Title :
Adaptive Wavelet Network Friction Compensation of Inter-Satellite Optical Communication Coarse Pointing Subsystem
Author :
Song, Shenmin ; Song, Zhuoyi ; Zhang, Bintong ; Duan, Guangren
Author_Institution :
Dept. of control Sci. & Eng., Harbin Inst. of Technol.
Abstract :
In order to compensate for the effects of friction in IOC (inter-satellite optical communication) coarse pointing subsystem of PAT (pointing, acquisition, tracking) system, a PD controller is used to obtain a stable trajectory first, then wavelet neural network is used to approximate friction function on line to compensate for it. In addition, a robust term is used to eliminate the effects of approximation error of neural network and external disturbances. The system is proved to be stable and the parameters are proved to be bounded under the control scheme of this paper, using Lyapunov function methods. At last, simulation results show the validity of the control scheme
Keywords :
Lyapunov methods; PD control; artificial satellites; compensation; function approximation; neurocontrollers; optical communication; pointing systems; position control; robust control; wavelet transforms; Lyapunov function methods; PD controller; acquisition system; adaptive wavelet network friction compensation; friction function approximation; intersatellite optical communication; pointing subsystem; pointing system; robust control; stability; tracking system; trajectory; wavelet neural network; Adaptive systems; Communication system control; Control systems; Friction; Neural networks; Optical control; Optical fiber communication; PD control; Robustness; Trajectory; IOC; PAT; friction compensation; wavelet neural network;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1712868
