Adaptive tracking control of spacecraft relative motion with mass and thruster uncertainties

Hyungjoo Yoon, Youngho Eun, Chandeok Park

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


This study presents adaptive tracking controls of relative position between two spacecraft in the presence of uncertainties in the thrust alignments and gains, and the active spacecraft's mass. The proposed methods are based on the equations of motion expressed in the general second-order form with trajectory-controllable Hamiltonian systems, which makes it possible to use some useful physical properties in the control law design. Unlike most of the previous works, the control laws are presented not only for the Cartesian coordinates, but also for the spherical coordinates in Keplerian orbits whose dynamic equation is highly complicated but reflects the actual measurement environment (laser/microwave based) and thus is more suitable in real applications. The proposed adaptive algorithms are developed utilizing the smooth-projection algorithm in order to deal with the uncertainties in the actuator model. Numerical simulations show that the proposed adaptive scheme successfully achieves the relative position tracking within a small level of error in the whole process, compared with the non-adaptive scheme.

Original languageEnglish
Pages (from-to)75-83
Number of pages9
JournalAerospace Science and Technology
Issue number1
Publication statusPublished - 2014 Apr

Bibliographical note

Funding Information:
The second and the third authors were supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning ( NRF-2012R1A1A1012351 ).

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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