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Title: Force feedback versus acceleration feedback in active vibration isolation
Authors: Preumont, Andre 
Francois, Arnaud 
Bossens, Frederic 
Abu Hanieh, Ahmed 
Keywords: Feedback control systems;Tuned mass dampers;Damping (Mechanics);Tactile sensors;Adaptive control systems;Accelerometers;Acceleration (Mechanics)
Issue Date: Oct-2002
Publisher: Elsevier
Source: Preumont, A. Francois, F. Bossens and A. Abu Hanieh, “Force feedback versus acceleration feedback in active vibration isolation”, Journal of sound and vibration, Elsevier, vol. 257 no. 4, pp 605-613, October, 2002
Abstract: This note compares the force feedback and acceleration feedback implementation of the sky-hook damper when it is used to isolate a flexible structure from a disturbance source. It is shown that the use of a force sensor produces always alternating poles and zeros in the open-loop transfer function between the force actuator and the force sensor, which guarantees the stability of the closed-loop. On the contrary, the acceleration feedback produces alternating poles and zeros only when the flexible structure is stiff compared to the isolation system; this property is lost when the flexible modes of the sensitive payload interfere with the isolation system.
Description: Article published in : Journal of Sound and Vibration (2002) 257(4), 605–613 doi:10.1006/jsvi.5047
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