Variable structure control of shape memory alloy actuated flexible smart structure

K. Dhanalakshmi; M. Umapathy; D. Ezhilarasi

doi:10.1117/12.716066

13 April 2007 Variable structure control of flexible smart structure with shape memory alloy actuators

K. Dhanalakshmi, M. Umapathy, D. Ezhilarasi

Proceedings Volume 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007; 65281H (2007) https://doi.org/10.1117/12.716066
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

This paper presents the design of reaching law based discrete time sliding mode control for the SMA actuated cantilever beam to suppress the vibration in the presence of external disturbance. A linear dynamic model of the SMA actuated cantilever beam structure is experimentally established using online ARX RLS system identification approach. A digital control system that consists of simulink modeling software and dSPACE 1104 controller board has been used for identification. The VSC controller is designed starting with the switching surface design. The eigen values of the reduced order system are located suitably so that it lies inside the unit circle and the system is stable. The performance of the controller for vibration suppression and disturbance rejection was evaluated through simulation by exciting the structure at resonance.

Citation Download Citation

K. Dhanalakshmi, M. Umapathy, and D. Ezhilarasi "Variable structure control of flexible smart structure with shape memory alloy actuators", Proc. SPIE 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007, 65281H (13 April 2007); https://doi.org/10.1117/12.716066

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