26 July 2004 Experimental validation of a semi-active friction control device
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Abstract
In this paper, the experimental validation of a semi-active vibration reduction strategy is presented where energy is dissipated by dry friction contact surfaces. The aim of this project is to develop a semi-active friction compact device which can be bonded to any light flexible structure. The prototype presented in this paper incorporates two piezoelectric stack actuators used to apply a normal force between a mobile inertial component and two friction pads. This force is controlled so that the distance between the two surfaces is neither too small (to avoid shock and stiction that can cancel the slip between the two surfaces and then the friction effect) or too large (loss of contact surfaces). In order to avoid spillover effects found with the nonlinear control law leading to a bang-bang control, a lead-phase strategy is proposed for the controller. The friction model that was used to develop the controller is first introduced. The parameters of these models are determined experimentally and the friction force obtained from the model is compared with experimental measurements of this force. The piezoelectric stack actuator is then characterized with respect to the friction force generated. The friction model is then used to predict the controller performance for energy dissipation. The implementation of the controller is presented, together with the strategy adopted for the adjustment of the parameters of the controller. Control experiments are conducted on the prototype device and experimental results are presented to assess the performance of the controller.
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Paulin Buaka, Patrice Masson, Philippe Micheau, "Experimental validation of a semi-active friction control device", Proc. SPIE 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems, (26 July 2004); doi: 10.1117/12.540118; https://doi.org/10.1117/12.540118
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