A Condensation Procedure for Nonlinear Port-Based Models

A port based model is an external representation including pairs of input-output variables grouped into ports. Each port in a model is a representation of a mechanism for energy transfer into, or out of, the physical system modeled. Port based models always have an equal number of inputs and outputs because each port is composed of an input-output pair. The number of ports in such models must typically be reduced to decrease model size, protect proprietary internal topology or simply because the eventual user has no plans to make connections to them. The process of eliminating undesired model ports while maintaining useful ports is called condensation. The condensation of port-based linear system models was developed in [1]. This article extends the condensation process for port-based nonlinear models represented through Volterra series.