A Definition of the Bond Graph Language

1972 ◽  
Vol 94 (3) ◽  
pp. 179-182 ◽  
Author(s):  
R. C. Rosenberg ◽  
D. C. Karnopp
Keyword(s):  
Bond Graph ◽  
Graph Language ◽  
Definition Of

Bond graph observer for mode identification and discernibility study

2018 ◽  
Vol 41 (7) ◽  
pp. 1791-1810
Author(s):  
Eya Fathallah ◽  
Nadia Zanzouri
Keyword(s):  
Current Mode ◽  
Simple Calculation ◽  
Bond Graph ◽  
The Other ◽  
Identification Procedure ◽  
Graphical Approach ◽  
Mode Identification ◽  
Graph Language ◽  
Definition Of ◽  
Lyapunov Second Method

This paper presents a new concept for calculating of the bond graph observer gains based on a graphical approach that investigates the Lyapunov Second Method in order to conclude about the observer stability and to search for the adequate gains that stabilize the observer. This new observer is used in the mode identification procedure. In fact, the observer’s residues allow the differentiation between the current mode and the other system modes. In order to guarantee the efficiency of the mode identification procedure, a new bond graph approach is proposed. It concerns the discernibility between the modes in bond graph language. First, it deals with the R-discernibility that introduces the definition of the discernibility through the structural parity residual then returns to a simple calculation of some matrices’ ranks in bond graph language. Second, another bond graph technique is applied to define the discernibility throughout the equivalency between the realizations.

Pseudo Bond Graph System Modelling of Electric Air Compressors With Energy Recovery for Fuel Cell Applications

2020 ◽  
Author(s):  
Sebastian Lück ◽  
Jan Göing ◽  
Christoph Bode ◽  
Jens Friedrichs
Keyword(s):  
Fuel Cell ◽  
Bond Graph ◽  
System Modelling ◽  
The Novel ◽  
Surge Margin ◽  
Previous Formulation ◽  
Acceleration And Deceleration ◽  
Graph System ◽  
Definition Of ◽  
Air Compressors

Abstract In this paper, the novel machine type of an electric air compressor (EAC) for fuel cell applications is investigated and simulated using a Pseudo Bond Graph (PBG) approach. Initially, the system along with its miscellaenous components is derived in the Pseudo Bond Graph notation. Subsequently, the multiphysical connections of fluid, thermal and electrical domains are highlighted. In addition, a derivation for an extended definition of the Pseudo Bond Graph theory’s inertia I element is presented. In contrast to the previous formulation, it takes into account the effects of compressibility which were previously neglected. The simulations are carried out using in-house simulation tool ASTOR (AircraftEngine Simulation for Transient Operation Research) and feature different transient acceleration and deceleration manoeuvres with varying manoeuvre duration. It is shown that manoeuvre duration significantly influences transient performance such as the surge margin which is found to decrease by up to 9% in comparison to the steady operating line. In addition, deceleration is identified as the most critical operating condition.

The Usage of Bond Graphs Methodology for Mechanical Systems Designing

2015 ◽  
Vol 816 ◽  
pp. 349-356
Author(s):  
Darina Hroncová ◽  
Alexander Gmiterko ◽  
Tomáš Lipták ◽  
František Menda
Keyword(s):  
Classical Method ◽  
Mechanical Systems ◽  
Dc Motor ◽  
Bond Graph ◽  
Bond Graphs ◽  
Introductory Part ◽  
Definition Of ◽  
Simulation Scheme

The article deals with the issue of the usage bond graphs at modeling of mechanical systems. In contrast with the classical method, where the equations for individual components are created first and then on their basis the simulation scheme is derived, here the described method uses the reverse procedure. In the introductory part of article the bond graph notation is defined and next basic types of multi-ports are explained. The last part consists of definition of port and power bond between ports that are explained on example of DC motor with separate excitation.

scholarly journals Comprehensive definition of oxidation state (IUPAC Recommendations 2016)

2016 ◽  
Vol 88 (8) ◽  
pp. 831-839 ◽  
Author(s):  
Pavel Karen ◽  
Patrick McArdle ◽  
Josef Takats
Keyword(s):  
Transition Metals ◽  
Oxidation State ◽  
Chemical Compound ◽  
Bond Graph ◽  
Electron Configuration ◽  
Definition Of ◽  
The Relationship

AbstractOxidation state (OS) is defined using ionic approximation of bonds. Two principal algorithms are outlined for OS determination in a chemical compound described by a Lewis formula or bond graph. Typical origins of ambiguous OS values are pointed out, and the relationship between OS and the dn electron configuration of transition metals is commented on.

scholarly journals Complementary Use of BG and EMR Formalisms for Multiphysics Systems Analysis and Control

2012 ◽  
Author(s):  
Zeineb Chikhaoui ◽  
Julien Gomand ◽  
François Malburet ◽  
Pierre-Jean Barre
Keyword(s):  
Flight Control ◽  
Systems Analysis ◽  
Control Structure ◽  
Bond Graph ◽  
Modeling And Analysis ◽  
Helicopter Flight ◽  
Lumped Parameter ◽  
Lumped Parameter Modeling ◽  
Definition Of ◽  
And Control

In this paper, a complex multiphysics system is modeled using two different energy-based graphical techniques: Bond Graph and Energetic Macroscopic Representation. These formalisms can be used together to analyze, model and control a system. The BG is used to support physical, lumped-parameter modeling and analysis processes, and then EMR is used to facilitate definition of a control structure through inversion-based methodology. This complementarity between both of these tools is set out through a helicopter flight control subsystem.

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