2016-08-242016-08-242015-09-22http://hdl.handle.net/10919/72764A controller and infrastructure for an impedance analyzer measures responses to perturbations to respective phases of a multi-phase system at an interface between stages thereof (which may be considered as a source and load in regard to each other), such as a multi-phase electrical power system, to determine a transfer function for each phase of the multi-phase system from which the impedance of each of the source and load can be calculated, particularly for assessing the stability of the multi-phase system.application/pdfen-USPatenthttp://pimg-fpiw.uspto.gov/fdd/31/407/091/0.pdf136185131/1G01R27/02G01R27/16H02J3/389140731