MR-2

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MR-2

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Library

Bond Graph

Use

Domains: Continuous. Size: 2-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. The friction/resistor parameter can be set to a (fluctuating) value, given by an input signal.

 

effort out causality:

 

p.e = r*p.f;

 

flow out causality:

 

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

Interface

Ports

Description

p[2]

Input port of the R-element (columnvector with size 2).

Causality

 

indifferent

 

Input

 

r[2,2]

The (modulated) friction/resistor parameter (size [2,2]).

Parameters

 

R

The friction parameters (matrix of size [2,2]).

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.