TAILIEUCHUNG - Mechanical Engineer´s Handbook P15

CHAPTER 13 COMPUTER-AIDED DESIGN Dr. Emory W. Zimmers, Jr., & Technical Staff Enterprise Systems Center Lehigh University Bethlehem, PA INTRODUCTION TO COMPUTER-AIDED DESIGN (CAD) A Historical Perspective of CAD The Design Process Applying Computers to Design HARDWARE Input/Output and Central Processing Unit (CPU) THE COMPUTER Computer Evolution Categories of Computers Central Processing Unit (CPU) RISC and CISC Computers Parallel Processing MEMORYSYSTEMS Organizational Methods Internal Memory and Related Techniques External Memory Magnetic Disks Magnetic Tape Optical Data Storage INPUTDEVICES Keyboard Touch Pad 275 276 276 . | CHAPTER 13 COMPUTER-AIDED DESIGN Dr. Emory W. Zimmers Jr. Technical Staff Enterprise Systems Center Lehigh University Bethlehem PA INTRODUCTION TO COMPUTER-AIDED DESIGN CAD 275 A Historical Perspective of CAD 276 The Design Process 276 Applying Computers to Design 278 HARDWARE 282 Input Output and Central Processing Unit CPU 282 THE COMPUTER 283 Computer Evolution 284 Categories of Computers 284 Central Processing Unit CPU 285 RISC and CISC Computers 285 Parallel Processing 287 MEMORY SYSTEMS 287 Organizational Methods 287 Internal Memory and Related Techniques 288 External Memory 289 Magnetic Disks 289 Magnetic Tape 290 Optical Data Storage 290 INPUT DEVICES 290 Keyboard 290 TouchPad 291 Mouse 291 Trackball 291 Light Pen 291 Digitizer 292 Scanner 293 OUTPUT DEVICES 293 Electronic Displays 293 Hard Copy Devices 294 SOFTWARE 296 Operating Systems 296 Graphical User Interface GUI and the X Window System 298 Computer Languages 299 CAD SOFTWARE 301 Graphics Software 301 Solid Modeling 302 CAD STANDARDS AND TRANSLATORS 309 Analysis Software 311 APPLICATIONS OF CAD 314 Optimization Applications Virtual Prototyping 314 315 Rapid Prototyping 316 Computer-Aided Manufacturing CAM 317 INTRODUCTION TO CAD Computer-aided design CAD uses the mathematical and graphic-processing power of the computer to assist the engineer in the creation modification analysis and display of designs. Many factors have contributed to CAD technology becoming a necessary tool in the engineering world such as the computer s speed at processing complex equations and managing technical databases. CAD combines the characteristics of designer and computer that are best applicable to the design process. The .

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