Modeling Discontinuous Behavior with Hybrid Bond Graphs
Pieter J. Mosterman · 2003
This paper discusses a technique that combines bond graph energy-flow modeling and signal-flow modeling schemes for modeling discontinuities in physical systems. This enables the generation of complex, multi-mode behaviors without violating the energy flow principles imposed by bond graphs. Mode switching is achieved by controlled junctions which assume one of two states: on and off. The control function of the junctions are specified as state transition graphs or tables. The modeling methodology presents a common framework for modeling abrupt switching elements, piecewise linear components, and subsystems that undergo structural changes without having to pre enumerate system modes. 1 Introduction Recent advances in model-based and qualitative reasoning have led to researchers developing large scale models of complex, continuous systems, such as power plants, aircraft, and space station sub-systems. Configuration and individual component description changes cause multimode behavior i...