Unbalance Compensation Method for Rotor Unbalance Coefficient Variable Step Polygon Iterative Search

Abstract

The invention discloses an unbalanced compensation algorithm of polygonal iterative search with variable step size for rotor imbalance coefficients. The algorithm comprises the steps that in the step of signal processing, identification and compensation output of unbalanced coefficients, the signal processing is based on the rotor vibration signal and the rotor speed obtained by a displacement sensor and the rotor speed and phase signals obtained by a phase detection device, the amplitude values of the fundamental frequency of rotor vibration signals are obtained by calculation; the amplitude values of the fundamental frequency of rotor vibration signals are used as the judgment criterion for the identification of unbalanced coefficients, unbalance coefficients are obtained through the identifications by the polygon iterative search method with variable step size; unbalanced compensation electric currents are generated by the compensation output based on the unbalanced coefficients, and inputted in electromagnetic coils, then suppression is conducted on the rotor imbalance vibrations. The unbalanced compensation algorithm of polygonal iterative search with variable step size for rotor imbalance coefficients can be applied to active rotor systems with active control units, online compensation of the imbalance of the active rotor system is achieved, so that suppression is conducted on unbalanced vibration of the rotor system of the entire rotor speed range in the acceleration and deceleration operation process.

Description

technical field [0001] The invention relates to a compensation algorithm used in an active rotor system, in particular to an unbalance compensation algorithm for polygonal iterative search with variable step size of the unbalance coefficient of the rotor. Background technique [0002] There is always a certain deviation between the mass center and the geometric center of the rotor due to uneven material, machining error, deformation, etc. This deviation is called the residual unbalance distance. During the rotation of the rotor, the residual unbalance of the rotor will generate an unbalanced excitation force with the same frequency as the rotational speed, causing the rotor to vibrate. The unbalanced vibration is transmitted to the base through the bearing, which will cause equipment damage in severe cases. Different from the traditional rotor system, the active rotor system with an active control unit, such as the active electromagnetic bearing rotor system, can apply a co...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the existing active rotor system in high-precision control of rotor displacement, especially to solve the problem of unbalanced vibration control in the entire speed range, the present invention provides an unbalanced compensation for rotor unbalanced coefficient variable step size polygon iterative search Algorithm, through online identification of the rotor unbalance coefficient, active compensation for the unbalance of the active rotor system, in order to achieve the suppression of unbalanced vibration in the entire speed range

[0007] In order to overcome the deficiencies of the existing active rotor system in high-precision control of rotor displacement, especially to solve the problem of unbalanced vibration control in the entire speed range, the present invention provides an unbalanced compensation for rotor unbalanced coefficient variable step size polygon iterative search Algorithm, through online identification of the rotor unbalance coefficient, active compensation for the unbalance of the active rotor system, in order to achieve the suppression of unbalanced vibration in the entire speed range

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