Adaptive resonance suppressing method for rotary machine

Abstract

The invention aims to provide an adaptive resonance suppressing method for a rotary machine in order to solve the problem of failure of resonance suppressing of the rotary machine possibly caused by the fact that a wave trap resonance suppressing method is poor in real-time performance and cannot identify resonance frequency and work condition change online. According to the method, firstly, mathematical expressions of a fourth-order system, an adaptive law and a wave trap are provided; vibration signals are taken as input, a fourth-order system state equation and the adaptive law are executediteratively, and angular frequency of resonance signals can be tracked dynamically; secondly, after frequency tracking enters a steady state, frequency and amplitude of the resonance signals are calculated according to angular frequency convergency values and state variables; finally, trap frequency is set according to the angular frequency convergency values, front trap processing is performed on current loop given signals, and synchronous component of quadrature-axis current and resonance is inhibited. The method is high in real-time performance and the machine can be inlaid in a motor driver to realize vibration control.

Description

technical field [0001] The invention relates to the technical field of resonance testing and vibration control of a rotating machine, in particular to a method for self-adaptive suppression of the resonance of a rotating machine. Background technique [0002] Due to the problems of large load, large moment of inertia and insufficient coupling stiffness in the rotating mechanical system, there is resonance phenomenon in both gear drive and direct drive, which greatly affects the control accuracy of the system. In the existing vibration suppression methods, the essence of acceleration feedback is to feed back the motor acceleration to the speed loop to increase the moment of inertia of the motor, so as to achieve the purpose of suppressing resonance, but this method relies on an accurate mathematical model. It is also a commonly used vibration suppression method to connect the notch filter into the speed loop control loop and pre-notch the given signal of the current loop to s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a vibration sensor output signal frequency adaptive identification and notch method to solve the problem that the notch resonance suppression method has poor real-time performance, cannot identify the resonance frequency online, and changes in working conditions may lead to failure of the resonance suppression of rotating machinery

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