Torsional oscillation test error correction method

Abstract

The application discloses a torsional oscillation test error correction method which is suitable for correcting torsional oscillation test errors generated by code disc eccentricity. The torsional oscillation test error correction method comprises steps of installing a preset number of sensors on a preset line segment on the surface of a code disc, wherein the preset line segment is a radius extending line of a rotary shaft; numbering the preset number of sensors according to distances to the center of the rotary shaft from small to large, and recording positional parameters of the sensors except a No.1 sensor; collecting a rotating speed pulse signal of each sensor when the rotary shaft has a stable rotating speed; carrying out order analysis of the collected rotating speed pulse signals to obtain a torsional parameter of each order of each sensor; and placing the torsional parameter of each order of each sensor and the positional parameter of each sensor in a preset formula to obtain a torsional value of each order after correction. As a result, the object of correcting the torsional oscillation test errors generated by code disc eccentricity is achieved.

Description

technical field [0001] The technical field of rotating machinery and signal processing of the present application, more specifically, relates to a method for correcting torsional vibration test errors. Background technique [0002] Torsional vibration is a parameter that reflects the risk of resonance (resonance) in the system. It is mainly related to the moment of inertia and torsional stiffness of each component of the system, that is, to the structural size of the equipment. Torsional vibration widely exists in rotating machinery. Since torsional vibration is highly concealed and harmful, accurate measurement of torsional vibration is particularly important. [0003] At present, the measurement of torsional vibration mainly adopts non-contact measurement, that is, the torsional vibration signal of the system is obtained indirectly by measuring the fluctuation of instantaneous speed (speed pulse signal). The instantaneous speed is an important intermediate quantity in the ...

AI Technical Summary

Problems solved by technology

However, in the process of obtaining the instantaneous speed, it is necessary to artificially install components such as code discs, toothed discs, and reflective paper on the rotating shaft. The position error during the installation of these components will have a great impact on the process of obtaining the instantaneous speed. As a result, there will be a large error in the final torsional vibration value; among them, due to the eccentricity of the code disc, an error occurs in the acquisition of the instantaneous speed, which in turn causes a large error in the final torsional vibration value.

Images