%A Ke-wen ZHANG,Bai-song PAN %T Control design of spacecraft autonomous rendezvous using nonlinear models with uncertainty %0 Journal Article %D 2022 %J Journal of ZheJiang University (Engineering Science) %R 10.3785/j.issn.1008-973X.2022.04.024 %P 833-842 %V 56 %N 4 %U {https://www.zjujournals.com/eng/CN/abstract/article_44881.shtml} %8 2022-04-05 %X

An adaptive control strategy based on the general nonlinear relative motion equation was proposed by considering the uncertainty of the spacecraft rendezvous model. A parameterization via adaptive neural networks was implemented for the linear and nonlinear uncertainties in the complex nonlinear system caused by the external disturbances and the orbital parameters of the target spacecraft. Both the backstepping technique and the Lyapunov method were utilized to achieve the control targets and guarantee the asymptotic stability of the resulting closed-loop system. An auxiliary control system was proposed to analyze the effect of input constraints in order to explore the adaptive control design of the spacecraft relative motion in the presence of both model uncertainty and input constraints. The adaptive control strategy proposed for relative motion ensured the stability of the closed-loop system, as well as the uniform ultimate boundedness of the adaptive estimation of the unknown parameters. The effectiveness of the proposed method was verified by the numerical results via the analysis and comparison of different cases.