Mathematical Models for the Triaxial Attitude Control Testbed

Sangbum Cho, Jinglai Shen and N. Harris Mcclamroch

Mathematical and Computer Modelling of Dynamical Systems, 2003, vol. 9, issue 2, 165-192

Abstract: The Triaxial Attitude Control Testbed has been developed as part of a research program at the University of Michigan on multibody rotational dynamics and control. In this paper, equations of motion are derived and presented in various forms. Actuation mechanisms are incorporated into the models; these include fan actuators, reaction wheel actuators and proof mass actuators that are fixed to the triaxial base body. The models also allow incorporation of unactuated auxiliary bodies that are constrained to move relative to the triaxial base body. The models expose the dynamic coupling between the rotational motion of the triaxial base body, the relative or shape motion of the unactuated auxiliary degrees of freedom, and dynamics associated with actuation mechanisms. Many different model simplifications and approximations are developed. Control models for the triaxial attitude control testbed are formulated that reflect specific assumptions.

Date: 2003
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DOI: 10.1076/mcmd.9.2.165.16520

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