Multi-dimensional air floatation follow-up system for satellite high-precision quality measurement

Abstract

The invention discloses a multi-dimensional air floatation follow-up system for satellite high-precision quality measurement. The multi-dimensional air floatation follow-up system comprises a spherical air floatation module and the like, wherein the spherical air floatation module supports the weight of a measured piece through an upper platform, a cylindrical air floatation module serves as a radial support to transmit a radial load, a force transmission cylinder is arranged between the spherical air floatation module and the cylindrical air floatation module, a two-axis rotation assembly ismatched with spherical air floatation to achieve any phase moment balance, a plane air floatation module is used for supporting the two-axis rotation assembly and is matched with the spherical air floatation module to achieve any phase moment balance together with the two-axis rotation assembly, a differential test module serves as a force transmission path of spherical hinge moment balance, tension and pressure balance at any angle in a plane is achieved, and two-way tension and pressure of two coordinate axes are tested, and an air path control system module is used for providing the compressed air for the spherical air floatation module, the cylindrical air floatation module and the plane air floatation module to lubricate an air floatation bearing. The system is advantaged in that three functions of mass center and rotational inertia testing and high-precision rotating in a satellite final assembly link can be considered.

Description

technical field [0001] The invention relates to a multi-dimensional air flotation follower system. Background technique [0002] Quality characteristics are a series of mechanical characteristic parameters related to product quality, including mass, center of mass position, moment of inertia and product of inertia, which are inherent parameters to describe the mechanical characteristics of products. This parameter directly affects the motion analysis and attitude control system design of the spacecraft, as well as launch control, orbit control and return control. The accuracy of this parameter directly affects the control accuracy and service life of the spacecraft. [0003] The existing quality measurement system has overcome some problems in the traditional quality measurement technology. It adopts integrated testing technology to realize the satellite installation and positioning at one time, and measure the quality characteristic parameters in all directions step by step...

AI Technical Summary

Problems solved by technology

However, as new models of spacecraft undergo major changes in shape, size, and weight, in order to meet the high-precision testing of products with different weights, it is often necessary to support sensor testing systems with different ranges, resulting in long development cycles and high production costs. , low utilization rate of equipment, etc.

On the other hand, the existing center-of-mass testing technology adopts the multi-point torque balance method. In order to realize the ultra-large load test, it is necessary to select a load cell with a large range. The sensor with the same linearity corresponds to a large system uncertainty, and the torque test accuracy of the system low, especially for spacecraft with relatively large weight and relatively small eccentric moment, the problem becomes more and more prominent

In addition, the existing static testing technology cannot eliminate the positioning error between the product and the test bench, and the switching link between the center of mass and the inertia test is manually used during the test process, which has low test efficiency, high labor intensity, and has a negative effect on the operator's skills. special requirements

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