Multi-action sequence mechanism reliability assessment method

A technology of action sequence and reliability, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as error in analysis results, and achieve the effect of feasible method and strong practical value

Inactive Publication Date: 2018-04-13
中国兵器科学研究院
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Problems solved by technology

Since the action sequences of the mechanism are highly correlated with each other, this is a method of approximate simplification, and there is a large error between the analysis result and the actual situation.

Method used

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  • Multi-action sequence mechanism reliability assessment method

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Embodiment Construction

[0014] The flow chart of the present invention is as figure 1 shown, including the following steps:

[0015] 1 Analyze the action sequence of the mechanism, and for each action sequence in turn, analyze the failure modes related to the motion function, including the occurred and potential failures.

[0016] Firstly, the kinematics analysis of the mechanism is carried out, and the movement of the mechanism is disassembled into multiple action sequences. For example, the artillery ammunition loading mechanism includes action series such as feeding, closing the bolt, locking, firing, unlocking, unbolting, extracting the shell, and ejecting the shell. Using the fault data of the mechanism, the fault data of similar mechanisms, etc., the basic fault modes related to the main movement of each action sequence of the mechanism are analyzed according to the following aspects:

[0017] 1) Motion accuracy faults, such as displacement, speed, acceleration out of tolerance, excessive moti...

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Abstract

The invention provides a multi-action sequence mechanism reliability assessment method. Through reliability assessment, the mechanism system reliability, key action sequences and key factors can be determined. The method mainly comprises the five steps of analyzing action sequences of a mechanism, and for the action sequences, analyzing motion function related fault modes in sequence; for the fault modes of the action sequences, building reliability calculation models; according to relationships between the action sequences and faults, building mechanism system reliability models; by utilizinga covariance function, analyzing correlation among the fault modes of the action sequences; and by utilizing an improved one-time multi-dimensional normal method and considering the correlation of the action sequences, performing mechanism system reliability and sensitivity assessment.

Description

technical field [0001] The invention provides a reliability evaluation method for a mechanism with multiple action sequences, and belongs to the fields of mechanical design and mechanism reliability design. Background technique [0002] The mechanism is the main body of the machine, and the proportion and function of the mechanism in the mechanical equipment such as artillery, robot, and CNC machine tool are increasing. For example, the automatic loading mechanism of a certain artillery ammunition is a high-speed, high-precision, multi-degree-of-freedom special-purpose robotic arm system with many coordinated actions. More than 10 action sequences are required to complete one ammunition loading, such as feeding, closing the latch, locking, firing, Unlocking, unbolting, shell extraction, shell ejection, etc.; there are many types of motion, including translation, rotation, swing, inertial motion, etc.; the motion speed is high, and the average working time of each action is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 刘勤姬广振陈岩钱云鹏李涛涂宏茂郭志明张侦英
Owner 中国兵器科学研究院
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