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Finite-time sliding mode attitude control for a reentry vehicle with blended aerodynamic surfaces and a reaction control system

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Chinese Journal of Aeronautics 2014年第4期27卷 964-976页

作者： Geng Jie Sheng Yongzhi Liu Xiangdong Key Laboratory for Intelligent Control&Decision of Complex Systems Beijing Institute of Technology School of Automation Beijing Institute of Technology

This paper proposes a finite-time robust flight controller, targeting for a reentry vehicle with blended aerodynamic surfaces and a reaction control system（RCS）. Firstly, a novel finite-time attitude controller is pointed out with the introduction of a nonsingular finite-time sliding mode manifold. The attitude tracking errors are mathematically proved to converge to zero within finite time which can be estimated. In order to improve the performance, a second-order finite-time sliding mode controller is further developed to effectively alleviate chattering without any deterioration of robustness and accuracy. Moreover, an optimization control allocation algorithm, using linear programming and a pulse-width pulse-frequency（PWPF） modulator, is designed to allocate torque commands for all the aerodynamic surface deflections and on–off switching-states of RCS *** are provided for the reentry vehicle considering uncertain parameters and external disturbances for practical purposes, and the results demonstrate the effectiveness and robustness of the attitude control system.

关键词： chattering alleviation Control allocation Finite-time convergence Flight control systems Second-order sliding mode Singularity elimination Sliding mode control

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Second-Order Time-Varying Sliding Mode Control for Uncertain Systems

Second-Order Time-Varying Sliding Mode Control for Uncertain...

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第25届中国控制与决策会议

作者： Jie Geng Yongzhi Sheng Xiangdong Liu Bing Liu School of Automation Beijing Institute of Technology Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education

ISBN: (纸本)9781467355339

A novel second-order time-varying sliding mode control（SOTVSMC） law is proposed for the robust tracking control problem of nonlinear smooth single-input single-output（SISO） system with disturbance. The advantages of the proposed SOTVSMC are twofold. The global second order sliding mode is established, which implies that the closed-loop system is global robust against matched parameter uncertainties and disturbances. Meanwhile, the chattering problem is significantly alleviated. Then the parameter of the sliding mode is obtained by solving an optimal problem. Finally, the effectiveness and robustness of the control strategy is demonstrated by simulation results.

关键词： Sliding Mode Control Nonlinear Systems Global Second Order Sliding Phase chattering alleviation

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Finite-Time Control Based On The Time-Varying Sliding Mode For Spacecraft Body-Fixed Hovering Over an Asteroid 36

Finite-Time Control Based On The Time-Varying Sliding Mode F...

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第36届中国控制会议

作者： Jinsong Zhao Yongzhi Sheng Xiangyuan Zeng Zhirong Lei School of Automation Beijing Institute of Technology School of Automation Northwestern Polytechnical University

ISBN: (纸本)9781538629185

This paper investigates a finite time control for spacecraft hovering in highly uncertain dynamical environments,typically found around *** control method is based on the time varying second order sliding mode ***,feedback linearization is exploited to transform the dynamic equations for spacecraft into three independent second order uncertain ***,a simplified model of the natural elongated body is introduced to describe its gravitational *** proposed control scheme for the hovering maneuvers is proved with a stability ***,numerical simulations are performed to evaluate the effectiveness of the proposed control scheme.

关键词： Hovering spacecraft Finite-time convergence High-order sliding mode chattering alleviation Sliding mode control

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