Space microwave component low pressure discharge value simulation method

A technology of microwave components and numerical simulation, applied in computing models, biological models, instruments, etc., can solve problems such as staying in the exploration stage

Active Publication Date: 2012-07-11
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

This software can only analyze rectangular waveguides, and the numerical simulation of low pressure discharge is still in the exploratory stage

Method used

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  • Space microwave component low pressure discharge value simulation method
  • Space microwave component low pressure discharge value simulation method
  • Space microwave component low pressure discharge value simulation method

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specific Embodiment approach

[0069] 1. Set the air pressure of the space where the space microwave component is located to 1mBar, the gas type to nitrogen, and the metal material on the inner surface of the component to be silver. The structure diagram of the S-band impedance converter is as follows figure 2 As shown, the working frequency band is 3.1-3.4GHz, the in-band insertion loss is <0.4dB, and the input power of the impedance converter is P. According to the structure of the microwave components, the step size of space grid division, the calculation time is set to 100 ns, and the time step size of particle propulsion is set to 0.5 ns.

[0070] 2. According to the initial state set in step 1, calculate the electric field and magnetic field that the particle receives in each space grid unit, and then use the Lorentz force formula to calculate the Lorentz force that each space particle receives;

[0071] 3. According to the Lorentz force on the particles in the spatial grid unit, the initial velocity...

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Abstract

The invention relates to a space microwave component low discharge value simulation method, which includes steps as follows: establishing a low pressure discharge numerical model of a space microwave component, performing accurate numerical analysis aiming at the motion process of discharged particles during low pressure discharge as well as the total discharged particle number, and obtaining the low pressure discharge threshold value of the space microwave component. According to the invention, the second electron multiplication effect on a metal surface of a space microwave component is taken into consideration, and the discharge threshold value of an intersected stage under a low pressure environment and between the discharge under a vacuum environment and the discharge under a high pressure environment can be analyzed. Meanwhile, all collision types dominating an air space in the microwave component are taken into consideration and the accuracy of the low pressure discharge numerical simulation method in the space microwave component is ensured. Through the method, repeated tests for obtaining the low pressure discharge threshold value of the space microwave component are avoided, the design period is shortened, the preparation cost is reduced, and the method is extremely suitable for analyzing the numerical part of the low pressure discharge in the space microwave component.

Description

technical field [0001] The invention relates to a numerical simulation method for low-pressure discharge of space microwave components, and belongs to the technical field of reliability research of space microwave components. Background technique [0002] There is a risk of low-pressure discharges in spacecraft microwave components from launch to orbital operation. After entering the orbit, the space microwave components work for a long time under high power conditions, and the accumulation of gas inside the components may also cause low-pressure discharge. In addition, with the advancement of my country's manned spaceflight and deep space exploration programs, spacecraft may also be harmed by low-pressure discharges during reentry into the atmosphere or landing on extraterrestrial bodies. Moreover, large aeronautical equipment such as airships also have the risk of low pressure discharge due to their working environment. Today, space microwave components used in spacecraf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/00
Inventor 王瑞崔万照李韵
Owner XIAN INSTITUE OF SPACE RADIO TECH
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