Fault detection and diagnosis method for smart electrohydraulic actuator

Abstract

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.

Description

technical field [0001] The invention relates to the field of fault detection and diagnosis of a control system, in particular to a fault detection and diagnosis method of an intelligent electro-hydraulic actuator. Background technique [0002] With the continuous improvement of automation control level, the complexity of the system increases rapidly, and users urgently need to improve the reliability and maintainability of the control system. A new path. Fault diagnosis technology is constantly improving, and its application fields are also expanding. From the first aerospace, aviation has gradually expanded to various fields. The fault detection and diagnosis applied to the automatic control system has its special requirements: it should be able to ensure a very low misdiagnosis rate and missed diagnosis rate; it can perform fault diagnosis in time based on complete and incomplete information; it can be rapid, effective and reliable. Draw fault detection and diagnosis con...

AI Technical Summary

Problems solved by technology

However, in practical applications, there is a lack of corresponding fault detection and diagnosis methods for intelligent electro-hydraulic actuators, which cannot meet actual production needs.

Images