Method for measuring and testing stiffness of cable between separate spacecraft cabins

Abstract

The invention relates to a method for measuring and testing the stiffness of a cable between separate spacecraft cabins in fields of micro-vibration transmission and multi-body dynamics. The method comprises the following steps: step one, simulating micro-vibration of a platform cabin; to be specific, driving a platform cabin to move to simulate micro vibration by using a linear voice coil motor according to an actual vibration magnitude and a vibration frequency range of a satellite; step two, measuring a fundamental frequency of a system; to be specific, applying known vibration accelerationexcitation to one side of the platform cabin by using a linear motor, mounting a fiber optic gyroscope and a linear accelerometer on a load cabin, measuring the response of the load cabin, and determining a system fundamental frequency based on the response of the load cabin; step three, calculating the cable stiffness; and step four, determining optimal model selection and layout of the cable. Therefore, the accurate measurement of the cable stiffness is realized; all used devices are common ones in the aerospace field; the method is easy to realize; the basis is provided for the system dynamics modeling and controller design based on the accurate cable stiffness measurement; and the support is provided for realizing the dual super indicators of the separate spacecraft.

Description

technical field [0001] The invention relates to the fields of micro-vibration transmission, multi-body dynamics and the like, and in particular to a method for measuring the stiffness of a cable in a separated spacecraft cabin. The results can be used for discrete spacecraft dynamics modeling, controller design. At the same time, this test analysis method can also be used in the impact analysis of cable connections in other fields. Background technique [0002] Using the non-contact magnetic levitation actuators to interact with the separated spacecraft, by physically isolating the path from the vibration of the platform cabin to the load cabin, the ultra-high pointing accuracy and ultra-high stability of the load cabin can be achieved. The flexible connection cables between the cabins have a great influence on the realization of the "double super" index of the load cabin. The connecting cable between separate spacecraft cabins is usually relatively short, and the relative...

AI Technical Summary

Problems solved by technology

However, it cannot accurately measure the stiffness of the cables in the cabin and give cable selection and layout optimization schemes, and it cannot provide support for the establishment of precise dynamic models and control scheme designs for separate spacecraft.

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