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Unformatted text preview: a=10 2.5 2 1.5 a=2 a=0.5 1 0.5 a=1 0 0.5 0 5 10 15 20 25 30 We can observe that if the zero is small (a is large), the response exhibit s an overshoot. For smaller but positive values of a, the response is init ially in the direction of the ult imate steadystate. For negat ive values of a, the response shows the inverse (wrong way) behavior. The locat ions of the po les (as lo ng as they are stable) do not play a crit ical ro le in changing the qualitat ive response characteristics. IV. Using the Heat Exchanger system in CStation, § Obtain the transfer funct ions of the process. That is, the TF between the inputs (manipulated variable, disturbance) and the outlet Temperature. § Experiment alternative model structures and analyze the results § Explain, in terms of chemical and phys ical mechanisms, the process response when subject to a disturbance change Heat exchanger Process for testing Fitting FPTD Linear model for Input FPDT Linear model for input Generat ing Data for input Select ion o f FOPDT Linear model for input Generat ing Data for disturbance Data for disturbance Fitting FPTD Linear model for disturbance FPTD Linear model for disturbance Select ion Alternat ive Linear model for disturbance Fitting Alternat ive Linear model for disturbance Fitting Alternat ive Linear model for disturbance Select ion Alternat iv...
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This note was uploaded on 01/12/2014 for the course CHE 4198 taught by Professor Hjortso,m during the Fall '08 term at LSU.
- Fall '08