Phase-plane trajectories for linear-p.c.m.-oscillator control systems
P.C. Parks, M.R. Miller · Electronics Letters · 1968
The existence of more than one operating mode for these systems is well known. Phase-plane diagrams are shown to be useful in deducing the existence and stability of these modes as the line delays and initial uncontrolled oscillator frequencies are varied. Simple 3-station networks are considered here, but the technique may be generalised to larger networks.