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This course introduces the fundamental concepts of feedback control system. A feedback control system is a system whose output is controlled using its measurement as a feedback signal. This feedback signal is compared with a reference signal to generate an error signal which is filtered by a controller to produce the system's control input. Control is used to modify the behavior of a system so it behaves in a specific desirable way over time. These are being accomplished today by control methods and what automatic control systems are designed to do, without human intervention. Control is used whenever quantities such as speed, altitude, temperature, or voltage must be made to behave in some desirable way over time. This subjects provides an introduction to control system design