Hall thruster thrust vector eccentricity calculation method

A Hall thruster and thrust vector technology, applied in instruments, measuring devices, complex mathematical operations, etc., can solve the problems of calculation errors, unable to obtain the eccentric results of thrust vectors, and achieve the effect of accurate calculation results

Active Publication Date: 2021-10-01
HARBIN INST OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the typical plume shape of the Hall thruster has a double-peak structure, and there is no natural double-peak function model, the existing calculation method will discard the data points between the double peaks, but this will have a negative impact on the final calculation. big error
This processing method also cannot get accurate thrust vector eccentricity results

Method used

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  • Hall thruster thrust vector eccentricity calculation method
  • Hall thruster thrust vector eccentricity calculation method
  • Hall thruster thrust vector eccentricity calculation method

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Embodiment Construction

[0018] see Figure 1-Figure 4 As shown, a Hall thruster thrust vector eccentric calculation method includes the following steps:

[0019] Step 1: Use a Faraday probe to measure the ion current density in the plume region of the Hall thruster;

[0020] Step 2: Analyze the contribution of ion current density to thrust vector eccentricity;

[0021] Step 3: Establish a space ion current density surface model in the plume region of the Hall thruster;

[0022] Step 4: Use the weighted least squares method to calculate the surface model to obtain the nonlinear equations for calculating the thrust vector eccentricity; use the Broyden rank method to solve the nonlinear equations, and iteratively calculate through the iterative equation to obtain the thrust vector Eccentric results.

[0023] Further, in step 1, the array Faraday probe is placed at a position four times the channel diameter of the Hall thruster, and the ion current density in the plume area is measured by means of cir...

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Abstract

The invention discloses a Hall thruster thrust vector eccentricity calculation method. The method comprises the following steps of 1, measuring the ion current density of a Hall thruster plume region by adopting a Faraday probe; 2, analyzing the contribution of ion current density to thrust vector eccentricity; 3, establishing a space ion current density curved surface model of the Hall thruster plume region; 4, calculating the curved surface model by adopting a weighted least square method to obtain a nonlinear equation set for calculating the eccentricity of the thrust vector; and solving the nonlinear equation set by adopting a broydn rank method, and carrying out repeated iterative calculation through an iterative equation to obtain a thrust vector eccentricity result. According to the method, the thrust vector eccentricity is calculated by analyzing the contribution of the ion current density at different included angles with the axis of the thruster to the thrust vector.

Description

technical field [0001] The invention relates to the technical field of electric propulsion plume calculation, in particular to a calculation method for thrust vector eccentricity of a Hall thruster. Background technique [0002] The Hall thruster is an advanced space propulsion technology, which has been widely used in space powers such as the United States and Russia. It has the advantages of simple structure, high specific impulse, high efficiency, etc., which can greatly reduce the quality of the satellite, improve the service life, and increase the payload. It is mainly used in on-orbit tasks such as satellite attitude control, orbital maneuvering, and position maintenance that require high control accuracy. . [0003] When the Hall thruster is working, there is a certain deviation between the thrust vector and the axis of the thruster, that is, the thrust vector is eccentric. Manufacturing tolerances, changes in structural components or mounting locations can cause io...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/312G01R19/08G06F30/20G06F17/16G06F17/15
CPCG01B7/312G01R19/08G06F30/20G06F17/16G06F17/15
Inventor 李鸿丁永杰魏立秋于达仁刘星宇唐捃博
Owner HARBIN INST OF TECH
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