Flight control system collaborative fault diagnosis method with combined connectivity Topology

Abstract

The invention discloses a flight control system collaborative fault diagnosis method with combined connectivity topology. The method comprises the steps that firstly, modeling is carried out on a flight control system, a communication connection relation among aircrafts in the flight control system is constructed by using a graph theory and a state space expression, the communication connection relation is represented with an undirected switching topology graph, corresponding topological description matrixes L and G are calculated, wherein the G is a circuit matrix, and the L is a laplacian matrix; secondly, for a constructed flight control system model, a combined connectivity topology structure is considered, and a fault estimation observer based on a relative output estimation error isconstructed; then a global estimation error equation of the flight control system is obtained through theory deduction, a parameter of the observer is calculated based on a Lyapunov method and a linear matrix inequation, and stability validation is carried out on the global estimation error equation. According to the flight control system collaborative fault diagnosis method with the combined connectivity topology, when the system breaks down, the observer can achieve the detection and reconstruction of fault in shorter time.

Description

technical field [0001] The invention belongs to the technical field of flight control systems, and in particular relates to a collaborative fault diagnosis method for a flight control system with a joint connection topology. Background technique [0002] Aircraft has great military value and extensive civil application prospects, and has always been the focus of research in countries all over the world. With the development of modern science and technology, the integration of mechanical and electronic equipment used in aircraft is getting higher and higher, and it has the characteristics of complex operating environment, large flight altitude and speed span, etc., and the aircraft is prone to failure during operation. System failure may cause major economic losses and life safety issues. The increase in system complexity has brought higher requirements for reliability and safety. In recent years, fault diagnosis technology has become one of the hottest research directions i...

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Problems solved by technology

With the development of modern science and technology, the integration of mechanical and electronic equipment used in aircraft is getting higher and higher, and it has the characteristics of comp

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