Fall 2001 16.311-1 Introduction d(t) r(t) e(t) yt K(s Goal: Design a controller K(s so that the system has some desired characteristics. Typical objectives Stabilize the system( Stabilization) Regulate the system about some design point(Regulation Follow a given class of command signals(Tracking) Reduce the response to disturbances(Disturbance Rejection Typically think of closed-loop control > so we would analyze the closed-loop dynamics Open-loop control also possible(called"feedforward")-more prone to modeling errors since inputs not changed as a result of measured error Note that a typical control system includes the sensors, actuators and the control lay The sensors and actuators need not always be physical devices (e. g, economic systems) a good selection of the sensor and actuator can greatly simplify the control design process Course concentrates on the design of the control law given the rest of the system(although we will need to model the system)Fall 2001 16.31 1—1 Introduction K(s) G(s) - 6 ? — u(t) r(t) e(t) y(t) d(t) • Goal: Design a controller K(s) so that the system has some desired characteristics. Typical objectives: — Stabilize the system (Stabilization) — Regulate the system about some design point (Regulation) — Follow a given class of command signals (Tracking) — Reduce the response to disturbances. (Disturbance Rejection) • Typically think of closed-loop control → so we would analyze the closed-loop dynamics. — Open-loop control also possible (called “feedforward”) — more prone to modeling errors since inputs not changed as a result of measured error. • Note that a typical control system includes the sensors, actuators, and the control law. — The sensors and actuators need not always be physical devices (e.g., economic systems). — A good selection of the sensor and actuator can greatly simplify the control design process. — Course concentrates on the design of the control law given the rest of the system (although we will need to model the system)