Title :
Closed-form methods for on-off control of multi-mode flexible structures
Author :
Singhose, William E. ; Mills, Bart W. ; Seering, Warren P.
Author_Institution :
Dept. of Mech. Eng., MIT, Cambridge, MA, USA
Abstract :
A method is presented for generating on-off command profiles for multi-mode flexible systems. The shape of the command profiles are described by closed-form functions of the system frequencies, actuator force-to-mass ratio, and the desired move distance. The profiles are generated by first cancelling the flexible-body vibration and then accounting for rigid-body requirements. Performance measures of the commands, such as slew duration, fuel usage, peak transient deflection, and robustness to modeling errors are presented and compared to time-optimal commands. The proposed method is demonstrated using a simulation of the Space Shuttle with the Hubble space telescope attached to the remote manipulator
Keywords :
aerospace control; dynamics; flexible structures; manipulators; on-off control; optimisation; Hubble space telescope; Space Shuttle; actuator; closed-form methods; force-to-mass ratio; fuel usage; manipulator; multiple mode flexible structures; on-off control; optimisation; peak transient deflection; slew duration; Acceleration; Actuators; Flexible structures; Fuels; Mechanical engineering; Milling machines; Optimization methods; Shape; Space shuttles; Telescopes;
Conference_Titel :
Decision and Control, 1997., Proceedings of the 36th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4187-2
DOI :
10.1109/CDC.1997.657653
