Fuzzy disturbance observer based attitude controller design for spacecraft

2011 ◽  
Author(s):  
Zhi Qiang ◽  
Cai Yuan-li
Keyword(s):  
Disturbance Observer ◽  
Controller Design ◽  
Attitude Controller ◽  
Fuzzy Disturbance Observer

Polynomial Controller Design Using Disturbance Observer

2015 ◽  
Vol 19 (3) ◽  
pp. 439-446 ◽  
Author(s):  
Hugang Han ◽  
◽  
Hak-Keung Lam ◽  
Keyword(s):  
Steady State ◽  
Computer Simulations ◽  
Disturbance Observer ◽  
Controller Design ◽  
Estimation Error ◽  
Fuzzy Model ◽  
Polynomial Controller ◽  
System Controller ◽  
Fuzzy Disturbance Observer

Disturbance observer-based control provides a promising approach to handle system disturbance and improve robustness. In this paper, a new fuzzy disturbance observer (FDO) is proposed into the SOS-based approach, where the polynomial fuzzy model is used to develop the system controller. Compared with other works published so far, the FDO mainly features two things: 1) the estimation error between the FDO and disturbance shrinks asymptotically to zero if the disturbance has a constant steady-state value; 2) parameters involved in the FDO is adjusted on the basis of the polynomial fuzzy model which is basically nonlinear. Finally, computer simulations are provided to illustrate the effectiveness of the proposed approach.

scholarly journals Adaptive Multivariable Super-Twisting Sliding Mode Controller and Disturbance Observer Design for Hypersonic Vehicle

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Wenru Fan ◽  
Bailing Tian
Keyword(s):  
Disturbance Observer ◽  
Controller Design ◽  
Sliding Mode ◽  
Hypersonic Vehicle ◽  
Observer Design ◽  
Sliding Mode Controller ◽  
Finite Time Convergence ◽  
Gain Adaptation ◽  
Chattering Reduction ◽  
Sliding Manifold

A multivariable super-twisting sliding mode controller and disturbance observer with gain adaptation, chattering reduction, and finite time convergence are proposed for a generic hypersonic vehicle where the boundary of aerodynamic uncertainties exists but is unknown. Firstly, an input-output linearization model is constructed for the purpose of controller design. Then, the sliding manifold is designed based on the homogeneity theory. Furthermore, an integrated adaptive multivariable super-twisting sliding mode controller and disturbance observer are designed in order to achieve the tracking for step changes in velocity and altitude. Finally, some simulation results are provided to verify the effectiveness of the proposed method.

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