Aircraft control system fault compensation and disturbance suppression method based on self-adaptation

Abstract

The invention provides an aircraft control system fault compensation and disturbance suppression method based on self-adaptation. The aircraft control system fault compensation and disturbance suppression method comprises the following steps of acquiring an interference item and a fault item influencing an aircraft control system; respectively establishing an interference model and a fault model according to the interference item and the fault item; establishing a dynamic model influencing the input of the aircraft control system according to the interference model and the fault model; designing a basic controller according to the dynamic model; respectively designing adaptive controllers based on the fault modes; and designing an integrated controller based on adaptive weighted fusion. According to the invention, when gust disturbance and unknown actuator faults occur in the aircraft control system, gust disturbance is effectively suppressed, faults are compensated, so that the aircraft control system is ensured to have expected closed-loop stability and output tracking performance, a target can be stably and progressively tracked and controlled, the fault-tolerant control effectis improved, and the flight safety of the aircraft is ensured.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an adaptive-based aircraft control system fault compensation and disturbance suppression method. Background technique [0002] With the development of science and technology, some new performance-critical application systems with large-scale system dynamics have emerged, such as aerospace vehicles, nuclear reactors, micro-electromechanical systems, and smart grid systems. The structure of these new systems has the characteristics of large working range, complex system dynamic range, and many components, which make them extremely vulnerable to the influence of the external environment. Among them, the influence of uncertain external environment on the system can be characterized by many uncertain external disturbances, such as unfavorable airborne conditions such as gusts, turbulence, and freezing in the aerospace field. Usually, these uncertain external disturbances ma...

AI Technical Summary

Problems solved by technology

With the rapid development of performance-critical systems represented by aircraft, the system model is more complex, and its characteristics such as nonlinearity, multi-variables, strong coupling, and uncertainty become more prominent. These factors make the existing control theory and technology unable to meet The requirements for safe flight of aircraft urgently require new control theories and methods to improve the safety and reliability of the control system, so as to effectively avoid catastrophic accidents and major economic losses

[0003] Although a lot of feasible progress has been made in the research of actuator fault compensation for flight systems, there are still many open problems, especially the control problem without considering the actual unknown mismatch disturbance and multiple uncertain actuator faults.

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