Physically Based Initialization of Modes when Simulating Hybrid Systems

Switched bond graphs are natural extensions of classical bond graphs and they allow mod eling of hybrid systems If using switched bond graphs there is an extension to the mechanical momentum This extension called generalized momentum includes eg charge in electrical circuits and volume in hydraulical systems In the same way as the principle of momen tum conservation is used in mechanical systems to describe instant changes generalized momentum conservation can be used in switched bond graphs to determine initial conditions af ter changing modes Furthermore the modeinitialization procedure is algorithmic from a switched bond graph