Piezo actuator insuling pump1/22/2024 It is shown that damping with a combination of a resistor and an inductor can theoretically be even better. This optimal resistance causes maximal damping of the primary resonance of the piezo. Using this theory, an value of damping resistance is readily identified. The theory is based on a purely electronic model, and uses an electrical-mechanical transformation to describe actual piezo displacements. In this paper a comprehensive theory is presented which describes these piezo resonances, and the mechanism by which these resonances are minimized by adding electrical damping components. These resonances can be minimized by using resistive or resistive-inductive damping. The mechanical damping of the piezo actuator needs to be included in the theory to obtain a good fit with the electrical and mechanical behavior of an actual piezo actuator.Ībstract = "Piezo actuators have very desirable properties, such as a high stiffness and extreme position resolution, but suffer from electromechanical resonances that complicate their use in high-speed applications. An optical displacement setup was developed, and frequency- and time-domain measurements were performed that validate the theory. Using this theory, an ‘optimal’ value of damping resistance is readily identified. Piezo actuators have very desirable properties, such as a high stiffness and extreme position resolution, but suffer from electromechanical resonances that complicate their use in high-speed applications.
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