Instrumentation & Control principles
Select an application of a closed loop control system. Explain the complete operation process of the system with the control system theories you have learnt. Use block diagrams and equations to explain.
(Identify the main components of the control systems, parameters being controlled, parameters monitored, relationships between parameters, assumptions on system modelling, practical implementation and operation of the system)
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1.(a)Explain an application of closed loop temperature control and pressure controls system in an oil refinery...
1.(a)Explain an application of closed loop temperature control and pressure controls system in an oil refinery (b)Describe the two processes with block diagrams. (c). Select the industrial standard components used to develop the above systems and specification of each components
2. We wish to control the speed of the tumbler in a clothes dryer. To do...
2. We wish to control the speed of the tumbler in a clothes dryer. To do this we must first find the transfer of the open loop system. A permanent magnet DC motor (armature controlled) is used to drive the tumbler. A power amplifier is used to drive the motor. A voltage proportional to the desired speed of the tumbler is applied at the amplifier input. a. Identify the inputs and outputs of this system. b. Identify the components. c....
Automotive cruise control systems are used to hold the vehicle speed steady at a set value...
Automotive cruise control systems are used to hold the vehicle speed steady at a set value especially in long runs to prevent driver fatigue. After switched “ON” by the driver, this system takes the control of the gas throttle using an electronically controlled stepper motor, and keeps the vehicle speed constant. This system requires speed sensors to measure the controlled vehicle speed. a) Identify basic elements of the cruise control system. (Reference input, output, actuator, controller, sensor, plant) b) List...
Problem 1: Consider the control systems below and answer the questions listed: I. Manually Controlled Tank Level S...
Problem 1: Consider the control systems below and answer the questions listed: I. Manually Controlled Tank Level System A. Identify the following parameters: 1. Setpoint or reference point: 2. Controlled variable, c Manipulated variable, u Measured representation of the controlled variable, b 3. 4. 5. Error, e 6. Input signal to the control element, p Identify the following elements in the control B. system 1. Error detector 2. Controller 3. Control element 4. Process S. Measurement Element C. Draw a...
I need 5 real world examples, explaining what parts of the system are the process being...
I need 5 real world examples, explaining what parts of the
system are the process being controlled, sensors, actuators and the
controller. Then following with a block diagram
1.1 For at least 5 feedback control systems with which you are familiar: -Identify the process to be controlled, the sensor(s), the actuator(s), and the controller -Draw the block diagram showing these components.
57. A common application of control systems is in regulating the temperature of a chemical process...
57. A common application of control systems is in regulating the temperature of a chemical process (Figure P6.13). The flow of a chemical reactant to a process is controlled by an actuator and valve. The reactant causes the temperature in the vat to change. This temperature is sensed and com- pared to a desired set-point temperature in a closed loop, where the flow of reactant is adjusted to yield the desired temperature. In Chapter 9, we will learn how a...
MECH641- Process Instrumentation and Control (Assignment 3) Answer the following: (Each Question carries 5 marks) 1....
MECH641- Process Instrumentation and Control (Assignment 3) Answer the following: (Each Question carries 5 marks) 1. List the difference between open loop and closed loop control system with suitable example. 2. Draw the block diagram representation of a heating system. 3. Explain in detail the ratio control with suitable example. Rubrics Rubrics for descriptive questions: 5 marks: complete correct answer. 4 marks: correct answer with minor mistakes. 1-3 marks: partially correct answer (Deduction Method applies) 0 marks: incorrect answer.
Question 1 - Analogue Closed Loop Control Systems Many control systems involve processing analogue signals such...
Question 1 - Analogue Closed Loop Control Systems Many control systems involve processing analogue signals such as heat, light and movement Therefore analogue closed loop control system require walogue processing devices such as the operational amplifier (op-amp). One of the most common control applications involves using the op-amp as a comparator. In it's simplest form a comparator just compares two voltage signals, VI and V2. Ir VI is higher than V2 the output, Ve, is 'low', VI is lower than...
a) Draw the block diagram of a generic closed-loop digital control system. Show clearly all blocks...
a) Draw the block diagram of a generic closed-loop digital control system. Show clearly all blocks and all signals (continuous and discrete, including disturbances added to the forward path). b) Explain the advantages of digital control over analogue control. c) Explain why the Zero-Order-Hold (ZOH) operation may destabilize the system. (4) 14) Table of Laplace and z-transform Time function Laplace transform E() 2-Transform E(z) er) TED 20- lime-of-16- ri(n) 410) p=!11) ( 101) 10-10) re-10) त 21-26
Q3. Consider a single loop unity feedback control system of the open loop transfer function (a) Find the range of values of the gain K and the parameter p so that: (i) The overshoot is less than 10%....
Q3. Consider a single loop unity feedback control system of the open loop transfer function (a) Find the range of values of the gain K and the parameter p so that: (i) The overshoot is less than 10%. (ii)The settling time is less than 4 seconds Note: , 4.6 M. = exp CO 40% (b)What are the three elements in a PID controller? Considering each in turn, explain the main ways in which varying the parameters affects the closed-loop system...
1.(a)Explain an application of closed loop temperature control and pressure controls system in an oil refinery (b)Describe the two processes with block diagrams. (c). Select the industrial standard components used to develop the above systems and specification of each components
2. We wish to control the speed of the tumbler in a clothes dryer. To do this we must first find the transfer of the open loop system. A permanent magnet DC motor (armature controlled) is used to drive the tumbler. A power amplifier is used to drive the motor. A voltage proportional to the desired speed of the tumbler is applied at the amplifier input. a. Identify the inputs and outputs of this system. b. Identify the components. c....
Problem 1: Consider the control systems below and answer the questions listed: I. Manually Controlled Tank Level System A. Identify the following parameters: 1. Setpoint or reference point: 2. Controlled variable, c Manipulated variable, u Measured representation of the controlled variable, b 3. 4. 5. Error, e 6. Input signal to the control element, p Identify the following elements in the control B. system 1. Error detector 2. Controller 3. Control element 4. Process S. Measurement Element C. Draw a...
I need 5 real world examples, explaining what parts of the
system are the process being controlled, sensors, actuators and the
controller. Then following with a block diagram
1.1 For at least 5 feedback control systems with which you are familiar: -Identify the process to be controlled, the sensor(s), the actuator(s), and the controller -Draw the block diagram showing these components.
57. A common application of control systems is in regulating the temperature of a chemical process (Figure P6.13). The flow of a chemical reactant to a process is controlled by an actuator and valve. The reactant causes the temperature in the vat to change. This temperature is sensed and com- pared to a desired set-point temperature in a closed loop, where the flow of reactant is adjusted to yield the desired temperature. In Chapter 9, we will learn how a...
MECH641- Process Instrumentation and Control (Assignment 3) Answer the following: (Each Question carries 5 marks) 1. List the difference between open loop and closed loop control system with suitable example. 2. Draw the block diagram representation of a heating system. 3. Explain in detail the ratio control with suitable example. Rubrics Rubrics for descriptive questions: 5 marks: complete correct answer. 4 marks: correct answer with minor mistakes. 1-3 marks: partially correct answer (Deduction Method applies) 0 marks: incorrect answer.
Question 1 - Analogue Closed Loop Control Systems Many control systems involve processing analogue signals such as heat, light and movement Therefore analogue closed loop control system require walogue processing devices such as the operational amplifier (op-amp). One of the most common control applications involves using the op-amp as a comparator. In it's simplest form a comparator just compares two voltage signals, VI and V2. Ir VI is higher than V2 the output, Ve, is 'low', VI is lower than...
a) Draw the block diagram of a generic closed-loop digital control system. Show clearly all blocks and all signals (continuous and discrete, including disturbances added to the forward path). b) Explain the advantages of digital control over analogue control. c) Explain why the Zero-Order-Hold (ZOH) operation may destabilize the system. (4) 14) Table of Laplace and z-transform Time function Laplace transform E() 2-Transform E(z) er) TED 20- lime-of-16- ri(n) 410) p=!11) ( 101) 10-10) re-10) त 21-26
Q3. Consider a single loop unity feedback control system of the open loop transfer function (a) Find the range of values of the gain K and the parameter p so that: (i) The overshoot is less than 10%. (ii)The settling time is less than 4 seconds Note: , 4.6 M. = exp CO 40% (b)What are the three elements in a PID controller? Considering each in turn, explain the main ways in which varying the parameters affects the closed-loop system...
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