R-3

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R-3

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Library

Bond Graph

Use

Domains: Continuous. Size: 3-D. Kind: Bond Graphs.

Description

This model is the multiport equivalent of the single dissipative element. Consequently the constitutive equation must be written as a matrix-vector multiplication. This model can have an effort out as well as a flow out causality. In the last case the constitutive equation, as shown below, is simply inverted.

 

effort out causality:

 

p.e = R*p.f;

 

flow out causality:

 

p.f = inverse(R)*p.e;

Interface

Ports

Description

p[3]

Input port of the R-element (columnvector with size 3).

Causality

 

indifferent

 

Parameters

 

R

The friction parameters (matrix of size [3,3]).

Limitations

The flow out equation contains an inverted R matrix. The elements of this matrix should be chosen with care to prevent this matrix from becoming singular.