Tracking differentiator design for the robust backstepping control of a flexible air-breathing hypersonic vehicle
Tracking differentiator design for the robust backstepping control of a flexible air-breathing hypersonic vehicle
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DOI：
10.1016/j.jfranklin.2015.01.014
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发表时间：
2015-04-01
影响因子：
4.1
通讯作者：
Huang, Jiaqi
中科院分区：
文献类型：
--
作者：
Bu, Xiangwei;Wu, Xiaoyan;Huang, Jiaqi
研究了柔性吸气式高超声速飞行器的鲁棒反推控制器设计问题。由于车辆动力学的极端复杂性，只有纵向模型被采用，并重写为反馈形式的反推设计。针对传统反推控制中存在的“项爆炸”问题，设计了一种基于双曲正弦函数的跟踪微分器。此外，为了提高控制器的鲁棒性，一个新的非线性扰动观测器构造使用所提出的TD估计模型的不确定性和变化的干扰。特别地，由于攻角和航迹角在实际中测量困难，本文利用改进的TD方法，根据可测状态对它们进行重构。最后，通过数值仿真验证了该控制策略的有效性. (C)2015年富兰克林研究所。由爱思唯尔有限公司出版。保留所有权利。
This paper is concerned with the robust backstepping controller design for a flexible air-breathing hypersonic vehicle. Due to the extreme complexity of the vehicle dynamics, only the longitudinal model is adopted and rewritten as a feedback form for the backstepping design. Then, a new tracking differentiator (TD) is designed based on hyperbolic sine function to solve the problem of "explosion of term" in the traditional backstepping control. Furthermore, to enhance the controller's robustness, a new nonlinear disturbance observer is constructed using the proposed TD to estimate the model uncertainties and varying disturbances. More specially, owing to the measurement difficulties of angle of attack and flight-path angle in practice, the developed TD is utilized to reconstruct them based on the measurable states. Finally, several numerical simulations are given to demonstrate the effectiveness of the proposed control strategy. (C) 2015 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.