Formal expansion method for solving an electrical circuit model

Tjendro Tjendro, Sudi Mungkasi


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.


damped oscillation; electrical circuit; formal expansion; van der pol equation; vibration model;

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