This paper discusses a technique for modeling discontinuous physical systems that combines the bond graph energy-ow modeling scheme with a signal-ow modeling scheme augmented with nite state automata. It enables the generation of complex, multi-mode behaviors without violating the energy ow principles imposed by bond graphs. Mode switching is achieved by controlled junctions which can take on o...

In this paper we state the properties of fault diagnosis through differential algebra and how it can be used in conjunction with the Bond graphs modeling to design fault tolerant controllers. This controller is applied to a DC motor because it is a well known system has a wide range of applications. The faults are estimated through a reduced order observer to reject their effect on the system. ...

In 2014, some scholars showed that every 2-connected claw-free graph G with independence number α(G)≤3 is Hamiltonian one exception of family graphs. If a nontrivial path contains only internal vertices degree two and end not two, then we call it branch. A set S branches called branch cut if delete all edges leading to more components than G. We use bond denote minimal cut. branch-bond has an o...

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 cont...

This papers represents one of the most widely challenging control problems. The accepted blockdiagrams in automatic used to describe processes have been replaced by based on bond graphmodeling. graph model physical hydraulic process is presented. goal research toobtain a with and without knowledge mathematical model, which obtain asimulation prediction model. Due feedback effect liquid pipes (p...

A discussion of duality continues the development of a mathematical theory for bond graphs as combinatorial structures. The dual of a bondgraph is de$ned and its associated vector spaces are the co-spaces of the original bond graph. The relationship between the algebraic structures and their duals is explored. The theory is used to justfy the construction of a simplified bond graph, the proper ...

In many applications that require physical interaction with humans or other physical environments, passivity is a useful property to have in order to improve safety and ease of use. Many hydraulic applications (e.g. a human operated excavator) fall into this category. In a previous work, the passivity property of a directional hydraulic flow control valve, and methods for making the valve in a ...

This work addresses the construction of a fourwheel, nonlinear vehicle dynamic bond graph model and its implementation in the 20sim modeling and simulation environment. Nonlinear effects arising from the coupling of vertical, longitudinal and lateral vehicle dynamics, as well as geometric nonlinearities coming from the suspension system are taken into account. Transmission and (a simplified) en...

This article, together with two companion papers, offers a general methodology for modeling thermodynamical phenomena using true, rather than pseudo-, bond graphs. This paper deals in particular with the diÆcult problem of modeling mass ows in a thermodynamic sense, i.e. with the formulation of mathematical models of convective ows. No quasi-stationary or ow-equilibrium assumptions were made, s...

The aim of this study was to investigate in how far the way the specimen is fixed to the testing device influences the micro-tensile bond strength of adhesives to dentin. Compared to a flat jig, a notched jig enables the specimen to be aligned easier and more accurately perpendicular to the interface, thereby concentrating better the tensile stress at the actual interface. A notched jig yielded...