MULTIPLE CONTROL SURFACE FAILURE DETECTION VIA ON-LINE FILTER TUNING METHOD

摘要

Modern high performance aircraft systems require advanced onboard fault detection, isolation and reconfiguration (FDIR) techniques against system failures. In this paper, we will devise a on-line FDIE (Failure Detection Isolation and Estimation) scheme that could handle multiple and time-varing control surface failure and provide precise health status for future reconfiguration design . This approach combining LQG design with newly developed fuzzy concept would be able to deal with a variety of failure types such as constant failure (hardover) , linearly degraded (run-away) and their combination. A big contribution of this approach is unanticipated failure can be successfully detected without prescribing any nominal failure models in memory.