Self-neutralization device of ionic liquid thruster

Abstract

The invention discloses a self-neutralization device of an ionic liquid thruster, which is realized through control of a feedback circuit, and the feedback circuit is composed of a high-voltage isolation circuit, a sampling circuit, a control circuit, an electricity storage capacitor, an isolation resistor and the like. Accumulated charges are limited to a thruster and a high-voltage output end through the high-voltage isolation circuit, the charges are captured through the electricity storage capacitor and converted into voltage signals at the two ends of the capacitor, and the sampling circuit measures capacitor voltage through a voltage dividing method and transmits the capacitor voltage to the control circuit. The high-voltage isolation circuit changes the voltage value or the duty ratio of an output signal under the adjustment of the control circuit, so that the emission proportion of positive and negative ions of the thruster beam is changed, and the originally accumulated charge quantity is balanced. According to the device, the positive and negative ion emission proportion of the ionic liquid thruster can be autonomously balanced, self-neutralization work of the thruster can be maintained, the problem that a spacecraft is electrified due to charge accumulation is prevented, ionic liquid electrochemical reaction caused by charge imbalance is avoided, and the service life of the ionic liquid thruster is remarkably prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric propulsion thruster design, in particular to a self-neutralization device for an ionic liquid thruster. Background technique [0002] Electric propulsion is an advanced propulsion technology that uses electric energy to directly heat or dissociate and accelerate working fluids to form high-speed jets to obtain thrust. It has broad application prospects in other space missions. [0003] The ionic liquid thruster is a kind of electric propulsion, which uses a strong electric field to form a Taylor cone on the surface of the emitter, then draws out charged droplets or ions, and accelerates to generate thrust under the action of the electric field. The ionic liquid thruster passively supplies propellant through the capillary action mechanism, which is easy to miniaturize and array, and is one of the best propulsion schemes for attitude and orbit control of micro-nano spacecraft. [0004] Different ...

AI Technical Summary

Problems solved by technology

In practice, the emission of positive ions and negative ions of the ionic liquid thruster are two independent processes, which are affected by complex factors such as emission voltage, signal noise, and properties of the ionic liquid, so the thruster cannot ensure that the emitted Positive and negative ion currents are exactly the same, which eventually leads to charging problems in ionic liquids and spacecraft

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