In the previous lecture we showed how to obtain the transfer function of a closed loop system. In addition, we derived the transfer function of a PID controller. In this lecture we will discuss the response of a closed loop system, final value theorem and tracking problem.
We will deal with block diagrams of the form shown below. Comparing this diagram with the one given in the previous lecture we note that the sensor block S(s) is missing here. The closed loop system below is called a unity feedback system since S(s) = 1. In practice this can be easily achieved by adding an amplifier to the measurement system in order to make the measured and actual outputs equal in value. The units of two outputs will be usually different.
We will deal with block diagrams of the form shown below. Comparing this diagram with the one given in the previous lecture we note that the sensor block S(s) is missing here. The closed loop system below is called a unity feedback system since S(s) = 1. In practice this can be easily achieved by adding an amplifier to the measurement system in order to make the measured and actual outputs equal in value. The units of two outputs will be usually different.
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