title: Sliding mode based trajectory linearization control for hypersonic reentry vehicle via extended disturbance observer.
abstract: This paper proposes a novel hybrid control framework by combing observer-based sliding mode control (SMC) with trajectory linearization control (TLC) for hypersonic reentry vehicle (HRV) attitude tracking problem. First, fewer control consumption is achieved using nonlinear tracking differentiator (TD) in the attitude loop. Second, a novel SMC that employs extended disturbance observer (EDO) to counteract the effect of uncertainties using a new sliding surface which includes the estimation error is integrated to address the tracking error stabilization issues in the attitude and angular rate loop, respectively. In addition, new results associated with EDO are examined in terms of dynamic response and noise-tolerant performance, as well as estimation accuracy. The key feature of the proposed compound control approach is that chattering free tracking performance with high accuracy can be ensured for HRV in the presence of multiple uncertainties under control constraints. Based on finite time convergence stability theory, the stability of the resulting closed-loop system is well established. Also, comparisons and extensive simulation results are presented to demonstrate the effectiveness of the control strategy.
authors.affiliation: Unmanned Aerial Vehicle Research Institute, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; Science and Technology on Aircraft Control Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China. Electronic address: huanying3557913@sina.com.
authors.forename: Shao
authors.initials: S
authors.lastname: Xingling
authors.affiliation: Unmanned Aerial Vehicle Research Institute, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; Science and Technology on Aircraft Control Laboratory, Beijing University of Aeronautics and Astronautics, Beijing 100191, China. Electronic address: hl_wang_2002@126.com.
authors.forename: Wang
authors.initials: W
authors.lastname: Honglun
keywords: Control saturation; Extended disturbance observer (EDO); Hypersonic reentry vehicle(HRV); Multiple uncertainties; Observer-based sliding mode control; Trajectory linearization control(TLC)