Advanced Fault Identification for Safety Critical Electromechanical Actuators

随着在飞机、船舶和汽车中越来越多地转向更多的电力系统，需要确保机电致动器被设计成满足低成本、低体积/重量、高性能和需要很少维护的冲突规范。多用少的设计理念的结论是，电力电子电机驱动器将在更恶劣的环境中工作更长的时间。定期维护周期将更长，因此，驱动器，特别是用于安全关键应用的驱动器，必须采用预测和诊断算法作为其基本控制结构的一部分，以预测和防止运行中的故障。这里提出的工作将调查生产的新签名，用于指示电机驱动器及其负载的条件，并确定如何使用这些签名来确定故障的类型和严重程度。目的是将状态监测嵌入到机电致动器的正常操作中，以检测和区分电机、功率转换器和机械系统中的故障。

With the increasing move to more electric systems in aircraft, ships and automobiles, there is a need to ensure that electromechanical actuators are designed to satisfy the conflicting specifications of low cost, low volume/weight, high performance and requiring little maintenance. The conclusion of the more for less design philosophy is that power electronic motor drives will be work harder, in harsher environments, for longer periods of time. Scheduled maintenance periods will be longer, and therefore it is imperative that drives, especially those used for safety critical applications will employ prognosis and diagnosis algorithms as part of their basic control structure, to predict and prevent in-service failure. The work proposed here will investigate the production of new signatures for indicating the condition of a motor drive and its load, and also determine how these signatures can be used to determine the type and severity of a fault. The aim is to embed the condition monitoring into the normal operation of an electromechanical actuator, in order to detect and distinguish between faults in the electrical machine, the power converter and the mechanical system.