Title: Experimental evaluation of periodic output feedback control for SMA actuated structures

Authors: K. Dhanalakshmi, M. Umapathy, D. Ezhilarasi, M. Marimuthu

Addresses: Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli 620015, India. ' Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli 620015, India. ' Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli 620015, India. ' Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli 620015, India

Abstract: This paper presents the design and experimental evaluation of periodic output feedback controller to minimise structural vibration of a cantilever beam using shape memory alloy (SMA) wires as control actuators and piezoceramics as sensor and disturbance actuator. Online recursive least square parameter estimation is used to obtain linear dynamic models of the smart cantilever beam. Simulink™ modelling software and dSPACE DS1104 controller board are used for identification and control. The performance of the controller is evaluated experimentally at resonance.

Keywords: shape memory alloys; SMA actuators; smart structures; system identification; active vibration control; periodic output feedback control; structural vibration; cantilever beams; piezoceramics; dynamic modelling.

DOI: 10.1504/IJAMECHS.2010.037099

International Journal of Advanced Mechatronic Systems, 2010 Vol.2 No.5/6, pp.330 - 341

Published online: 25 Nov 2010 *

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