Analysis of servomechanisms with nonlinear feedback control

THIS PAPER gives a procedure for the analysis of servomechanisms with nonlinear elements in the feedback link. The method is then extended to the analysis of servomechanisms with nonlinear control in the forward link and nonlinear control in the feedback path. Phase-plane equations representing the equations of the projections of an n-dimensional space trajectory on suitable planes are obtained. These can be solved by the methods detailed in previous papers.1̲3