Satellite momentum wheel vibration disturbance test and data interpretation method

A satellite momentum wheel and data interpretation technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the lack of normative standards and technical guidelines, the inability to evaluate the influence of momentum wheel disturbance force, and the calculation amount of time history response major issues

Active Publication Date: 2017-06-13
CHINA ACADEMY OF SPACE TECHNOLOGY
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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.
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  • Satellite momentum wheel vibration disturbance test and data interpretation method
  • Satellite momentum wheel vibration disturbance test and data interpretation method
  • Satellite momentum wheel vibration disturbance test and data interpretation method

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Embodiment Construction

[0058] Some details in the technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] A satellite momentum wheel disturbance test and data interpretation method, the process is as follows figure 1 shown, including the following steps:

[0060] (1) Measuring the disturbance force / torque of the momentum wheel:

[0061] Install the positive momentum wheels of the satellite on the six-component force measuring platform in turn, and measure the speed of each momentum wheel from 0 to the highest speed in the process of Ω max Disturbance force F in three directions x (t), F y (t), F z (t) and disturbance moment M in three directions x (t), M y (t), M z (t); the local coordinate system of the momentum wheel is defined as figure 2 As shown, the origin of the local coordinate system of the momentum wheel is at the center of mass of the momentum wheel, the z-axis is along the rotation axis of the momentum w...

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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 ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/23
Inventor 尹家聪李正举崔颖慧谢伟华陈曦刘刚刘波林勇文李友遐
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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