Extended state observer based control for generic hypersonic vehicles with nonaffine-in-control character

Shen Zhang; Qing Wang; Chaoyang Dong

doi:10.1016/j.isatra.2018.05.020

Extended state observer based control for generic hypersonic vehicles with nonaffine-in-control character

ISA Trans. 2018 Sep:80:127-136. doi: 10.1016/j.isatra.2018.05.020. Epub 2018 Jun 7.

Authors

Shen Zhang¹, Qing Wang², Chaoyang Dong³

Affiliations

¹ School of Automation Science and Electrical Engineering, Beihang University, Beijing, China. Electronic address: zhangshen@buaa.edu.cn.
² School of Automation Science and Electrical Engineering, Beihang University, Beijing, China.
³ School of Aeronautic Science and Engineering, Beihang University, Beijing, China.

PMID: 29885738
DOI: 10.1016/j.isatra.2018.05.020

Abstract

This paper investigates the flight control problem of generic hypersonic vehicles subject to nonaffine-in-control character. Considering the large uncertainties and external disturbance, the disturbance observer based control strategy is incorporated in the control scheme. Firstly, an extended state observer is used to estimate the system states and the total disturbance. Then, based on the output of the extended state observer, we follow the backstepping design procedure. The dynamic inversion method is involved in the last step of backstepping to solve the nonaffine-in-control problem. The proposed control scheme ensures that the hypersonic vehicle tracks the command signal with almost no aerodynamic knowledge. Rigorous stability proof is given based on the separated time-scale structure of the extended state observer and the dynamic inversion method. At last, numerical simulations are presented in different conditions to demonstrate the effectiveness and good tracking performance of the proposed control scheme.

Keywords: Dynamic inversion; Extended state observer; Hypersonic vehicle; Nonaffine-in-control character.