1.2 An example The human being is a feedback control system, let us consider that the objective is to reach for an object on a desk as one is reaching for the object, the brain sends out a signal to the arm to perform the task The eyes serve as a sencing device which feed back continuously the position of the hand The distance between the hand and the object is the error, which is eventually brought to zero as the hand reaches the object. This is a typical example of closed-loop control 2022-2-3 82022-2-3 8 1.2 An example ¨ The human being is a feedback control system ,let us consider that the objective is to reach for an object on a desk ,As one is reaching for the object ,the brain sends out a signal to the arm to perform the task .The eyes serve as a sencing device which feed back continuously the position of the hand .The distance between the hand and the object is the error ,which is eventually brought to zero as the hand reaches the object .This is a typical example of closed-loop control