TREATING THE INSTABILITIES IN MARCHING-ON-IN-TIME METHOD FROM A DIFFERENT PERSPECTIVE

In this work, a general method is presented to treat the instabilities which are frequently observed in the electromagnetic transient soluti ons using the marching-on-in-time method. The basic idea is to apply a n FIR filter with a constant group delay during the course of marching -in-time. An EFIE formulation for perfectly conducting bodies is used as a vessel to demonstrate the method. Sample numerical results are pr esented and discussed. The computed results, while showing good agreem ent with the data obtained from other methods, present great stability improvement.