control.dcgain¶

control.dcgain(sys)[source]¶

Return the zero-frequency (or DC) gain of the given system.

Returns: gain – The zero-frequency gain, or (inf + nanj) if the system has a pole at the origin, (nan + nanj) if there is a pole/zero cancellation at the origin.
Return type: ndarray

Examples

>>> G = ct.tf([1], [1, 2])
>>> ct.dcgain(G)                                            
0.5