Fuzzy-logic-based active vibration control of beams using piezoelectric patches

Manu Sharma; S. P. Singh; B. L. Sachdeva

doi:10.1117/12.514637

14 October 2003 Fuzzy-logic-based active vibration control of beams using piezoelectric patches

Manu Sharma, S. P. Singh, B. L. Sachdeva

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514637
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

Abstract

The present work presents a fuzzy logic based controller with a compact rule base, for active vibration control of beams. The controller was implemented experimentally on a test beam and the results were found satisfactory. The test system consists of a cantilevered beam with two piezoelectric patches mounted near its root in collocated fashion. This piezo-beam system was modelled using Finite Element Method. To derive the equations of motion, Hamilton's principle was used. Electro-mechanical interaction of the piezoelectric patch with the beam was modelled using linear constitutive equations for piezoceramics, which relate strain and electric displacement to stress and electric field. The fuzzy logic controller is based on modal velocity of the beam. The basis for generating the fuzzy logic rule base of this controller is obtained from negative velocity feedback control. Modal velocity of the beam acts as an input to the fuzzy controller and actuation force is the output from the inference engine. Linear decay of vibratory amplitude is observed in case of fuzzy logic controller as opposed to logarithmic decay in case of negative velocity feedback control Present controller has just three rules. This is an important achievement because bulky fuzzy logic controllers for active vibration control require fast processors for real time implementation (Kwak and Sciulli and Mayhan and Washington).

Citation Download Citation

Manu Sharma, S. P. Singh, and B. L. Sachdeva "Fuzzy-logic-based active vibration control of beams using piezoelectric patches", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514637

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