Experimental and numerical investigation of active vibration control over wide range of operating temperature

In this study, the dynamic response and the active vibration control behavior of cantilever-type structure over wide temperature range (-70°C to 70°C) are investigated experimentally and numerically. A cantilever structure of titanium alloy integrated with the collocated piezoelectric ceramic (PZT-5H) was studied for effective vibration amplitude reduction. The experimental results are verified with the numerical results which show good agreement among them. For the numerical simulations, finite element formulation using first-order shear deformation theory is implemented. The nonlinear fuzzy logic controller is designed as multi-input single-output system using 49 rules and implemented both experimentally and numerically to perform active vibration control. The results show that even moderate fluctuations in the temperature under study can considerably influence the performance of the piezoelectric ceramics used as sensors and actuators resulting in degraded performance for active vibration control.