Low-frequency and large-displacement angular vibration table

An angular vibration table, large displacement technology, applied in vibration testing, testing of machine/structural components, instruments, etc., can solve the problems of small output angular displacement and large output waveform distortion.

Active Publication Date: 2014-12-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantage that the existing motor-driven angular vibrating table can output a large angular displacement, but the output waveform distortion is large; and the electromagnetic-driven angular vibrating ta

Method used

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  • Low-frequency and large-displacement angular vibration table
  • Low-frequency and large-displacement angular vibration table
  • Low-frequency and large-displacement angular vibration table

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] refer to Figure 1-6

[0057] like figure 1 As shown, a low-frequency large-displacement-angle vibrating table includes a housing, a worktable B-1, a spindle B-2 that drives the worktable B-1 to rotate, a moving coil assembly, a magnetic circuit assembly, a motor that drives the magnetic circuit assembly to rotate, and Its closed-loop control components, electro-viscoelastic feedback control components, air bearings and angular displacement sensors;

[0058] The main shaft B-2 is fixedly connected with the moving coil assembly, and the motor rotor E-6 is fixedly connected with the magnetic circuit assembly through the connecting piece;

[0059] The moving coil assembly includes a moving coil base B-3 connected to the main shaft B-2 and a coil B-4 wound on the moving coil base B-3, and the moving coil base B-3 is fixedly connected to the main shaft B-2;

[0060] The magnetic circuit assembly includes the magnetic ring E-1, the central magnetic pole E-2 and the magneti...

Embodiment 2

[0079] The difference between this embodiment and the first embodiment lies in the specific structure of the air bearing, and the structure of other components except the air bearing is the same as that of the first embodiment.

[0080] Specifically: if Figure 7 As shown, the air bearing includes bearing seat C-1 and bearing body C-2, the main shaft B-2 is socketed in the bearing body C-2, the bearing body C-2 is socketed in the bearing seat C-1, and the bearing seat C -1 is fixed with the bearing body C-2, and the bottom of the main shaft B-2 is provided with a step matching with the bearing body C-2;

[0081] The outer surface of the bearing body C-2 is provided with a circular air intake groove C-21, and the bearing seat C-1 is provided with an air intake hole C-11 communicating with the air intake groove C-21, and the bearing body C -2 is provided with the radial air guide hole between the bearing body C-2 and the main shaft B-2, which guides the gas to the upper axial a...

Embodiment 3

[0092] refer to Figure 8 , 9 、10

[0093] The difference between this embodiment and Embodiment 1 lies in the coil of the moving coil assembly, and the structure of other components except the coil is the same as that of Embodiment 1.

[0094] like Figure 8 As shown, the coil B-4 of the moving coil assembly covers the outer surface of the moving coil base B-3. like Figure 9 As shown, the coil includes a coil winding B-4-1 and an insulating layer B-4-3, the coil winding B-4-1 and the insulating layer B-4-3 are arranged at intervals, and the coil winding B-4-1 has at least one layer , the insulating layer B-4-3 is made of epoxy resin glue and glass cloth, and the insulating layer completely covers the coil winding B-4-1 inside. like Figure 10As shown, the coil winding includes the first coil B-4-1-1 and the second coil B-4-1-2, the first coil B-4-1-1 is wound counterclockwise from inside to outside, the second coil B -4-1-2 Winding clockwise from outside to inside, th...

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Abstract

A low-frequency and large-displacement angular vibration table comprises a case, a work tabletop, a main shaft driving the work tabletop to rotate, a moving coil assembly, a magnetic circuit assembly, a motor driving the magnetic circuit assembly to rotate, a closed-loop control assembly of the motor, an electric viscoelastic feedback control assembly, an air bearing and an angular displacement sensor. The main shaft is fixedly connected with the moving coil assembly, and the magnetic circuit assembly is fixedly connected with a rotor of the motor through a connector. The moving coil assembly comprises a moving coil base body and coils, wherein the moving coil base body is fixedly connected with the main shaft. The magnetic circuit assembly comprises a magnetism guide ring, a central magnetic pole and magnetic steel, wherein the magnetism guide ring, the central magnetic pole, the magnetic steel and an air gap form a closed magnetic loop. The central magnetic pole is located in the magnetism guide ring, the magnetism guide ring is coaxial with the central magnetic pole, and the magnetic steel is located between the magnetism guide ring and the central magnetic pole and attracted to the central magnetic pole. The moving coil assembly is located between the magnetic steel and the magnetism guide ring and is coaxial with the magnetism guide ring. The low-frequency and large-displacement angular vibration table has the advantages that the distortion factor of output wave forms is small, and the output angular displacement is large.

Description

technical field [0001] The invention relates to a low-frequency large-displacement-angle vibrating table, in particular to an angular vibrating table used for calibration of an angular vibration sensor and capable of outputting low-frequency large-displacement vibrations. technical background [0002] The angular vibration table is not only widely used to calibrate the dynamic characteristics of various angular vibration (angular displacement, angular velocity, angular acceleration) sensors, but also to conduct angular vibration environmental tests on various products. [0003] At present, large-displacement-angle vibration tables with an angular displacement exceeding 180° generally adopt a structure based on a brushless motor. Jun Peng, Qun He, Jingfeng Xue and Hao Sun published a paper titled Low Frequency Standard Angle Shaker in the Journal of Measurement Technology, Volume 25, Issue 6, 2005. The low-frequency angular vibration table is mainly composed of a mechanical ...

Claims

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Application Information

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IPC IPC(8): G01D18/00G01M7/02
Inventor 何闻唐波贾叔仕周杰
Owner ZHEJIANG UNIV
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