BME 639 Lecture Notes - Lecture 1: Domain Analysis
18 Oct 2017
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Document Summary
Recall that the implicit control objective is to ensure that the closed loop system is stable. Control objective is to force the process output to follow, or track, a desired reference signal, even in presence of an unexpected, and unwanted, disturbance. The reference signal may be constant, in which case we refer to the control system as the regulator system, or varying, in which case we refer to the control system as the tracking system. Regulation is when the constant reference signal is equal to zero. In regulation, the most important objective is to effectively reject disturbances. In case of tracking, the accuracy, or quality, of the response (i. e. how close the output is to the reference) is important both in the steady state and in transient. Examples of signals steps, ramps, sinusoids, parabolic, and any arbitrary time varying signals. Invariant (lti) system, an arbitrary time signal can be seen as a superposition of a set of standard signals.
