Cellier, F. E., Otter, M. and Elmqvist, H., "Bond Graph Modeling of Variable Structure Systems", Proc. ICBGM'95 (Second International Conference on Bond Graph Modeling and Simulation), Las Vegas, Nevada, January 1995.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....discontinuous changes in system trajectories and or the model itself. In this respect, there is much commonality between the hsml project and recent developments by Elmqvist, Cellier et al. in the area of object oriented modeling [3] for a detailed view of state event handling see especially [4, 5]. This brief tutorial guide outlines the completion of the first phase in implementing a subset of the hsml concept in a working modeling and simulation environment, matlab [6] Preliminary steps are documented in some detail in [7] and a short but more up to date description may be found in ....

Cellier, F. E., Otter, M. and Elmqvist, H., "Bond Graph Modeling of Variable Structure Systems", Proc. ICBGM'95 (Second International Conference on Bond Graph Modeling and Simulation), Las Vegas, Nevada, January 1995.

....discontinuous changes in system trajectories and or the model structure itself. In this respect, there is much commonality between the hsml project and recent developments by Cellier et al. in the area of object oriented modeling [3] for a detailed view of state event handling see especially [4, 5]. This paper outlines the completion of the first phase in implementing a subset of the hsml concept in a working modeling and simulation environment, matlab [6] Preliminary steps are documented more completely in [7] Here we again focus narrowly on the issues surrounding state event handling in ....

Cellier, F. E., Otter, M. and Elmqvist, H., "Bond Graph Modeling of Variable Structure Systems", Proc. ICBGM'95 (Second International Conference on Bond Graph Modeling and Simulation), Las Vegas, Nevada, January 1995.

....that cause discontinuous changes in system trajectories and or the model structure itself. In this respect, there is much commonalitybetween the hsml project and recent developments by Cellier et al. in the area of object oriented modeling [3] for a detailed view of state events see especially [4, 5]. In conceiving and developing hsml, there was no claim that one cannot rigorously model hybrid systems using certain other, extant languages. For example, acsl [6] can be used to model and simulate state events in hybrid systems with considerable generality; however many other packages ....

Cellier, F. E., Otter, M. and Elmqvist, H., "Bond Graph Modeling of Variable Structure Systems", Proc. ICBGM'95 (Second International Conference on Bond Graph Modeling and Simulation), Las Vegas, Nevada, January 1995.

....that cause discontinuous changes in system trajectories and or the model structure itself. In this respect, there is much commonality between the hsml project and recent developments by Cellier et al. in the area of object oriented modeling [3] for a detailed view of state events see especially [4, 5]. In conceiving and developing hsml, there was no claim that one cannot rigorously model hybrid systems using certain other, extant languages. For example, acsl [6] can be used to model and simulate state events in hybrid systems with considerable generality; however many other packages ....

Cellier, F. E., Otter, M. and Elmqvist, H., "Bond Graph Modeling of Variable Structure Systems", Proc. ICBGM'95 (Second International Conference on Bond Graph Modeling and Simulation), Las Vegas, Nevada, January 1995.

....would be instantaneous. However, when approximating thyristors, relays, clutches or hydraulic valves by such ideal switches, it seems impossible to stick to only one such standardised model. In particular, it seems like the model will have to change depending on the environment of the switch [3]. Hence it is no longer possible to combine ideal mechanism models arbitrarily, and hence it is no simple to make local changes in a model. We will next see how this problem can be better understood and be potentially solved by means of switched bond graphs. 3 Switched bond graphs Switched bond ....

F. Cellier, H. Elmqvist, and M. Otter. Bond graph modeling of variable structure systems. In Proc. of the Second Int. Conf. on Bond Graph Modeling and Simulation (ICBGM'95), Las Vegas, 1995.

....solver. Adopting this approach, the original problem of the modelling process is shifted to that of properly translating a conceptual model into a computational one. Preliminary results obtained using switched bond graphs [20, 16, 13] and similar approaches using, e.g. object oriented modelling [7, 5, 1, 19, 2, 6], indicate that this process can be automated in many cases of practical interest. 3 Switched bond graphs The conceptual modelling language proposed for modeswitching physical systems is referred to as switched bond graphs. One reason for the name is that the language heavily relies on the theory ....

F.E. Cellier, M. Otter, and H. Elmqvist. Bond graph modeling of variable structure systems. In Second International Conference on Bond Graph Modeling and Simulation (ICBGM'95), New Orleans, LA, 1995.

....variety. The equations that are derived from a bond graph are declarative in nature. It is correct that some researchers have introduced so called causality strokes into the bond graph methodology, turning the formerly acausal bond graphs into a causal variety. However, as shown in [Cellier et al. 1995], causality strokes are not necessarily helpful, and, in the case of switching circuits, they are even harmful. Hence it was decided not to augment the bond graphs shown in this article by causality strokes. A third very important feature of bond graphs is that they are modular and hierarchical ....

Cellier, F.E., Otter, M., and Elmqvist H. 1995. Bond graph modeling of variable structure systems. Proc.

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