|Intermittent Failure Detection of Multiple Electrical Connectors in EWIS
Shaojie Zhang* and Zhen Cai
International Journal of Control, Automation, and Systems, vol. 15, no. 2, pp.557-566, 2017
Abstract : "Electrical wiring interconnection system (EWIS) of civil aircraft has been paid more attention in recent
years, and intermittent failure detection of electrical connectors in EWIS is a challenging problem. This paper
presents a sliding mode observer (SMO) approach for the intermittent failure detection of an aircraft electrical
system with multiple connector failures. The mathematical model of the aircraft electrical system which contains
multiple connector failures is established for transforming the intermittent failure detection problem into observerbased
multiplicative faults isolation and estimation problems. A set of adaptive sliding mode observers are designed
to locate the failure connectors preliminarily, the observers can adapt the unknown upper bound of the faults.
Furthermore, a fault-reconstruction scheme applying the equivalent output error injection principle is proposed for
fault estimation, where the characteristic parameters of connecters are reconstructed to identify the failures. Finally,
a numerical example is provided to show the effectiveness of the proposed method."
Adaptive sliding mode observer, aviation electrical connectors, fault reconstruction, intermittent failure detection.