R05321001-automation-of-industrial-processes

Set No. 1

Code No: R05321001

III B.Tech Supplimentary Examinations, Aug/Sep 2008 AUTOMATION OF INDUSTRIAL PROCESSES (Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Explain how Analog Process Control loops cab be replaced by digital computer control loops? (b) List out the advantages of DDC over conventional analog Controller

[8+8]

2. (a) Explain how data bus works in a DCS. (b) Discuss in brief about Intelligent field bus device (IFD)?

[8+8]

3. (a) A discrete system is having the following transfer function, T(Z) = (Z 2 +4Z+3)/ (Z 3 +3Z 2 +2Z) Obtain the discrete state model and discuss about its controllability and observability (b) Give the structure of a self tuning regulator(STR) and explain how the controller parameters, are set [8+8] 4. (a) What is Dead Beat Algorithm? Explain DB algorithm for a second order system considering Dead time? (b) What is the effect of sampling on the response of a closed loop system? How do you select the sampling rate? [10+6] 5. Explain the following: (a) Dynamic feed forward control algorithm. (b) Static feed forward control algorithm. 6. Explain in detail the essential components of Adaptive control system. 7. Explain the concept of Intelligent control with a neat block diagram.

[8+8] [16] [16]

8. (a) What is the difference between a PLC and DCS. (b) How are PLC and DCS systems integrated for industrial process control.[4+12] ⋆⋆⋆⋆⋆

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Set No. 2

Code No: R05321001

III B.Tech Supplimentary Examinations, Aug/Sep 2008 AUTOMATION OF INDUSTRIAL PROCESSES (Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Write a short notes on i. Artificial Intelligence based system. ii. Expert system controller. (b) Discuss the hierarchy of DCS.

[10+6]

2. (a) Discuss the functional requirements of a Distributed Process Control? (b) ‘Communication’ plays a Critical role in DCS. Discuss?

[10+6]

3. (a) A discrete system is having the following transfer function, T(Z) = (Z 2 +4Z+3)/ (Z 3 +3Z 2 +2Z) Obtain the discrete state model and discuss about its controllability and observability (b) Give the structure of a self tuning regulator(STR) and explain how the controller parameters, are set [8+8] 4. (a) Design a Dead Beat controller for a process whose transfer function is given by Gp(s)=1/(0.4s+1). Also obtain the equation for nth sampled controller output. (Assume T=0.1 sec) (b) Write the properties of state transition matrix both in continuous and discrete time domain. [12+4] 5. Explain feed forward controller operation with suitable example.

[16]

6. What is predictive control? Discuss with the help of block diagrams different types of popular predictive control systems used in industrial applications. [4+12] 7. What is an intelligent control used for the process control and monitoring? How the control algorithm is developed in intelligent control? [8+8] 8. (a) What is a programmable logic controller (PLC)? (b) Explain the basic structure of a PLC with a block diagram. ⋆⋆⋆⋆⋆

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[4+12]

Set No. 3

Code No: R05321001

III B.Tech Supplimentary Examinations, Aug/Sep 2008 AUTOMATION OF INDUSTRIAL PROCESSES (Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) With neat block diagram, discuss in brief about SCADA. (b) Draw the functional block diagram of Computer Control system and explain the importance of each block in it? [8+8] 2. (a) Discuss the functional requirements of a Distributed Process Control? (b) ‘Communication’ plays a Critical role in DCS. Discuss?

[10+6]

3. (a) What is meant by optimum controller settings? Describe the procedure to controller settings that give minimum ISE. (b) How is process reaction curve plotted? How do you use it for controller tuning? What is process reaction curve methods (PRC) of controller tuning. Explain how PRC method can be used to set the parameter of P, PI & PID Controllers? [8+8] 4. (a) Explain the first order modelling of processes without delay and with pure delay. Also obtain the equation for nth sampled output. (b) Discus briefly about the desirable characteristics of digital control Algorithms. [12+4] 5. Explain different types of feed forward control algorithms.

[16]

6. What are adaptive control adjustments? With block diagrams explain the functions of each of them. [16] 7. Explain with neat sketch application of statistical process control for computer aided process control functions. Give examples. [16] 8. How PLC is programmed? Discuss with a neat sketch the ladder diagram approach of a PLC programming. [16] ⋆⋆⋆⋆⋆

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Set No. 4

Code No: R05321001

III B.Tech Supplimentary Examinations, Aug/Sep 2008 AUTOMATION OF INDUSTRIAL PROCESSES (Electronics & Instrumentation Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) With neat block diagram, discuss in brief about SCADA. (b) Draw the functional block diagram of Computer Control system and explain the importance of each block in it? [8+8] 2. (a) Discuss about different communication protocols associated with Smart Sensors? (b) Write the advantages of Smart Sensors.

[8+8]

3. (a) A discrete system is having the following transfer function, T(Z) = (Z 2 +4Z+3)/ (Z 3 +3Z 2 +2Z) Obtain the discrete state model and discuss about its controllability and observability (b) Give the structure of a self tuning regulator(STR) and explain how the controller parameters, are set [8+8] 4. (a) What is Dead Beat Algorithm? Explain DB algorithm for a second order system considering Dead time? (b) What is the effect of sampling on the response of a closed loop system? How do you select the sampling rate? [10+6] 5. Explain the design procedure of static feed forward controller with suitable example. [16] 6. What is cascade control system? When the cascade control system is used in process control applications? Explain with an example. [4+4+8] 7. Write short notes on the following: (a) Smith predictor algorithm. (b) Analytical predictor algorithm.

[8+8]

8. With neat sketch discuss the PLC network that is used for communication of plant parameters in a process control environment. [16] ⋆⋆⋆⋆⋆

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