scholarly journals Attitude tracking control for variable structure near space vehicles based on switched nonlinear systems

2013 ◽  
Vol 26 (1) ◽  
pp. 186-193 ◽  
Author(s):  
Yufei Wang ◽  
Changsheng Jiang ◽  
Qingxian Wu
Keyword(s):  
Nonlinear Systems ◽  
Tracking Control ◽  
Variable Structure ◽  
Space Vehicles ◽  
Switched Nonlinear Systems ◽  
Near Space ◽  
Attitude Tracking ◽  
Near Space Vehicles ◽  
Attitude Tracking Control

Robust Output Tracking Control for a Class of Uncertain Switched Nonlinear Systems

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Xiao X. Dong ◽  
Jun Zhao
Keyword(s):  
Nonlinear Systems ◽  
Tracking Control ◽  
Control Method ◽  
Design Method ◽  
Average Dwell Time ◽  
Variable Structure ◽  
Linear Matrix ◽  
Switched Nonlinear Systems ◽  
Output Tracking ◽  
Output Tracking Control

This paper is devoted to the problem of robust output tracking control for uncertain cascade switched nonlinear systems with external disturbances. A sufficient condition for the output tracking problem of switched systems to be solvable is given in terms of the average dwell-time scheme and linear matrix inequalities where no solvability of the output tracking control problem for all subsystems is assumed. The controllers are designed based on a variable structure control method in order to conquer the uncertainties. Simulations illustrate the effectiveness of the proposed robust tracking design method.

scholarly journals Second-Order Sliding Mode Disturbance Observer-Based Adaptive Fuzzy Tracking Control for Near-Space Vehicles with Prescribed Tracking Performance

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Bin Fu ◽  
Kang Chen ◽  
Hang Guo
Keyword(s):  
Tracking Control ◽  
Disturbance Observer ◽  
Sliding Mode ◽  
Tracking Performance ◽  
Space Vehicles ◽  
Adaptive Fuzzy ◽  
Near Space ◽  
Sliding Mode Disturbance Observer ◽  
Near Space Vehicles ◽  
Second Order Sliding Mode

An adaptive fuzzy fault-tolerant tracking controller is developed for Near-Space Vehicles (NSVs) suffering from quickly varying uncertainties and actuator faults. For the purpose of estimating and compensating the mismatched external disturbances and modeling errors, a second-order sliding mode disturbance observer (SOSMDO) is constructed. By introducing the norm estimation approach, the negative effects of the quickly varying multiple matched disturbances can be handled. Meanwhile, a hierarchical fuzzy system (HFS) is employed to approximate and compensate the unknown nonlinearities. Several performance functions are introduced and the original system is transformed into one incorporating the desired performance criteria. Then, an adaptive fuzzy tracking control structure is established for the transformed system, and the predefined transient tracking performance can be guaranteed. The rigorous stability of the closed-loop system is proved by using the Lyapunov method. Finally, simulation results are presented to illustrate the effectiveness of the proposed control scheme.

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