Method for measuring transient thrust and impulse of plasma thruster

Abstract

The invention belongs to the technical field of plasma propulsion testing, and particularly discloses a plasma thruster transient thrust and impulse measuring method, which comprises the following steps of: mounting a plasma thruster on a simple pendulum system base; performing non-contact measurement on a measurement target surface on the simple pendulum system by using a laser displacement sensor, and acquiring displacement time history data in real time; obtaining kinetic parameters of the simple pendulum system; and based on the displacement time history data and the kinetic parameters, through solving a kinetic equation of the simple pendulum system, carrying out inversion calculation to obtain a thrust time history curve and / or total impulse generated by the plasma thruster. According to the method for measuring the transient thrust and impulse of the plasma thruster, the high-precision and non-contact laser displacement sensor is used for monitoring the micro-displacement time history of the simple pendulum after the simple pendulum is subjected to the pulse thrust in real time, and a kinetic equation of a simple pendulum system is established and solved, so that the transient thrust and impulse of the plasma thruster are measured. And inverting a thrust time history curve and a total impulse of the thruster from the displacement data.

Images