COMBINED MOTOR DRIVE AND CONTROL DEVICE

摘要

An electronic system comprises a power amplifier (1) with antiphase outputs for driving an actuator/transducer assembly. An error conditioning and converter stage (2) provides input to the power amplifier (1). A transducer excitation function generator (3) provides periodic signals of controlled amplitude and phase for combination with the input signals to the power amplifier (1). An input signal converter circuit (4) transforms the position command supplied to the system to a suitable form for feeding a summation circuit, which derives a position error signal. A pre-amplifier (5) takes the position measurement signal and supplies it to a second input of the summation circuit.