Suspension system component reliability acquisition method, device, equipment and storage medium

Abstract

The present invention belongs to the field of reliability technology, and discloses a method, device, equipment and storage medium for obtaining the reliability of suspension system components. The present invention determines the reliability distribution order of each component according to the overlap relationship of the suspension system components; and determines the target component reliability of each component of the suspension system according to the reliability distribution order. The motion model of the suspension system is determined by the overlap relationship of the suspension system components, and then the motion characteristics of the suspension system are sorted out to determine the reliability distribution order of each component, and then invisible redundancy is introduced into the distribution of the suspension system reliability. Finally, the reliability of each component of the suspension system is obtained, which improves the efficiency of reliability calculation and makes the system reliability closer to the full life design.

Description

Technical Field

[0001] The present invention relates to the field of reliability technology, and in particular to a method, device, equipment and storage medium for obtaining reliability of suspension system components. Background Art

[0002] With the rapid development of electrification in the automotive industry, the requirements for reliability design level are getting higher and higher. Therefore, each system should carry out reliability-related estimation and analysis in a timely manner in the early pre-research and selection stages, including life, reliability, block diagram, problems to be avoided and other multiple reliability system analyses. Among them, reliability is the key item in reliability target setting. However, under the current rapid development cycle, due to the complexity of reliability distribution calculation and the large number of parameters required, it is difficult to effectively obtain the effective reliability of the system due to insufficient accumulation of reliability data. Therefore, in the existing project development, each product engineer or reliability engineer will directly assign reliability to components based on experience, without fully considering the reliability and redundancy of components in the rectification motion system. As a result, the reliability design is too high, resulting in cost waste, and the reliability design is too low, resulting in a sharp increase in the cost of later design changes and rectification verification, which brings a considerable burden to project development. Therefore, due to unreasonable reliability design, the existing reliability distribution method is inefficient.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a method, device, equipment and storage medium for obtaining reliability of suspension system components, aiming to solve the technical problem of low efficiency of existing reliability allocation methods.

[0005] To achieve the above object, the present invention provides a method for obtaining the reliability of suspension system components, the method comprising the following steps:

[0006] Determine the reliability distribution order of each component according to the overlap relationship of the suspension system components;

[0007] The target component reliability of each component of the suspension system is determined according to the reliability allocation order.

[0008] Optionally, determining the target component reliability of each component of the suspension system according to the reliability distribution order includes:

[0009] Determine the invisible redundancy according to the fault perception amount and the fault design amount;

[0010] Determining a reliability increment according to the invisible redundancy and a preset failure rate;

[0011] Determining a component redundancy reliability calculation formula according to the reliability increment and the suspension component reliability calculation formula, wherein the component redundancy reliability calculation formula includes a series redundancy reliability calculation formula and a parallel redundancy reliability calculation formula;

[0012] The target component reliability of each component of the suspension system is determined according to the reliability allocation order and the component redundancy reliability calculation formula.

[0013] Optionally, the series redundancy reliability calculation formula is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability;

[0014] The parallel redundancy reliability calculation formula is: ] (i=n, n-1, n-2, ┄, 1), where i is the number of remaining components of the suspension system with decreasing reliability;

[0015] Wherein, R is the reliability of the nth component in the suspension system, Rn-1 is the reliability of the n-1th upstream component, Rn-2 is the reliability of the n-2th upstream component, r is the invisible redundancy of the suspension system, and λ is the failure rate of the suspension system.

[0016] Optionally, determining the target component reliability of each component of the suspension system according to the reliability distribution order includes:

[0017] Determining the component order of the target component according to the reliability distribution order;

[0018] determining a plurality of upstream components according to a component order of a target component, and obtaining upstream component reliabilities of the plurality of upstream components;

[0019] The reliability of the upstream components of the plurality of upstream components is calculated according to the suspension component reliability calculation formula to obtain the target component reliability.

[0020] Optionally, the reliability calculation of the upstream component reliabilities of the plurality of upstream components according to the suspension component reliability calculation formula to obtain the target component reliability includes:

[0021] When the overlap relationship of the suspension system components is a component series overlap relationship, reliability calculation is performed on the upstream component reliability of multiple upstream components according to the component series reliability calculation formula in the suspension component reliability calculation formula to obtain the target component reliability;

[0022] When the overlap relationship of suspension system components is a component parallel overlap relationship, reliability calculation is performed on upstream component reliabilities of multiple upstream components according to the component parallel reliability calculation formula in the suspension component reliability calculation formula to obtain target component reliability.

[0023] Optionally, the component series reliability calculation formula is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability;

[0024] The calculation formula of the parallel reliability of the components is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with decreasing reliability;

[0025] Among them, R n is the reliability of the nth component in the suspension system, R n-1 is the reliability of n-1 upstream components, R n-2 is the reliability of n-2 upstream components.

[0026] Optionally, determining the reliability distribution order of each component according to the overlapping relationship of the suspension system components includes:

[0027] Determine the load transfer path corresponding to the suspension system according to the overlap relationship of the suspension system components;

[0028] Constructing a load transfer mathematical model according to a load transfer path corresponding to the suspension system, a motion balance relationship of the suspension system, and a lap relationship of components of the suspension system;

[0029] Determining fatigue relationships of various components of the suspension system based on the load transfer mathematical model;

[0030] Determine the damage ranking of each component corresponding to the preset failure mode according to the fatigue relationship of each component of the suspension system;

[0031] The reliability distribution order is determined according to the overlapping relationship of the suspension system components and the damage ranking method of each component.

[0032] In addition, to achieve the above-mentioned purpose, the present invention further proposes a suspension system component reliability acquisition device, the suspension system component reliability acquisition device comprising:

[0033] A processing module, used for determining a reliability distribution order of each component according to an overlap relationship of the suspension system components;

[0034] The acquisition module is used to determine the target component reliability of each component of the suspension system according to the reliability distribution order.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a suspension system component reliability acquisition device, which includes: a memory, a processor, and a suspension system component reliability acquisition program stored in the memory and executable on the processor, and the suspension system component reliability acquisition program is configured to implement the steps of the suspension system component reliability acquisition method as described above.

[0036] In addition, to achieve the above objectives, the present invention also proposes a storage medium, on which a suspension system component reliability acquisition program is stored, and when the suspension system component reliability acquisition program is executed by a processor, the steps of the suspension system component reliability acquisition method described above are implemented.

[0037] The present invention determines the reliability distribution order of each component according to the overlap relationship of the suspension system components; and determines the target component reliability of each component of the suspension system according to the reliability distribution order. The suspension system motion model is determined by the overlap relationship of the suspension system components, and then the motion characteristics of the suspension system are sorted out to determine the reliability distribution order of each component, and then invisible redundancy is introduced into the distribution of the suspension system reliability. Finally, the reliability of each component of the suspension system is obtained, which improves the efficiency of reliability calculation and makes the system reliability closer to the full life design. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a suspension system component reliability acquisition device in a hardware operating environment involved in an embodiment of the present invention;

[0039] Figure 2 It is a flow chart of a first embodiment of a method for obtaining reliability of a suspension system component according to the present invention;

[0040] Figure 3 A schematic diagram of a suspension system block diagram of an embodiment of a method for obtaining reliability of suspension system components of the present invention;

[0041] Figure 4 It is a flow chart of a second embodiment of a method for obtaining reliability of suspension system components according to the present invention;

[0042] Figure 5 A schematic diagram of the motion of a four-degree-of-freedom suspension system according to an embodiment of a method for obtaining reliability of suspension system components of the present invention;

[0043] Figure 6 It is a structural block diagram of the first embodiment of the device for obtaining reliability of suspension system components of the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] 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.

[0046] Reference Figure 1 , Figure 1 The present invention is a schematic diagram of a device structure for obtaining the reliability of suspension system components in a hardware operating environment according to an embodiment of the present invention.

[0047] like Figure 1 As shown, the suspension system component reliability acquisition device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the suspension system component reliability acquisition device, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0049] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a suspension system component reliability acquisition program.

[0050] exist Figure 1In the suspension system component reliability acquisition device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the suspension system component reliability acquisition device of the present invention can be set in the suspension system component reliability acquisition device, and the suspension system component reliability acquisition device calls the suspension system component reliability acquisition program stored in the memory 1005 through the processor 1001, and executes the suspension system component reliability acquisition method provided by the embodiment of the present invention.

[0051] The embodiment of the present invention provides a method for obtaining the reliability of a suspension system component. Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of a method for obtaining reliability of suspension system components according to the present invention.

[0052] In this embodiment, the method for obtaining the reliability of suspension system components includes the following steps:

[0053] Step S10: Determine the reliability distribution order of each component according to the overlapping relationship of the suspension system components.

[0054] It should be noted that the executor of this embodiment is a suspension system component reliability acquisition device, wherein the suspension system component reliability acquisition device has functions such as data processing, data communication and program running. The suspension system component reliability acquisition device can be an integrated controller, a control computer and other devices, and of course it can also be other devices with similar functions, and this embodiment does not limit this.

[0055] It can be understood that the overlap relationship of suspension system components refers to the connection relationship between the components in the suspension system. Due to different types of suspension systems, the overlap relationship of suspension system components includes series overlap relationship and parallel overlap relationship of components. The reliability allocation order refers to the order in which the reliability of suspension system components is allocated.

[0056] It should be noted that the suspension system is the connecting part between the wheel and the vehicle body. Its function is to transmit the force and torque acting between the wheel and the frame, buffer the impact force transmitted from the road surface to the frame or the vehicle body, and reduce the vibration caused thereby, so as to ensure that the vehicle can run smoothly. Therefore, there are many types of suspension structures. This embodiment takes the classic McPherson suspension system as the target to build a block diagram. According to the assembly layout of the components of the McPherson suspension system, the suspension system connection block diagram is established as follows: Figure 3 shown.

[0057] In the specific implementation, the type of suspension system is determined to obtain the corresponding suspension system overlap frame diagram, and then the overlap relationship of the suspension system components is determined based on the suspension system overlap frame diagram. Then, the motion characteristics of the suspension system are sorted out based on the overlap relationship of the suspension system components to determine the reliability distribution order of each component of the suspension system.

[0058] Step S20: determining target component reliability of each component of the suspension system according to the reliability distribution order.

[0059] It can be understood that the target component reliability refers to the component reliability corresponding to the component to be acquired.

[0060] It should be noted that, in order to accurately obtain the target component reliability, further, the target component reliability of each component of the suspension system is determined according to the reliability distribution order, including: determining the component order of the target component according to the reliability distribution order; determining multiple upstream components according to the component order of the target component, and obtaining the upstream component reliability of the multiple upstream components; performing reliability calculation on the upstream component reliability of the multiple upstream components according to the suspension component reliability calculation formula to obtain the target component reliability.

[0061] It can be understood that the target component refers to the component in the suspension system whose reliability is to be obtained, the component order refers to the order in which the target component is allocated its reliability in the suspension system, and the multiple upstream components refer to the first two components in the component order of the target component. For example, if the target component is n, then the upstream components are n-1 and n-2, and the upstream component reliability refers to the component reliability corresponding to each upstream component.

[0062] In a specific implementation, when calculating the reliability of a target component, the reliability distribution order of the target component in the suspension system is first determined, and then the reliability of each upstream component is determined according to the reliability distribution order of the target component. Finally, the reliability is calculated according to the reliability of each upstream component to obtain the target non-intersection reliability.

[0063] It should be noted that in order to accurately obtain the target reliability, further, the reliability calculation of the upstream component reliabilities of multiple upstream components is performed according to the suspension component reliability calculation formula to obtain the target component reliability, including: when the overlap relationship of the suspension system components is a component series overlap relationship, the reliability calculation formula of the component series reliability calculation formula in the suspension component reliability calculation formula is used to calculate the upstream component reliability of multiple upstream components to obtain the target component reliability; when the overlap relationship of the suspension system components is a component parallel overlap relationship, the reliability calculation formula of the component parallel reliability calculation formula in the suspension component reliability calculation formula is used to calculate the upstream component reliability of multiple upstream components to obtain the target component reliability.

[0064] It can be understood that the suspension component reliability calculation formula includes a component series reliability calculation formula and a component parallel reliability calculation formula. According to the different overlapping methods of suspension system components, the reliability calculation formula corresponding to the overlapping method is selected to calculate the component reliability.

[0065] It should be noted that, in order to accurately calculate the reliability of components, further, the component series reliability calculation formula is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability; the reliability calculation formula of the components in parallel is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with decreasing reliability; where R n is the reliability of the nth component in the suspension system, R n-1 is the reliability of n-1 upstream components, R n-2 is the reliability of n-2 upstream components.

[0066] It can be understood that according to the reliability distribution order, the system reliability can be averaged and the system can be kept in two sub-component systems, and the mean value can be continuously eliminated until only one component is left in the system, thereby ensuring that the reliability distribution is always kept above the root mean square value; when the components of the suspension system are connected in series, That is, when there are n components in the basic system, the reliability of its foundation is R basis. Therefore, according to the sorting method, the reliability of its nth sorted component in series is (i=n, n-1, n-2, ┄, 1), where i is the number of remaining components with increasing system reliability; when the components of the suspension system are connected in parallel, That is, when there are n components in the basic system, the reliability of the basic system is R basis. Therefore, according to the sorting method, the reliability of the nth sorted component in parallel is (i=n, n-1, n-2, ┄, 1) where the value of i is the system reliability minus the number of remaining components; according to the series reliability calculation formula and the parallel reliability calculation formula, when calculating the reliability of each component of the suspension system using the above formulas, the number of components in the suspension system must be no less than 3, that is, the suspension system consists of at least three components.

[0067] This embodiment determines the reliability distribution order of each component according to the overlap relationship of the suspension system components; and determines the target component reliability of each component of the suspension system according to the reliability distribution order. The suspension system motion model is determined by the overlap relationship of the suspension system components, and then the motion characteristics of the suspension system are sorted out to determine the reliability distribution order of each component, and then invisible redundancy is introduced into the distribution of the suspension system reliability. Finally, the reliability of each component of the suspension system is obtained, which improves the efficiency of reliability calculation and makes the system reliability closer to the full life design.

[0068] refer to Figure 4 , Figure 4 The figure is a flow chart of a second embodiment of a method for obtaining reliability of suspension system components according to the present invention.

[0069] Based on the first embodiment, the method for obtaining the reliability of suspension system components in this embodiment includes, in step S20:

[0070] Step S21: Determine the invisible redundancy according to the fault perception amount and the fault design amount.

[0071] It can be understood that the fault perception quantity refers to the user's perception level of faults, which can be obtained through calibration or data sampling of users. The fault design quantity refers to the pre-set fault perception quantity design value. The invisible redundancy refers to the redundancy of evaluating system reliability based on the user's perception level of faults.

[0072] Step S22: determining a reliability increment according to the invisible redundancy and a preset failure rate.

[0073] It is to be understood that the preset failure rate refers to a pre-set failure rate.

[0074] It should be noted that, in principle, redundancy is not considered in the design of the suspension structure. However, there is a certain amount of structural redundancy in actual user use. For example, in the fatigue design of an aircraft, the crack expansion rate is mainly considered rather than the initiation of the crack. The full-life reliability design has been incorporated into its reliability design system. Therefore, this embodiment also considers being as close to the full-life design concept as possible, and adopts the introduction of the user's perception level of failure to evaluate the redundancy of system reliability, and introduces this redundancy into the reliability design. The formula introduced is as follows: r = user perception / design quantity, then the reliability increment is: △R = (1-r) * λ, where r is the invisible redundancy, λ is the failure rate, and △R is the reliability increment.

[0075] Step S23: determining a component redundancy reliability calculation formula according to the reliability increment and the suspension component reliability calculation formula, wherein the component redundancy reliability calculation formula includes a series redundancy reliability calculation formula and a parallel redundancy reliability calculation formula.

[0076] It can be understood that the component redundancy reliability calculation formula refers to the suspension system component reliability calculation formula taking redundancy into account, and the component redundancy reliability calculation formula is divided into a series redundancy reliability calculation formula and a parallel redundancy reliability calculation formula according to the overlapping method of the suspension system components.

[0077] It should be noted that, in order to accurately calculate the reliability of components, further, the series redundancy reliability calculation formula is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability; the parallel redundancy reliability calculation formula is: ] (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with decreasing reliability; R is the reliability of the nth component in the suspension system, R n-1 is the reliability of n-1 upstream components, R n-2 is the reliability of the upstream n-2 components, r is the invisible redundancy of the suspension system, and λ is the failure rate of the suspension system.

[0078] In the specific implementation, the load transfer system of the suspension system, i.e., the overlap boundary, can be concluded that the load transfer of the system is a comprehensive system with a series-parallel system. Therefore, when calculating the reliability, it is necessary to timely distinguish the transfer mode of the system and use the appropriate formula to match and solve the reliability of the components. Therefore, the reliability increment and the suspension component reliability calculation formula can be combined to obtain the reliability design target formula of the suspension system: R 设计 =R n -△R, and then the calculation formulas for series redundancy reliability and parallel redundancy reliability are obtained.

[0079] Step S24: determining the target component reliability of each component of the suspension system according to the reliability allocation order and the component redundancy reliability calculation formula.

[0080] In a specific implementation, the order of the target components is determined according to the reliability allocation sequence, and then the reliability is calculated by the component redundancy reliability calculation formula to obtain the reliability of the target component.

[0081] It should be noted that, in order to accurately obtain the reliability distribution order, further, the reliability distribution order of each component is determined according to the overlapping relationship of the suspension system components, including: determining the load transfer path corresponding to the suspension system according to the overlapping relationship of the suspension system components; constructing a load transfer mathematical model according to the load transfer path corresponding to the suspension system, the motion balance relationship of the suspension system and the overlapping relationship of the suspension system components; determining the fatigue relationship of each component of the suspension system according to the load transfer mathematical model; determining the damage ranking method of each component corresponding to the preset fault mode according to the fatigue relationship of each component of the suspension system; determining the reliability distribution order according to the overlapping relationship of the suspension system components and the damage ranking method of each component.

[0082] It can be understood that, in this embodiment, the kinematic relationship of the target system is determined according to the kinematic relationship of the suspension system, thereby determining the load transfer path. According to the Lagrangian equation of motion:

[0083] (i=1, 2, 3┄n),

[0084] The suspension can be regarded as a multi-degree-of-freedom system. Therefore, in the study of reliability, it is necessary to take the motion of all particles into account in order to decompose a reasonable reliability value. After decomposing the Lagrangian motion equation, it can be found that the core of the suspension motion system is the final force balance. Therefore, the motion balance equation of the suspension system can be obtained as: Therefore, according to the motion balance relationship of the suspension system and the system block diagram of the first step, a mathematical model of its load transfer can be established. In this embodiment, a 4-DOF data model is established with a 1 / 4 suspension as the target object to simply and accurately characterize its relationship. The motion diagram of the 4-DOF suspension system is as follows: Figure 5 As shown, then:

[0085]

[0086] Based on the model, we can determine the variables on the load transfer path, and then determine the fatigue damage accumulation level and conversion operations from the variables, including the conversion between damping, stiffness, acceleration, and displacement. Finally, we determine a common variable X as the intermediate quantity for the conversion of quantities, so that we can proceed on the same basis when analogizing the order.

[0087] It should be noted that the fatigue relationship between the components is established based on the first and second steps of the suspension system load transfer characteristics, load key factors, overlap block diagram, response quantity and other parameters to ensure that low fatigue life components under different failure modes on a transfer path can be obtained, and the distribution of system component reliability in the system is established based on the fatigue level. According to the formula:

[0088]

[0089] It can be seen that the damage of system components meets the accumulation principle. Therefore, it is feasible to use the fatigue level of the same load environment to judge the weak links in the system. From this, the relative fatigue order of each component of the system under each failure mode can be obtained, so as to clarify the system increasing order of reliability calculation, as shown in Table 1. According to the statistical analysis of the table, the damage ranking method under a certain type of failure mode can be obtained, n 弹簧 >n 稳定杆 >n 上连接板 >n 减振器 >n 下支座 >n 摆臂 Therefore, when the components are connected in series, the reliability distribution mode should be implemented in the reverse direction, that is, R 摆臂 >R 下支座 >R 减振器 >R 上连接板 >R 稳定杆 >R 弹簧 , and when the systems are connected in parallel, the reliability distribution mode should be implemented in the same direction, that is, R 弹簧 >R 稳定杆 >R 上连接板 >R 减振器 >R 下支座 >R 摆臂 .

[0090] Table 1:

[0091]

[0092] This embodiment determines the invisible redundancy according to the fault perception amount and the fault design amount; determines the reliability increment according to the invisible redundancy and the preset fault rate; determines the component redundancy reliability calculation formula according to the reliability increment and the suspension component reliability calculation formula, and the component redundancy reliability calculation formula includes the series redundancy reliability calculation formula and the parallel redundancy reliability calculation formula; determines the target component reliability of each component of the suspension system according to the reliability allocation order and the component redundancy reliability calculation formula. By considering the user's perception level of the fault to determine the invisible redundancy, and then obtaining the reliability increment according to the invisible redundancy to obtain the component redundancy reliability calculation formula, and finally obtaining the reliability of each component of the suspension system, the rationality of the reliability allocation is ensured, and the reliability of the suspension system is closer to the full life design.

[0093] In addition, an embodiment of the present invention further proposes a storage medium, on which a suspension system component reliability acquisition program is stored. When the suspension system component reliability acquisition program is executed by a processor, the steps of the suspension system component reliability acquisition method described above are implemented.

[0094] Reference Figure 6 , Figure 6It is a structural block diagram of the first embodiment of the device for obtaining reliability of suspension system components of the present invention.

[0095] like Figure 6 As shown, the device for obtaining the reliability of suspension system components proposed in the embodiment of the present invention includes:

[0096] The processing module 10 is used to determine the reliability distribution order of each component according to the overlapping relationship of the suspension system components.

[0097] The acquisition module 20 is used to determine the target component reliability of each component of the suspension system according to the reliability distribution order.

[0098] This embodiment determines the reliability distribution order of each component according to the overlap relationship of the suspension system components; and determines the target component reliability of each component of the suspension system according to the reliability distribution order. The suspension system motion model is determined by the overlap relationship of the suspension system components, and then the motion characteristics of the suspension system are sorted out to determine the reliability distribution order of each component, and then invisible redundancy is introduced into the distribution of the suspension system reliability. Finally, the reliability of each component of the suspension system is obtained, which improves the efficiency of reliability calculation and makes the system reliability closer to the full life design.

[0099] In one embodiment, the acquisition module 20 is further used to determine the invisible redundancy according to the fault perception amount and the fault design amount;

[0100] Determining a reliability increment according to the invisible redundancy and a preset failure rate;

[0101] Determining a component redundancy reliability calculation formula according to the reliability increment and the suspension component reliability calculation formula, wherein the component redundancy reliability calculation formula includes a series redundancy reliability calculation formula and a parallel redundancy reliability calculation formula;

[0102] The target component reliability of each component of the suspension system is determined according to the reliability allocation order and the component redundancy reliability calculation formula.

[0103] In one embodiment, the acquisition module 20 is also used for the series redundancy reliability calculation formula: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability;

[0104] The parallel redundancy reliability calculation formula is: ] (i=n, n-1, n-2, ┄, 1), where i is the number of remaining components of the suspension system with decreasing reliability;

[0105] Wherein, R is the reliability of the nth component in the suspension system, Rn-1 is the reliability of the n-1th upstream component, Rn-2 is the reliability of the n-2th upstream component, r is the invisible redundancy of the suspension system, and λ is the failure rate of the suspension system.

[0106] In one embodiment, the acquisition module 20 is further configured to determine the target component reliability of each component of the suspension system according to the reliability distribution order, including:

[0107] Determining the component order of the target component according to the reliability distribution order;

[0108] determining a plurality of upstream components according to a component order of a target component, and obtaining upstream component reliabilities of the plurality of upstream components;

[0109] The reliability of the upstream components of the plurality of upstream components is calculated according to the suspension component reliability calculation formula to obtain the target component reliability.

[0110] In one embodiment, the acquisition module 20 is further used to perform reliability calculation on the upstream component reliability of the plurality of upstream components according to the suspension component reliability calculation formula to obtain the target component reliability, including:

[0111] When the overlap relationship of the suspension system components is a component series overlap relationship, reliability calculation is performed on the upstream component reliability of multiple upstream components according to the component series reliability calculation formula in the suspension component reliability calculation formula to obtain the target component reliability;

[0112] When the overlap relationship of suspension system components is a component parallel overlap relationship, reliability calculation is performed on upstream component reliabilities of multiple upstream components according to the component parallel reliability calculation formula in the suspension component reliability calculation formula to obtain target component reliability.

[0113] In one embodiment, the acquisition module 20 is also used for calculating the component series reliability formula: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability;

[0114] The calculation formula of the parallel reliability of the components is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with decreasing reliability;

[0115] Among them, Rn is the reliability of the nth component in the suspension system, Rn-1 is the reliability of the n-1 upstream components, and Rn-2 is the reliability of the n-2 upstream components.

[0116] In one embodiment, the processing module 10 is further used to determine the reliability distribution order of each component according to the overlap relationship of the suspension system components, including:

[0117] Determine the load transfer path corresponding to the suspension system according to the overlap relationship of the suspension system components;

[0118] Constructing a load transfer mathematical model according to a load transfer path corresponding to the suspension system, a motion balance relationship of the suspension system, and a lap relationship of components of the suspension system;

[0119] Determining fatigue relationships of various components of the suspension system based on the load transfer mathematical model;

[0120] Determine the damage ranking of each component corresponding to the preset failure mode according to the fatigue relationship of each component of the suspension system;

[0121] The reliability distribution order is determined according to the overlapping relationship of the suspension system components and the damage ranking method of each component.

[0122] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0123] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0124] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0125] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0126] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0127] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0128] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for obtaining reliability of suspension system components, characterized in that: The method for obtaining the reliability of suspension system components comprises: Determine the reliability distribution order of each component according to the overlap relationship of the suspension system components; determining target component reliability of each component of the suspension system according to the reliability distribution order; Wherein, determining the reliability distribution order of each component according to the overlap relationship of the suspension system components includes: Determine the load transfer path corresponding to the suspension system according to the overlap relationship of the suspension system components; Constructing a load transfer mathematical model according to a load transfer path corresponding to the suspension system, a motion balance relationship of the suspension system, and a lap relationship of components of the suspension system; Determining fatigue relationships of various components of the suspension system based on the load transfer mathematical model; Determine the damage ranking of each component corresponding to the preset failure mode according to the fatigue relationship of each component of the suspension system; The reliability distribution order is determined according to the overlapping relationship of the suspension system components and the damage ranking method of each component.

2. The method according to claim 1, characterized in that Determining the target component reliability of each component of the suspension system according to the reliability distribution order includes: Determine the invisible redundancy according to the fault perception amount and the fault design amount; Determining a reliability increment according to the invisible redundancy and a preset failure rate; Determining a component redundancy reliability calculation formula according to the reliability increment and the suspension component reliability calculation formula, wherein the component redundancy reliability calculation formula includes a series redundancy reliability calculation formula and a parallel redundancy reliability calculation formula; The target component reliability of each component of the suspension system is determined according to the reliability allocation order and the component redundancy reliability calculation formula.

3. The method according to claim 2, characterized in that The calculation formula of the series redundancy reliability is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability; The parallel redundancy reliability calculation formula is: ] (i=n, n-1, n-2, ┄, 1), where i is the number of remaining components of the suspension system with decreasing reliability; Wherein, R is the reliability of the nth component in the suspension system, R n-1 is the reliability of n-1 upstream components, R n-2 is the reliability of the upstream n-2 components, r is the invisible redundancy of the suspension system, and λ is the failure rate of the suspension system.

4. The method according to claim 1, characterized in that The step of determining target component reliability of each component of the suspension system according to the reliability distribution order further includes: Determining the component order of the target component according to the reliability distribution order; determining a plurality of upstream components according to a component order of a target component, and obtaining upstream component reliabilities of the plurality of upstream components; The reliability of the upstream components of the plurality of upstream components is calculated according to the suspension component reliability calculation formula to obtain the target component reliability.

5. The method according to claim 4, characterized in that The reliability calculation of the upstream component reliability of the plurality of upstream components is performed according to the suspension component reliability calculation formula to obtain the target component reliability, including: When the overlap relationship of the suspension system components is a component series overlap relationship, reliability calculation is performed on the upstream component reliability of multiple upstream components according to the component series reliability calculation formula in the suspension component reliability calculation formula to obtain the target component reliability; When the overlap relationship of suspension system components is a component parallel overlap relationship, reliability calculation is performed on upstream component reliabilities of multiple upstream components according to the component parallel reliability calculation formula in the suspension component reliability calculation formula to obtain target component reliability.

6. The method according to claim 5, characterized in that The calculation formula for the component series reliability is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with increasing reliability; The calculation formula of the parallel reliability of the components is: (i=n, n-1, n-2, ┄, 1), i is the number of remaining components of the suspension system with decreasing reliability; Among them, R n is the reliability of the nth component in the suspension system, R n-1 is the reliability of n-1 upstream components, R n-2 is the reliability of n-2 upstream components.

7. A device for obtaining reliability of suspension system components, characterized in that: The suspension system component reliability acquisition device comprises: A processing module, used for determining a reliability distribution order of each component according to an overlap relationship of the suspension system components; An acquisition module, used for determining target component reliability of each component of the suspension system according to the reliability distribution order; The processing module is further used to determine a load transfer path corresponding to the suspension system according to the overlap relationship of the suspension system components; Constructing a load transfer mathematical model according to a load transfer path corresponding to the suspension system, a motion balance relationship of the suspension system, and a lap relationship of components of the suspension system; Determining fatigue relationships of various components of the suspension system based on the load transfer mathematical model; Determine the damage ranking of each component corresponding to the preset failure mode according to the fatigue relationship of each component of the suspension system; The reliability distribution order is determined according to the overlapping relationship of the suspension system components and the damage ranking method of each component.

8. A device for obtaining reliability of suspension system components, characterized in that: The device comprises: a memory, a processor, and a suspension system component reliability acquisition program stored in the memory and executable on the processor, wherein the suspension system component reliability acquisition program is configured to implement the steps of the suspension system component reliability acquisition method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a suspension system component reliability acquisition program, and when the suspension system component reliability acquisition program is executed by the processor, the steps of the suspension system component reliability acquisition method according to any one of claims 1 to 6 are implemented.

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