Six-degree-of-freedom motion test of rotor based on shaft disk and its motion parameter decoupling method
A technology of motion parameters and degrees of freedom, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., to achieve the effect of precise decoupling
Active Publication Date: 2020-04-28
DALIAN UNIV OF TECH
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Problems solved by technology
This solves the problem of the universality of the six-degree-of-freedom motion test of the rotor and the precise decoupling of the six-degree-of-freedom motion parameters, and provides motion test and six-degree-of-freedom decoupling methods for precision equipment accuracy evaluation, error compensation and fault diagnosis
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[0030] In order to better illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.
[0031] The goal of this implementation case is to test the six-degree-of-freedom motion of the rotor and decouple the six-degree-of-freedom motion parameters through the shaft disk, displacement sensor and angle encoder.
[0032] The schematic diagram of the relevant parameters of the rotor motion test is as follows: image 3 As shown, the parameter values are shown in Table 1.
[0033] Table 1 Parameters in the rotor motion test scheme
[0034] d D l θ 1
θ 2
θ 3
33mm 114mm 29mm 30° 120° 120°
[0035] The six-degree-of-freedom motion test of the rotor based on the shaft disk and its motion parameter decoupling method, the specific implementation steps are as follows:
[0036] Step 1: Prepare a shaft disk a...
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The invention discloses a six-degree-of-freedom motion test of a rotor based on shaft disc and a motion parameter decoupling method thereof. The method comprises steps that: a high-precision shaft disc test piece and a displacement sensor tool are prepared; the shaft disc test piece is fixedly disposed on the rotor; three measuring points (used for measuring axial movement) are arranged on the disc surface of the shaft disc test piece, two measuring points (used for measuring radial movement) are arranged on a cylindrical surface of a standard shaft, an angle encoder ( used for measuring rotary movement) is arranged on a shaft shoulder, and the accuracy of the measuring positions of the displacement sensor is guaranteed by a tool; a fixed coordinate system and the movable coordinate systemof the shaft disc test piece are established, the measured values of the displacement sensor and the encoder are expressed in a vector manner, and the relation model of the six-degree-of-freedom motion vector of the axis of the shaft disc test piece and the test vector are established; and the six-freedom-degree motion of the axis of the rotor / shaft disc test piece can be solved by taking the discrete measurement data of the displacement sensor and the encoder as known quantities. By adopting the method, each instantaneous six-degree-of-freedom motion of the rotor can be decoupled.
Description
technical field [0001] The invention belongs to the technical field of rotor motion precision testing, and relates to a six-degree-of-freedom motion test of a rotor based on a shaft disk and a motion parameter decoupling method thereof. Background technique [0002] The real motion of the rotor is a key indicator to measure the motion of the transmission system and the quality of power transmission, which directly affects the precision characteristics of precision machine tools, instrument turntables, gear transmissions and other mechanical equipment. The ideal motion of the rotor is a single-degree-of-freedom rotary motion, and the other five degrees of freedom are subject to rigid constraints. However, due to the manufacturing error and elastic deformation of each part, the real motion of the rotor presents a six-degree-of-freedom spatial motion, which needs to pass the motion test and six degrees of freedom. The degree of freedom decoupling method evaluates the precision ...
Claims
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IPC IPC(8): G01M13/025
CPCG01M13/025
Inventor 张楚董惠敏王德伦邱俊
Owner DALIAN UNIV OF TECH