Feedback control systems is an important course in aerospace engineering, chemical engineering, electrical engineering, mechanical engineering, and mechatronics engineering, to name just a few. Feedback control systems improve the system's behavior so the desired response can be achieved. This paper is concerned with the design of a robust L 2 gain state derivative feedback controller for an active suspension system. An uncertain quarter vehicle model is used to analyze vehicle suspension performance. - Control Systems Design Performance and Commissioning Issues Control Systems Engineering 4th Edition By rules for plotting the root locus. PDF-7e9df86e Feedback Control Systems Phillips Solution Manual.