FREQUENCY CHARACTERISTIC IDENTIFYING METHOD AND DRIVE CONTROLLING APPARATUS

摘要

An instruction value is added to a specific signal to obtain an added signal. Motor is driven based on this added signal. Response of the motor is measured while the motor is being driven. A characteristic value calculated based on the response is compared with a reference value. When the characteristic value is significantly smaller than the reference value, the amplitude of the specific signal is changed so that the characteristic value converges to the reference value. When the characteristic value has almost converged to the reference value, frequency characteristics can be identified accurately.