Simultaneous Optimization of Damping and Tracking Controller Parameters Via Selective Pole Placement for Enhanced Positioning Bandwidth of Nanopositioners

Published on Oct 1, 2015in Journal of Dynamic Systems Measurement and Control-transactions of The Asme1.372
路 DOI :10.1115/1.4030723
Douglas Russell4
Estimated H-index: 4
(Aberd.: University of Aberdeen),
Andrew J. Fleming45
Estimated H-index: 45
(University of Newcastle),
Sumeet S. Aphale14
Estimated H-index: 14
(Aberd.: University of Aberdeen)
Sources
Abstract
Positive Velocity and Position Feedback (PVPF) is a widely used control scheme in lightly damped resonant systems with collocated sensor actuator pairs. The popularity of PVPF is due to the ability to achieve a chosen damping ratio by repositioning the poles of the system. The addition of a necessary tracking controller causes the poles to deviate from the intended location and can be a detriment to the damping achieved. By designing the PVPF and tracking controllers simultaneously, the optimal damping and tracking can be achieved. Simulations show full damping of the first resonant mode whilst also achieving bandwidth greater than the natural frequency of the plant, allowing for high speed scanning with accurate tracking.
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