A Java Implementation of an Environment for Hybrid Modeling and Simulation of Physical Systems

Bond graphs are a powerful formalism for modeling the continuous dynamics of physical systems To model fast continuous changes as discontinuities hybrid bond graphs introduce an ideal switching element the con trolled junction that may inhibit power transfer by enforcing its common variable to be zero When bond graph storage components become dependent upon one another because of a discrete state change their stored value may change discontinuously Consistent values are computed by conserving the physical state variable e g momentum mass One discrete state change may cause a number of further discrete state changes without a ecting the state vector When no further changes occur the state vector is updated and this again may cause a new sequence of discrete state changes These consecutive discrete state changes can be classi ed based on parameter abstraction and time scale abstraction HyBrSim implements the hybrid bond graph modeling paradigm as a Java based mod eling and simulation environment