A High-Precision Semi-Physical Test Method for Disturbance Torque Compensation on Satellite
A technology of disturbance torque and test method, which is applied in the field of satellite space remote sensing, can solve the problems of inability to judge the compensation effect of the compensation system, large difference in free motion state, and high cost
Active Publication Date: 2020-07-10
SHANGHAI SATELLITE ENG INST
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Problems solved by technology
Since the satellite is always in a state of static restraint on the ground during the factory building test, which is quite different from the free movement state on orbit, it is impossible to judge the compensation effect of the compensation system through the change of the satellite's real attitude movement
In response to this situation, the satellite development process often uses a single-axis or three-axis air flotation test special test for testing, but the cost of the air flotation test is high, the cycle is long, the test is difficult, and there are satellite product hoisting bumps, etc. Therefore, it is very important to adopt a dynamic characteristic test method for on-board disturbance torque compensation combined with conventional tests
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[0027] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0028] Such as figure 1 As shown, the high-precision semi-physical testing method of disturbance torque compensation on the star of the present invention comprises the following steps:
[0029] Step 1. Measure the load motion mechanism, torque compensation wheel moment of inertia, and satellite moment of inertia J 机构 、J 补偿轮 、J 卫星 ; Establish the mathematical model of the motion disturbance torque of the load motion mechanism, as shown in the following formula (1):
[0030] T 机构 =J 机构 ·α 机构 ...
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The invention provides a high-precision semi-physical test method for on-satellite interference torque compensation. The method comprises the following steps of 1, actually measuring a load movement mechanism, the rotational inertia of a moment compensation wheel and the rotational inertial of a satellite; establishing a motion interference torque mathematical model of the load movement mechanism;2, connecting the load movement mechanism, the power supply of the torque compensation wheel and a communication cable according to the normal test state of the satellite; 3, connecting the interfaceof the load movement mechanism and the ground test interface of the torque compensation wheel with a high-speed and high-precision acquisition device through a cable; 4, carrying out differential treatment on the rotating angle data of the load movement mechanism and the rotating speed data of the compensation wheel, wherein the data are received by a simulation machine. According to the invention, during the conventional testing process of a satellite workshop, the dynamic characteristic test of the interference torque compensation on the satellite is realized. The design correctness of a compensation system is verified, and the torque compensation precision is tested. Index requirements are met, and the accuracy rate can be ensured to be over 95%.
Description
technical field [0001] The invention relates to the field of satellite space remote sensing, in particular to a high-precision semi-physical testing method for on-board disturbance moment compensation. Background technique [0002] High-precision remote sensing satellite imaging has higher and higher requirements for satellite attitude stability indicators. The interference torque generated by the load movement mechanism will seriously affect the attitude stability and pointing accuracy of the satellite, which will also affect the satellite imaging quality. For this reason, the torque compensation wheel should be used to compensate the disturbance generated by the load movement mechanism, so as to reduce the disturbance to the satellite attitude. That is, when the load movement mechanism is working, the compensating wheel generates a control torque that is equal in magnitude to and opposite to the disturbance torque generated by the load movement, and compensates (offsets) t...
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IPC IPC(8): G01L3/14
CPCG01L3/1428
Inventor 俞洁吕建民刘伟王华韩旭洪振强陈祥夏远镜
Owner SHANGHAI SATELLITE ENG INST