A general theory for determination of the stability of linear lumped-parameter multiple-loop servomechanisms (and other feedback systems)

THE main purpose of this paper is to set out the details of a general theory enabling direct determination of the stability of linear lumped-parameter multiple-loop servomechanisms (and other feedback systems) which is broader in scope, more direct in application, more powerful in use, and yields greater insight to the physical functioning of both the system as an entity and its subloops than does presently available theory.