Hypersonic aircraft elevator fault control method

Abstract

The invention provides a hypersonic aircraft elevator fault control method. The hypersonic aircraft elevator fault control method comprises the following steps: a model of jammed faults which happen to an elevator of a hypersonic aircraft is established first according to a longitudinal model of a cruise segment of the hypersonic aircraft; then, a state feedback control law is designed, and matching conditions needed for realizing fault-tolerant control under the condition that a fault mode, magnitude and occurrence time are known are established; then, the situation that an unknown fault happens to the elevator is considered, and an adaptive learning law of controller parameters is derived. According to the hypersonic aircraft elevator fault control method, control output of a normal redundancy elevator can be adjusted quickly and effectively in a self-adaptive mode, so that compensation for control efficacy lost by the elevator which has faults is realized, air safety of the hypersonic aircraft when a certain elevator has faults is guaranteed, and expected performance of the hypersonic aircraft is restored to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a hypersonic aircraft elevator failure control method. Background technique [0002] Hypersonic vehicles are by far the most complex flight process, and have many different flight characteristics compared with subsonic / supersonic vehicles. Due to the large-scale changes in working conditions, the huge difference in the aerodynamic characteristics of hypersonic vehicles at high and low altitudes, and the rapid changes in mass distribution, the dynamic characteristics and model parameters of hypersonic vehicles change significantly during flight. The integrated configuration of the engine and the fuselage makes the elastic fuselage, propulsion system and structural dynamics strongly coupled, resulting in very complex flight dynamics characteristics of hypersonic vehicles and great uncertainty. In addition, due to weight, size and cost constraints, hypersonic ...

AI Technical Summary

Problems solved by technology

The integrated configuration of the engine and the fuselage results in a strong coupling between the elastic fuselage, propulsion system and structural dynamics, resulting in very complex flight dynamics of hypersonic vehicles with great uncertainty

In addition, due to weight, size and cost constraints, hypersonic vehicles are usually equipped with the least combination of control surfaces, and the failure of one control surface often has a devastating effect on the ability of the vehicle to generate the required control torque

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