Resonant frequency online identification and suppression method for servo system

• Main Authors: WANG XIAOHONG, REN LIANXIN, LI YONGSHUN, ZHAI MINGYANG, ZHENG LIKAI, HUANG QISONG, WU CHUNTAI
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2021
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY

The invention discloses a resonant frequency online identification and suppression method for a servo system. The resonant frequency online identification and suppression method comprises the following steps: inputting a rotating speed deviation and setting an initial frequency; obtaining a transfer function according to the structure of the second-order generalized integrator, and calculating an output signal; calculating a frequency error signal, inputting the frequency error signal into a low-pass filter of the frequency-locked loop, and multiplying the output of the low-pass filter by a proportional controller; multiplying the output of the proportional controller by a gain self-adjusting unit, inputting an output value into an integrator, summing the output frequency of the integrator and a set initial frequency to obtain an estimated resonant frequency, and judging whether convergence time is reached or not; and if the convergence time is reached, inputting the estimated resonant frequency into the notc