Publication: Characterization of piezoelectric patch and its application to the active vibration suppression for cantilever beam
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Date
2019-08
Authors
Mohd Hafiz Abdul Satar
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Abstract
Piezoelectric is a versatile material where it can be used either as actuator or sensor in many application due to the mechanical and electrical energy conversion. However, the piezoelectric performance is limited by its non-linear characteristics. These characteristics are widely studied but less explored especially involving all the four non-linearity effects (hysteresis, saturation, creep and uncertainty vibration). Thus, this study aims to characterize all four non-linear characteristics of the piezoelectric patch as sensor and actuator and its application to active vibration suppression (AVS) system for a cantilever beam. Then, the piezo is applied on the AVS system to study the performance in three different parameters (frequency independent, controller tuning methods and sine swept). From the study, the result shows that, the hysteresis saturation and uncertainty vibration were significantly found in the actuator and sensor characterizations, while the creep was clearly observed in actuator application. In overall, these four non-linear characteristics were getting worse as the operating frequency and input voltage were higher. At different operating frequencies of AVS, the uncertainty vibration reduction was increased linearly except at 500 Hz. The
proportional gain step-up (PGS) was the best tuning method for the AVS system. The frequency dependent study also shown good performance of vibration reduction within
the range of 26 Hz to 245 Hz. The main contribution of this study is the characterization of all four piezoelectric non-linear characteristics and its application
on the AVS system which shown a significant vibration reduction.