Formal expansion method for solving an electrical circuit model

Tjendro Tjendro (Sanata Dharma University)
Sudi Mungkasi (Sanata Dharma University)

TELKOMNIKA (Telecommunication Computing Electronics and Control)
Vol 17, No 3: June 2019

We investigate the validity of the formal expansion method for solving a second order ordinary differential equation raised from an electrical circuit problem. The formal expansion method approximates the exact solution using a series of solutions. An approximate formal expansion solution is a truncated version of this series. In this paper, we confirm using simulations that the approximate formal expansion solution is valid for a specific interval of domain of the free variable. The accuracy of the formal expansion approximation is guaranteed on the time-scale 1.