Aircraft robustness non-linear control method and robustness controller system

Abstract

The present invention provides an aircraft robustness non-linear control method and a robustness controller system. The method comprises the steps of: designing a nominal control system according to features of an aircraft model, and combining an nth control input instruction to obtain nth error state information, wherein the nth error state information comprises a linear error system and equivalent disturbance; designing a state feedback controller to configure system poles, improving system dynamic response, and obtaining state feedback control input; designing a robustness compensation output control law to inhibit the equivalent disturbance, and obtaining robustness compensation input; employing a dynamic inverse control law to inhibit the nth error state information according to the state feedback control input and the robustness compensation input, and obtaining an (n+1)th control input instruction; and repeatedly executing the steps to obtain (n+1) error state information satisfying an error threshold. The aircraft robustness non-linear control method and the robustness controller system can reduce system conversion, can achieve integrated consideration for a plurality of nondeterminacys, can shorten convergence time of tracking errors and can inhibit the nondeterminacy influences in the whole frequency range.

Description

Technical field [0001] The present invention relates to the field of automation control technology, in particular to a robust nonlinear control method and a robust controller system for an aircraft. Background technique [0002] The high-speed aircraft is an effective platform for approaching adjacent space quickly, reliably and cost-effectively. The failure of the Falcon high-speed aircraft in the taxiing phase of the maneuvering mission in 2011 shows that the robust controller design of the high-speed aircraft is one of the key technical challenges for the feasibility and reliability of the high-speed aircraft. The design principle of robust controller for high-speed aircraft should ensure stability and tracking performance of the closed-loop control system. However, high-speed aircraft dynamics involve strong nonlinearity and strong coupling dynamics between flight dynamics and propulsion systems, as well as many uncertain factors including parameter uncertainties, model mism...

AI Technical Summary

Problems solved by technology

However, the closed-loop system designed by the backstepping control method is difficult to robustly control multiple uncertainties

Combining backstepping and loop-shaping control for robust flight of high-speed vehicles, but unable to suppress the effects of uncertainty on the control system over the entire frequency range

[0004] Many scholars at home and abroad have proposed various methods to design robust controllers, but they have not fully considered the impact of highly nonlinear, strongly coupled dynamics and multiple uncertainties on robust controllers.

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