A high-precision whiskbroom scanner control system, which is used on earth observation satellites, is discussed. This control system is required to keep high angular precision with ultra-smooth rotation. We designed a feedback control system consisting of a rate loop for rotation-speed control and a position loop for angular control. Adding a feedforward control system using cyclic memory, 1st order rotational synchronizing disturbance caused by eccentric load has been compressed over 50 dB. As a result, high pointing accuracy with a standard deviation of 0.003 degree or less has been achieved in rotating with a constant speed of 79.4 rpm.

Date Published: 13 October 2010
PDF: 9 pages
Proc. SPIE 7826, Sensors, Systems, and Next-Generation Satellites XIV, 78261E (13 October 2010); doi: 10.1117/12.864676

Published in SPIE Proceedings Vol. 7826:
Sensors, Systems, and Next-Generation Satellites XIV
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)