Test and determination method for cable rigidity in separate space vehicle compartment

Abstract

The invention relates to a method for testing and measuring the rigidity of cables in a separated spacecraft cabin in the field of micro-vibration transmission and multi-body dynamics, comprising the following steps: Step 1, platform cabin micro-vibration simulation: according to the actual vibration magnitude and vibration of the satellite Frequency range, using a linear voice coil motor to drive the platform cabin to simulate micro-vibration; Step 2, system fundamental frequency measurement: use a linear motor to apply known vibration acceleration excitation on the platform cabin side, install a fiber optic gyro and linear acceleration on the load cabin Measure the response of the load compartment, and determine the fundamental frequency of the system according to the response of the load compartment; step 3, calculate the cable stiffness; step 4, determine the optimal type and layout of the cable. The present invention can realize accurate measurement of cable stiffness, and the equipment used is common equipment in the aerospace field, which is easy to implement. Accurate cable stiffness measurement provides a basis for system dynamics modeling and controller design, and provides a basis for separate spacecraft Support is provided for the implementation of dual super-indicators.

Description

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

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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