Sliding Mode Controller with Multisensor Data Fusion for Piezo Actuated Structure

J. Arunshankar; M. Umapathy; D. Ezhilarasi

doi:10.14429/dsj.61.1114

J. Arunshankar PSG College of Technology, Coimbatore
M. Umapathy National Institute of Technology, Tiruchirappalli
D. Ezhilarasi National Institute of Technology, Tiruchirappalli

DOI: https://doi.org/10.14429/dsj.61.1114

Keywords: Smart structure, information filter, data fusion, sliding mode controller, piezoelectric sensors, piezoceramics, multisensor data fusion

Abstract

The benefits of multisensor data fusion (MSDF) in controlling the piezo actuated beam structure using sliding mode controller (SMC) has been brought out. The first two vibrating modes of the smart cantilever beamare measured by two sensors namely, piezoelectric sensor and laser displacement sensor. The states are estimated from the sensors outputs using information filter, which were then fused and applied as input to the controller. The controller has been designed from the linear dynamic model of a piezo actuated beam, identified using linear recursive least square (RLS) method based on ARX model. A digital control system consisting of virtual instrumentation software LabVIEW, and USB data acquisition module NI 6008, was used for simulation and real-time control. Improved closed-loop performance was obtained when the controller designed used fused data, as compared to the closed-loop performance obtained with a single sensor. The beam structure considered in this work was a pilot model of the structures used in aerospace applications. Simulation and experimental results presented demonstrate the benefits of data fusion in controlling the vibration modes.

Defence Science Journal, 2011, 61(4), pp.346-353, DOI:http://dx.doi.org/10.14429/dsj.61.1114

Author Biographies

J. Arunshankar, PSG College of Technology, Coimbatore

Mr J. Arunshankar received BTech (Electro. and Instrumentation Engg.)from Bharathiar University, Coimbatore, in 1995, MTech (Process Control and Instrumentation Engg.) from Annamalai University, Chidambaram, in 1998. Currently working as Associate Professor in the Department of Instrumentation and Control Systems Engineering, PSG College of Technology, Coimbatore. He is a Senior Member of The International Society of Automation. His research interests include: Smart structure control and state estimation.

M. Umapathy, National Institute of Technology, Tiruchirappalli

Dr M. Umapathy received his MTech (Precision Engg. and Instrumentation) from the Indian Institute of Technology Madras, Chennai in 1990 and PhD (Systems and Control Engg.) from Indian Institute of Technology Bombay, Mumbai, in 2001. He is currently working as a Professor in the Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli. His research interests include:Smart structure modeling and control, smart materials, MEMS, interval analysis.

D. Ezhilarasi, National Institute of Technology, Tiruchirappalli

Ms D. Ezhilarasi received her BE (Electrical and Electronics Engg) from Madras University, Chennai, in 2000, MTech (Process Control and Instrumentation) from National Institute of Technology, Tiruchirappalli, in 2003. She is currently working as Assistant Professor in the Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli. Her research interests include: System identification and control of smart structures, embedded systems.