Start-stop control method, device and equipment for dual-motor vehicle-mounted screen and storage medium

Abstract

The invention discloses a start-stop control method and device for a dual-motor vehicle-mounted screen, equipment and a storage medium, and relates to the technical field of intelligent cabins, and the method comprises the steps: obtaining tooth space data at the current moment in response to a vehicle-mounted screen overturning instruction; generating bilateral soft contact control parameters according to the inter-tooth gap data; and according to the parameters, the driving motor is controlled to perform inter-tooth soft contact in the running direction, so that synchronous mute starting of the motors on the two sides is realized. According to the technical scheme, gear meshing impact noise is effectively reduced through a dynamic clearance compensation mechanism, abnormal sound elimination in the starting stage is achieved by reducing and even eliminating instantaneous impact force, in addition, through a double-motor synchronous control mechanism, driving logic of motors on the two sides is accurately matched, noise superposition is restrained, the driving comfort is remarkably improved, and the driving safety is improved. And the method is suitable for scenes with high requirements on mute performance and reliability of high-end vehicle models, and has remarkable industrial popularization value.

Description

Technical Field

[0001] The present application relates to the field of smart cockpit technology, and in particular to a start / stop control method, device, equipment and storage medium for a dual-motor vehicle-mounted screen. Background Art

[0002] In the rapid development of the contemporary automobile industry, as the core medium for human-vehicle interaction, the optimization and upgrading of the functions and performance of in-vehicle screens have always been the focus of the industry. As consumers' driving experience continues to improve, in-vehicle screens must not only have basic functions such as high-definition display and touch control, but also achieve silent, stable and precise control during operation to create a high-quality driving environment.

[0003] While meeting the needs of driving safety and information acquisition, the in-car entertainment experience has also become an important factor in improving driving satisfaction, especially for rear passengers. The ceiling screen, as an extension and supplement to the car screen, provides them with exclusive audio-visual enjoyment. The ceiling screen is installed inside the roof, facing the rear passengers. The motor drive system of the ceiling screen is usually a dual-motor drive system, which is widely used because of its higher torque output capacity, more complex control strategy to achieve more flexible motion control, and stronger stability. However, during the start-stop process, the dual-motor driven car screen is prone to inter-tooth impact noise due to insufficient motor control accuracy and untimely inter-tooth gap compensation, which affects driving comfort. On the other hand, the dual-motor control solution makes the startup noise exist on both sides of the motor at the same time. To eliminate the startup noise, it is necessary to ensure that the motors on both sides are started synchronously and silently, which further increases the technical difficulty of eliminating the noise during the startup phase.

[0004] Therefore, how to achieve synchronous silent starting of dual motors during the starting phase is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] The main purpose of this application is to provide a start-stop control method, device, equipment and storage medium for a dual-motor vehicle-mounted screen, aiming to solve the technical problem of how to achieve synchronous silent starting of dual motors during the startup phase in the prior art.

[0006] To achieve the above objectives, the present application proposes a start-stop control method for a dual-motor vehicle-mounted screen, the method comprising: In response to the on-board screen flipping instruction, obtaining the inter-tooth gap data at the current moment; generating bilateral soft contact control parameters according to the inter-tooth clearance data; According to the bilateral soft contact control parameters, the drive motor is controlled to perform inter-tooth soft contact along the running direction to complete synchronous silent starting of the motors on both sides.

[0007] In one embodiment, obtaining the inter-tooth clearance data at the current moment in response to the vehicle-mounted screen flipping instruction includes: In response to the vehicle-mounted screen flipping instruction, obtaining the driving wheel rotation angle and the driven wheel rotation angle of the vehicle-mounted screen at the current moment; Based on the driving wheel rotation angle and the driven wheel rotation angle, determining the inter-tooth meshing interval combination at the current moment; Based on the inter-tooth clearance mean value query table, obtaining the inter-tooth clearance data corresponding to the inter-tooth meshing interval combination.

[0008] In one embodiment, before obtaining the inter-tooth clearance data at the current moment in response to the vehicle-mounted screen flipping instruction, it further includes: Operating the drive motor according to a preset input current, and recording the motor torque data and the driven wheel speed data during the driving process, where the input current is a micro-amplitude bilateral symmetric triangular wave; Based on the motor torque record and the driven wheel speed data, determining the no-load travel delay singularity point; Based on the no-load travel delay singularity point and the driven wheel speed data within the preset no-load travel range at this point, determining the inter-tooth clearance sample data; Based on the inter-tooth clearance sample data and the inter-tooth meshing interval combination corresponding to the no-load travel delay singularity point, constructing an inter-tooth clearance mean value query table.

[0009] In one embodiment, determining the no-load travel delay singularity point based on the motor torque record and the driven wheel speed data includes: Based on the motor torque record and the drive motor input current waveform data, determining the driving wheel torque mutation time node; Based on the driven wheel speed data and the drive motor input current waveform data, determining the driven wheel speed mutation time node; Based on the driving wheel torque mutation time node and the driven wheel speed mutation time node, determining the no-load travel delay singularity point.

[0010] In one embodiment, constructing the inter-tooth clearance mean value query table based on the inter-tooth clearance sample data and the inter-tooth meshing interval combination corresponding to the no-load travel delay singularity point includes: Obtaining the driving wheel rotation angle and the driven wheel rotation angle corresponding to the no-load travel delay singularity point; Based on the driving wheel rotation angle, determining the driving wheel interval, and based on the driven wheel rotation angle, determining the driven wheel interval; Based on the driving wheel interval and the driven wheel interval, determining the inter-tooth meshing interval combination; Based on the inter-tooth clearance sample data corresponding to the inter-tooth meshing interval combination, determining the inter-tooth clearance mean value; Construct a query table for the average tooth gap based on the average tooth gap value and the corresponding tooth meshing interval combination.

[0011] In one embodiment, the generating of the bilateral soft contact control parameters according to the tooth gap data includes: Obtain the corner compensation amount of the driving wheel according to the tooth gap data; According to the preset soft contact synchronization duration, the soft contact peak speed, and the corner compensation amounts of the two side driving wheels, obtain the speed-time control tables for the two side driving motors to achieve tooth synchronization soft contact respectively; According to the speed-time control table, obtain the differential control current, and use the differential control current as the bilateral soft contact control parameter.

[0012] In one embodiment, the obtaining of the speed-time control tables for the two side driving motors to achieve tooth synchronization soft contact according to the preset soft contact synchronization duration, the soft contact peak speed, and the corner compensation amounts of the two side driving wheels respectively includes: Determine the corner acceleration according to the corner compensation amount; Determine the acceleration stage control duration according to the corner acceleration and the soft contact peak speed; Determine the constant speed stage control duration according to the acceleration contact control duration and the preset soft contact synchronization duration; Obtain the speed-time control table according to the speed acceleration, the acceleration stage control duration, and the constant speed stage control duration.

[0013] In addition, to achieve the above object, the present application also proposes a start-stop control device for a dual-motor vehicle-mounted screen. The start-stop control device for the dual-motor vehicle-mounted screen includes: A data processing module, configured to obtain the tooth gap data at the current moment in response to a vehicle-mounted screen flipping instruction; The data processing module is further configured to generate bilateral soft contact control parameters according to the tooth gap data; A motor driving module, configured to control the driving motor to perform tooth soft contact along the running direction according to the bilateral soft contact control parameters, so as to complete the synchronous silent start of the two side motors.

[0014] In addition, to achieve the above object, the present application also proposes a start-stop control device for a dual-motor vehicle-mounted screen. The device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the start-stop control method for the dual-motor vehicle-mounted screen as described above.

[0015] In addition, to achieve the above object, the present application also provides a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the start-stop control method of the dual-motor vehicle-mounted screen described above are implemented.

[0016] The technical solution of the present application includes: in response to a vehicle-mounted screen flipping instruction, obtaining the tooth gap data at the current moment; generating bilateral soft contact control parameters according to the tooth gap data; and controlling the driving motor to perform soft contact between teeth along the running direction according to the parameters to achieve synchronous silent start of the two motors. This technical solution effectively reduces the gear meshing impact noise through a dynamic gap compensation mechanism, eliminates the abnormal noise in the start-up stage by reducing and even eliminating the instantaneous impact force. In addition, through the dual-motor synchronous control mechanism, the driving logics of the two motors are accurately matched to suppress noise superposition. This solution significantly improves the riding comfort, is applicable to scenarios with high requirements for quietness and reliability in high-end vehicles, and has significant industry promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic flowchart provided for Embodiment 1 of the start-stop control method of the dual-motor vehicle-mounted screen of the present application; Figure 2 It is a schematic curve diagram of the rotational speed-time control table provided for Embodiment 1 of the start-stop control method of the dual-motor vehicle-mounted screen of the present application; Figure 3 It is a schematic flowchart provided for Embodiment 2 of the start-stop control method of the dual-motor vehicle-mounted screen of the present application; Figure 4 It is a schematic module structure diagram of the start-stop control device of the dual-motor vehicle-mounted screen for the embodiments of the present application; Figure 5 It is a schematic device structure diagram of the hardware operating environment involved in the start-stop control method of the dual-motor vehicle-mounted screen for the embodiments of the present application.

[0020] The realization of the object, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0022] To better understand the technical solutions of the present application, the following will be described in detail in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0023] The main solution of the embodiments of the present application is: in response to a vehicle-mounted screen flipping instruction, obtain the tooth gap data at the current moment; generate bilateral soft contact control parameters according to the tooth gap data; and control the driving motor to perform soft contact between teeth along the running direction according to the parameters to achieve synchronous silent start of the two motors.

[0024] In current vehicle-mounted screens, especially in the dual-motor drive system of vehicle-mounted ceiling screens, due to the tooth gap problem in gear transmission and insufficient motor control accuracy, impact noise and out-of-sync phenomena are likely to occur during start-stop processes. Such problems not only affect the silent driving experience of passengers, but also reduce the service life of the device due to long-term mechanical impacts. Especially in the context of the increasingly stringent requirements for silence and reliability in high-end vehicles, there is an urgent need for a technical solution that can achieve synchronous silent start of dual motors to solve the defects of existing systems.

[0025] The present application provides a solution, aiming to solve the technical problem of synchronous silent start of dual motors in the start-up stage in the prior art.

[0026] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a start-stop control device of a dual-motor vehicle-mounted screen that can implement the above functions. The following takes the start-stop control device of a dual-motor vehicle-mounted screen as the execution subject as an example to illustrate this embodiment and the following embodiments.

[0027] Based on this, the embodiments of the present application provide a start-stop control method for a dual-motor vehicle-mounted screen, referring to Figure 1 , Figure 1 which is a schematic flowchart of the first embodiment of the start-stop control method for a dual-motor vehicle-mounted screen of the present application.

[0028] In this embodiment, the start-stop control method for a dual-motor vehicle-mounted screen includes steps S10 to S30: Step S10: In response to a vehicle-mounted screen flipping instruction, obtain the tooth gap data at the current moment.

[0029] It should be noted that the tooth clearance (also known as gear backlash, English: Backlash) is a professional term in the field of mechanical transmission to describe the clearance amount in the non-contact area between gear meshing pairs, and it belongs to the inherent property of the gear transmission system. Its technical definition is: when two meshing gears are stationary or running in reverse, the minimum axial or normal clearance distance generated due to the incomplete contact between the tooth surfaces of the driving gear and the driven gear. This clearance allows the existence of a lubricating oil film during the gear meshing transmission process, compensates for dimensional errors caused by machining tolerances, thermal expansion, or wear, and avoids jamming due to excessive tightness during gear meshing.

[0030] It can be understood that the tooth clearance is an inherent parameter in the gear system design and cannot be completely eliminated because its existence has a dual role. First, due to the fact that manufacturing errors cannot be completely eliminated, the tooth clearance can only be minimized as much as possible but cannot be completely avoided. On the other hand, the existence of the tooth clearance has certain positive effects: the tooth clearance can absorb thermal expansion deformation during operation, reduce the requirements for assembly accuracy, and provide a storage space for lubricants. On the other hand, the existence of the tooth clearance has certain negative effects: during the moment of switching the transmission direction or starting and stopping, the clearance will cause the driving gear to rotate idly briefly (unloaded movement), generating mechanical impact noise (such as "click" sound) and transmission delay, affecting the accuracy and smoothness of motion control.

[0031] It should be understood that the tooth clearance data changes with the actual rotation angles of the driving gear and the driven gear. When the gear meshes at different rotation angle positions, due to the different load changes and wear degrees of each tooth on the entire gear, the actual tooth clearance changes with the combination of meshing teeth, so the tooth clearance data changes with the combination of teeth between the two wheels on both sides.

[0032] In a feasible implementation manner, step S10 may include steps A11 to A13: Step A11: In response to the in-vehicle screen flipping instruction, obtain the rotation angles of the driving gear and the driven gear of the in-vehicle screen at the current moment.

[0033] It should be noted that the rotation angles of the driving gear and the driven gear here refer to the angles of the teeth meshing between the driving gear and the driven gear at the moment of receiving the flipping instruction (motor driving instruction) on their respective wheel disks, that is, the central angle coordinates of the tooth surface contact points on their own wheel disks, and their absolute positions need to be obtained through real-time measurement by an encoder and combined with the initial calibration of the gear phase mark.

[0034] It can be understood that both the driving gear and the driven gear are equipped with absolute encoders (such as multi-turn SSI encoders) to ensure that the absolute position can still be recorded after power-off.

[0035] It should be understood that since the on-vehicle screen in this embodiment is driven by two motors, the obtained driving wheel rotation angle and driven wheel rotation angle are two sets of data corresponding to the two motors on both sides respectively.

[0036] Step A12: Determine the tooth engagement interval combination at the current moment according to the driving wheel rotation angle and the driven wheel rotation angle.

[0037] It should be noted that in order to make the motor output torque meet the driving requirements in the product of this embodiment, a multi-stage reduction gearbox needs to be added between the motor output shaft and the ceiling screen rotating shaft to achieve the effect of reducing speed and increasing torque. However, this will make it difficult to calibrate the tooth clearance data corresponding to the tooth combinations at any angle and the amount of data is huge. Therefore, this embodiment adopts the technical idea of zoned averaging to reduce the amount of data and the processing amount in the tooth clearance data calibration process.

[0038] It can be understood that since the formation of tooth clearance results from the superposition of many independent random factors (such as machine tool vibration, material inhomogeneity, tool micro-wear), the clearance distribution of a single tooth tends to be normally distributed (central limit theorem). Under this premise, the high-frequency engagement sector (such as the gear working in a fixed angle interval for a long time) wears more severely, making the clearance increase significantly, resulting in the mean value of the clearance of the sector combination deviating from the overall mean value. Therefore, for different sectors of the same gear, the tooth clearance data within the same sector should be approximate. For example, assume that gear A is divided into multiple continuous sectors such as a, b, c... and gear B is divided into multiple continuous sectors such as α, β, γ... (such as evenly divided into 10 sectors, and the total number of teeth of the gear is 60, then each sector has 6 teeth). For any tooth in any sector and the standard tooth, the tooth clearance formed will show a normal distribution near the mean value. On this basis, it can be further determined that when any two sectors of gear A and gear B are engaged, the corresponding tooth clearance data will show an approximate normal distribution near the mean value of the tooth clearance, that is, the clearances of most teeth are close to the mean value, and a few deviate greatly. For example, when the teeth in sector b of gear A are engaged with the teeth in sector γ of gear B, instead of determining the specific clearance data between tooth and tooth, the mean value of the tooth clearance under the combination of these two sectors is used as the data basis for subsequent generation of control parameters.

[0039] Step A13: Based on the tooth clearance mean value lookup table, obtain the tooth clearance data corresponding to the tooth engagement interval combination.

[0040] It should be understood that since the total number of sectors between each gear is determined, and the total number of meshing sectors formed by the driving wheel and the driven wheel is also determined, therefore, in the process of calibrating the tooth clearance data, what is actually calibrated is the mapping table of the mean values of the clearances of all possible meshing sector combinations.

[0041] It can be understood that according to different calibration experiment ideas, different calibration methods can be adopted before leaving the factory for the clearance mean calibration method. For example, in the conventional random sampling method, several pairs of teeth (such as 3 pairs of teeth are extracted from each sector) are randomly selected from the teeth involved in the sector combination, the actual meshing clearance is measured, and then the mean value is calculated and filled in the form; another idea is dynamic meshing test. The specific operation is to drive the gear to rotate forward and backward by a small angle, record the rotation angle difference between the driving wheel and the driven wheel, and calculate the mean value of the invalid stroke angle corresponding to the clearance as the tooth clearance mean value under this interval combination.

[0042] Step S20: Generate bilateral soft contact control parameters according to the tooth clearance data.

[0043] It should be noted that in this embodiment, soft contact means that on the premise of determining the tooth clearance, the driving wheel is made to rotate in advance and reach the tooth contact point through specific motor control instructions, and the speed is reduced in advance and disabled before reaching the contact point, so as to ensure that the driving wheel and the driven wheel complete meshing in a state without impact. This soft contact method not only effectively reduces the noise generated by mechanical collision, but also significantly reduces the tooth impact force, thus realizing the silent start of the bilateral motor drive system.

[0044] It should be understood that since there are driving motors on both sides at the same time, it is necessary to ensure that the bilateral soft contact is completed synchronously to achieve the overall silent start effect. If the soft contact processes of the two motors are not synchronous, it may cause one motor to complete meshing in advance or lag, resulting in problems such as mechanical impact, increased noise, and unstable system operation.

[0045] In a feasible implementation manner, step S20 may include steps B11 to B13: Step B11: Obtain the rotation angle compensation amount of the driving wheel according to the tooth clearance data.

[0046] It can be understood that in this embodiment, the rotation angle compensation amount refers to the angle size that the driving wheel can rotate in advance to the contact point of the driven wheel. The specific calculation of the rotation angle compensation amount is directly related to gear design parameters such as the size of the tooth clearance, the module of the gear, the number of teeth, and the transmission ratio.

[0047] Step B12: According to the preset soft contact synchronization duration, soft contact peak speed, and the rotation angle compensation amounts of the two driving wheels on both sides, respectively obtain the speed-time control tables for the two driving motors to achieve tooth synchronization soft contact.

[0048] It should be noted that the preset soft contact synchronization duration refers to the duration preset by the control system for the soft contact to be completed synchronously on both sides. Since there must be a large and a small distance in the tooth gaps of the motors on both sides, corresponding drive control instructions are generated on the premise of anchoring the synchronization duration. The soft contact peak speed refers to the maximum speed that the drive motor is allowed to reach during the soft contact stage. At this speed, even if tooth gap collisions occur, it can ensure that smaller impacts and noises are generated.

[0049] As Figure 2 shown, Figure 2 This is a schematic curve diagram of the speed-time control table in the first embodiment of this application.

[0050] It can be understood that in the figure, there are respectively a control schematic diagram of the speed change with time for the side with a larger gap and a control schematic diagram of the speed change with time for the side with a smaller gap. Since the motors on both sides need to complete soft contact synchronously, during the process of the speed rising to the peak and then decreasing to zero, the physical meaning of the area formed by the speed axis and the time axis is the angular compensation amount of the corresponding drive motor. Since the speed changes first with uniform acceleration and then with uniform deceleration, this can ensure that when there is an error between the actual gap distance and the result of looking up the table, the force can be unloaded earlier, thereby reducing the tooth gap impact.

[0051] In a feasible implementation manner, step B12 may include: determining the angular acceleration according to the angular compensation amount; determining the acceleration stage control duration according to the angular acceleration and the soft contact peak speed; determining the constant speed stage control duration according to the acceleration contact control duration and the preset soft contact synchronization duration; and obtaining the speed-time control table according to the speed acceleration, the acceleration stage control duration, and the constant speed stage control duration.

[0052] It can be understood that for the case of a larger gap (the control curve presents a trapezoid), since the motor adopts the same acceleration data in the acceleration stage and the deceleration stage of the soft contact, therefore, on the premise of determining the peak speed, only the acceleration data and the duration of the acceleration stage / deceleration stage need to be deduced inversely according to the total angle amount, combined with the preset soft contact synchronization duration, to determine the speed magnitudes at each time point of the soft contact, and a complete speed-time control table is generated based on this. It should be noted that in the case of a larger gap, this curve is always not higher than the peak speed. Taking the upper coordinate axis in the figure as an example, this trapezoid adjusts the area enclosed by the entire curve and the horizontal coordinate axis by increasing the upper base (the duration of uniform rotation), and this area corresponds to the actual angular compensation amount.

[0053] It should be understood that for the case of a smaller gap (the control curve is triangular), due to the small gap, the acceleration process does not need to reach the peak speed. Under the premise that the required total angle and the overall duration are determined, the speed acceleration of the acceleration and deceleration stages can be simply calculated by the kinematic formula, and the corresponding speed-time control table can be further obtained. Taking the lower coordinate axis in the figure as an example, the triangle adjusts the area of ​​the horizontal axis enclosed by the entire curve (the actual angle compensation amount) by changing the height (the actual peak speed).

[0054] Step B13: Obtain a differential control current according to the speed-time control table, and use the differential control current as the bilateral soft contact control parameter.

[0055] It should be noted that since the speed is the control result that the drive motor needs to output, and the control current is the input command of the drive motor, it is necessary to combine the speed-time control table to reversely deduce the control current change curve during the soft contact process.

[0056] It is understandable that since the motors on both sides correspond to their own speed-time control tables, it is necessary to generate differentiated control current curves for each motor to ensure that the motors on both sides can run accurately and synchronously during the soft contact process. Specifically, although the speed-time control tables of the motors on both sides are based on the same soft contact target, due to differences in motor characteristics, different inter-tooth gap compensation amounts, and assembly errors, the control current size and change rate required for each motor will be slightly different.

[0057] Step S30: According to the bilateral soft contact control parameters, the drive motor is controlled to perform inter-tooth soft contact along the running direction to complete synchronous silent starting of the motors on both sides.

[0058] It can be understood that by inputting differential control current into the drive motor, the system can ensure that the motor operates strictly according to the preset speed-time curve during the startup process, thereby achieving impact-free engagement at the contact point between the teeth. Only after the engagement is completed will the subsequent control content related to the flipping instruction be executed. This pre-control mechanism not only improves the reliability of the system, but also effectively avoids the noise and vibration problems caused by motor asynchrony, and ultimately achieves silent starting of the dual-motor system.

[0059] This embodiment obtains the inter-tooth clearance data at the current moment by responding to the vehicle-mounted screen flipping instruction; generates bilateral soft contact control parameters based on the inter-tooth clearance data; and controls the drive motor to perform inter-tooth soft contact along the running direction based on the parameters to achieve synchronous silent starting of the motors on both sides.

[0060] In summary, through the dynamic clearance compensation mechanism, the technical solution effectively reduces the gear meshing impact noise. By reducing or even eliminating the instantaneous impact force, the abnormal noise in the starting stage is eliminated. In addition, through the dual-motor synchronous control mechanism, the driving logics of the two motors on both sides are precisely matched to suppress noise superposition. This solution significantly improves the ride comfort and is applicable to scenarios with high requirements for the quietness and reliability of high-end models, having significant industry promotion value.

[0061] Based on the first embodiment of this application, in the second embodiment of this application, for the same or similar content as in the above-mentioned first embodiment, reference can be made to the above introduction and will not be elaborated hereinafter. On this basis, please refer to Figure 3 , before step S10 in the start-stop control method of the dual-motor vehicle-mounted screen, steps S001 to S004 are further included: Step S001: Run the driving motor according to a preset input current, and record the motor torque data and the driven wheel speed data during the driving process.

[0062] It should be noted that the purpose of this embodiment is to input a specific control current and record the changes in relevant data such as the rotation angle, speed, torque, and current of the driving wheel and the driven wheel during the driving process, and use this as a data basis to invert the tooth clearance data.

[0063] It can be understood that the input current for the calibration test is a micro-amplitude bilateral symmetric triangular wave. The reason is that the bilateral symmetric triangular wave current will make the driving motor run with a micro-amplitude alternately in the positive and negative directions, ensuring that the no-load travel clearances in both the forward and reverse directions are detected. Since there may be differences in the clearances in the forward and reverse directions of gear meshing (such as uneven wear), symmetric excitation can completely calibrate the two-way clearance values. If only a single-direction input current (such as pure forward rotation) is used, the reverse clearance data may be systematically omitted, resulting in errors in the acquisition of compensation data.

[0064] It should be understood that the micro-amplitude current makes the displacement of the driving wheel in the tooth clearance range extremely small (such as ±2 tooth pitches), ensuring that the gear is always in the starting condition of approximately static meshing converted to dynamic meshing during the test process, avoiding the influence of inertia masking the true clearance due to high-speed movement. Secondly, the time domain of the triangular wave has a linear advantage, that is, the current rises and falls at a constant slope, making the change laws of the motor torque and speed show a predictable linear response, facilitating finding the inflection point of torque / speed, that is, the no-load travel delay singularity point, through the symmetric acquisition and fusion of the two-way clearance data by the micro-amplitude bilateral symmetric triangular wave (such as taking the mean of the two-way delay times), ensuring that the mean query table of the calibrated tooth clearance is robust to any meshing direction and avoiding compensation deviation caused by single-direction testing.

[0065] Step S002: Determine the no-load travel delay singularity point according to the motor torque record and the driven wheel speed data.

[0066] It should be noted that the torque mutation node is captured by the difference threshold method. When the driving current changes linearly, if the torque jump between adjacent sampling points exceeds the threshold (such as 0.05N·m / ms), it is determined to be a torque mutation point. This node corresponds to the critical moment when the driving wheel torque breaks through the static friction threshold of the tooth gap and is about to drive the driven wheel to rotate. The time baseline of the driving wheel leaving the idle travel state is calibrated by the event stamp.

[0067] In a feasible implementation, step S002 may include steps C11 to C13: Step C11: Determine the time node of the drive wheel torque mutation according to the motor torque record and the drive motor input current waveform data.

[0068] Step C12: Determine the time node of the driven wheel speed mutation according to the driven wheel speed data and the driving motor input current waveform data.

[0069] Step C13: Determine the idle stroke delay singularity according to the driving wheel torque mutation time node and the driven wheel speed mutation time node.

[0070] It is understandable that when the driving wheel encounters an inter-tooth gap during rotation, the idle stroke will be triggered, that is, the driving wheel has rotated but the driven wheel has not responded. This idle stroke will cause a certain delay between the torque change of the driving wheel and the speed change of the driven wheel. The idle stroke delay singularity is the quantitative expression of this delay. By capturing the time nodes of the driving wheel torque mutation and the driven wheel speed mutation, the moment when the driving wheel enters the idle stroke and leaves it can be accurately determined, thereby providing a time data basis for subsequent inter-tooth gap calculation and compensation.

[0071] It should be understood that the driving wheel torque mutation time node indicates that the driving wheel begins to overcome the static friction of the inter-tooth gap, while the driven wheel speed mutation time node indicates that the driven wheel begins to respond and enters the meshing state. The time difference between the two is the idle travel delay.

[0072] Step S003: Determine the inter-tooth clearance sample data according to the idle stroke delay singular point and the driven wheel speed data within the preset idle stroke range of the point.

[0073] It should be noted that since the idle stroke duration should not exceed the duration of one tooth alternating movement, it is necessary to first filter out the abnormal data in the original data that exceeds this duration, that is, all durations regarded as idle strokes should fall within the preset idle stroke range, and based on this duration and the driven wheel speed data near this time interval, the specific value of the inter-tooth gap can be calculated.

[0074] Step S004: Construct an inter-tooth clearance mean query table according to the combination of the inter-tooth clearance sample data and the inter-tooth meshing intervals corresponding to the dead travel delay singular points.

[0075] In a feasible implementation manner, step S004 may include steps D11 to D14: Step D11: Obtain the driving wheel rotation angle and the driven wheel rotation angle corresponding to the dead travel delay singular point.

[0076] Step D12: Determine the driving wheel interval according to the driving wheel rotation angle, and determine the driven wheel interval according to the driven wheel rotation angle.

[0077] Step D13: Determine the combination of inter-tooth meshing intervals according to the driving wheel interval and the driven wheel interval.

[0078] Step D14: Determine the mean value of the inter-tooth clearance according to the inter-tooth clearance sample data corresponding to the combination of the inter-tooth meshing intervals.

[0079] Step D15: Construct the inter-tooth clearance mean query table according to the mean value of the inter-tooth clearance and the corresponding combination of the inter-tooth meshing intervals.

[0080] It can be understood that the inter-tooth meshing state shows sector heterogeneity with the change of the meshing area (that is, the actual clearances of the same gear pair at different meshing positions are significantly different due to manufacturing tolerances or wear degrees). Therefore, in the calibration process of the inter-tooth clearance data, the mean value of the clearances corresponding to the sector combination is used to replace the calibration of the detailed inter-tooth clearance data. Specifically, on the basis of obtaining the inter-tooth clearance data in the foregoing steps, the driving wheel sector and the driven wheel sector corresponding to the clearance data are matched. For example, when the clearance data in the foregoing steps corresponds to the m-th sector of the driving wheel and the n-th sector of the driven wheel, the data is retained as a sample data under the interval combination of (m, n), and then multiple rounds of calibration are carried out until the samples of all interval combinations are sufficient to complete the overall calibration test. On the foregoing basis, the mean value calculated from the clearance data samples corresponding to each interval combination is used as the representative of the inter-tooth clearance data of this interval, and a complete inter-tooth clearance mean query table can be obtained by combining the meshing intervals to construct a two-dimensional lookup table.

[0081] It should be understood that by constructing the inter-tooth clearance mean query table, the system can quickly and accurately obtain the clearance data in the current inter-tooth meshing state during operation, and is convenient for subsequent data update. In addition, this method of the mean query table based on sector combination can also effectively reduce the long-term data processing volume and calculation volume, which is beneficial to ensuring the stable soft contact control and synchronous start-up operation of the dual-motor drive system under different working conditions according to the real-time gear state.

[0082] In this embodiment, by inputting a slightly-amplified bilateral symmetric triangular wave current, data such as the torque and rotational speed of the drive motor are recorded. The differential threshold method is used to capture torque mutation points, determine the specific points of idle stroke delay, and calculate the sample data of the tooth clearance based on this. Further, based on the angular position information of the driving wheel and the driven wheel, the tooth meshing interval combination is determined, and a tooth clearance mean query table is constructed.

[0083] In summary, this technical solution significantly improves the performance of the dual-motor drive system by accurately calibrating and compensating the tooth clearance. First, the input method of the slightly-amplified bilateral symmetric triangular wave current can comprehensively detect the forward and reverse clearances, avoiding errors caused by one-way detection and ensuring the integrity and accuracy of the data. Second, by constructing a tooth clearance mean query table, the system can quickly obtain clearance data during operation, achieve precise dynamic compensation, effectively reduce the tooth impact noise during start-stop, and improve the in-vehicle quietness. In addition, this solution reduces mechanical shock, reduces stress damage to gears and transmission components, and extends the service life of the equipment. At the same time, the mean query table method based on sector combination simplifies the data processing flow, reduces the calculation amount, improves the real-time performance and reliability of the system, not only improves the driving experience of users, but also provides an efficient and stable drive control solution for the intelligent iteration of in-vehicle equipment.

[0084] It should be noted that the above examples are only for understanding this application and do not constitute a limitation to the start-stop control method of the dual-motor in-vehicle screen of this application. Based on this technical concept, more forms of simple transformation are within the protection scope of this application.

[0085] This application also provides a start-stop control device for a dual-motor in-vehicle screen. Please refer to Figure 4 , the start-stop control device for the dual-motor in-vehicle screen includes: A data processing module 10, configured to obtain the tooth clearance data at the current moment in response to an in-vehicle screen flipping instruction; The data processing module 10 is further configured to generate bilateral soft contact control parameters according to the tooth clearance data; A motor drive module 20, configured to control the drive motor to perform tooth soft contact along the running direction according to the bilateral soft contact control parameters, so as to complete the synchronous silent start of the two motors.

[0086] In one embodiment, the data processing module 10 is further configured to obtain the driving wheel rotation angle and the driven wheel rotation angle of the in-vehicle screen at the current moment in response to the in-vehicle screen flipping instruction; determine the tooth meshing interval combination at the current moment according to the driving wheel rotation angle and the driven wheel rotation angle; and obtain the tooth clearance data corresponding to the tooth meshing interval combination based on the tooth clearance mean query table.

[0087] In one embodiment, the data processing module 10 is further configured to operate the drive motor according to a preset input current, record the motor torque data and the driven wheel speed data during the driving process, wherein the input current is a micro-amplitude bilateral symmetric triangular wave; determine the idling delay singularity point according to the motor torque record and the driven wheel speed data; determine the tooth clearance sample data according to the idling delay singularity point and the driven wheel speed data within the preset idling range corresponding to this point; and construct a tooth clearance mean query table according to the tooth clearance sample data and the tooth engagement interval combination corresponding to the idling delay singularity point.

[0088] In one embodiment, the data processing module 10 is further configured to determine the driving wheel torque mutation time node according to the motor torque record and the driving motor input current waveform data; determine the driven wheel speed mutation time node according to the driven wheel speed data and the driving motor input current waveform data; and determine the idling delay singularity point according to the driving wheel torque mutation time node and the driven wheel speed mutation time node.

[0089] In one embodiment, the data processing module 10 is further configured to obtain the driving wheel rotation angle and the driven wheel rotation angle corresponding to the idling delay singularity point; determine the driving wheel interval according to the driving wheel rotation angle, and determine the driven wheel interval according to the driven wheel rotation angle; determine the tooth engagement interval combination according to the driving wheel interval and the driven wheel interval; determine the tooth clearance mean according to the tooth clearance sample data corresponding to the tooth engagement interval combination; and construct the tooth clearance mean query table according to the tooth clearance mean and the corresponding tooth engagement interval combination.

[0090] In one embodiment, the data processing module 10 is further configured to obtain the rotation angle compensation amount of the driving wheel according to the tooth clearance data; respectively obtain the speed-time control tables for the two-side drive motors to achieve tooth synchronization soft contact according to the preset soft contact synchronization duration, the soft contact peak speed, and the rotation angle compensation amounts of the two-side driving wheels; obtain the differential control current according to the speed-time control tables, and use the differential control current as the bilateral soft contact control parameter.

[0091] In one embodiment, the data processing module 10 is further configured to determine the rotation angle acceleration according to the rotation angle compensation amount; determine the acceleration stage control duration according to the rotation angle acceleration and the soft contact peak speed; determine the constant speed stage control duration according to the acceleration contact control duration and the preset soft contact synchronization duration; and obtain the speed-time control table according to the speed acceleration, the acceleration stage control duration, and the constant speed stage control duration.

[0092] The start-stop control device for a dual-motor vehicle-mounted screen provided by this application adopts the start-stop control method for a dual-motor vehicle-mounted screen in the above embodiment, and can solve the technical problem of how to achieve synchronous silent start of the dual motors in the start-up stage in the prior art. Compared with the prior art, the beneficial effects of the start-stop control device for a dual-motor vehicle-mounted screen provided by this application are the same as those of the start-stop control method for a dual-motor vehicle-mounted screen provided by the above embodiment, and other technical features in the start-stop control device for a dual-motor vehicle-mounted screen are the same as the features disclosed in the above embodiment method, which will not be elaborated here.

[0093] This application provides a start-stop control device for a dual-motor vehicle-mounted screen. The start-stop control device for a dual-motor vehicle-mounted screen includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the start-stop control method for a dual-motor vehicle-mounted screen in the first embodiment above.

[0094] Reference is made below to Figure 5 , which shows a schematic structural diagram of a start-stop control device for a dual-motor vehicle-mounted screen suitable for implementing the embodiments of this application. The start-stop control device for a dual-motor vehicle-mounted screen in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions: tablet computers), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The start-stop control device for a dual-motor vehicle-mounted screen shown is merely an example and should not impose any limitation on the functions and usage scope of the embodiments of this application.

[0095] As Figure 5As shown, the start / stop control device for a dual-motor vehicle-mounted screen may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 into the random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the start / stop control device of the dual-motor vehicle-mounted screen are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems may be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the start / stop control device of the dual-motor vehicle-mounted screen to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows a start / stop control device of a dual-motor vehicle-mounted screen with various systems, it should be understood that it is not required to implement or have all the shown systems. More or fewer systems can be alternatively implemented or had.

[0096] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above functions defined in the method of the embodiments disclosed in the present application are executed.

[0097] The start / stop control device of the dual-motor vehicle-mounted screen provided by the present application adopts the start / stop control method of the dual-motor vehicle-mounted screen in the above embodiment, and can solve the technical problem of how to achieve synchronous silent start of the dual motors in the start-up stage in the prior art. Compared with the prior art, the beneficial effects of the start / stop control device of the dual-motor vehicle-mounted screen provided by the present application are the same as those of the start / stop control method of the dual-motor vehicle-mounted screen provided by the above embodiment, and other technical features in the start / stop control device of the dual-motor vehicle-mounted screen are the same as those disclosed in the method of the previous embodiment, and will not be elaborated here.

[0098] It should be understood that each part disclosed in this application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0099] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

[0100] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the start-stop control method of the dual-motor vehicle-mounted screen in the above embodiments.

[0101] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM: Random Access Memory), read-only memory (ROM: Read Only Memory), erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, device, or device. The program code contained on the computer-readable storage medium can be transmitted by any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0102] The above computer-readable storage medium can be included in the start-stop control device of the dual-motor vehicle-mounted screen; it can also exist alone without being assembled into the start-stop control device of the dual-motor vehicle-mounted screen.

[0103] The above computer-readable storage medium carries one or more programs, which, when executed by the start-stop control device of the dual-motor vehicle-mounted screen, cause the start-stop control device of the dual-motor vehicle-mounted screen to: in response to a vehicle-mounted screen flipping instruction, obtain the tooth gap data at the current moment; generate bilateral soft contact control parameters according to the tooth gap data; and control the drive motor to perform soft contact between teeth along the running direction according to the bilateral soft contact control parameters, so as to complete the synchronous silent start of the two motors on both sides.

[0104] Computer program code for performing the operations of the present application may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of 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 (for example, by using an Internet service provider to connect through the Internet).

[0105] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0106] The modules described in the embodiments of the present application may be implemented in software or in hardware. Wherein, the name of the module does not constitute a limitation to the unit itself in some cases.

[0107] The readable storage medium provided by this application is a computer-readable storage medium. The computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for executing the start-stop control method of the dual-motor vehicle-mounted screen, and can solve the technical problem of how to achieve synchronous silent start of the dual motors in the start-up stage in the prior art. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by this application are the same as those of the start-stop control method of the dual-motor vehicle-mounted screen provided in the above embodiments, and will not be elaborated here.

[0108] This application also provides a computer program product, including a computer program, and the steps of the start-stop control method of the dual-motor vehicle-mounted screen as described above are implemented when the computer program is executed by a processor.

[0109] The computer program product provided by this application can solve the technical problem of how to achieve synchronous silent start of the dual motors in the start-up stage in the prior art. Compared with the prior art, the beneficial effects of the computer program product provided by this application are the same as those of the start-stop control method of the dual-motor vehicle-mounted screen provided in the above embodiments, and will not be elaborated here.

[0110] The above are only partial embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of this application under the technical concept of this application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of this application.

Claims

1. A start-stop control method for a dual-motor vehicle screen, characterized in that: The start-stop control method of the dual-motor vehicle-mounted screen includes: In response to the on-board screen flipping instruction, obtaining the inter-tooth gap data at the current moment; generating bilateral soft contact control parameters according to the inter-tooth clearance data; According to the bilateral soft contact control parameters, the drive motor is controlled to perform inter-tooth soft contact along the running direction to complete synchronous silent starting of the motors on both sides.

2. The start-stop control method of the dual-motor vehicle screen according to claim 1 is characterized in that: The step of obtaining the inter-tooth clearance data at the current moment in response to the vehicle-mounted screen flipping instruction includes: In response to the vehicle screen flipping instruction, obtaining a driving wheel angle and a driven wheel angle of the vehicle screen at the current moment; Determine the meshing interval combination between teeth at the current moment according to the driving wheel rotation angle and the driven wheel rotation angle; Based on the inter-tooth clearance mean value query table, the inter-tooth clearance data corresponding to the inter-tooth meshing interval combination is obtained.

3. The start-stop control method of the dual-motor vehicle screen according to claim 2 is characterized in that: Before the step of obtaining the inter-tooth gap data at the current moment in response to the vehicle-mounted screen flipping instruction, the method further includes: The driving motor is operated according to a preset input current, and the motor torque data and the driven wheel speed data during the driving process are recorded, wherein the input current is a slightly bilaterally symmetrical triangular wave; Determining the idle stroke delay singularity point according to the motor torque record and the driven wheel speed data; Determine the inter-tooth clearance sample data according to the idle stroke delay singular point and the driven wheel speed data within the preset idle stroke range of the point; According to the combination of the inter-tooth clearance sample data and the inter-tooth meshing interval corresponding to the idle stroke delay singular point, a lookup table of the mean value of the inter-tooth clearance is constructed.

4. The start-stop control method of the dual-motor vehicle screen according to claim 3 is characterized in that: The step of determining the idle stroke delay singularity point according to the motor torque record and the driven wheel speed data includes: Determine the time node of the drive wheel torque mutation according to the motor torque record and the drive motor input current waveform data; Determine a time point when the driven wheel speed suddenly changes according to the driven wheel speed data and the driving motor input current waveform data; The idle stroke delay singular point is determined according to the driving wheel torque mutation time node and the driven wheel speed mutation time node.

5. The start-stop control method of the dual-motor vehicle screen according to claim 3 is characterized in that: The method of constructing a tooth clearance mean value lookup table according to the tooth clearance sample data and the tooth meshing interval corresponding to the idle stroke delay singular point comprises: Obtaining a driving wheel rotation angle and a driven wheel rotation angle corresponding to the idle stroke delay singularity point; Determine a driving wheel interval according to the driving wheel rotation angle, and determine a driven wheel interval according to the driven wheel rotation angle; Determining a combination of tooth meshing intervals according to the driving wheel interval and the driven wheel interval; Determining the mean value of the inter-tooth clearance according to the inter-tooth clearance sample data corresponding to the inter-tooth meshing interval combination; The inter-tooth clearance mean value lookup table is constructed according to the inter-tooth clearance mean value and the corresponding inter-tooth meshing interval combination.

6. The start-stop control method of the dual-motor vehicle screen according to claim 1 is characterized in that: The generating of bilateral soft contact control parameters according to the inter-tooth clearance data comprises: According to the inter-tooth clearance data, a rotation angle compensation amount of the driving wheel is obtained; According to the preset soft contact synchronization time, the soft contact peak speed and the rotation angle compensation amount of the driving wheels on both sides, the speed-time control table for the driving motors on both sides to achieve inter-tooth synchronous soft contact is obtained respectively; According to the speed-time control table, a differential control current is obtained, and the differential control current is used as the bilateral soft contact control parameter.

7. The start-stop control method of the dual-motor vehicle screen according to claim 6 is characterized in that: According to the preset soft contact synchronization duration, the soft contact peak speed and the rotation angle compensation amount of the driving wheels on both sides, the speed-time control table for achieving inter-tooth synchronous soft contact of the driving motors on both sides is obtained respectively, including: Determining the angular acceleration according to the angular compensation amount; Determining a control duration of an acceleration phase according to the angular acceleration and the soft contact peak speed; Determining a control duration of a uniform speed stage according to the acceleration contact control duration and the preset soft contact synchronization duration; The speed-time control table is obtained according to the speed acceleration, the control duration of the acceleration stage and the control duration of the uniform speed stage.

8. A start-stop control device for a dual-motor vehicle screen, characterized in that: The start-stop control device of the dual-motor vehicle-mounted screen comprises: A data processing module, used for obtaining the inter-tooth clearance data at the current moment in response to the on-board screen flipping instruction; The data processing module is further used to generate bilateral soft contact control parameters according to the inter-tooth clearance data; The motor drive module is used to control the drive motor to perform inter-tooth soft contact along the running direction according to the bilateral soft contact control parameters, so as to complete the synchronous silent starting of the motors on both sides.

9. A start-stop control device for a dual-motor vehicle screen, characterized in that: The start-stop control device of the dual-motor vehicle-mounted screen includes: a memory, a processor, and a start-stop control program of the dual-motor vehicle-mounted screen stored in the memory and executable on the processor. The start-stop control program of the dual-motor vehicle-mounted screen is configured to implement the steps of the start-stop control method of the dual-motor vehicle-mounted screen as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a start-stop control program for a dual-motor vehicle-mounted screen, and when the start-stop control program for the dual-motor vehicle-mounted screen is executed by a processor, the steps of the start-stop control method for a dual-motor vehicle-mounted screen as described in any one of claims 1 to 7 are implemented.

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