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Measuring system and measuring method for centroid

A measurement system, measurement method technology, applied in the field of precision mechanical engineering

Pending Publication Date: 2019-03-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 3. This test method can only perform the centroid test of the tested piece in a fixed state

Method used

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  • Measuring system and measuring method for centroid
  • Measuring system and measuring method for centroid
  • Measuring system and measuring method for centroid

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Embodiment Construction

[0080] Below in conjunction with accompanying drawing, measuring system and measuring method of the present invention are further introduced:

[0081] Measuring system composition

[0082] Such as figure 1 As shown, a center of mass measurement system includes a three-axis air buoyancy moment test bench 1, a two-dimensional rotating mechanism 2, a first center of mass adjustment mechanism 3 and a second center of mass adjustment mechanism 4;

[0083] The three-axis air bearing moment test bench 1 includes a support 11, an air bearing 12, an air bearing platform 13, a gravity balance adjustment mechanism 14, and a force sensor assembly 15; the air bearing 12 is coaxially installed in the support 11, The air bearing 12 is equipped with an air floating platform table 13; the lower surface of the air floating platform table 13 is equipped with a gravity balance adjustment mechanism 14 for adjusting the three directions of X, Y, and Z, and for measuring the three directions of X, ...

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Abstract

The invention relates to a measuring system and a measuring method for a centroid. The system is compact and reliable in structure, and can test a centroid of a tested piece in any state. The method has a simple calculation process and high calculation precision. The system mainly comprises a three-axis air floating moment test bench, a two-dimensional rotating mechanism, a first centroid adjusting mechanism and a second centroid adjusting mechanism. The three-axis air floating moment test bench comprises a support, an air floating bearing, an air floating platform table, a gravity balance adjusting mechanism, and a force sensor assembly. The lower surface of the air floating platform table is provided with the gravity balance adjusting mechanism for adjusting three directions of X, Y, andZ, and a force sensor assembly for measuring force conditions in the X, Y, and Z directions. The two-dimensional rotating mechanism is mounted on the upper surface of the air floating platform table.The first centroid adjusting mechanism is mounted on the lower surface of a loading plate of a pitching portion in the two-dimensional rotating mechanism, and the tested piece is placed on the uppersurface. An azimuth portion of the two-dimensional rotating mechanism is provided with the second centroid adjusting mechanism.

Description

technical field [0001] The invention belongs to the technical field of precision mechanical engineering, and in particular relates to a centroid measurement system and a measurement method. technical background [0002] The high-speed movement mechanism in space has high requirements on the trimming accuracy of the center of mass of the rotor, and the high-precision center of mass measurement is the basis. The output torque of the attitude control flywheel on a common satellite is 0.15Nm, and the allowable external torque interference generally does not exceed 1 / 5, that is, 0.03Nm. For a 200kg rotating load, when rotating at 100° / s, the corresponding centroid deviation requirement is better than 24μm , otherwise, in the space microgravity environment, the unbalanced moment caused by the mass eccentricity of the high-speed rotor may cause periodic precession instability of the attitude angle of the spacecraft. [0003] The large-load high-speed rotor will go through several ...

Claims

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Application Information

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IPC IPC(8): G01M1/12
CPCG01M1/122Y02T90/00
Inventor 崔凯李治国司敬芝刘鹏谢友金
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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