Flexible cable stiffness test method, system and medium

Abstract

The invention provides a method for measuring the stiffness of a flexible cable, comprising: a step of simulating weightlessness: simulating a weightlessness environment to make the motion cabin move in a plane; an excitation step: periodically exciting the motion cabin with a set amplitude; Monitoring step: measure the rotation angle and displacement of the motion cabin relative to the fixed cabin; separation step: separate the measured excitation motion from the non-excitation motion to obtain non-excitation motion; steady-state control step: control the motion cabin during the motion according to the non-excitation motion Do not collide with the fixed cabin, and obtain the steady-state control command; execution steps: control the force and torque according to the periodic excitation and steady-state control commands, and distribute the force and torque to each actuator; calculation steps: collect the signal at the cable end of the fixed cabin The force and moment, according to the amplitude of the periodic excitation, is calculated to obtain the stiffness coefficient matrix of the flexible cable. The invention provides a reference basis and a calculation model for the selection and interference analysis of the follow-up double-super-satellite type cabin cable.

Description

technical field [0001] The invention relates to the technical field of composite control, in particular to a test method, system and medium for measuring the stiffness of a flexible cable. Background technique [0002] The requirements for attitude pointing accuracy and stability of future advanced spacecraft are two orders of magnitude higher than the current level. Traditionally, the fixed-connection design of the load and the platform is adopted, and the dynamic characteristics of the two are deeply coupled, which makes it difficult to achieve the double-exceeding index of the load. Although the active and passive micro-vibration suppression methods have achieved certain results, the defects of the limited fixed-connection design, It is difficult to achieve double super indicators. [0003] The "Shuangchao" satellite platform breaks the traditional fixed connection design, and uses non-contact, high-precision, and time-delay displacement sensors to separate the load (cha...

AI Technical Summary

Problems solved by technology

[0004] At present, the wireless power supply and information transmission technology in the satellite is not yet mature, and the energy and information interaction between the two cabins needs to be realized through cabin cables.

Images