control.get_input_ff_index

control.get_input_ff_index(sys)[source]

Input feedforward passivity (IFP) index for a system.

The input feedforward passivity (IFP) is the largest gain that can be placed in negative parallel interconnection with a system such that the new interconnected system is passive.

Parameters
sysLTI

System to be checked.

Returns
float

The IFP index.