Plume diagnosis device of electric propulsion engine

Abstract

The invention discloses a plume diagnosis device of an electric propulsion engine, comprising a current collecting device, a current meter and a current collecting device moving part. The current collecting device consists of current collecting rings which are concentric and are different in size; the current meter is used for monitoring the current collected by each current collecting ring; the current collecting device moving part is used for realizing the movement of the current collecting device along the direction of plume axis of the engine so as to obtain current distribution at different axial positions; and the current collecting device obtains charged particle number density of the plume at different radial positions by the current collecting rings with different diameters. The invention adopts a device which is simpler, obtains the divergence angle of the engine plume and distribution condition of charged particles in the plume; and the operation and control in the diagnosis process are relatively simple and are easy to master.

Description

technical field [0001] The invention belongs to the technical field of space electric propulsion engine jet plume diagnosis, belongs to a contact diagnosis method, and relates to an electric propulsion engine plume diagnosis device. Background technique [0002] Electric propulsion engines have the advantages of high specific impulse, high efficiency, long life and small size, and can be applied to most space propulsion tasks such as orbit maintenance, orbit transfer, resistance compensation, attitude control, and interplanetary flight main propulsion. It has broad application prospects. [0003] Since the 1990s, various aerospace powers in the world have developed various electric propulsion engines for space propulsion, such as ion engines, Hall effect thrusters, arc heating thrusters, and colloidal ion engines. The common feature of the above-mentioned engines is that the electrical energy from the spacecraft power supply is converted into the kinetic energy of the prope...

AI Technical Summary

Problems solved by technology

[0006] As far as the contact diagnosis method is concerned, although the electrostatic probe can obtain the electron and ion density information in the electric propulsion plume, if you want to get the distribution of these particles in the plume, you need a probe displacement system to realize different plumes. diagnostics at the position, which puts high demands on the stability of the plume and also causes disturbances to the plume

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