Observer-Based Output Feedback Attitude Stabilization for Spacecraft With Finite-Time Convergence

2019 ◽  
Vol 27 (2) ◽  
pp. 781-789 ◽  
Author(s):  
Qinglei Hu ◽  
Boyan Jiang ◽  
Youmin Zhang
Keyword(s):  
Output Feedback ◽  
Finite Time ◽  
Attitude Stabilization ◽  
Finite Time Convergence

Saturated output feedback control for finite-time attitude stabilization of spacecraft

2020 ◽  
Vol 234 (23) ◽  
pp. 4557-4571
Author(s):  
Yuquan Xia ◽  
Yuxin Su
Keyword(s):  
Output Feedback ◽  
Finite Time ◽  
Actuator Saturation ◽  
A Priori ◽  
Output Feedback Control ◽  
Lyapunov Stability Theory ◽  
Attitude Stabilization ◽  
Homogeneous Method ◽  
Finite Time Stabilization ◽  
Attitude Measurements

The finite-time attitude stabilization of spacecraft subject to actuator constraints and attitude measurements only is investigated. A saturated output feedback finite-time proportional-derivative control is proposed. Lyapunov stability theory and homogeneous method are employed to show the finite-time stabilization. Advantages of the proposed control include the finite-time stabilization featuring faster transient and higher precision and the absence of the modelling information and the velocity measurements in the control law formulation, and thus, it offers an easy-going solution for high-quality motion control of spacecraft. An additive feature is that the actuator saturation will not be reached by selecting the control gains a priori. Simulations are presented to illustrate the effectiveness of the proposed control.

scholarly journals Finite-Time Sliding Mode Control Design for Unknown Nonaffine Pure-Feedback Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jun Zhou ◽  
Xianqiang Li
Keyword(s):  
Feedback Control ◽  
Nonlinear Systems ◽  
Sliding Mode Control ◽  
Output Feedback ◽  
Finite Time ◽  
Sliding Mode ◽  
Output Feedback Control ◽  
Finite Time Convergence ◽  
Mode Control ◽  
Control Scheme

A class of unknown nonaffine pure-feedback nonlinear systems is investigated and a novel output feedback control scheme with low complexity is proposed, based on the sliding mode control theory. The scheme is capable of guaranteeing output tracking error with finite-time convergence and bounded closed loop signals. In this scheme, a novel transformation method is included, which can easily transform the state-feedback control of nonaffine systems into output feedback control of strict-feedback affine systems. Based on the transformed affine systems, a novel finite-time sliding mode control is designed, which is continuous and nonsingular. The control scheme proposed in this work is simple and easy to implement, in which the ‘‘explosion of complexity’’ caused by backstepping-like scheme is completely avoided. And the finite-time convergence is successfully achieved. In addition, the scheme is designed based on output feedback control. And the dynamics of the nonaffine nonlinear systems is unknown in the design process. Thus, the system knowledge needed is reduced.

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