what is control engineering

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What is Control Engineering?

Control engineering involves the design of an engineering product or system where a requirement is to accurately control some quantity,

say the temperature in a room or the position or speed of a car.

To do this one needs to know the value of the quantity being controlled, so that being able to measure is fundamental to control.

many early textbooks in the control engineering field used the word servomechanism in their title rather than control.

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model : a miniature representation of something; a pattern of something to be made; an example for imitation or emulation; a description or analogy used to help visualize something (e.g., an atom) that cannot be directly observed; a system of postulates, data and inferences presented as a mathematical description of an entity or state of affairs.

mathematical model (n): a representation in mathematical terms of the behavior of real devices and objects.

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MET56 CONTROL SYSTEM ENGINEERING (3 1 0 3) Unit – I Basic Components of Control System – Open loop and Closed loop system – Automatic Control System.Mathematical Modeling, Analogous Models – Mathematical modeling of fluid system and thermal systems – Transfer Function – Block diagram reduction Techniques. (12 hours) Unit – II Representation of Physical System – Linear approximation of non linear System – position Control system – Stepper motor – Hydraulic systems – pneumatic systems – Inertial navigation system – Applications.Modes of Controls: Proportional, Integral, Derivative – proportional plus integral – proportional plus Derivative– proportional Plus integral plus derivative controls – examples from Mechanical system. (12 hours) Unit – III Standard test signals and transient response of first and second order systems. Sources of errors, static and dynamic error constants. (12 hours)

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Unit – IV

Frequency Response – Bode Plot – Polar Plot.Stability Analysis – Relative stability – Routh Hurwitz Stability Criteria. (12 hours) Unit – V

Design Principles – an outline of Control System Design - Control of the A/F ratio in an Automotive Engine – Control of Read/Write Head Assembly of a Hard Disk.

Introduction to Fuzzy logic – Fuzzy set – Fuzzy Control – PLC – micro controller (12 hours)

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Text Books :1. F.H.Raven - Automatic Control Engineering, III Edition, McGraw HillStudents Edition.2. Gene F.Franklin et al - Feedback control of Dynamic Systems, IV Edition, PearsonEducation Asia, 2002.3. Katsushiks Oguta - Modern Control Engineering, IV Edition, Prentice Hall of India, 2002. Reference Books :B.C.Kuo - Automatic Control System, VII edition, Prentice Hall of India, 2002.I.J.Nagrath and M.Gopal - Control System Engineering, II edition, Wiley Eastern Ltd., 1992.Timothy J.Ross - Fuzzy logic with Engineering Applications, McGraw Hill Inc., 1995.

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CONTROL SYSTEM ENGINEERING control - producing desired results

system - is a set of self-contained processes under study

control system – by definition consists of the system to be controlled - called the plant

system which exercises control over the plant, calledcontroller

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car - plant

driver - controller

input - pressing the gas pedal

output - could be anything that can be directly measured

- speed, position, near by cars

Since the plant output is the same as the output of the control system, it is simply called the output of the system.

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control engineering is genuinely applied in many different fields and at many different levels

INTERDISCIPLINARY IN NATURE, AMALGAMATION OF ENGINEERING

control engineer who will integrate the various aspects to produce a working system

Control engineering uses the measurements of process variables and the power of actuators to provide better control of a system's outputs

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transfer function, noise/ disturbance, feed back

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controller – regulator - if constant speed

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Many engineers from different disciplines need to design and implement control systems:

the chemical engineer may need to provide level control for a tank of liquid;

the manufacturing engineer may need to control the speed of a conveyor belt regardless of the load put upon it,

the mechanical engineer may need to control the position of a machine's cutting tool; and

the electrical engineer may need to maintain a constant electrical power output regardless of the number of electrical machines being used in the factory.

To design these systems, we need to combine process and control engineering knowledge with design procedures, mathematical skills and analysis tools.

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Control engineering is a part of our life

Improvement in quality of life

Improvements in production processes

Improvements in natural resource usage

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Example of a control problem: Wind turbine systems

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Example of a control problem: Wind turbine systems

Control objective: To regulate the power output and to minimize the stresses and torque disturbances, also called the load disturbances by control engineers, on the rotor, the drive train and the tower installation.

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Example of a control problem: Wind turbine systems

Control objective: To regulate the power output and to minimize the stresses and torque disturbances, also called the load disturbances by control engineers, on the rotor, the drive train and the tower installation.

Manipulated variable: Altering the angles of the blades – or the blade tips – to the incoming wind controls the rotational speed of the wind turbine.

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Example of a control problem: Wind turbine systems

Control objective: To regulate the power output and to minimize the stresses and torque disturbances, also called the load disturbances by control engineers, on the rotor, the drive train and the tower installation.

Manipulated variable: Altering the angles of the blades – or the blade tips – to the incoming wind controls the rotational speed of the wind turbine.

Enabling technologies: System modelling, control design, mechanical system design, power electronics and electrical power systems knowledge

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Route to simple control design

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control engineering is genuinely applied in many different fields and at many different levels

control engineer who will integrate the various aspects to produce a working system

Control engineering uses the measurements of process variables andthe power of actuators to provide better control of a system's outputs

https://sites.google.com/site/smohamedali/

Prerequisites:

Differential equationsLaplace TransformsVector Matrix AnalysisCircuit AnalysisMechanicsThermodynamicsMATLAB

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Today’s engineer is a problem-solver, and the engineering method splits into problem analysis and design followed by solution implementation.

More and more the engineer must:

Decide upon the right questions to be asked.

Formulate a scientific and engineering description of the questions.

Use appropriate analysis and software tools to solve the problem.

Engineer and implement the solution.

What is important is the control problem to be formulated and

what the solution says about the control issues being studied.

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CHOICES…