TABLE OF CONTENTSCONTENTS Page No.

CHAPTER 1 INTRODUCTION 1-31.1 Background 21.2 Motivation 21.3 Objective 21.4 Organization of dissertation 3

CHAPTER 2 LITERATURE REVIEW 4-9CHAPTER 3 ANATOMY OF BRAIN 10-13

3.1 Basis for Cognitive Science 103.2 Brain Type 10 3.2.1 The cerebellum 10 3.2.2 The brain stem 10 3.2.3 The cerebrum 10 3.2.3.1 Frontal Lobes 113.3 Executive Function 11 3.3.1 Executive Function: Main Steps 13

CHAPTER 4 VIRTUAL REALITY 14-194.1 Introduction 144.2 VR History 154.3 Importance of Virtual Reality 154.4 Types of VR System 16

4.4.1 Desktop Virtual Reality 16 4.4.2 Semi-Immersive Projection System 16 4.4.3 Fully Immersive HMD Systems 174.5 Application of VR 17 4.5.1 In the military 17 4.5.2 In medicine 18 4.5.3 Psychological therapy 18 4.5.4 In car companies 19 4.5.5 Gaming 19

CHAPTER 5 REQUIREMENTS AND PROJECT PROTOCOL 20-285.1 Hardware Requirements 205.2 Software Requirements 20

LIST OF FIGURES

Figure No. Figure Name Page No.

Figure 1.1 Workflow of dissertation 2

Figure 2.1 Rectification circuit 3

Figure 2.2 Classifications of rectifiers 3

Figure 2.3 Single phase half-wave rectifier 6

Figure 2.4 Input and resulting output voltage waveforms of single phase half-wave rectifier

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Figure 2.5 The full wave bridge rectifier 7

Figure 2.6 Center-tapped transformer rectifier 8

Figure 2.7 A basic half-wave controlled rectifier 9

Figure 2.8 Output voltage waveforms of single phase half-wave rectifier with gate pulse

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Figure 2.9 Control curve of single phase half-wave controlled rectifier 9

Figure 2.10 A basic full-wave controlled bridge rectifier 10

Figure 2.11 Three phase full-bridge uncontrolled rectifier 11

Figure 2.12 Source and output voltage 11

Figure 2.13 Three phase full-bridge controlled rectifier 12

Figure 2.14 Power factor triangle (lagging) 14

Figure 2.15 SMPS input without PFC 15

Figure 2.16 Voltage and current waveform of full wave rectifier 16

Figure 2.17 Schematic diagram of a single phase diode rectifier with capacitor filter circuit

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Figure 2.18 Typical line current and voltage waveforms 17

LIST OF TABLES

Table No. Table Name Page No.

Table 2.1 Specification of Components 22

Table 2.2 Values of parameters for conventional single phase diode rectifier

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Table 2.3 Values of parameters for conventional single phase diode rectifier with filter capacitor

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Table 2.4 Values of parameters for conventional single phase diode rectifier with LC filter

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Table 2.5 Values of parameters for single phase diode rectifier with parallel input resonant filter

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Table 2.6 Values of parameters for single phase diode rectifier with series input resonant filter

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Table 2.7 Values of parameters for Single phase diode rectifier with improved parallel input resonant filter

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Table 3.1 Comparison between DC and AC drives 43

Table 5.1 Effects of independent P, I and D tuning 79

Table 5.2 Different closed loop oscillation based tuning methods 80

Table 5.3 Linguistic variables in fuzzy inference system 85

Table 5.4 IF-THEN rules for fuzzy inference system 86

Table 5.5 Parameters values of controller without PFC 87

Table 5.6 Parameters values of controller with PFC 88

Table 6.1 Values of compared parameters with their respective topologies 91

Table 6.2 Comparison of PF and %THD for different drives 91

Table 6.3 Linear operating range of Load torque for different converter drives and firing angles

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