A Dynamic Sizing Methodology in the Context of an Automotive Application

2002 ◽  
Author(s):  
Olivier Mechin ◽  
Wilfrid Marquis-Favre ◽  
Serge Scavarda ◽  
Pierre Ferbach
Keyword(s):  
Dynamic Behavior ◽  
Bond Graph ◽  
Inverse Model ◽  
Graph Representation ◽  
Automotive Application ◽  
Car Suspension ◽  
System Variables

This paper deals with the application of a dynamic sizing methodology for car suspensions for different given aims of dynamic behavior aims in braking situations. The methodology is based on the establishment of the inverse model from the bond graph representation of the system by using the bicausality concept. By means of an automotive car suspension example and for specific dynamic trajectories imposed on the inverse model, we show how information on the system variables can be obtained in a dynamical sizing phase.

A representation for planar point contact joints in the multibody mechanical bond graph library

1998 ◽  
Vol 212 (4) ◽  
pp. 305-313 ◽  
Author(s):  
W Favre ◽  
S Scavarda
Keyword(s):  
Point Contact ◽  
Bond Graph ◽  
The Body ◽  
Graph Representation ◽  
Kinematic Constraints ◽  
Contact Joint ◽  
Cam Follower ◽  
Mechanical Bond ◽  
Junction Structure ◽  
Two Bodies

In this paper a bond graph representation of the point contact joint between two bodies with any outline curves and in planar motion is proposed. The body geometry and frames are described, the kinematic constraints attached to the point contact joint are identified and the bond graph junction structure is deduced. The example of an elliptic cam-follower is used to illustrate the bond graph representation. In particular this shows the need for the simulation to add strong damping and very stiff elements to the system.

State-Space Formulation for Bond Graph Models of Multiport Systems

1971 ◽  
Vol 93 (1) ◽  
pp. 35-40 ◽  
Author(s):  
R. C. Rosenberg
Keyword(s):  
State Space ◽  
Bond Graph ◽  
Graph Representation ◽  
Initial System ◽  
Field Equations ◽  
Graph Models ◽  
Reduction Procedure ◽  
Space Formulation ◽  
Systematic Reduction

A novel procedure for systematically generating state-space equations for multiport systems is presented. The method is based upon a bond graph representation of the system and causal manipulation of the field equations. Principal advantages of the method are the ability to anticipate formulation properties before writing equations, the availability of a simple check for correctness of the initial system relations, and the specification of a systematic reduction procedure for obtaining state-space equations in terms of energy variables.

A bicausal bond graph representation of operational amplifiers

2003 ◽  
Vol 217 (1) ◽  
pp. 49-58 ◽  
Author(s):  
P J Gawthrop ◽  
D Palmer
Keyword(s):  
Operational Amplifier ◽  
Mechanical Systems ◽  
Graph Model ◽  
Bond Graph ◽  
Electromechanical System ◽  
Graph Representation ◽  
Operational Amplifiers ◽  
Electronic Circuits ◽  
Graph Interpretation ◽  
Virtual Earth

The virtual earth concept, well known to designers of active electronic circuits with operational amplifier components, is shown to have a novel bicausal bond graph interpretation. This leads to simplified bond graph modelling of such circuits. Some simple operational amplifier circuits, together with a more complex active filter, are used to illustrate the approach. A complex electromechanical system shows that the method is useful in creating a unified bond graph model of systems involving both analogue electronic and mechanical systems.

Zero Dynamics of Physical Systems From Bond Graph Models—Part I: SISO Systems

1999 ◽  
Vol 121 (1) ◽  
pp. 10-17 ◽  
Author(s):  
S. Y. Huang ◽  
K. Youcef-Toumi
Keyword(s):  
System Analysis ◽  
Mimo Systems ◽  
Geometric Approach ◽  
Bond Graph ◽  
Graph Representation ◽  
Zero Dynamics ◽  
Feedback Systems ◽  
State Equations ◽  
Graph Models ◽  
Physical Systems

Zero dynamics is an important feature in system analysis and controller design. Its behavior plays a major role in determining the performance limits of certain feedback systems. Since the intrinsic zero dynamics can not be influenced by feedback compensation, it is important to design physical systems so that they possess desired zero dynamics. However, the calculation of the zero dynamics is usually complicated, especially if a form which is closely related to the physical system and suitable for design is required. In this paper, a method is proposed to derive the zero dynamics of physical systems from bond graph models. This method incorporates the definition of zero dynamics in the differential geometric approach and the causality manipulation in the bond graph representation. By doing so, the state equations of the zero dynamics can be easily obtained. The system elements which are responsible for the zero dynamics can be identified. In addition, if isolated subsystems which exhibit the zero dynamics exist, they can be found. Thus, the design of physical systems including the consideration of the zero dynamics become straightforward. This approach is generalized for MIMO systems in the Part II paper.

Sign in / Sign up

Export Citation Format

Share Document