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System and method for testing position and attitude of tethered satellite in microgravity environment

A tethered satellite and test system technology, applied in the satellite field, can solve the problem that the tethered tension control algorithm and the pose control algorithm do not have a verification platform, etc., and achieve the effects of reducing the amount of calculation, reducing the control period, and improving the control accuracy.

Pending Publication Date: 2022-03-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

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Problems solved by technology

However, there is no suitable verification platform for the tether tension control algorithm and pose control algorithm of a single star.

Method used

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  • System and method for testing position and attitude of tethered satellite in microgravity environment
  • System and method for testing position and attitude of tethered satellite in microgravity environment
  • System and method for testing position and attitude of tethered satellite in microgravity environment

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specific Embodiment

[0064] This embodiment provides a satellite motion simulation system for tethered satellite experiments. The simulator is mainly composed of three parts: the simulation star, the positioning system and the host computer.

[0065] The positioning system adopts visual positioning, shoots the simulated star through the CMOS camera above the simulated star, and uses image recognition to estimate the absolute position and attitude of the simulated star.

[0066] The upper computer is mainly used to process the data of the positioning system, and interact with the simulated star through the wireless serial port to realize the command downlink and the upload of the status data of the simulated star, complete the data interaction and control between the user and the on-board computer on the air flotation platform, and record the test data.

[0067] The simulated star is composed of a propulsion device, an air flotation device, a main control system, a power supply system, an attitude...

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Abstract

The invention discloses a tethered satellite position and attitude test system in a microgravity environment. The tethered satellite position and attitude test system comprises a simulation satellite, a positioning system and an upper computer, the positioning system shoots the simulated star through a camera installed above the simulated star, and the camera estimates the absolute pose of the simulated star through image recognition. The upper computer is used for processing data of the positioning system, performing data interaction with the simulation satellite, and realizing receiving of downlink state data of control data and uplink state data of the simulation satellite; completing data interaction and control between the user and the simulation satellite, and recording test data; the simulated satellite is floated by an air film generated by the air feet and the platform, can translate and rotate on the horizontal plane under the thrust action of the propellers, and can laterally move through the tether control device to model the running state of the satellite. According to the invention, the simulation satellite can be ensured to well simulate the motion state of the actual satellite in the orbit plane, and a good simulation condition is provided for the tether winding and unwinding algorithm of the tethered satellite.

Description

technical field [0001] The invention belongs to the technical field of satellites, and in particular relates to a tethered satellite position attitude test system and method. Background technique [0002] As a new type of spacecraft, tethered satellites have great application potential in earth observation, space debris removal, space payload transmission, and satellite orbit transfer. Tethered satellites have the characteristics of strong nonlinearity, underactuation, and negative damping vibration. The study of its dynamic characteristics and tension control algorithm has important theoretical significance and engineering application prospects. Although on-orbit experiments are the most reliable method to verify the feasibility of control theory and schemes, engineering practice is too complicated and expensive. Therefore, people turned their attention to the ground equivalent experiment, using the air bearing platform to simulate the in-orbit operating conditions of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/0833Y02T90/00
Inventor 黄攀峰文思捷张帆金澳沈刚辉
Owner NORTHWESTERN POLYTECHNICAL UNIV