Formation‐keeping of uncertain satellites using nonlinear damping control

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Published: Oct 7, 2018
Keywords:
Satellite formation keeping orbital control attitude control model uncertainties nonlinear damping control

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T. Wanichanon
Department of Mechanical Engineering, Mahidol University, 25/25 Puttamonthon, Nakorn Pathom 73170. Thailand
F.E. Udwadia
Aerospace and Mechanical Engineering, Civil Engineering, Mathematics, and Information and Operations Management, University of Southern California, Los Angeles, CA, USA
H. Cho
Samsung Techwin Co., Ltd. Power Systems Division, 701 Sampyeong‐dong, Bundang‐gu, Seongnam‐si, Gyeonggi‐do 463‐400, Republic of Korea

Abstract

A formation-keeping control methodology is proposed that includes both attitude and orbital control requirements in the presence of model uncertainties. The approach develops the requisite control in a two-step process. First, a nominal system model that provides our best assessment of the real-life uncertain system is defined, and a nonlinear controller that satisfies the required attitude and orbital requirements of this nominal system is developed. The controller allows the nonlinear nominal system to exactly track the desired attitude and orbital requirements. Since this closed-form controller assumes that the model of the physical system—the nominal system—has no errors or uncertainties, in the second step an additional additive controller that compensates for model uncertainties is developed. The desired trajectory of the nominal system is used as the tracking signal, and a controller based on a generalization of the concept of a nonlinear damping is developed. The resulting closed-form control causes the desired attitude and orbital requirements of the nominal system to be met in the presence of unknown, but bounded, model uncertainties.

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How to Cite
Wanichanon, T., Udwadia, F., & Cho, H. (2018). Formation‐keeping of uncertain satellites using nonlinear damping control. Journal of Research and Applications in Mechanical Engineering, 2(1), 20–33. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/149426
Issue
Vol. 2 No. 1 (2014)
Section
RESEARCH ARTICLES

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