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Navigation: Library > Bond Graph > 2d > MR-2 |
  
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Bond Graph
Domains: Continuous. Size: 2-D. Kind: Bond Graphs.
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;
Ports |
Description |
p[2] |
Input port of the R-element (columnvector with size 2). |
Causality |
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indifferent |
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Input |
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r[2,2] |
The (modulated) friction/resistor parameter (size [2,2]). |
Parameters |
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R |
The friction parameters (matrix of size [2,2]). |
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.