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QUESTION 9 This question consists of two parts each relating in part to the Experimental Template program used in the Instrumentation and Control laboratory. (i)
QUESTION 9 This question consists of two parts each relating in part to the Experimental Template program used in the Instrumentation and Control laboratory. (i) Someone has written a working program which manipulates an input valve (MV) and measures and displays the pressure in the air tank (PV). From this starting point, itemize the major steps you would perform to obtain an empirical dynamic model of the system (ii) Provide a brief comment on how the auto tuning "relay" controller was implemented in LabVIEW in the laboratory session concemed with PID tuning. List the major components/steps which the controller did and how it was achieved in LabVIEW. QUESTION 10 (i) Consider a process having a gain of 2 and time constant of 1. Assume in front of this process is a perfect setpoint tracking feedforward controller. Ignoring whether the controller is realizable or not, if a unit step is given to this system sketch the reponse. (ii) Consider a cascaded control system consisting of 2 proportional only controllers, function. QUESTION 11 In feedforward control, it is sometimes necessary to introduce a "filter" into the controllers. Explain why this is needed and what is this filter. (i) (i) For the same controller parameters, indicate below the order of each of the controllers (P, PI PD) in terms of the effect on the stability in the closed loop Most Stable Middle Stability Least Stable: QUESTION 9 This question consists of two parts each relating in part to the Experimental Template program used in the Instrumentation and Control laboratory. (i) Someone has written a working program which manipulates an input valve (MV) and measures and displays the pressure in the air tank (PV). From this starting point, itemize the major steps you would perform to obtain an empirical dynamic model of the system (ii) Provide a brief comment on how the auto tuning "relay" controller was implemented in LabVIEW in the laboratory session concemed with PID tuning. List the major components/steps which the controller did and how it was achieved in LabVIEW. QUESTION 10 (i) Consider a process having a gain of 2 and time constant of 1. Assume in front of this process is a perfect setpoint tracking feedforward controller. Ignoring whether the controller is realizable or not, if a unit step is given to this system sketch the reponse. (ii) Consider a cascaded control system consisting of 2 proportional only controllers, function. QUESTION 11 In feedforward control, it is sometimes necessary to introduce a "filter" into the controllers. Explain why this is needed and what is this filter. (i) (i) For the same controller parameters, indicate below the order of each of the controllers (P, PI PD) in terms of the effect on the stability in the closed loop Most Stable Middle Stability Least Stable
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