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A Torque Offset Method of Hall Thruster

A technology of Hall thrusters and thrusters, which is applied in the direction of thrust reversers, aircraft, machines/engines, etc., can solve problems such as the influence of satellite attitude control, and achieve the effects of reducing design difficulty, reducing interference, and reducing propellant quality

Active Publication Date: 2019-09-06
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, all-electric propulsion usually adopts a propulsion mode in which multiple thrusters work in groups, so if the torque direction is not offset in detail in the application, it will seriously affect the attitude control of the satellite.

Method used

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  • A Torque Offset Method of Hall Thruster
  • A Torque Offset Method of Hall Thruster
  • A Torque Offset Method of Hall Thruster

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Experimental program
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Embodiment Construction

[0028] The movement of ions in the orthogonal electromagnetic field will be deflected by the Lorentz force, as shown figure 1 As shown, its deflection angle and deflection direction are respectively related to figure 1 The strength of the magnetic field is related to the direction of the magnetic field. When the Hall thruster is working, since a large number of ions move in the orthogonal electromagnetic field environment, they will be deflected and ejected in the same direction, and an axial torque will be generated on the thruster. The direction of the torque is related to the direction of the magnetic field, and the direction of the torque can be controlled by designing the positive and negative directions of the excitation current, as shown in the principle figure 2 As shown, the excitation current in the positive direction produces a magnetic field in the positive direction, and a clockwise torque is obtained, whereas the thruster working with the excitation current in ...

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Abstract

A Hall thruster torque offset method, the specific process is: evaluate and screen the torque generated by the selected Hall thrusters, and select the Hall thrusters with similar thrusts as the stand-alone objects that work in groups to achieve torque offset ; Determine the direction of the positive excitation current; according to the layout scheme and working mode of the spacecraft thrusters, according to the condition that each thruster adopts the forward excitation current to produce the same torque direction, determine the torque superposition or offset relationship of the thrusters between the installation positions; Polarity design for each Hall thruster; excitation current direction design for Hall thrusters of different polarities; polarity identification for thrusters of different polarities. The method of the invention enables the torques generated by the thrusters working in groups to cancel each other, thereby reducing the influence of the torques on the attitude control of the spacecraft.

Description

technical field [0001] The invention relates to a method for counteracting the torque generated by the Hall thruster on the spacecraft. It belongs to the field of spacecraft propulsion. Background technique [0002] Hall propulsion technology is currently a mature electric propulsion technology used internationally. Most of the geosynchronous orbit satellites of the European Space Agency and Russia use the Hall propulsion system based on the PPS-1350 or SPT-100 model to perform north-south position maintenance tasks. In 2017, Eutelsat designed a unique Hall all-electric propulsion geosynchronous communication satellite. Through the unique design of the three-joint manipulator, the efficiency of the Hall propulsion system was greatly improved, creating the shortest orbital time of 4 months for electric propulsion. record of. It can be seen that with the development of Hall thruster technology in the direction of high power, multi-mode, high specific impulse, and long life, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64G1/24B64G1/40F03H1/00
CPCB64G1/405F03H1/0081B64G1/24B64G1/245F03H1/0075
Inventor 张旭魏鑫李新刚吕红剑李静涛裴胜伟王敏
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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