control.matlab.feedback¶

control.matlab.
feedback
(sys1, sys2=1, sign=1)¶ Feedback interconnection between two I/O systems.
Parameters:  sys1 (scalar, StateSpace, TransferFunction, FRD) – The primary process.
 sys2 (scalar, StateSpace, TransferFunction, FRD) – The feedback process (often a feedback controller).
 sign (scalar) – The sign of feedback. sign = 1 indicates negative feedback, and sign = 1 indicates positive feedback. sign is an optional argument; it assumes a value of 1 if not specified.
Returns: out
Return type: Raises: ValueError
– if sys1 does not have as many inputs as sys2 has outputs, or if sys2 does not have as many inputs as sys1 has outputsNotImplementedError
– if an attempt is made to perform a feedback on a MIMO TransferFunction object
See also
Notes
This function is a wrapper for the feedback function in the StateSpace and TransferFunction classes. It calls TransferFunction.feedback if sys1 is a TransferFunction object, and StateSpace.feedback if sys1 is a StateSpace object. If sys1 is a scalar, then it is converted to sys2’s type, and the corresponding feedback function is used. If sys1 and sys2 are both scalars, then TransferFunction.feedback is used.