CAJ | 학술논문

针对以往试验中出现多种模式的结构失效现象，在对新型舵机系统进行可靠性预计时，有必要在传统电子学预计基础上，加入多失效模式下结构可靠性预计。首先，采用专家评分分配法将系统可靠性指标分配到相应模块与组件，然后由元器件计数法、均值一次二阶矩法分别得到电子学部分与各失效模式下结构部分的可靠性指标，进而得到系统的可靠性指标。从预计结果看出，设计方案达到总体分配到舵机系统的可靠性指标要求，在考虑滚珠丝杆机构多失效模式下的可靠度要低于其他电子学部分，与以往试验中结构失效多于电子学部分的现象较为吻合。
침대이왕시험중출현다충모식적결구실효현상，재대신형타궤계통진행가고성예계시，유필요재전통전자학예계기출상，가입다실효모식하결구가고성예계。수선，채용전가평분분배법장계통가고성지표분배도상응모괴여조건，연후유원기건계수법、균치일차이계구법분별득도전자학부분여각실효모식하결구부분적가고성지표，진이득도계통적가고성지표。종예계결과간출，설계방안체도총체분배도타궤계통적가고성지표요구，재고필곤주사간궤구다실효모식하적가고도요저우기타전자학부분，여이왕시험중결구실효다우전자학부분적현상교위문합。
In view of the multiple structure failure modes appeared previously in experiments,we added a structure reliability prediction under multi-failure mode based on the traditional electronics prediction when implementing system reliability prediction to a new type actuator system.Firstly,the Expert Grading Allocation Method was used to allocate system reliability index to the corresponding modules and components.Then,the reliability index of electronic components was obtained by Component Counting Method,and the structure reliability index under each failure mode was obtained by FOSM method.Thus the system reliability index was obtained.The prediction results show that:1 ) The reliability indexes of design scheme achieve the requirement of reliability index allocated for the missile;and 2) The reliability index of ball bearing screw under multi-failure mode is lower than that of the other electronics modules,which is consistent with the previous failure phenomenon in experiments.