Attitude control of flexible space structures using extended state observer

Bagus Mahawan; Zheng-Hua Luo; Jing-Qing Han

Bagus Mahawan Dynax Corporation
Zheng-Hua Luo Dynaservo Inc.
Jing-Qing Han Chinese Academy of Sciences

Abstract

In this paper, we construct a nonlinear Extended State Observer (ESO) to estimate the dynamics of linear or nonlinear systems with parameter uncertainties and unknown external disturbances. We then apply ESO to the high-precision attitude control of a flexible satellite whose dynamics are unknown. Simulation results demonstrate the usefulness of the proposed control method.

Keywords

attitude control, extended state observer, flexible satellites,

References

[1] S. Battilotti, S. Di Gennaro, L. Lanari. Output feedback stabilization of a rigid spacecraft with unknown disturbances. Proc. of the 34th Conference on Decision and Control, Orlando, Florida, 916-920, 1994.
[2] Y. Chida, Y. Yamaguchi, H. Soga, T. Kida, I. Yamaguchi, T. Sekiguchi. On-orbit attitude control experiments for ETS-V1. Proc. of the 35 Conference on Decision and Control, Kobe, Japan, 486-488, 1996.
[3] Y. Chida, T. Kida, T. Sekiguchi. Attitude control experiments of ETS-VI using I-PD and two-degree-of-freedom H∞ control (in Japanese) . Journal of Systems, Control, and Information, 42(11): 591- 598, 1998.
[4] J.Q. Han. Auto disturbance rejection controller. Proc. of 2nd Asian Control Conference, Seoul, III: 567- 570, 1997.
[5] H. K. Khalil. Nonlinear Systems. Prentice Hall, New Jersey, 1996.