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

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...

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 small. When measuring the contact force, there will be a certain measurement error when directly measuring the contact force at the contact point.

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