Abstract
The paper investigates that the free vibration for a smart cantilevered beam utilizing actuating and sensing properties of a piezoelectric bimorph is suppressed by a adaptive controller. Through the bimorph, the suppression vibration of a flexible cantilevered beam is studied. Because of uncertain parameters in the dynamic model, a adaptive control is adopted with a minimum variance self-tuning direct regulator to control the free vibration of the smart beam. By some simulation and experiment verifications, the adaptive control is proved to be feasible for attenuating the free vibration of the smart beam.
Highlights
A piezoelectric bimorph, which is consisted of two pieces of piezoelectric patches bonded symmetrically on the top and bottom of a copper electrode beam [1], has been widely used as electroacoustic transducer, energy harvester [2], micropump driver [3] and microrobot for its sensitive response characteristics
In the paper, vibration suppression of a cantilevered beam with a piezoelectric bimorph with uncertain parameters in the dynamic model is investigated with a adaptive control law
A simple and effective control method is required to achieve damping free vibration of the flexible cantilever beam in a shorter time, and the multi-degree-freedom coupling vibration problems of a smart beam with distributed sensors and actuators [6] further are studied in the future
Summary
A piezoelectric bimorph, which is consisted of two pieces of piezoelectric patches bonded symmetrically on the top and bottom of a copper electrode beam [1], has been widely used as electroacoustic transducer, energy harvester [2], micropump driver [3] and microrobot for its sensitive response characteristics. Utilizing a piezoelectric bimorph for concurrent sensing and actuating functions, it is conventional to attenuate free vibration for a cantilevered beam. In the paper, vibration suppression of a cantilevered beam with a piezoelectric bimorph with uncertain parameters in the dynamic model is investigated with a adaptive control law. A simple and effective control method is required to achieve damping free vibration of the flexible cantilever beam in a shorter time, and the multi-degree-freedom coupling vibration problems of a smart beam with distributed sensors and actuators [6] further are studied in the future. A simple adaptive control is adopted with a minimum variance self-tuning direct regulator [7] as fundamental exploration to suppress vibration of a flexible beam with piezoelectric bimorphs. ADAPTIVE VIBRATION CONTROL FOR A CANTILEVERED BEAM USING ACTUATING AND SENSING FUNCTIONS OF A PIEZOELECTRIC BIMORPH.
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