Boundary output feedback control of a flexible spacecraft system with input constraint

2018 ◽  
Vol 12 (5) ◽  
pp. 571-581 ◽  
Author(s):  
Yun Fu ◽  
Yu Liu ◽  
Daoping Huang
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Output Feedback Control ◽  
Flexible Spacecraft ◽  
Input Constraint

Robust nonlinear H∞ output-feedback control for flexible spacecraft attitude manoeuvring

2019 ◽  
Vol 41 (7) ◽  
pp. 2026-2038 ◽  
Author(s):  
Huihui Bai ◽  
Chunqing Huang ◽  
Jianping Zeng
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Attitude Control ◽  
Output Feedback Control ◽  
Lyapunov Stability Theory ◽  
Flexible Spacecraft ◽  
Matrix Perturbation ◽  
External Disturbances ◽  
Convex Optimization Problem ◽  
Control Approach

This paper presents a robust nonlinear H∞ output-feedback control approach for attitude manoeuvring of flexible spacecraft with external disturbances, inertia matrix perturbation and input constraints. By applying Lyapunov stability theory and using the generalized S-procedure and sum of squares (SOS) techniques, the robust H∞ output-feedback attitude control problem is converted into a convex optimization problem with SOS constraints when the flexible spacecraft is modelled as a polynomial state-space equation with polytope uncertainties. As a result, it overcomes the difficulty in constructing Lyapunov function and implementing numerical computation caused by the non-convexity of output-feedback H∞ control design for nonlinear systems. Moreover, it enables the state-observer and the controller to be designed independently and hence the complexity of the control algorithm is reduced remarkably. A numerical example illustrates the effectiveness and feasibility of the proposed approach.

Sign in / Sign up

Export Citation Format

Share Document