotational torque generated by the motor in the electric drive box under corresponding working conditions; the transmission error refers to the difference between the actual angular displacement (torque angle) or angular velocity (speed) of the rotating structure such as the gear in the electric drive box and the theoretical value. For example, if the electric drive torque output by the electric drive box fluctuates greatly, it may cause the transmission error to increase, but the transmission error and the electric drive speed and electric drive torque are not a simple one-to-one correspondence; the noise value includes the electromagnetic noise generated by the electric drive in the working state of the electric drive box, the mechanical noise caused by friction, collision, resonance and other reasons of the mechanical structure composed of various components inside the electric drive box, and the aerodynamic noise generated by the cooling fan of the motor, etc., which are descriptive quantities of the corresponding noise intensity, and the unit is usually measured in decibels dB.

[0051] It is easy to understand that in this embodiment, when the performance test of the electric drive box is performed, the two variables of the electric drive torque and the electric drive speed can be controlled by the control variable method. First, a specific preset electric drive torque is maintained, and the real-time electric drive speed of the electric drive box is gradually changed. Under the condition of the preset electric drive torque, the real-time noise value generated by the electric drive box at each real-time electric drive speed is collected. At the same time, a high-precision angular displacement sensor and a speed sensor can be used to measure various data such as the angular displacement or angular velocity of key rotating components (such as gears or shafts) in the electric drive box by conventional methods, and then the real-time transmission error at the corresponding moment is calculated based on the measured data. Subsequently, the control amount of the preset electric drive torque is adjusted, and the real-time electric drive speed of the electric drive box is gradually changed again. The above method is repeated, so that multiple sets of real-time noise values ​​generated by the electric drive box at corresponding moments under different preset electric drive torques and different real-time electric drive speeds can be obtained, as well as the real-time transmission error corresponding to the electric drive box at the corresponding moment.

[0052] It is worth noting that in this embodiment, each preset electric drive torque presents a linear law and can be regarded as an arithmetic progression. For example, the maximum preset electric drive torque is set to Tmax, and the minimum preset electric drive torque is set to Tmin. Then, the remaining preset electric drive torques will take values ​​uniformly within the interval (Tmin, Tmax), that is, a specific difference △T can be continuously accumulated through the minimum preset electric drive torque Tmin to obtain each preset electric drive torque.

[0053] Step S20, constructing each transmission error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transmission errors, and each of the real-time noise values;

[0054] It should be noted that in this embodiment, the corresponding distribution relationship between each real-time electric drive speed, each real-time electric drive torque, each real-time transmission error and each real-time noise value obtained in the above manner can be grouped according to the preset electric drive torque and real-time electric drive speed for the convenience of calculation, so as to obtain a corresponding relationship diagram between the real-time noise value and the real-time transmission error in each group. Linear fitting can be performed on specific values ​​in each corresponding relationship diagram to construct a correlation function for representing the relationship between the real-time noise value and the real-time transmission error.

[0055] It is worth noting that, in this embodiment, since the value of the preset electric drive torque is linear, the finally obtained correlation function can be fitted into a linear function, that is, the finally obtained multiple transmission error linear correlation functions.

[0056] Step S30 : Based on the linear correlation functions of the transmission errors, the target transmission error required by the user is determined by setting a target noise value corresponding to the requirements at the target vehicle speed.

[0057] It should be noted that the target noise level is the maximum noise level permitted for the electric drive box under specific operating conditions as required by the customer. The user is the design staff who obtain the customer's requirements from the customer, specifically the maximum permissible target noise level permitted for the electric drive box under specific driving speeds.

[0058] It's easy to understand that the vehicle's speed can be broken down into the electric drive speed and torque of the electric drive box. In this embodiment, based on user settings, the control variables for the corresponding target vehicle speed and target noise level can be obtained. Substituting these into multiple pre-established linear correlation functions for transmission errors directly yields the target transmission error that meets the customer's needs while minimizing manufacturing costs.

[0059] The present application provides a transmission error design method, the steps of which include: performing performance testing on an electric drive box to obtain the real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds in a linear pattern, and simultaneously calculating the corresponding real-time transmission errors; constructing linear correlation functions of each transmission error based on each of the preset electric drive torques, each real-time electric drive speed, each real-time transmission error and each real-time noise value; and determining the target transmission error required by the user based on the target noise value corresponding to the requirements set by the user at the target vehicle speed based on each of the transfer error linear correlation functions. By performing a performance test on the electric drive box, the electric drive box is made to work in sequence under multiple test conditions of preset electric drive torques in a linear pattern at different real-time electric drive speeds, and the noise generated by the electric drive box under each test condition is collected. At the same time, the transmission error of the electric drive box during the performance test is calculated and obtained. The transmission error linear correlation function used to represent the linear relationship between noise and transmission error is constructed through the above four variables. Based on the transmission error linear correlation function, the maximum allowable target transmission error that this type of electric drive box should have can be designed by using the maximum allowable target noise value generated by the electric drive box at a specific vehicle speed provided by the customer. In this way, the noise value required by the customer can be directly substituted into the transmission error linear correlation function constructed by performing a performance test on a certain type of electric drive box, and the corresponding target transmission error can be directly obtained, which helps the staff to meet the customer requirements at the lowest cost when designing the transmission error, greatly reducing the design workload, increasing production profits, and improving work efficiency.

[0060] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 2 The step of constructing each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values ​​includes:

[0061] Step S21: Based on the preset electric drive torques, a plurality of sets of real-time electric drive speeds and real-time noise values ​​corresponding to the preset electric drive torques are screened out, and discrete filtering is performed on the screened real-time electric drive speeds and real-time noise values.

[0062] It should be noted that in this embodiment, the four variables can be decomposed to reduce the amount of computation. In a specific implementation, the variables are first grouped according to the preset electric drive torque. The real-time electric drive speeds, real-time noise values, and real-time transmission errors within each group of preset electric drive torques can be obtained. Because the real-time electric drive speeds and real-time noise values ​​are discrete values ​​collected by sensors, some of them may have erroneous samples with large deviations. Therefore, after grouping, these values ​​require discrete filtering to remove these samples with large deviations. The transmission errors, on the other hand, are discrete values ​​obtained through calculation and are highly accurate, so they do not require processing.

[0063] Step S22, based on each group of the real-time electric drive speeds and the real-time noise values ​​after the discrete filtering process, plotting speed-noise correlation curves corresponding to each preset electric drive torque using a least squares method;

[0064] It should be noted that in this embodiment, the real-time electric drive speed and real-time noise value in each set of real-time electric drive torques after discrete filtering can be plotted on a two-dimensional plane, and a corresponding smooth curve representing the relative relationship between the real-time electric drive speed and the real-time noise value, i.e., a speed-noise correlation curve, can be obtained using the least squares method. Since there are multiple preset electric drive torques, there should also be multiple speed-noise correlation curves.

[0065] Step S23, based on the speed-noise correlation curves, sequentially screening out the real-time noise values ​​corresponding to the preset electric drive torques corresponding to the real-time electric drive speeds of the groups at the same real-time electric drive speed;

[0066] It is easy to understand that in this embodiment, further grouping can be performed, with the real-time electric drive speed value remaining unchanged, to filter out multiple real-time noise values ​​corresponding to the same real-time electric drive speed and different preset electric drive torques in each speed-noise correlation curve. Within this grouping, the number of groups is the same as the number of preset electric drive torques, and the data contained in each group is the same as the number of real-time electric drive speeds.

[0067] In step S24 , a linear fitting is performed on each of the real-time noise values ​​and the real-time transmission errors in each of the screened groups to construct a linear correlation function of each transmission error.

[0068] It is easy to understand that based on the real-time noise values ​​corresponding to the same real-time electric drive speed and different preset electric drive torques obtained by the second grouping mentioned above, the corresponding relationship between the preset electric drive torque and the real-time noise value can be obtained, and then each preset electric drive torque is replaced with its corresponding real-time transmission error in turn, and multiple transmission error linear correlation functions for representing the relative relationship between the real-time noise value and the transmission error under the conditions of each preset electric drive torque and each real-time electric drive speed can be established.

[0069] Furthermore, in this embodiment, the step of performing a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculating corresponding real-time transmission errors includes:

[0070] Step S11, detecting the current performance test environment, and performing a performance test on the electric drive box when the performance test environment is a preset silencing environment;

[0071] It should be noted that the performance test environment refers to the current environment in which the electric drive box is located when performance testing is required. The preset anechoic environment refers to a test environment with other specific conditions, such as the ambient temperature being the standard test temperature, the ambient humidity being the standard test relative humidity, and the ambient noise being at least 10dB below the measured sound pressure level. The standard test temperature can be approximately 25°C, and the standard test relative humidity can be approximately 30%.

[0072] It is easy to understand that in this embodiment, before the performance test of the electric drive box is performed, the current performance test environment can also be detected by multiple high-precision sensors such as temperature sensors, humidity sensors, and sound sensors. If the preset anechoic environment standard is met, the performance test of the electric drive box is started.

[0073] Step S12, when performing a performance test on the electric drive box, based on each of the preset electric drive torques, the corresponding real-time electric drive speeds and the real-time noise values ​​are collected respectively by a nine-point averaging method, and the corresponding real-time transmission errors are calculated at the same time.

[0074] It is easy to understand that in a specific implementation, if the current performance test environment meets the preset silencing environment and the performance test of the electric drive box is started, the electric drive torque of the electric drive box is set according to each preset electric drive torque, and during the time when the electric drive torque of the electric drive box is at each preset electric drive torque, the electric drive speed of the electric drive box is changed in sequence, and the real-time electric drive speed of the electric drive box and the real-time noise value generated by the electric drive box are collected in real time through some high-precision sensors. At the same time, data such as the gear working parameters in the electric drive box can also be collected through another part of the high-precision sensors to calculate the real-time transmission error at the corresponding moment.

[0075] It is worth noting that in this implementation, in order to make the change trend of the collected real-time electric drive speed, real-time noise value and other measurement data more obvious, real and effective, it is convenient for subsequent grouping and drawing.

[0076] Furthermore, in this embodiment, before the step of detecting the current performance test environment and, when performing the performance test on the electric drive box, respectively collecting the corresponding real-time electric drive speeds and the corresponding real-time noise values ​​by a nine-point averaging method based on the preset electric drive torques and simultaneously calculating the corresponding real-time transmission errors, the method further includes:

[0077] Step S1201, when performing a performance test on the electric drive box, obtaining the maximum electric drive torque of the electric drive box;

[0078] Step S1202 : dividing the maximum electric drive torque according to a preset gradient set by a user to obtain the preset electric drive torques that are linear.

[0079] It is easy to understand that the initial torque of the electric drive box during the performance test is 0. In this embodiment, the real-time torque of the electric drive box can be collected to the value corresponding to the maximum electric drive torque, that is, the maximum electric drive torque. With the initial torque 0 as the lower limit and the maximum electric drive torque as the upper limit, the interval is divided into several preset electric drive torques according to the preset gradient. For example, if the maximum electric drive torque is Tmax and the preset gradient is △T, the interval (0, Tmax) can be divided into n+1 preset electric drive torques that change linearly according to the preset gradient △T.

[0080] Based on the first embodiment and / or the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first and second embodiments above can be referred to the above introduction and will not be described in detail later. Figure 3 The step of determining the target transfer error required by the user based on the linear correlation function of each transfer error and the target noise value corresponding to the requirement at the target vehicle speed set by the user comprises:

[0081] Step S31, based on the target vehicle speed, calculating and obtaining a target electric drive speed and a target electric drive torque corresponding to the electric drive box;

[0082] It should be noted that the target vehicle speed is the average vehicle speed maintained during normal driving as limited by the customer. Since the vehicle speed is related to the drive wheel speed, and the drive wheel speed is related to the electric drive speed and electric drive torque of the electric drive box, the target vehicle speed is calculated according to the working characteristics of the current type of electric drive box to obtain the target electric drive speed and target electric drive torque corresponding to the target vehicle speed.

[0083] Step S32 : determining the target transmission error based on the target electric drive speed and the transmission error linear correlation function corresponding to the target electric drive torque and the target noise value.

[0084] It is easy to understand that the target noise value is also provided by the customer. The target noise value provided by the customer can be directly substituted into the pre-built transmission error linear correlation function to directly calculate the target transmission error corresponding to the target noise value.

[0085] It is worth noting that in this embodiment, the target transmission error obtained may differ from the actual transmission error ultimately selected for the electric drive box design. In practice, the actual transmission error may be equal to or less than the target transmission error. However, since noise levels and transmission error generally vary inversely, to minimize costs, the actual transmission error is generally equal to the target transmission error obtained.

[0086] Furthermore, in this embodiment, after the step of determining the target transfer error required by the user based on the transfer error linear correlation functions and the target noise value corresponding to the requirements at the target vehicle speed set by the user, the method further includes:

[0087] In step S40, when the target transmission error is lower than the standard transmission error threshold corresponding to the electric drive box, the gear parameters corresponding to the required gears that need to be replaced in the electric drive box are determined based on the target transmission error, so that after the user replaces the gear according to the gear parameters, the standard transmission error threshold of the electric drive box is reduced to below the target transmission error.

[0088] It is easy to understand that the standard transmission error threshold refers to the maximum value of the transmission error corresponding to the working characteristics of this type of electric drive box itself, and is related to the parameters of the various components inside the electric drive box (such as gear parameters). If the target transmission error required by the customer is calculated to be lower than the standard transmission error threshold, it means that the various components in the currently selected electric drive box cannot meet the customer's needs. At this time, the target transmission error can be used to calculate the gear that needs to be replaced in the current electric drive box and the gear parameters that the gear should have, thereby assisting the user in selecting a gear with the corresponding gear parameters for replacement, and ultimately making the standard transmission error threshold of the electric drive box equal to or lower than the maximum allowable target transmission error required by the user.

[0089] The present application also provides a transmission error design device, please refer to Figure 4 , the transmission error design device includes:

[0090] The test data acquisition module 10 is configured to perform a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds in a linear pattern, and simultaneously calculate corresponding real-time transmission errors;

[0091] a linear function construction module 20 for constructing each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values;

[0092] The transfer error acquisition module 30 is configured to determine a target transfer error required by the user based on the transfer error linear correlation functions and a target noise value corresponding to a requirement at a target vehicle speed set by the user.

[0093] The transmission error design device provided in the embodiments of this application, utilizing the transmission error design method described in the aforementioned embodiments, can address the technical problem of designing an electric drive box transmission error that meets customer noise requirements while minimizing production costs. Compared to the prior art, the transmission error design device provided in the embodiments of this application achieves the same beneficial effects as the transmission error design method described in the aforementioned embodiments. Other technical features of the transmission error design device are the same as those disclosed in the aforementioned embodiments and are not further elaborated here.

[0094] The present application provides a transmission error design device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the transmission error design method in the above-mentioned embodiment one.

[0095] Reference below Figure 5 , which shows a schematic diagram of the structure of a transmission error design device suitable for implementing the embodiment of the present application. The transmission error design device in the embodiment of the present application may include but is not limited to a fixed terminal such as a vehicle-mounted terminal. Figure 5 The transmission error design device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0096] like Figure 5As shown, the transmission error design device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the transmission error design device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003 including, for example, a magnetic tape, hard disk, etc.; and communication device 1009. The communication device 1009 can allow the transmission error design device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a transmission error design device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0097] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0098] The transmission error design device provided in this application, utilizing the transmission error design method described in the aforementioned embodiment, can address the technical problem of designing an electric drive box transmission error that meets customer noise requirements while minimizing production costs. Compared to the prior art, the transmission error design device provided in this application achieves the same beneficial effects as the transmission error design method described in the aforementioned embodiment. Other technical features of this device are the same as those disclosed in the aforementioned embodiment and are not further elaborated here.

[0099] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0100] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0101] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, a computer program) stored thereon, wherein the computer-readable program instructions are used to execute the transmission error design method in the above embodiment.

[0102] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0103] The computer-readable storage medium may be included in the transmission error design device, or may exist independently without being assembled into the transmission error design device.

[0104] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the transmission error design device, the transmission error design device: performs performance testing on the electric drive box to obtain the real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds in a linear pattern, and simultaneously calculates the corresponding real-time transmission errors; constructs linear correlation functions of each transmission error based on each preset electric drive torque, each real-time electric drive speed, each real-time transmission error and each real-time noise value; and determines the target transmission error required by the user based on the target noise value corresponding to the requirement set by the user at the target vehicle speed based on each transmission error linear correlation function.

[0105] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0106] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0107] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0108] The computer-readable storage medium provided herein stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned transmission error design method. This computer-readable storage medium addresses the technical problem of designing an electric drive box transmission error that meets customer noise requirements while minimizing production costs. Compared to the prior art, the computer-readable storage medium provided herein offers the same beneficial effects as the transmission error design method provided in the aforementioned embodiments, and will not be further elaborated upon here.

[0109] The present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the above-mentioned transmission error design method are implemented.

[0110] The computer program product provided in this application solves the technical problem of designing a transmission error control system for an electric drive box that meets customer noise requirements while minimizing production costs. Compared to existing technologies, the computer program product provided in this application offers the same beneficial effects as the transmission error design method provided in the aforementioned embodiments, and will not be further elaborated here.

[0111] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent processing scope of the present application.

Claims

1. A transmission error design method, characterized in that: The steps of the transmission error design method include: By performing a performance test on the electric drive box, the real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern are obtained, and the corresponding real-time transmission errors are calculated at the same time; constructing a linear correlation function of each transmission error based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transmission errors, and each of the real-time noise values; Based on the linear correlation functions of the transmission errors, the target transmission error required by the user is determined by setting a target noise value corresponding to the requirements at a target vehicle speed.

2. The transmission error design method according to claim 1, wherein: The step of constructing each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values ​​comprises: Based on the preset electric drive torques, a plurality of sets of real-time electric drive speeds and real-time noise values ​​corresponding to the preset electric drive torques are screened out, and discrete filtering is performed on the screened real-time electric drive speeds and real-time noise values; Based on each group of the real-time electric drive speeds and the real-time noise values ​​after the discrete filtering process, a least squares method is used to draw corresponding speed-noise correlation curves under each preset electric drive torque; Based on the speed-noise correlation curves, the real-time noise values ​​corresponding to the preset electric drive torques corresponding to the groups of real-time electric drive speeds at the same real-time electric drive speed are sequentially screened out; A linear fitting is performed on each of the real-time noise values ​​and each of the real-time transmission errors in each of the screened groups to construct a linear correlation function of each of the transmission errors.

3. The transmission error design method according to claim 1, wherein: The step of performing a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to multiple preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculating corresponding real-time transmission errors includes: Detecting a current performance test environment, and performing a performance test on the electric drive box when the performance test environment is a preset silencing environment; When performing a performance test on the electric drive box, based on each of the preset electric drive torques, the corresponding real-time electric drive speeds and real-time noise values ​​are collected respectively by the nine-point averaging method, and the corresponding real-time transmission errors are calculated at the same time.

4. The transmission error design method according to claim 3, wherein: Before the step of detecting the current performance test environment and, when performing the performance test on the electric drive box, collecting the corresponding real-time electric drive speeds and the corresponding real-time noise values ​​by a nine-point averaging method based on the preset electric drive torques and calculating the corresponding real-time transmission errors, the method further includes: When performing a performance test on the electric drive box, obtaining the maximum electric drive torque of the electric drive box; The maximum electric drive torque is divided according to a preset gradient set by a user to obtain the preset electric drive torques in a linear pattern.

5. The transmission error design method according to claim 1, wherein: The step of determining the target transfer error required by the user based on the transfer error linear correlation function and the target noise value corresponding to the requirement at the target vehicle speed set by the user comprises: Based on the target vehicle speed, a target electric drive speed and a target electric drive torque corresponding to the electric drive box are calculated; The target transmission error is determined based on the target electric drive speed and the transmission error linear correlation function corresponding to the target electric drive torque and by using the target noise value.

6. The transmission error design method according to claim 1, wherein: After determining the target transfer error required by the user based on the transfer error linear correlation functions and by setting a target noise value corresponding to the requirements at the target vehicle speed by the user, the method further includes: When the target transmission error is lower than the standard transmission error threshold corresponding to the electric drive box, the gear parameters corresponding to the required gears that need to be replaced in the electric drive box are determined based on the target transmission error, so that after the user replaces the gear according to the gear parameters, the standard transmission error threshold of the electric drive box is reduced to below the target transmission error.

7. A transmission error design device, characterized in that: The transmission error design device comprises: a test data acquisition module, configured to perform a performance test on the electric drive box to obtain real-time noise values ​​generated by the electric drive box corresponding to a plurality of preset electric drive torques and different real-time electric drive speeds of the electric drive box in a linear pattern, and simultaneously calculate corresponding real-time transmission errors; a linear function construction module, configured to construct each transfer error linear correlation function based on each of the preset electric drive torques, each of the real-time electric drive speeds, each of the real-time transfer errors, and each of the real-time noise values; The transfer error acquisition module is used to determine the target transfer error required by the user based on the transfer error linear correlation functions and the target noise value corresponding to the requirements at the target vehicle speed set by the user.

8. A transmission error design device, characterized in that: The transmission error design device includes: a memory, a processor, and a transmission error design program stored in the memory and executable on the processor, wherein the transmission error design program is configured to implement the steps of the transmission error design method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a transmission error design program is stored on the computer-readable storage medium. When the transmission error design program is executed by a processor, the steps of the transmission error design method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the transmission error design method according to any one of claims 1 to 6 are implemented.

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