一种故障可诊断性分析方法

介绍了应用结构排除法进行故障诊断时故障的可诊断性,指出了使用(0,1)故障矩阵时有可能出现错误的诊断结果,介绍了计算敏感度矩阵的方法,同时也和(0,1)故障矩阵进行了比较。在设计故障诊断系统时,利用敏感度矩阵,能够针对不同的关系式故障选择最佳检验参数和排除参数的组合,可以提高故障诊断结果的可信度。

A Method for Analysing Sensitivity of Fault

An experimental investigation has been performed and presented in the papaer to clarify the effects of low frequency vibration on the rocket moter performance which occurred a number of times during the active flight period of a missile.Firing tests of a small size motor mounted on a vibration stand simulating low frequency vibration in flight have been conducted.Some problems such as grain structural integrity,motor internal ballistic propereties and insulation erosion have been studied.The preliminary results show that low frequency vibration in flight does not destroy grain structural integrity and does not remarkably affect main motor performances,but burning rate of propellant and ablation rate of insulation in vibration direction are influenced to some extent.The research results can provid some basis for relevant engineering design.