Bicausal Bond Graphs

P.J. Gawthrop Centre for Systems and Control, University of Glasgow. [email protected] Key Words| Bond graphs; causality; system inversion; parameter estimation Abstract|Conventional bond graph theory is predicated on the notion that a bond has a single causal stroke: an effort imposed at one end implies a ow imposedat the other. This notion is implied by components having a known constitutive relationship. This paper discusses bond graphs with two causal strokes Bicausal bond-graphs. These can, for example, handle systems with unknown parameters. This paper addresses issues arising from the general idea of inverse systems physical systems with a non-standard input-output pattern; in particular: dynamic inverses, parameter estimation and state estimation.