control.NyquistResponseData
- class control.NyquistResponseData(count, contour, response, dt, sysname=None, return_contour=False)[source]
Nyquist response data object.
Nyquist contour analysis allows the stability and robustness of a closed loop linear system to be evaluated using the open loop response of the loop transfer function. The NyquistResponseData class is used by the
nyquist_response()function to return the response of a linear system along the Nyquist ‘D’ contour. The response object can be used to obtain information about the Nyquist response or to generate a Nyquist plot.- count
Number of encirclements of the -1 point by the Nyquist curve for a system evaluated along the Nyquist contour.
- Type
integer
- contour
The Nyquist ‘D’ contour, with appropriate indendtations to avoid open loop poles and zeros near/on the imaginary axis.
- Type
complex array
- response
The value of the linear system under study along the Nyquist contour.
- Type
complex array
- dt
The system timebase.
- Type
None or float
- sysname
The name of the system being analyzed.
- Type
str
- return_contour
If true, when the object is accessed as an iterable return two elements”: count (number of encirlements) and contour. If false (default), then return only count.
- Type
bool
Methods
__init__(count, contour, response, dt[, ...])plot(*args, **kwargs)