3*3 type three-point dynamometric center-of-mass table system

A platform system and center of mass technology, applied in the field of spacecraft assembly testing, can solve problems such as errors, mistakes, and deformation of the center of mass table, and achieve the effect of meeting the measurement needs, high precision, and expanding the measurement range

Active Publication Date: 2013-10-16
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

If you choose the multi-point (more than three points) method to measure the centroid, the sensor will be subjected to nonlinear force due to

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  • 3*3 type three-point dynamometric center-of-mass table system
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  • 3*3 type three-point dynamometric center-of-mass table system

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Embodiment Construction

[0018] The 3x3 type three-point force centroid platform system of the present invention will be described in detail below with reference to the accompanying drawings, but the description is only exemplary and not intended to limit the protection scope of the present invention.

[0019] refer to figure 1 , figure 1 The 3 by 3 type three-point force-measuring center-of-mass platform system of the present invention is exemplarily illustrated. The force-measuring center of mass platform includes an upper table 1, a sensor assembly 3, an auxiliary support 4 and a lower table 2. The structure of the upper table 1 is a steel-aluminum composite table. The steel table provides the connection interface between the test piece and its upper surface, and the aluminum table below it. , to accurately transfer the weight of the loaded test piece to the three sensor assemblies distributed at an angle of 120o on the same circumference. The sensor assembly 3 accurately transfers the weight to ...

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Abstract

The invention discloses a 3*3 type three-point dynamometric center-of-mass table system, which is prepared by combining multiple sensors. Three sensors with low standard measuring ranges are combined to form a sensor assembly with a higher precision and a non-standard measuring range; and three sensor assemblies with non-standard measuring ranges are assembled to form a center-of-mass table with a wide measuring range. According to the invention, errors caused by non-linear bearing of the sensors during multi-point test are prevented, and relatively large redundancy of measuring range and low precision caused by selection of wide-range sensors are avoided.

Description

technical field [0001] The invention belongs to the technical field of spacecraft assembly testing, and in particular relates to a system for measuring the center of mass of a large spacecraft. Background technique [0002] The quality characteristic parameters are a series of mechanical characteristic parameters related to the mass of the object. Quality characteristics include mass, center of mass position, moment of inertia and product of inertia relative to a given coordinate system, and are the basic inherent characteristic parameters that describe the mechanical characteristics of products. In the development of spacecraft, it is necessary to determine these parameters through experiments, and make necessary adjustments to these parameters according to the design requirements. [0003] At present, the domestic three-point force-measuring center-of-mass test equipment has a low range, which cannot meet the mass-centroid test tasks of large spacecraft (such as weight 17...

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Application Information

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IPC IPC(8): G01M1/12
Inventor 陈勉杜晨赵科王洪鑫徐在峰杨洋溢
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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