Title :
Control of gimbal dynamics via sensitivity models for uncertainty in friction parameters
Author :
Schoenwald, D. ; Özgüner, Ü ; Graham, R.
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
Tracking control of the beta gimbals for the solar array panels on the space station Freedom is investigated. In particular, the issue of control in the presence of uncertainty in motor friction parameters is addressed. The impact of parametric uncertainty on gimbal performance is analyzed by incorporating sensitivity functions in the feedback loop to desensitize the gimbal control law to parameter variations. The simulation results indicate that the inclusion of one particular sensitivity function yields some improvements in closed-loop performance when friction parameters are varied from their nominal values
Keywords :
aerospace control; attitude control; feedback; sensitivity; solar cell arrays; space vehicle power plants; tracking systems; beta gimbals; closed-loop performance; feedback loop; friction parameter uncertainty; gimbal dynamics control; motor friction parameters; parametric uncertainty; sensitivity models; solar array panels; space station Freedom; tracking control; Actuators; Angular velocity; Feedback loop; Friction; Motor drives; NASA; Optimal control; Performance analysis; Space stations; Uncertainty;
Conference_Titel :
Control Applications, 1992., First IEEE Conference on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-0047-5
DOI :
10.1109/CCA.1992.269899
