Optimization Method, Device and Storage Medium for Initial Angle of P Gear Mechanism Unlocking

Abstract

The present application discloses an optimization method, device and computer storage medium for the unlocking initial angle of a P gear mechanism, including: building a part model based on the feature constraints and tolerance requirements of each component part of the P gear mechanism; establishing an assembly model of the P gear mechanism based on the kinematic assembly constraint relationship of the part model; running dimension chain and tolerance sensitivity analysis according to the assembly model of the P gear mechanism to obtain an influence amount for characterizing the influence of the tolerances of each component part on the cumulative tolerance of the unlocking initial angle of the P gear mechanism; when it is determined that the cumulative tolerance of the unlocking initial angle of the P gear mechanism is not within the preset tolerance threshold range, modifying the structures or tolerances of the top N component parts with larger influence amounts so that the cumulative tolerance of the final unlocking initial angle of the P gear mechanism is within the preset tolerance threshold range. In this way, the R & D time is shortened, the robustness of the design of the P gear mechanism is improved, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the field of computer-aided design, and particularly to an optimization method, device, and computer storage medium for the unlocking initial angle of a P gear mechanism. Background Art

[0002] The parking system generally consists of three major parts: a P gear motor, a P gear mechanism, and a P gear controller. Among them, referring to Figure 1 、 Figure 2 and Figure 3 , the P gear mechanism is composed of a bevel gear, a rack lock pin assembly, a spur gear, a parking bracket, a rotating shaft, a ratchet wheel, a pawl, etc. The parking principle of the P gear mechanism is as follows: The motor inputs torque, which is transmitted through a pair of bevel gears and then through a spur gear. The rack lock pin assembly moves, pushing the pawl to rotate around the rotating shaft to achieve parking and return. Among them, the motor uses a DC motor, the ECU directly drives the motor, and the angle sensor feeds back the motor stroke. The control system determines whether the mechanism is locked / unlocked through the angular position of the angle sensor mounting shaft. The P gear controller realizes the locking / unlocking function by cutting off the current of the P gear motor. The control strategy of the P gear system stipulates that when the driver shifts into D gear and the P gear is not fully unlocked, even if the accelerator pedal is depressed, the vehicle will have no power output and cannot move. Therefore, if the unlocking initial angle is not reasonably designed, when the P gear is unlocked, the unlocking is not in place, but it is misreported as in place, resulting in gear knocking during P gear unlocking (the ratchet wheel and the pawl collide). Seriously, it can cause the installation bracket of the P gear mechanism to break, the P gear mechanism to fail, and the vehicle cannot move.

[0003] Currently, when developing and designing the P gear mechanism, only the unlocking initial angle of the P gear mechanism in the theoretical state can be analyzed. To obtain the unlocking reliability performance of the P gear mechanism on a real vehicle, it is necessary to calibrate the unlocking initial angle of the P gear mechanism and conduct a large number of real vehicle road tests. This is not only time-consuming and laborious, with low operability, but also difficult to correlate the unlocking initial angle tolerance of the P gear mechanism with the manufacturing and assembly tolerances of parts, and evaluate and optimize the unlocking initial angle tolerance of the P gear mechanism. In addition, it is only possible to evaluate and optimize the unlocking initial angle tolerance of the P gear mechanism at the real vehicle verification stage, which poses a great challenge and waste to time and cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an optimization method, device, and computer storage medium for the unlocking initial angle of a P gear mechanism, which can shorten the R & D time, improve the robustness of the P gear mechanism design, and save costs.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] In a first aspect, an embodiment of the present invention provides an optimization method for the unlocking initial angle of a P gear mechanism, the method including:

[0007] Based on the feature constraints and tolerance requirements of the components of the P - gear mechanism, build component models;

[0008] Based on the kinematic assembly constraint relationships of the component models, establish an assembly model of the P - gear mechanism;

[0009] According to the assembly model of the P - gear mechanism, run dimensional chain and tolerance sensitivity analysis to obtain the influence amounts used to characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism;

[0010] When it is determined that the cumulative tolerance of the initial unlocking angle of the P - gear mechanism is not within the preset tolerance threshold range, modify the structures or tolerances of the top N components with larger influence amounts so that the cumulative tolerance of the initial unlocking angle of the final P - gear mechanism is within the preset tolerance threshold range.

[0011] As one implementation, the building of the part models based on the feature constraints and tolerance requirements of the components of the P - gear mechanism includes:

[0012] According to the dimensional requirements of the components that make up the P - gear mechanism, constrain the features of the components that make up the P - gear mechanism, add feature tolerances, and establish the part models corresponding to the components that make up the P - gear mechanism.

[0013] As one implementation, the establishment of the assembly model of the P - gear mechanism based on the kinematic assembly constraint relationships of the part models includes:

[0014] Simulate the assembly process on the production line, use three - dimensional dimensional chain analysis software, add kinematic assembly constraint relationships to the part models corresponding to the components that make up the P - gear mechanism, form a complete dimensional chain loop, and establish the assembly model of the P - gear mechanism.

[0015] As one implementation, the running of dimensional chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism to obtain the influence amounts used to characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism includes:

[0016] Determine the measurement target according to the analysis requirements;

[0017] Conduct dimensional chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P - gear mechanism to obtain the analysis results;

[0018] Obtain the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P - gear mechanism and the tolerances of the components according to the analysis results;

[0019] Based on the correlation between the initial unlocking angle cumulative tolerance of the P - gear mechanism and the tolerances of components, determine the influence quantity used to characterize the influence of the tolerances of each component on the initial unlocking angle cumulative tolerance of the P - gear mechanism.

[0020] As one implementation, the measurement target includes the angle of the angle sensor sensing shaft.

[0021] In a second aspect, an embodiment of the present invention provides an optimization device for the initial unlocking angle of a P - gear mechanism. The device includes:

[0022] A model - building module, configured to build a part model based on the feature constraints and tolerance requirements of each component of the P - gear mechanism; and, based on the kinematic assembly constraint relationship of the part model, establish an assembly model of the P - gear mechanism.

[0023] An analysis module, configured to perform dimension chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism, and obtain the influence quantity used to characterize the influence of the tolerances of each component on the initial unlocking angle cumulative tolerance of the P - gear mechanism.

[0024] A processing module, configured to modify the structure or tolerance of the top N components with larger influence quantities when the initial unlocking angle cumulative tolerance of the P - gear mechanism is not within the preset tolerance threshold range, so that the final initial unlocking angle cumulative tolerance of the P - gear mechanism is within the preset tolerance threshold range.

[0025] As one implementation, the model - building module is specifically configured to:

[0026] According to the dimension requirements of each component constituting the P - gear mechanism, constrain the features of each component constituting the P - gear mechanism, and add feature tolerances to establish the part models corresponding to each component constituting the P - gear mechanism.

[0027] As one implementation, the analysis module is specifically configured to:

[0028] Determine the measurement target according to the analysis requirements;

[0029] Perform dimension chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P - gear mechanism to obtain the analysis result;

[0030] Obtain the correlation between the initial unlocking angle cumulative tolerance of the P - gear mechanism and the tolerances of components according to the analysis result;

[0031] Based on the correlation between the initial unlocking angle cumulative tolerance of the P - gear mechanism and the tolerances of components, determine the influence quantity used to characterize the influence of the tolerances of each component on the initial unlocking angle cumulative tolerance of the P - gear mechanism.

[0032] In a third aspect, an embodiment of the present invention provides an optimization device for the initial unlocking angle of a P - gear mechanism. The device includes a processor and a memory for storing a program. When the program is executed by the processor, the processor implements the steps of the optimization method for the initial unlocking angle of the P - gear mechanism described in the first aspect.

[0033] In a fourth aspect, an embodiment of the present invention provides a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the optimization method for the initial unlocking angle of the P - gear mechanism described in the first aspect.

[0034] The optimization method, device, and computer storage medium for the initial unlocking angle of the P - gear mechanism provided by the embodiments of the present invention. The method includes: building a part model based on the characteristic constraints and tolerance requirements of the components of the P - gear mechanism; establishing an assembly model of the P - gear mechanism based on the kinematic assembly constraint relationship of the part model; running dimensional chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism to obtain an influence quantity used to characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism; when it is determined that the cumulative tolerance of the initial unlocking angle of the P - gear mechanism is not within the preset tolerance threshold range, modifying the structure or tolerance of the top N components with larger influence quantities so that the cumulative tolerance of the final initial unlocking angle of the P - gear mechanism is within the preset tolerance threshold range. In this way, a new and fast solution is provided for the design and optimization of the initial unlocking angle of the P - gear mechanism, significantly shortening the R & D time, improving the robustness of the P - gear mechanism design, effectively avoiding quality problems such as the unlocking failure of the P - gear mechanism caused by unreasonable design of the initial unlocking angle of the P - gear mechanism, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the P - gear mechanism Figure 1 ;

[0036] Figure 2 Schematic diagram of the P - gear mechanism Figure 2 ;

[0037] Figure 3 Schematic diagram of the P - gear mechanism Figure 3 ;

[0038] Figure 4 Flow chart of the optimization method for the initial unlocking angle of the P - gear mechanism provided by the embodiment of the present invention;

[0039] Figure 5 Specific flow chart of the optimization method for the initial unlocking angle of the P - gear mechanism provided by the embodiment of the present invention;

[0040] Figure 6 Schematic diagram of the assembly sequence of the P - gear mechanism in the embodiment of the present invention;

[0041] Figure 7 Structural schematic of the optimization device for the initial unlocking angle of the P - gear mechanism provided by the embodiment of the present invention Figure 1 ;

[0042] Figure 8 Structural schematic of the optimization device for the initial unlocking angle of the P - gear mechanism provided by the embodiment of the present invention Figure 2 。 Detailed implementation manners

[0043] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element. In addition, components, features, and elements with the same name in different embodiments of the present invention may have the same meaning or different meanings, and their specific meanings need to be determined according to their explanations in the specific embodiments or further in combination with the context of the specific embodiments.

[0044] It should be understood that although terms such as first, second, and third may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this article, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition only occurs when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0045] It should be understood that although the steps in the flowchart in the embodiments of the present invention are shown in sequence according to the indication of the arrows, these steps are not necessarily executed in the sequence indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict sequence limitation, and they can be executed in other sequences. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution sequence is not necessarily in sequence, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0046] It should be noted that in this article, step codes such as S101 and S102 are used. The purpose is to more clearly and briefly express the corresponding content and do not constitute a substantial limitation in sequence. Those skilled in the art may execute S102 first and then S101 during specific implementation, etc., but these should all be within the protection scope of the present invention.

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention will be further described in detail below in conjunction with the specification drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] Refer to Figure 4 , which is a schematic flowchart of an optimization method for the initial unlocking angle of a P gear mechanism provided by an embodiment of the present invention. This method can be executed by an optimization device for the initial unlocking angle of a P gear mechanism provided by an embodiment of the present invention. The optimization device for the initial unlocking angle of the P gear mechanism can be implemented in software and / or hardware. The method includes the following steps:

[0049] Step S101: Build a component model based on the characteristic constraints and tolerance requirements of each component of the P gear mechanism;

[0050] Specifically, according to the dimensional requirements of each component constituting the P gear mechanism, constrain the characteristics of each component constituting the P gear mechanism, add characteristic tolerances, and establish the corresponding component models of each component constituting the P gear mechanism.

[0051] Understandably, each component that makes up the P-gear mechanism has different dimensional requirements due to its position and the need for mutual matching. That is to say, for a single component, the features of the component can be constrained according to the dimensional requirements of the component, and feature tolerances can be added, so as to build the corresponding component model of the component, so as to accurately construct the component model. Here, the constraints on the features of each component that makes up the P-gear mechanism and the addition of feature tolerances can be set in combination with actual requirements.

[0052] Step S102: Based on the kinematic assembly constraint relationship of the component model, establish an assembly model of the P-gear mechanism;

[0053] Specifically, simulate the assembly process on the production line, and use three-dimensional dimension chain analysis software to add kinematic assembly constraint relationships to the component models corresponding to the components that make up the P-gear mechanism to form a complete dimension chain loop, and establish an assembly model of the P-gear mechanism.

[0054] Understandably, after determining the component models corresponding to the components that make up the P-gear mechanism, kinematic assembly constraint relationships can be added to the component models corresponding to the components that make up the P-gear mechanism, so as to establish an assembly model of the P-gear mechanism, so as to facilitate subsequent optimization of the initial unlocking angle of the P-gear mechanism based on the assembly model of the P-gear mechanism.

[0055] Step S103: According to the assembly model of the P-gear mechanism, run dimension chain and tolerance sensitivity analysis to obtain the influence amount used to characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P-gear mechanism;

[0056] Among them, the influence quantity is used to characterize the influence factor of the component tolerance on the cumulative tolerance of the initial unlocking angle of the P gear mechanism. The larger the influence quantity corresponding to a certain component, the greater the influence of the tolerance of this component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism; while the smaller the influence quantity corresponding to a certain component, the smaller the influence of the tolerance of this component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism. In an embodiment, running dimensional chain and tolerance sensitivity analysis according to the assembly model of the P gear mechanism to obtain the influence quantity for characterizing the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism includes: determining a measurement target according to the analysis requirements; performing dimensional chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P gear mechanism to obtain an analysis result; obtaining the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P gear mechanism and the component tolerances according to the analysis result; based on the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P gear mechanism and the component tolerances, determining the influence quantity for characterizing the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism. Among them, the measurement target can be set according to actual needs. In this embodiment, the measurement target includes the angle of the angle sensor induction shaft as an example. Here, since the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P gear mechanism and the component tolerances can characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism, therefore, based on the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P gear mechanism and the component tolerances, the influence quantity for characterizing the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P gear mechanism can be determined.

[0057] Step S104: When it is determined that the cumulative tolerance of the initial unlocking angle of the P gear mechanism is not within the preset tolerance threshold range, modify the structure or tolerance of the top N components with larger influence quantities so that the final cumulative tolerance of the initial unlocking angle of the P gear mechanism is within the preset tolerance threshold range.

[0058] It can be understood that after obtaining the cumulative tolerance of the initial unlocking angle of the P gear mechanism, it can be detected whether the cumulative tolerance of the initial unlocking angle of the P gear mechanism is within the preset tolerance threshold range. If it is determined that the cumulative tolerance of the initial unlocking angle of the P gear mechanism is not within the preset tolerance threshold range, it means that the initial unlocking angle of the P gear mechanism needs to be further optimized. Then, modify the structure or tolerance of the top N components with larger influence quantities, and then return to execute steps S101 to S104 until it is detected that the cumulative tolerance of the initial unlocking angle of the P gear mechanism is within the preset tolerance threshold range. Among them, the tolerance threshold range can be set according to actual needs, such as it can be set to 4 degrees to 6 degrees, etc.

[0059] In summary, in the optimization method for the unlocking initial angle of the P - gear mechanism provided by the above - mentioned embodiments, by applying the three - dimensional dimension chain analysis method to the unlocking initial angle tolerance control technology of the P - gear mechanism, and developing a gear modeling and motion modeling method, in order to meet the setting requirements of the control parameters of the P - gear mechanism, the tolerances of some key components can be effectively controlled, and the tolerance requirements of non - sensitive components can be reduced. In this way, a new and rapid solution is provided for the design and optimization of the unlocking initial angle of the P - gear mechanism, significantly shortening the R & D time, improving the robustness of the P - gear mechanism design, effectively avoiding quality problems such as the unlocking failure of the P - gear mechanism caused by unreasonable design of the unlocking initial angle of the P - gear mechanism, and saving costs.

[0060] Based on the same inventive concept as the foregoing embodiments, this embodiment details the technical solutions of the foregoing embodiments through specific examples. This example aims to propose a method of using three - dimensional dimension chain analysis technology to establish the correlation relationship and sensitivity coefficient between the unlocking initial angle of the P - gear mechanism and the component tolerances, which can quickly analyze the tolerance range of the unlocking initial angle of the P - gear mechanism at the data design stage, and can analyze the sensitivity of the component tolerances to the tolerance of the unlocking initial angle of the P - gear mechanism, thereby providing a solution for the design and optimization of the unlocking initial angle.

[0061] Refer to Figure 5 , which is a schematic flow chart of the specific process of the optimization method for the unlocking initial angle of the P - gear mechanism provided by the embodiments of the present invention, including the following steps:

[0062] Step S201: Build a component model;

[0063] Specifically, for a single part / assembly, according to the drawing dimensions requirements of the components and assemblies, constrain the part features and add feature tolerances.

[0064] Step S202: Assembly modeling;

[0065] Specifically, simulate the assembly process on the production line, and use Cetol software to add kinematic assembly constraint relationships to each component part of the P - gear mechanism to form a complete dimension chain loop. Among them, refer to Figure 6 , which is a schematic diagram of the assembly sequence of the P - gear mechanism.

[0066] Step S203: Add measurement dimensions;

[0067] Specifically, establish a measurement target according to the analysis requirements, such as defining the angle of the induction shaft of the angle sensor as the measurement dimension.

[0068] Step S204: Run the analysis;

[0069] Specifically, after the model is established, run the dimension chain analysis and tolerance sensitivity analysis.

[0070] Step S205: Tolerance optimization analysis.

[0071] Specifically, if the cumulative tolerance of the angle sensor sensing axis angle obtained by the analysis exceeds the set tolerance range, it is necessary to design and modify the structures or tolerances of the components with the top several influencing quantities, that is, repeat steps S201 to S205 until the cumulative tolerance meets the set tolerance requirements.

[0072] In summary, in the optimization method for the initial unlocking angle of the P - gear mechanism provided by the above - mentioned embodiments, the following innovative points exist: 1) Apply the three - dimensional dimension chain analysis method to the tolerance control technology of the initial unlocking angle of the P - gear mechanism, and develop a gear modeling and kinematic modeling method; 2) Directly associate the dimensional tolerances of components with the setting of the control parameters of the P - gear mechanism and sort them according to the degree of influence. At the same time, the following effects are achieved: 1) Provide a fast and effective method to solve the problem of P - gear mechanism unlocking failure, greatly reducing the manpower, material resources, and time consumed by the existing methods to solve this problem; 2) Can analyze the tolerance level of the initial unlocking angle of the P - gear mechanism of existing vehicle models and provide an optimization plan; 3) In order to meet the setting requirements of the control parameters of the P - gear mechanism, effectively control the tolerances of some key components, reduce the tolerance requirements of non - sensitive components, and thus reduce the component cost.

[0073] Based on the same inventive concept as the foregoing embodiments, refer to Figure 7 , which is a schematic structural diagram of an optimization device for the initial unlocking angle of a P - gear mechanism provided by an embodiment of the present invention. The device includes:

[0074] A model - building module 10, configured to build a part model based on the feature constraints and tolerance requirements of each component of the P - gear mechanism; and, based on the kinematic assembly constraint relationship of the part model, establish an assembly model of the P - gear mechanism;

[0075] An analysis module 11, configured to run dimension chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism, and obtain an influence quantity used to characterize the influence of the tolerances of each component on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism;

[0076] A processing module 12, configured to modify the structures or tolerances of the top N components with larger influence quantities when the cumulative tolerance of the initial unlocking angle of the P - gear mechanism is not within the preset tolerance threshold range, so that the cumulative tolerance of the final initial unlocking angle of the P - gear mechanism is within the preset tolerance threshold range.

[0077] In summary, in the optimization device for the unlocking initial angle of the P - gear mechanism provided by the above - mentioned embodiments, by applying the three - dimensional dimensional chain analysis method to the tolerance control technology of the unlocking initial angle of the P - gear mechanism, and developing the gear modeling and motion modeling methods, and in order to meet the setting requirements of the control parameters of the P - gear mechanism, the tolerances of some key components can be effectively controlled, and the tolerance requirements of non - sensitive components can be reduced. Thus, a new and rapid solution is provided for the design and optimization of the unlocking initial angle of the P - gear mechanism, significantly shortening the R & D time, improving the robustness of the P - gear mechanism design, effectively avoiding quality problems such as the unlocking failure of the P - gear mechanism caused by unreasonable design of the unlocking initial angle of the P - gear mechanism, and saving costs.

[0078] In one embodiment, the model - building module 10 is specifically configured to:

[0079] According to the dimensional requirements of each component constituting the P - gear mechanism, constrain the features of each component constituting the P - gear mechanism, add feature tolerances, and establish the part models corresponding to each component constituting the P - gear mechanism.

[0080] In one embodiment, the model - building module 10 is specifically configured to:

[0081] Simulate the assembly process on the production line, use three - dimensional dimensional chain analysis software, add kinematic assembly constraint relationships to the component models corresponding to each component constituting the P - gear mechanism, form a complete dimensional chain loop, and establish the assembly model of the P - gear mechanism.

[0082] In one embodiment, the analysis module 11 is specifically configured to:

[0083] Determine the measurement target according to the analysis requirements;

[0084] Perform dimensional chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P - gear mechanism to obtain the analysis result;

[0085] Obtain the correlation relationship between the cumulative tolerance of the unlocking initial angle of the P - gear mechanism and the component tolerances according to the analysis result;

[0086] Based on the correlation relationship between the cumulative tolerance of the unlocking initial angle of the P - gear mechanism and the component tolerances, determine the influence amount used to characterize the influence of each component tolerance on the cumulative tolerance of the unlocking initial angle of the P - gear mechanism.

[0087] In one embodiment, the measurement target includes the angle of the angle sensor induction shaft.

[0088] Based on the same inventive concept as the foregoing embodiments, the embodiments of the present invention provide an optimization device for the unlocking initial angle of a P - gear mechanism, as Figure 8As shown, the device includes: a processor 110 and a memory 111 for storing a computer program that can run on the processor 110; wherein, Figure 8 The processor 110 shown in Figure 8 does not refer to the number of processors 110 being one, but only refers to the positional relationship of the processor 110 relative to other components. In practical applications, the number of processors 110 can be one or more; similarly, Figure 8 The memory 111 shown in Figure 8 has the same meaning, that is, it only refers to the positional relationship of the memory 111 relative to other components. In practical applications, the number of memories 111 can be one or more. When the processor 110 is used to run the computer program, it implements the optimization method for the initial unlocking angle of the P - gear mechanism.

[0089] The device may further include: at least one network interface 112. Each component in the device is coupled together through a bus system 113. It can be understood that the bus system 113 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 113 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear illustration, in Figure 8 all kinds of buses are labeled as the bus system 113.

[0090] Among them, the memory 111 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), an electrically erasable programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), a ferromagnetic random access memory (FRAM, ferromagnetic random access memory), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM, Compact Disc Read-Only Memory); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as a static random access memory (SRAM, Static Random Access Memory), a synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), a dynamic random access memory (DRAM, Dynamic Random Access Memory), a synchronous dynamic random access memory (SDRAM, Synchronous Dynamic Random Access Memory), a double data rate synchronous dynamic random access memory (DDR SDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), an enhanced synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), a sync link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), a direct rambus random access memory (DRRAM, Direct Rambus Random Access Memory).The memory 111 described in the embodiments of the present invention is intended to include, but not limited to, these and any other suitable types of memories.

[0091] The memory 111 in the embodiments of the present invention is used to store various types of data to support the operation of the device. Examples of such data include: any computer programs for operating on the device, such as operating systems and application programs; contact data; phone book data; messages; pictures; videos, etc. Among them, the operating system contains various system programs, such as the framework layer, the core library layer, the driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application programs can include various application programs, such as a Media Player, a Browser, etc., for implementing various application services. Here, the program for implementing the method of the embodiments of the present invention can be included in the application programs.

[0092] Based on the same inventive concept as the foregoing embodiments, this embodiment also provides a computer storage medium. The computer storage medium stores a computer program. The computer storage medium can be a ferromagnetic random access memory (FRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM), etc.; it can also be various devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc. When the computer program stored in the computer storage medium is run by a processor, the optimization method for the initial unlocking angle of the P gear mechanism described above is implemented. For the specific step flow implemented when the computer program is executed by the processor, please refer to Figure 4 the description of the shown embodiments, which will not be repeated here.

[0093] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0094] In this text, the terms "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion. In addition to the elements listed, other elements not expressly listed may also be included.

[0095] As described above, this is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. An optimization method for the initial unlocking angle of a P - gear mechanism, characterized in that, the method includes: Based on the characteristic constraints and tolerance requirements of each component part of the P - gear mechanism, build a component part model; Based on the kinematic assembly constraint relationship of the component part model, establish an assembly model of the P - gear mechanism; According to the assembly model of the P - gear mechanism, run dimensional chain and tolerance sensitivity analysis to obtain an influence quantity used to characterize the influence degree of the tolerance of each component part on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism; When it is determined that the cumulative tolerance of the initial unlocking angle of the P - gear mechanism is not within the preset tolerance threshold range, modify the structure or tolerance of the top N component parts with larger influence quantities so that the cumulative tolerance of the final P - gear mechanism's initial unlocking angle is within the preset tolerance threshold range.

2. The method according to claim 1, characterized in that, the building of the component part model based on the characteristic constraints and tolerance requirements of each component part of the P - gear mechanism includes: According to the dimension requirements of each component part constituting the P - gear mechanism, constrain the characteristics of each component part constituting the P - gear mechanism, add characteristic tolerances, and establish a corresponding component part model for each component part constituting the P - gear mechanism.

3. The method according to claim 1, characterized in that, the establishment of the assembly model of the P - gear mechanism based on the kinematic assembly constraint relationship of the component part model includes: Simulate the assembly process on the production line, and use three - dimensional dimensional chain analysis software to add kinematic assembly constraint relationships to the corresponding component part models of each component part constituting the P - gear mechanism to form a complete dimensional chain loop, and establish an assembly model of the P - gear mechanism.

4. The method according to claim 1, characterized in that, the running of dimensional chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism to obtain an influence quantity used to characterize the influence degree of the tolerance of each component part on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism includes: Determine the measurement target according to the analysis requirements; Conduct dimensional chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P - gear mechanism to obtain an analysis result; Obtain the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P - gear mechanism and the component part tolerance according to the analysis result; Based on the correlation relationship between the cumulative tolerance of the initial unlocking angle of the P - gear mechanism and the component part tolerance, determine an influence quantity used to characterize the influence degree of the tolerance of each component part on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism.

5. The method according to claim 4, characterized in that, the measurement target includes the angle of the angle sensor induction shaft.

6. An optimization device for the initial unlocking angle of a P - gear mechanism, characterized in that, the device includes: A model - building module, configured to build a part model based on the characteristic constraints and tolerance requirements of each component part of the P - gear mechanism; and, based on the kinematic assembly constraint relationship of the part model, establish an assembly model of the P - gear mechanism; An analysis module, configured to run dimensional chain and tolerance sensitivity analysis according to the assembly model of the P - gear mechanism to obtain an influence quantity used to characterize the influence degree of the tolerance of each component part on the cumulative tolerance of the initial unlocking angle of the P - gear mechanism; A processing module, configured to modify the structures or tolerances of the first N components with relatively large influence amounts when it is determined that the cumulative tolerance of the initial unlocking angle of the P-gear mechanism is not within the preset tolerance threshold range, so that the cumulative tolerance of the initial unlocking angle of the final P-gear mechanism is within the preset tolerance threshold range.

7. The device according to claim 6, wherein, the model building module is specifically configured to: constrain the features of the components constituting the P-gear mechanism according to the dimensional requirements of the components constituting the P-gear mechanism, add feature tolerances, and build part models corresponding to the components constituting the P-gear mechanism.

8. The device according to claim 6, wherein, the analysis module is specifically configured to: determine a measurement target according to the analysis requirements; perform dimensional chain analysis and tolerance sensitivity analysis on the measurement target according to the assembly model of the P-gear mechanism to obtain an analysis result; obtain the correlation between the cumulative tolerance of the initial unlocking angle of the P-gear mechanism and the component tolerances according to the analysis result; based on the correlation between the cumulative tolerance of the initial unlocking angle of the P-gear mechanism and the component tolerances, determine the influence amount used to characterize the influence of each component tolerance on the cumulative tolerance of the initial unlocking angle of the P-gear mechanism.

9. An optimization device for the initial unlocking angle of a P-gear mechanism, wherein, the device includes a processor and a memory for storing a program; when the program is executed by the processor, the processor implements the steps of the optimization method for the initial unlocking angle of the P-gear mechanism according to any one of claims 1 to 5.

10. A computer storage medium, wherein, a computer program is stored, and when the computer program is executed by a processor, the steps of the optimization method for the initial unlocking angle of the P-gear mechanism according to any one of claims 1 to 5 are implemented.

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