Flight control system executor deadlock trouble real-time detection method

Abstract

A real-time detection method for executor blocking fault in a flight control system pertains to flight control system field. The invented method uses a multi-model structure to build a set of observers UIOs each of which is based on a system model for describing a specific executor fault, UIOs are used for generating residual error signals depending on faults, UIO of a model matching with the system generates a residual error signal close to zero, and each UIO of a model mismatching with the system generates a big residual error signal driven by the mismatch signal. Aiming at unknown model parameter caused by that the executor blocking position can not be predicted, fault detection is implemented by using a model with a model of an uncertain parameter to online approach the executor blocking parameter by self-adaptation adjustment, to make the UIO model to match with the system status.

Description

technical field [0001] The invention relates to the technical field of flight control systems, in particular to a real-time detection method for actuator stuck faults in the flight control system. Background technique [0002] The reliable operation of the flight control system is the premise of the flight safety of the aircraft. In order to make the flight control system have fault tolerance in case of failure, modern aircraft usually adopt hardware redundancy, that is, multiple sets of hardware devices such as controllers, sensors and actuators are repeated in parallel. The disadvantage of hardware redundancy is Due to space and load limitations on small aircraft, especially unmanned aerial vehicles, it is necessary and promising to use fault diagnosis technology based on analytical analysis or artificial intelligence methods. When the flight control system adopts fault-tolerant control technology, the rapid detection and accurate location of faults provide a good foundat...

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Problems solved by technology

In the document "Y. Zhang and J. Jiang, Active fault-tolerant control system against partial actuator failures, IEE Proceedings-Control Theory Applications, Vol.149, No, 1, January 2002, pp.95-104", the author proposed A method can handle partial failure faults in a continuous parameter manner, but no effective method has been proposed for the stuck actuator case

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