OPTIMAL PERIODIC CONTROL FOR SPACECRAFT POINTING AND ATTITUDE DETERMINATION

Authors
Citation
Me. Pittelkau, OPTIMAL PERIODIC CONTROL FOR SPACECRAFT POINTING AND ATTITUDE DETERMINATION, Journal of guidance, control, and dynamics, 16(6), 1993, pp. 1078-1084
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Instument & Instrumentation","Aerospace Engineering & Tecnology
ISSN journal
0731-5090
Volume
16
Issue
6
Year of publication
1993
Pages
1078 - 1084
Database
ISI
SICI code
0731-5090(1993)16:6<1078:OPCFSP>2.0.ZU;2-W
Abstract
A new approach to autonomous magnetic roll/yaw control of polar-orbiti ng, nadir-pointing momentum bias spacecraft is considered as the basel ine attitude control system for the next Tiros series. It is shown tha t the roll/yaw dynamics with magnetic control are periodically time va rying. An optimal periodic control law is then developed. The control design features a state estimator that estimates attitude, attitude ra te, and environmental torque disturbances from Earth sensor and sun se nsor measurements; no gyros are needed. The state estimator doubles as a dynamic attitude determination and prediction function. In addition to improved performance, the optimal controller allows a much smaller momentum bias than would otherwise be necessary. Simulation results a re given.