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

Volume

2

fYear

1997

fDate

10-12 Dec 1997

Firstpage

1381

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Decision and Control, 1997., Proceedings of the 36th IEEE Conference on

Conference_Location

San Diego, CA

ISSN

0191-2216

Print_ISBN

0-7803-4187-2

Type

conf

DOI

10.1109/CDC.1997.657653

Filename

657653