Switchable structured bond: A bond graph device for modeling power coupling/decoupling of physical systems

The SS-Bonds can be internally represented with standard bond graph elements. To keep fixed the causality assignment even under switching, some algebraic constraints are added to the equation set of the switched structure, which in the Bond Graph domain can be represented with residual sinks. A minor modification on the internal implementation of the SS-Bonds allows the formalism for commutation modeling with the non-ideal approach consisting in adding parasitic components to avoid causality changes. Besides some models of electric-electronic circuits, slip-stick friction in a simple mechanical system and abrupt faults in a hydraulic two tank system are used to illustrate the new formalism and its performance in modeling and simulation.