Satellite momentum wheel vibration disturbance test and data interpretation method

Abstract

Disclosed is a satellite momentum wheel vibration disturbance test and a data interpretation method. The method comprises the steps of firstly building a harmonic wave superposition mathematical model through actual measurement of disturbing force generated by a momentum wheel; then building satellite finite element models of satellites in an orbit state and multiple kinds of ground vibration disturbance test states respectively, adopting a frequency response analysis method to calculate vibration disturbance overall response of each harmonic wave to sensitive equipment in all kinds of satellite states, choosing a ground test state with minimum analysis result difference of the satellites in the orbit state to carry out the momentum wheel vibration disturbance test and conduct actual measurement of a vibration disturbance of a momentum wheel to the sensitive equipment; finally amending the analysis result of the orbit sate through postprocessing of the measurement result so as to assess and verify the accuracy and validity of the design of the satellite momentum anti-wheel vibration disturbance. According to the satellite momentum wheel vibration disturbance test and the data interpretation method, simulated analysis is adopted to guide test program design and result interpretation, the influences of each harmonic wave component of momentum wheel disturbing force to the sensitive equipment respectively can be assessed, the calculated amount is small, and convenience is brought to project implementation.

Description

technical field [0001] The invention relates to a satellite momentum wheel disturbance test and a data interpretation method. Background technique [0002] As an important control actuator of satellites, momentum wheels, reaction wheels or control moment gyroscopes are essential on-board equipment to achieve three-axis stable attitude control of satellites. However, due to factors such as uneven mass distribution of the flywheel and defects in the momentum wheel bearings caused by the machining error of the momentum wheel, each momentum wheel will generate different degrees of disturbance force and torque during normal operation, so that the satellite as a whole or cabin The reciprocating motion with wide frequency and small amplitude is locally generated on the plate, which is called micro-vibration. Momentum wheels are also the most important source of micro-vibration disturbances for satellites. [0003] The micro-vibration phenomenon caused by the momentum wheel is an ...

AI Technical Summary

Problems solved by technology

This method has two disadvantages: 1. The time history response requires a large amount of calculation; 2. It is not possible to evaluate the influence of each harmonic component of the momentum wheel disturbance force on the sensitive equipment one by one.

In addition, my country currently lacks corresponding normative standards and technical guidelines for how to carry out satellite momentum wheel disturbance tests, how to design test programs, determine the technical status of satellites, and interpret test results.

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