The document discusses different types of physical systems that can be modeled for control systems, including mechanical, thermal, hydraulic, and electrical systems. It provides details on determining the transfer function for mechanical translation systems. Thermal systems involve heat transfer through conduction, convection, or radiation. Hydraulic systems include liquid level systems and hydraulic devices that use incompressible oil. The document also covers mathematical modeling of electrical systems and using block diagram representations of control systems, including steps to solve block diagram reduction problems.

1. UNIT – II
CONTROL SYSTEM
ENGINEERING
Prepared by D.Balaji
AP/EEE/MVIT
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2. MATHEMATICAL MODEL OF PHYSICAL SYSTEM
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3. Symbols used for mechanical system
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7. GUIDELINES TO DETERMINE TRANSFER FUNCTION OF
MECHANICAL TRANSLATION SYSTEM
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10. THERMAL SYSTEM
Thermal systems are those that involve the
transfer of heat from one substance to another.
There are three different ways of heat flow from
one substance to another. They are conduction,
convection and radiation.
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15. HYDRAULIC SYSTEM
The Hydraulic system of interest to control engineers
may be classified into,
1. Liquid Level system and
2. Hydraulic devices
The liquid level system consists of storage tanks and
connecting pipes. The variables to be controlled are liquid
height in tanks and flow rate in pipes. The driving force is
the relative difference of the Iiquid heights in the tanks.
The Hydraulic devices are devices using incompressible
oil as their working medium. These devices are used for
controlling the forces and motions. The driving force is the
high pressure oil supplied by the Hydraulic pumps.
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20. MATHEMATICAL MODEL OF ELECTRICAL
SYSTEM
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27. BLOCK DIAGRAM REPRESENTATION OF
CONTROL SYSTEM
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33. STEPS TO SOLVE BLOCK DIAGRAM REDUCTION PROBLEMS:
Step 1: Reduce the blocks connected in series
Step 2: Reduce the blocks connected in parallel
Step 3: Reduce the minor feedback loops
Step 4: Try to shift take off points towards right and Summing point towards left
Step 5: Repeat steps 1 to 4 till simple form is obtained
Step 6: Obtain the Transfer Function of Overall System
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34. Advantages of Block Diagram Representation
Very simple to construct block diagram for a complicated system
Function of individual element can be visualized
Individual & Overall performance can be studied
Over all transfer function can be calculated easily
Disadvantages of Block Diagram Representation
No information about the physical construction
Source of energy is not shown
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35. INTRODUCTION TO TIME DOMAIN ANALYSIS
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36. STANDARD TEST SIGNALS
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