Statistics – Applications
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4327...99l&link_type=abstract
Proc. SPIE Vol. 4327, p. 99-109, Smart Structures and Materials 2001: Smart Structures and Integrated Systems, L. Porter Davis;
Statistics
Applications
Scientific paper
Vibration isolation and precision pointing problems using hexapods have been separately investigated by several groups of researchers. Since many applications require simultaneous vibration isolation and precision pointing (e.g., telescopes, laser communication, and laser weapons), it is particularly useful to do both with a single device. A simultaneous control scheme is developed in this paper using acceleration feedback to provide high-frequency vibration isolation, while Cartesian pointing feedback provides low-frequency pointing. The compensation is divided by frequency because pointing sensors often have a low bandwidth, while acceleration sensors often have a poor low-frequency response. Methods for unifying these finite bandwidth joint and Cartesian controls to perform simultaneous pointing and vibration isolation on a single platform are developed and verified. Experiments on the University of Wyoming hexapods show that this scheme provides a viable control bandwidth.
Hamann Jerry C.
Li Xiaochun
McInroy John E.
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