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FAULT DIAGNOSIS OF DYNAMICAL SYSTEMS BASED ON STATE-SET OBSERVERS

机译:基于状态集观测器的动力系统故障诊断

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This paper shows how state-set observation can be used to detect and identify faults in a dynamical systems with bounded measurement uncertainties. A state-set observer uses the process model and the measured input and output sequence to determine the set of states the process can be in. For diagnosis, a bank of observers is used based on the process models for every fault case. If an observer arrives at an empty set of states, the measured behaviour is inconsistent with the model of the corresponding fault and this fault is known to be not present. The remaining faults form the set of fault candidates. To further distinguish these, fault probabilities are calculated. A method for determining conditional probabilities from the observation sets is developed. This allows to combine the diagnostic strength of state-set observation and stochastic observation.
机译:本文展示了状态集观测如何用于检测和识别具有有限测量不确定性的动力系统中的故障。状态集观察者使用过程模型以及测得的输入和输出序列来确定过程可能处于的状态集。为进行诊断,针对每个故障案例,基于过程模型使用了一组观察者。如果观察者到达一组空状态,则所测量的行为与相应故障的模型不一致,并且已知该故障不存在。其余故障构成一组候选故障。为了进一步区分这些,计算出故障概率。开发了一种用于从观察集中确定条件概率的方法。这允许将状态集观察和随机观察的诊断强度结合起来。

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