Performance evaluation of a fuzzy variable structure satellite attitude controller under sensor data delay

Authors : Performance evaluation of a fuzzy variab Delay

Pages : 517-528

Doi:10.3906/elk-1209-86

View : 13 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :One of the main sources of uncertainties in controlling the attitude of a satellite is the time delays seen in sensor data. Although it is possible to process sensor data to correct the deficiencies caused by delays, it is more suitable to design the controller robust enough to handle uncertainties well. In this study, the attitude of a 3-degrees of freedom satellite model, incorporating uncertainties insert ignore into journalissuearticles values(both sensor data delay and actuator misplacements);, is controlled using a suitably designed fuzzy variable structure controller insert ignore into journalissuearticles values(FVSC);. The performance of the FVSC is evaluated and compared to that of other reference controllers [proportional-derivative insert ignore into journalissuearticles values(PD);, linear-quadratic-Gaussian insert ignore into journalissuearticles values(LQG);, and loop-shaping controllers insert ignore into journalissuearticles values(LSCs);]. The FVSC performs well in both nondelayed and delayed insert ignore into journalissuearticles values(Td = 0.2 s and 0.4 s); cases, while the PD and LQG controllers provide good response only for nondelayed cases insert ignore into journalissuearticles values(i.e. Td = 0 s);. A robust LSC also performs well in both cases, but its root mean squared error is high compared to the FVSC in the delayed case.
Keywords : Actuator misplacement, fuzzy variable structure control, robust loop shaping controller, satellite attitude control, sensor data delay