Fault estimation method for executing mechanism of integral type aero-engine

Abstract

The invention provides an aero-engine executing mechanism fault estimation method triggered by an integral event, and belongs to the technical field of aero-engine fault diagnosis. According to the method, an integral type event triggering mechanism is combined with a fault observer, a sensor sampling value in an event triggering judgment mechanism is changed into an average value of a period of time from an instantaneous value of a certain moment, and meanwhile, a network transmission delay effect is considered; therefore, the influence of measurement random noise on a fault estimation result can be effectively reduced, and the network communication load is reduced; and finally, verifying the effectiveness of the provided fault estimation and fault-tolerant control method based on the integral type event triggering mechanism by adopting a certain aero-engine control system model.

Description

technical field [0001] The invention belongs to the technical field of aero-engine fault diagnosis, relates to a fault diagnosis method of an aero-engine distributed control system, and in particular to a fault estimation and fault-tolerant control method of an actuator of a control system based on an integral event trigger mechanism. Background technique [0002] Distributed control is an important development direction of next-generation aero-engine control technology following FADEC (Full Authority Digital Electronic Controller). Since a large number of intelligent sensors and intelligent actuators are used in the distributed control system, drift failures are prone to occur in the harsh environment of high temperature and high vibration of the engine. Distributed control is one of the typical networked control methods, and the theoretical research on fault diagnosis and fault-tolerant control of networked control systems has made considerable progress. However, the abov...

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Problems solved by technology

However, the above-mentioned studies on fault diagnosis and fault-tolerant control of aero-engine distributed control systems and networked control systems are mainly concentrated in the field of fault detection and passive fault-tolerant control. Relatively small

The methods used in the current literature do not consider the influence of sensor measurement noise and network delay on the fault estimation results at the same time when performing fault estimation on the actuators of networked control systems such as aeroengine distributed control, which has a certain gap with the actual situation.

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