Chapter 1: Introduction 1 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Chapter 1 Introduction.

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Chapter 1: Introduction 1 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Chapter 1 Introduction

Chapter 1: Introduction 2 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.1 Simplified description of a control system

Chapter 1: Introduction 3 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e a. Early elevators were controlled by hand ropes or an elevator operator. Here, a rope is cut to demonstrate the safety brake, an innovation in early elevators; b. Modern Duo-lift elevators make their way up the Grande Arche in Paris, driven by one motor, with each car counterbalancing the other. Today, elevators are fully automatic, using control systems to regulate position and velocity. Figure 1.2 Elevators Photos courtesy of United Technologies Otis Elevator.

Chapter 1: Introduction 4 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.3 Rover was built to work in contaminated areas at Three Mile Island in Middleton, PA, where a nuclear accident occurred in The remote controlled robot’s long arm can be seen at the front of the vehicle. Photo © Hank Morgan/Rainbow/PNI.

Chapter 1: Introduction 5 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e (a) (b) (c) Figure 1.4 a. Video laser disc player; b. objective lens reading pits on a laser disc; c. optical path for playback showing tracking mirror rotated by a control system to keep the laser beam positioned on the pits. (c) Pioneer Electronics, Inc.

Chapter 1: Introduction 6 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure1.5 Elevator input and output

Chapter 1: Introduction 7 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.6 Block diagrams of control systems: a. open-loop system; b. closed-loop system

Chapter 1: Introduction 8 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.7 Computer hard disk drive, showing disks and read/write head Courtesy of Quantum Corp.

Chapter 1: Introduction 9 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.8 The search for extraterrestrial life is being carried out with radio antennas like the one pictured here. A radio antenna is an example of a system with position controls. © Peter Menzel.

Chapter 1: Introduction 10 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e a. system concept; b. detailed layout; c. schematic; d. functional block diagram Figure 1.9 Antenna azimuth position control system:

Chapter 1: Introduction 11 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.10 Response of a position control system showing effect of high and low controller gain on the output response

Chapter 1: Introduction 12 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.11 The control system design process

Chapter 1: Introduction 13 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure 1.12 Equivalent block diagram for the antenna azimuth position control system

Chapter 1: Introduction 14 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Table 1.1 Test waveforms used in control systems

Chapter 1: Introduction 15 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.1 Potentiometer

Chapter 1: Introduction 16 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.2 Aircraft attitude defined

Chapter 1: Introduction 17 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.3 Winder © J. Ayers, 1988.

Chapter 1: Introduction 18 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.4 Control of a nuclear reactor

Chapter 1: Introduction 19 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.5 Grinder system © 1997, ASME.

Chapter 1: Introduction 20 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.6 High-speed proportional solenoid valve © 1996, ASME.

Chapter 1: Introduction 21 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.7 RL network

Chapter 1: Introduction 22 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.8 RLC network

Chapter 1: Introduction 23 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Figure P1.9 High-speed rail system showing pantograph and catenary © 1997, ASME.

Chapter 1: Introduction 24 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Table 1.1 Test waveforms used in control systems