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Double-motor automatic balancing method of triaxial satellite simulator

A technology of satellite simulation and dual motors, which is applied in the field of satellite attitude control, can solve the problems of poor trimming accuracy of stepping motors, and achieve the effect of improving trimming accuracy

Active Publication Date: 2016-05-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is aimed at the deficiencies of the above-mentioned background technology, and provides a dual-motor automatic balancing method for a three-axis satellite simulator, which uses the precision of the ultrasonic motor to compensate the unreachable precision of the stepping motor, and improves the trimming accuracy of the simulator. Solved the technical problem of poor trimming accuracy of stepper motors

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  • Double-motor automatic balancing method of triaxial satellite simulator
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  • Double-motor automatic balancing method of triaxial satellite simulator

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[0029] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0030] To simulate the zero-gravity, low-friction space environment of the three-axis air-floating turntable system, it is necessary to eliminate the influence of gravity on the air-floating turntable. The purpose of the automatic balance system is to reduce the eccentricity, so that the center of mass of the air bearing turntable and the center of gyration coincide as much as possible. The executive mechanism of the automatic leveling system is the motor. In this article, we use stepper motors and ultrasonic motors as the actuators. Different precisions of the same motor have different effects on the precision after trimming. Therefore, we need to compare and analyze to drive what we need precision motor.

[0031] Using the stepper motor as the actuator has a great advantage. Its control accuracy is very high, because its error is constant and wil...

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Abstract

The invention discloses a double-motor automatic balancing method of a triaxial satellite simulator, wherein the double-motor automatic balancing method belongs to the technical field of satellite gesture control. According to the double-motor automatic balancing method, after artificial balancing is performed and stable airjet control gesture is realized, automatic balancing is performed by means of a stepping motor and an ultrasonic motor, wherein automatic balancing comprises the steps of firstly estimating a disturbance torque through establishing an air floating table kinetic model; then balancing an air floating table kinetic equation for determining the to-be-moved distance of a mass block in an actuating mechanism, then calculating the swinging period of the air floating table according to the vector of the mass center of the simulator which comprises a stepping motor mass block, estimating the disturbance torque according to the swinging period and determining an eccentric distance; and finally driving the stepping motor or the ultrasonic motor according to a comparison result between the eccentric distance precision and 0.01mm. According to the double-motor automatic balancing method, fine balancing is performed on the triaxial satellite simulator by means of the ultrasonic motor for compensating a defect of no enough precision in coarse balancing; furthermore balancing precision of the simulator is improved; and subsequent simulator tests are well ensured.

Description

technical field [0001] The invention discloses a dual-motor automatic balancing method for a three-axis satellite simulator, belonging to the technical field of satellite attitude control. Background technique [0002] With the continuous development of micro-satellites, the accuracy requirements for satellite simulators are becoming more and more stringent. How to provide a micro-gravity and micro-friction environment for satellite simulators under the influence of ground gravitational disturbance torque has become the focus of researchers' research. There is a large gravitational disturbance moment in the satellite simulator without trimming. If the simulator is used directly in the experiment, it may cause unreliable or invalid experimental data. This will not only consume manpower and material resources, but also fail to achieve our goals required requirements. During the trimming process of the satellite simulator, since the accuracy of manual trimming is not very high...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 华冰陈林吴云华关欣
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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