Into Stability: Walter R. Evans and the Story of Root Locus

Into Stability: Walter R. Evans and the Story of Root Locus tells the remarkable story of a quiet but transformative breakthrough in engineering-one that reshaped modern control systems and helped guide technological progress during the Cold War.

In the late 1940s, as engineers struggled to design increasingly complex feedback systems for aircraft, radar, and emerging technologies, stability remained one of the most difficult problems in control engineering. Walter Evans, working with a rare...