Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory

A technology of cantilever beam theory and measurement method, which is applied in the field of contact force measurement of space-borne slip rings, and can solve problems such as contact force and small deformation.

Inactive Publication Date: 2014-06-04
ZHONGWEI ELECTRONICS INSTR FACTORY ZHANGZHOU CITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small diameter of the brush wire of the spaceborne conductive slip ring, the contact force and deformation are also very sm

Method used

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  • Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory
  • Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory
  • Method and system for measuring contact force of satellite-borne slip ring based on cantilever beam theory

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Embodiment

[0043] A method for measuring the contact force of a spaceborne slip ring based on the cantilever beam theory of the present embodiment comprises the following steps:

[0044] (1) The mechanical model of the brush wire 2 (such as figure 1 shown) is simplified to the form of a cantilever beam, which is convenient for analysis. Assuming that the quality of the brush wire 2 is continuously and evenly distributed, that is, the cantilever beam is a straight beam with equal cross-section, and the Cartesian coordinate system of the cantilever beam is established (such as figure 2 shown): take the fixed end of the brush wire 2 as the origin point O, take the length direction of the brush wire 2 when the brush wire 2 is not deformed as the x-axis, and the length direction is the positive direction, and the load F acts on the wire When the brush wire 2 is on, the deformation direction of the brush wire 2 is the y-axis, and the deformation direction is the positive direction;

[0045] ...

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Abstract

The invention discloses a method and system for measuring the contact force of a satellite-borne slip ring based on the cantilever beam theory. According to the method, the contact force of the satellite-borne slip ring is indirectly and accurately measured, namely, a measuring point is set near a contact point between an electric brush wire and the electric conductive slip ring, a relational expression between the initial measuring force exerted on the measuring point and the contact pressure at the contact point is elicited according to a deflection curve equation of a uniform-section straight girder, monadic regressive analysis is conducted on data measured at the measuring point through the least square method according to the linear rule of deformation, so that the accurate initial measuring force is obtained, the contact force is obtained, and the measuring accuracy is high. The system for measuring the contact force is composed of the electric conductive slip ring, the electric brush wire, a loading lifting hook, a force sensor, a displacement sensor, a connecting board, an accurate electric control motion table, a motor driver, a motor control card, a multichannel data acquisition card, a current sensor, an industrial personal computer and a displayer. Design is ingenious, operation is convenient and measurement is accurate.

Description

technical field [0001] The invention relates to a method and system for measuring the contact force of a space-borne slip ring, and more specifically, to a method and system for measuring the contact force of a space-borne slip ring based on the cantilever beam theory. Background technique [0002] The conductive slip ring (slip ring for short) component is used to realize the signal and current transmission between two relative rotating parts. Taking the column slip ring as an example, it is mainly composed of slip ring body, brush assembly, bracket, support system and other components. The brush wire contacts the ring with a certain pressure. Through the slip ring, the movable parts can be rotated freely by 360°, and the signal and (or) current can be transmitted at the same time. Slip rings are usually a collection of many rings. The part that transmits signals instead of signal lines is called signal ring; the part that transmits current instead of power lines is usuall...

Claims

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Application Information

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IPC IPC(8): G01L5/00
Inventor 刘春节吴小峰
Owner ZHONGWEI ELECTRONICS INSTR FACTORY ZHANGZHOU CITY
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