The general controller design and identity analysis in classical dynamics

A state observer based on classical dynamics and a closed loop control system consisted of the state observer are constructed. A general controller based on classical dynamics is constructed, which is explained in classical dynamics: the controlled plant output locus is controlled and led to the desired output locus using feedback control of position, speed and acceleration of the general controller. The cases study show the general controller can improve performances and qualities of control system. At the same time, the paper analyses that PID controller, inner model controller and robust controller are identical in classical dynamics, and gives some improved methods for designing these controllers.