PWL Dissipation (Dissipative)
Piecewise-linear SISO dissipative component based on the PWL interpolation proposed in [1], (eq (2), known as the Chua interpolation). The file pointed by file argument should contains two lines, each blank separated list of floats for (x, y) values.
PWL Dissipation (Dissipative)
Piecewise-linear SISO dissipative component based on the PWL interpolation proposed in [1], (eq (2), known as the Chua interpolation). The file pointed by file argument should contains two lines, each blank separated list of floats for (x, y) values.
Power variables
flux: Force \(f\) (N)
effort: Velocity \(v\) (m/s)
Arguments
- label : str
- Dissipative label.
- nodes : ('N1', 'N2')
- Positive flux N1->N2.
- parameters : keyword arguments
- Component parameter.
| Key | Description | Unit | Default |
|---|---|---|---|
| file | Path to data file for (w, z) values | string | example.txt |
| start | Index of first value | d.u. | None |
| stop | Index of last value | d.u. | None |
| step | step >= 1 | d.u. | None |
Usage
diss = Dissipative('diss', ('N1', 'N2'), file='example.txt', start=None, stop=None, step=None)
Netlist line
pwl.dissipative diss ('N1', 'N2'): file=example.txt; start=None; stop=None; step=None;
Example
>>> # Import dictionary
>>> from pyphs.dictionary import pwl
>>> # Define component label
>>> label = 'diss'
>>> # Define component nodes
>>> nodes = ('N1', 'N2')
>>> # Define component parameters
>>> parameters = {'file': 'example.txt', # Path to data file for (w, z) values (string)
... 'start': None, # Index of first value (d.u.)
... 'stop': None, # Index of last value (d.u.)
... 'step': None, # step >= 1 (d.u.)
... }
>>> # Instanciate component
>>> component = pwl.Dissipative(label, nodes, **parameters)
>>> # Graph dimensions
>>> len(component.nodes)
2
>>> len(component.edges)
1