Real-time estimation of electron dynamics in Hall effect thrusters using an extended Kalman filter

摘要

This paper considers the development of an extended Kalman filter for estimating the unknown dynamics of the electron temperature in a Hall effect thruster plasma discharge. Experimental measurements of the discharge current are used by the filter to correct the estimation as new measurement data arrives, resulting in a data-model fusion process. The estimator predicts the time history of the input signal, as applied to a zero dimensional predator-prey ordinary differential equation model in this work. Numerical examples show the feasibility of this estimation approach to use experimental data to inform computational modeling in real time.