Define dead time in process control. Explain its effect on system stability.
[3 marks]What causes inverse response? Explain with mathematical arguments.
[4 marks]Derive the transfer function of non interacting two tank system with linear resistance element.
[7 marks]With the help of suitable example, explain servo and regulatory control system.
[3 marks]Explain any one method for obtaining First Order Plus Time Delay (FOPTD) approximate model for processes.
[4 marks]Derive the mathematical model of continuous stirred tank heater with its process loop.
[7 marks]Discuss two position control with and without neutral zone. What is the effect of neutral zone on controller output?
[7 marks]Explain direct and reverse mode of control action with the help of example.
[3 marks]Explain multi position control in brief.
[4 marks]Analyze the closed loop response of first order system with proportional control to unit step change in set point and unit step change in process load.
[7 marks]An integral controller is used for speed control with a set point of rpm within a range of 10-15 rpm. Initially, at zero error the controller output is 22%. The constant K = −0.15% controller output per second per percentage error. If I the speed jumps to 13.5 rpm, calculate the controller output after seconds for a constant e . p
[2 marks]What is offset in case of proportional control action? How offset can be eliminated? Explain.
[4 marks]Explain the composite PI controller with equation, transfer function and draw the response of PI controller to step input of error.
[7 marks]What is self regulation? Give an example of self regulating process.
[3 marks]Briefly discuss velocity form of discrete PID controller. Also state its advantages over position form of the algorithm.
[4 marks]Explain Integral wind up and anti-wind up scheme to prevent it.1
[7 marks]Draw and explain unit step response of an integrating process.
[3 marks]Briefly discuss position form of discrete PID controller. Also discuss its limitations.
[4 marks]What do you mean by tuning of controller? Explain Z-Nmethod of tuning.
[7 marks]Show any one configuration of ratio control scheme.
[3 marks]Briefly discuss override control scheme.
[4 marks]Draw the basic block diagram of feed forward control. Write the difference between feedback and feed forward control scheme.
[7 marks]Briefly explain air-fuel ratio control for drum boiler.
[3 marks]Briefly explain the split range control scheme.
[4 marks]Draw the basic block diagram of cascade control scheme and discuss in detail with suitable process example.2
[7 marks]