Fault detection and diagnosis method for smart electrohydraulic actuator

• Main Authors: QIN JIE, REN CHONGTING
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2017
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention relates to a fault detection and diagnosis method for a smart electrohydraulic actuator. The method comprises: when a smart electrohydraulic actuator is in a working state, field input signals including a pressure sensor signal, a displacement sensor signal, a temperature sensor signal, and a liquid level sensor and motion state signal are collected. The method has the following beneficial effects: all faults of an electrohydralic smart (EHS) control system can be detected and diagnosed rapidly and accurately; the automatic control system reliability analysis technology, the fault detection technology, and the artificial intelligence knowledge reasoning determination technology are utilized comprehensively, so that a problem that only a few of people can master the fault detection diagnosis technology can be solved; and thus the user can obtain the real-time healthy state of operation of the whole set of system conveniently and fault spreading and catastrophic event occurrence can be prevented.