Multi-action sequence mechanism reliability assessment method

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. 本发明提供了种多动作序列的机构可靠性评估方法，通过可靠性评估，能够确定机构系统可靠度、关键的动作序列、关键的因素。该方法主要包括5个步骤：分析机构的动作序列，并依次对每个动作序列，分析运动功能相关的故障模式；依次对每动作序列的故障模式，建立可靠度计算模型；根据动作序列、故障