Enhanced Time-stepping FEM Simulation using Digital Signal Processing

摘要

The purpose of this paper is to present a novel approach in time-domain simulations based on the time-stepping finite element method (FEM). The method uses a single time-stepping FEM simulation to determine the unit step response of the system. On the basis of this response, a digital filter with transfer function equal to that of the target system is designed. This allows excitation to be varied without need for the field analysis to be performed again. Such an approach can give substantial speed-up in electromagnetic or structural simulation. The proposed approach was validated in the simulation of a pulsed eddy-current inspection system and in the simulation of the eddy currents induced in the shield of a busbar system.