GSEIM: a general-purpose simulator with explicit and implicit methods

A new simulation package, GSEIM (General-purpose Simulator with Explicit and Implicit Methods), for solving a set of ordinary differential equations (ODEs) is presented. A novel feature of GSEIM is the provision for solving a set of ODEs using explicit or implicit schemes. The organisation of the program is illustrated with the help of a block diagram. Various features of GSEIM are discussed. Two ways of incorporating new elements in GSEIM, viz., as a template and as a subcircuit, are explained by taking a specific example. The flexibility provided to the user to incorporate new elements together with the open-source nature of GSEIM is expected to make it a viable alternative for simulation of practical systems involving ODEs. Simulation examples are described, which validate GSEIM and bring out its capabilities.