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Mechanical Considerations for Dynamic Operation of PZTs

How Fast Can a Piezo Actuator Expand?
Fast response is one of the desirable features of piezo actuators. A rapid drive voltage change results in a rapid position change. This property is necessary in applications such as switching of valves/shutters, generation of shock-waves, vibration cancellation systems, etc.

A Piezo can reach its nominal displacement in approximately 1/3 of the period of the resonant frequency with significant overshoot.

Response of a laver amplified Piezo actuator (low resonant frequency) to a rapid drive voltage change.

T_min » f_o/3       (4-13)

Shortest rise time of a piezo actuator (requires an amplifier with sufficient output current and rise time).

For example, a piezo translator with a 10 kHz resonant frequency can reach its nominal displacement within 30 µs. click here for more information "Dynamic Operation (Switched)".

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