PWL Storage (Storage)
Piecewise-linear SISO storage 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, H) or (x, dxH) values. If (x, dxH) values are provided, the resulting interpolation must be integrated to yield a (x, H) mapping (see integrate parameter below).
PWL Storage (Storage)
Piecewise-linear SISO storage 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, H) or (x, dxH) values. If (x, dxH) values are provided, the resulting interpolation must be integrated to yield a (x, H) mapping (see integrate parameter below).
Power variables
flux: Force \(f\) (N)
effort: Velocity \(v\) (m/s)
Arguments
- label : str
- Storage label.
- nodes : ('N1', 'N2')
- Positive flux N1->N2.
- parameters : keyword arguments
- Component parameter.
| Key | Description | Unit | Default |
|---|---|---|---|
| file | Path to data file for (x, H) or (x, dxH) values | string | example.txt |
| integrate | If True, data is (x, dxH) and integrate to (x, H) | bool | False |
| start | Index of first value | d.u. | None |
| stop | Index of last value | d.u. | None |
| step | step >= 1 | d.u. | None |
Usage
stor = Storage('stor', ('N1', 'N2'), file='example.txt', integrate=False, start=None, stop=None, step=None)
Netlist line
pwl.storage stor ('N1', 'N2'): file=example.txt; integrate=False; start=None; stop=None; step=None;
Example
>>> # Import dictionary
>>> from pyphs.dictionary import pwl
>>> # Define component label
>>> label = 'stor'
>>> # Define component nodes
>>> nodes = ('N1', 'N2')
>>> # Define component parameters
>>> parameters = {'file': 'example.txt', # Path to data file for (x, H) or (x, dxH) values (string)
... 'integrate': False, # If True, data is (x, dxH) and integrate to (x, H) (bool)
... '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.Storage(label, nodes, **parameters)
>>> # Graph dimensions
>>> len(component.nodes)
2
>>> len(component.edges)
1