Library Reference

Block

class sigflow.blocks.Block(label=None)

Bases: object

A general block base class

label

Label for this block.

Type: str or None

inputs

The input of this block.

Type: float or array

output

The output of this block, calculated by self._i2o()

Type: float or array

ninput

The number of inputs

Type: int

noutput

The number of outputs

Type: int

Note

Block diagram representation:

inputs –> [block] –> output

Call this block to use:

output = block(input)

property inputs: Input of the block.

property ninput: Number of inputs

property noutput: Number of inputs

property output: Output of the block

LTI Systems

class sigflow.blocks.LTI(tf, dt, label=None)

Bases: sigflow.blocks.base.Block

An LTI system class

Parameters

tf (control.TransferFunction) – The transfer function representation of the LTI system.
dt (float) – The sampling time in seconds.
label (str, optional) – Label for this filter. Defaults to None.

property dt: Sampling time

property input: Input of the LTI system

property tf: The transfer function represenstation of the LTI system

Junction

class sigflow.blocks.Junction(signs='++', label=None)

Bases: sigflow.blocks.matrix.Matrix

A summing junction class

Note

Block diagram representation for Junction(signs=”+-“):

input 1 -> (+ -) -> output
              ^
              |
input 2 -------

Block diagram representation for Junction(signs=”+-+”):

input 1 -> (+ - +) -> output
              ^ ^
              | |
input 2 ------- |
input 3 ---------

property signs: Signs of the inputs

Matrix

class sigflow.blocks.Matrix(matrix=None, label=None)

Bases: sigflow.blocks.base.Block

A Matrix class

label

Label of this matrix

Type: str or None

matrix

The matrix.

Type: array or None

input

The input array

Type: array

output

The output array

Type: array

ninput

The number of inputs defined by the number of columns of the matrix. Calculated, can’t set.

Type: int

noutput

The number of outputs defined by the number of rows of the matrix. Calculated, can’t set.

Type: input

property matrix: The representing matrix.

property ninput: Number of inputs

property noutput: Number of outputs