Open-loop start-up method for a resonating device

摘要

A system employing a resonating device (20) and a controller (31) implements a method involving an establishment by the controller of open-loop oscillations of the resonating device (20) at a resonating frequency of the resonating device (20), and an establishment by the controller (31) of closed-loop oscillations of the resonating device (20) based on the open-loop oscillations of the resonating device (20) at the resonating frequency. To this end, the controller (31) controls an application and a tuning of a first open-loop drive signal to the resonating device (20) based on a design-drive standard resonating frequency range whereby the controller (31) can measure and designate a frequency of a resonating output signal from the resonating device (20) as a calibration resonant frequency, and controls an application and a tuning of a second open-loop drive signal to the resonating device based on the calibration resonant frequency whereby the controller (31) can subsequently apply a closed-loop drive signal to the resonating device (20). <IMAGE>