Bond-graph methodology

Network thermodynamics with bond graph methodology... 

Borutzky, W. (2010). Bond Graph Methodology - Development and Analysis of Multidisciplinary Dynamic System Models. London, UK Springer-Verlag. ISBN 978-1-84882-881-0. 

Since bond graphs were devised by Professor Paynter [1] more than five decades ago, they have been mostly used for the development of continuous time models of multidisciplinary engineering systems in order to study the dynamic behaviour of a system. In addition, intensive research has been carried out and various approaches have been proposed how to account for the abstraction of discontinuities in a bond graph framework and how to extend bond graph methodology to systems suitably described by a hybrid model. More recently, bond graphs have also been used for model-based FDI of systems described by a continuous time model. So far, none of the reported approaches has attained common usage. 

Bond graph methodology assumes that the current amount of power P t) at time instant f > 0 transferred between two power ports can be expressed equally in all energy domains as the product of two power conjugated variables called effort, e, and ow, f, respectively. 

Modeling in LFT form requires for the model to be proper and observable [13]. The bond graph methodology allows by causal manipulations, the verification of these properties directly on the bond graph model. 

NETWORK THERMODYNAMICS WITH BOND GRAPH METHODOLOGY... 

---