Method and system for calibrating disturbance torque of moving parts of spacecraft

A technology of moving parts and disturbance torque, applied in the field of disturbance torque calibration of moving parts of spacecraft, can solve problems such as attitude stability control and pointing control influence of remote sensing satellites, and achieve the effect of eliminating introduced errors

Active Publication Date: 2020-04-24
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

However, the interference generated by the large-scale pendulum movement also affects the attitude stability control and pointing control of remote sensing satellites, often exceeding the attitude stability and pointing accuracy requirements for camera imaging.

Method used

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  • Method and system for calibrating disturbance torque of moving parts of spacecraft
  • Method and system for calibrating disturbance torque of moving parts of spacecraft
  • Method and system for calibrating disturbance torque of moving parts of spacecraft

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Embodiment Construction

[0046] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] The imaging mechanism of the payload camera of a certain earth observation satellite is a movable part, and its conventional scanning swing angular velocity is ω (1 gear), and can be adjusted to 1 / 2 gear, 1 / 3 gear, 1 / 4 gear, etc., the scanning The angular range is the same.

[0048] Such as figure 1 and combine figure 2 , image 3 , Figure 4 As shown, it is the speed curve of the air bearing table under the working conditions of the load camera 1 gear, 1 / 2 gear, 1 / 3 gear, and 1 / 4 gear, and the unit of the ordinate is degree per second. In a certain calibration test, the movement angular velocity of the air bearing platform body is given when the load camera works in each gear mode. If there is no external interference, assuming that the speed of the air bearing table is ω when the load camera works in the 1st gear mode, then when t...

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Abstract

The invention discloses a method for calibrating the disturbance torque of a movable part of a spacecraft. The method comprises the following steps of: measuring the rotational inertia of an air bearing table; and obtaining the required compensation coefficient adjustment amount of a compensating mechanism by the rotational inertia of the air bearing table. The method can accurately obtain the compensation parameter calibration value of a flywheel, ensures the compensation of the interference generated by the motion of the movable part when satellite service operates so that a satellite platform reaches attitude stability and pointing precision required by the imaging of a load camera.

Description

technical field [0001] The invention relates to a technology for compensating disturbance moments of movable parts of a spacecraft, in particular to a method and system for calibrating disturbance moments of movable parts of a spacecraft based on a single-axis air bearing platform. Background technique [0002] With the development of aerospace remote sensing technology and the continuous improvement of application level, in order to achieve higher resolution and larger observation field in earth observation, remote sensing cameras often use large, reciprocating swinging mirrors as their imaging components. However, the interference caused by the large-scale oscillating mirror movement also affects the attitude stability control and pointing control of remote sensing satellites, often exceeding the attitude stability and pointing accuracy requirements for camera imaging. For this effect, in order to reduce the pressure on the ground through image registration, some satellite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08G01M1/10
CPCB64G1/244G01M1/10
Inventor 余维何益康马雪阳谢任远周连文
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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