A Hall thruster accelerated life test method

An accelerated life test, Hall thruster technology, applied in thrust reversers, instruments, machines/engines, etc., can solve the problems of long cycle, high cost, low accelerated test efficiency, etc.

Active Publication Date: 2021-04-13
BEIJING INST OF CONTROL ENG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0011] The technical problem solved by the present invention is: to overcome the problems of high cost, long cycle, and high technical risk of the Hall thruster life test and the problems of low efficiency and poor precision of the existing accelerated test, and provide an effective Hall thruster acceleration Life Test Method

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  • A Hall thruster accelerated life test method
  • A Hall thruster accelerated life test method
  • A Hall thruster accelerated life test method

Examples

Experimental program
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Effect test

Embodiment

[0166] During the accelerated life test of the Hall thruster, an example of the selection of the actual running time and the predicted time is listed below. A certain type of 5kW Hall thruster is selected as an example for the accelerated life test. The discharge channel of the thruster at the beginning of its life The average diameter D is φ120mm, the width W of the discharge channel is 20mm, the thickness of the inner wall of the discharge channel is 10mm, and the thickness of the outer wall of the discharge channel is 10mm.

[0167] (1) Before the official operation of the thruster, a pretreatment exhaust time of 10 hours is performed, and this time is recorded as time 0;

[0168] (2) Carry out the 0-200hr running test on the thruster, the profile measurement time is selected as 0, 100hr, and 200hr, and the wall profile of 400hr is obtained according to the extrapolation and prediction of the wall profile at these three moments, see Figure 6 shown;

[0169] (3) Process th...

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Abstract

The invention relates to an accelerated life test method of a Hall thruster, belonging to the technical field of performance testing of a Hall thruster. In this method, the Hall thruster is actually ignited for a short period of time. During the process, the wall profile of the discharge channel is measured at different times. According to the erosion rate formula of the discharge channel wall, the ion source parameters during this period are reversely calculated. Then, according to the wall erosion rate formula and ion source parameters, the wall profile of the discharge channel for the next period of time is extrapolated, and the wall material is removed by mechanical processing, so that the wall profile of the discharge channel reaches the predicted profile. The actual ignition test and the mechanical processing under the guidance of model extrapolation are used to remove the wall material alternately and iteratively until the wall of the discharge channel of the Hall thruster is eroded, and the life of the thruster is obtained by accumulating the test time and the predicted time.

Description

technical field [0001] The invention relates to an accelerated life test method of a Hall thruster, in particular to a life test method of a discharge channel of a Hall thruster, and belongs to the technical field of performance testing of a Hall thruster. Background technique [0002] The Hall thruster is a typical electric propulsion device in the world at present. figure 1 is an axial cross-sectional view of an example of a Hall thruster. The propellant xenon enters the channel from the anode (30) upstream of the annular discharge channel (20), and the anode provides a high potential at the same time; electrons are ejected from the cathode (40) at the downstream outlet of the annular discharge channel, and the cathode provides a low potential. Part of the electrons ejected from the cathode enters the interior of the annular discharge channel, and undergoes Hall drift motion under the action of the radial magnetic field generated by the external magnetic circuit (10) and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00F03H1/00
CPCF03H1/00F03H1/0081G01R31/00
Inventor 毛威扈延林沈岩吴朋安吴楠李胜军臧娟伟胡大为吴耀武山世华解舫杨健陈君李栋
Owner BEIJING INST OF CONTROL ENG
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