Paper Info
Title
Mixed H2/H∞ attitude control of a LEO microsatellite in the presence of inertia matrix uncertainty
Abstract
Owing to a great decrease in size and weight, the pointing of microsatellite is vulnerable to disturbances and the uncertainty of moment-of-inertia variation. Mixed H2/H∞ control, giving consideration to both stability robustness and root-mean-square (rms) performance, is an effective approach for attitude controller design of microsatellites in the face of exogenous disturbances and plant uncertainties. The paper applies a mixed H2/H∞ controller to address a critical condition that during the translation thrusting the attitude of the microsatellite is affected by the unbalanced torque of coupled thrusters and the resulting variation of moment-of-inertia from operation mode switch. By using a linear matrix inequality method, the numerical solution of the mixed H2/H∞ state-feedback controller can be efficiently solved. The results of an integrated test including reaction wheel dynamics prove that the mixed H2/H∞ controller has satisfactory rms performance of pointing control and remarkable robustness to inertia matrix uncertainty by making a compromise between H2 and H∞ costs.
Year
DOI
Venue
2002
10.1109/ACC.2002.1023209
American Control Conference, 2002. Proceedings of the 2002
Keywords
DocType
Volume
H∞ control,artificial satellites,attitude control,control system synthesis,matrix algebra,robust control,state feedback,LEO microsatellite,attitude controller design,coupled thrusters,exogenous disturbances,inertia matrix uncertainty,linear matrix inequality method,mixed H2/H∞ attitude control,moment-of-inertia variation,plant uncertainties,pointing,root-mean-square performance,stability robustness,state-feedback controller,translation thrusting,unbalanced torque
Conference
2
ISSN
ISBN
Citations 
0743-1619
0-7803-7298-0
1
PageRank 
References 
Authors
0.42
0
2
Name
Order
Citations
PageRank
Yun-Ping Sun110.42
Ciann-Dong Yang211.10