Volume 39, Number 5, October 2021
|Page(s)||995 - 1004|
|Published online||14 December 2021|
Robust dynamic inversion control of flight control system based on L1 adaptive structure
School of Automation, Northwestern Polytechnical University, Xi'an 710129, China
2 Shaanxi Province Key Laboratory of Flight Control and Simulation Technology, Xi'an 710129, China
3 AVIC Chengdu Aircraft Design and Research Institute, Chengdu 610091, China
Nonlinear Dynamic Inversion(NDI) control has excellent rapidity and decoupling ability, unfortunately it lacks the essential robustness to disturbance. From the perspective of enhancing the robustness, an adaptive NDI method based on L1 adaptive structure is proposed. The L1 adaptive structure is introduced into the NDI control to enhance its robustness, which also guarantees the stability and expected dynamic performance of the system suffering from the disturbance influence. Secondly, the flight control law of the advanced aircraft is designed based on the present method to improve the robustness and fault tolerance of the flight control system. Finally, the effectiveness of the flight control law based on the present approach is verified under the fault disturbance. The results showed that the flight control law based on L1 adaptive NDI has excellent dynamic performance and strong robustness to parameter uncertainties and disturbances.
Key words: L1 adaptive structure dynamic inversion control / robustness / stability / projection operator / flight control system / controller design
关键字 : L1自适应动态逆控制 / 鲁棒性 / 稳定性 / 投影算子 / 飞行控制系统 / 控制器设计
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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