System Dynamics

An expanded new edition of the bestselling system dynamics book using the bond graph approach

A major revision of the go-to resource for engineers facing the increasingly complex job of dynamic systems design, System Dynamics, Fifth Edition adds a completely new section on the control of mechatronic systems, while revising and clarifying material on modeling and computer simulation for a wide variety of physical systems.

This new edition continues to offer comprehensive, up-to-date coverage of bond graphs, using these important design tools to help readers better understand the various components of dynamic systems. Covering all topics from the ground up, the book provides step-by-step guidance on how to leverage the power of bond graphs to model the flow of information and energy in all types of engineering systems. It begins with simple bond graph models of mechanical, electrical, and hydraulic systems, then goes on to explain in detail how to model more complex systems using computer simulations. Readers will find:

• New material and practical advice on the design of control systems using mathematical models

• New chapters on methods that go beyond predicting system behavior, including automatic control, observers, parameter studies for system design, and concept testing

• Coverage of electromechanical transducers and mechanical systems in plane motion

• Formulas for computing hydraulic compliances and modeling acoustic systems

• A discussion of state-of-the-art simulation tools such as MATLAB and bond graph software

Complete with numerous figures and examples, System Dynamics, Fifth Edition is a must-have resource for anyone designing systems and components in the automotive, aerospace, and defense industries. It is also an excellent hands-on guide on the latest bond graph methods for readers unfamiliar with physical system modeling.

Auteur

DEAN C. KARNOPP and DONALD L. MARGOLIS are Professors of Mechanical Engineering at the University of California, Davis. RONALD C. ROSENBERG is Professor of Mechanical Engineering at Michigan State University. The authors have extensive experience in teaching system dynamics at the graduate and undergraduate levels and have published numerous papers on the industrial applications of the subject.

Contenu
Preface xi 1 Introduction 1

1.1 Models of Systems, 4

1.2 Systems, Subsystems, and Components, 7

1.3 State-Determined Systems, 9

1.4 Uses of Dynamic Models, 10

1.5 Linear and Nonlinear Systems, 11

1.6 Automated Simulation, 12

References, 13

Problems, 14

2 Multiport Systems and Bond Graphs 17

2.1 Engineering Multiports, 17

2.2 Ports, Bonds, and Power, 24

2.3 Bond Graphs, 27

2.4 Inputs, Outputs, and Signals, 30

Problems, 33

3 Basic Bond Graph Elements 37

3.1 Basic 1-Port Elements, 37

3.2 Basic 2-Port Elements, 50

3.3 The 3-Port Junction Elements, 57

3.4 Causality Considerations for the Basic Elements, 63

3.4.1 Causality for Basic 1-Ports, 64

3.4.2 Causality for Basic 2-Ports, 65

3.4.3 Causality for Basic 3-Ports, 66

3.5 Causality and Block Diagrams, 67

Reference, 71

Problems, 71

4 System Models 77

4.1 Electrical Systems, 78

4.1.1 Electrical Circuits, 78

4.1.2 Electrical Networks, 84

4.2 Mechanical Systems, 91

4.2.1 Mechanics of Translation, 91

4.2.2 Fixed-Axis Rotation, 100

4.2.3 Plane Motion, 106

4.3 Hydraulic and Acoustic Circuits, 121

4.3.1 Fluid Resistance, 122

4.3.2 Fluid Capacitance, 125

4.3.3 Fluid Inertia, 130

4.3.4 Fluid Circuit Construction, 132

4.3.5 An Acoustic Circuit Example, 135

4.4 Transducers and Multi-Energy-Domain Models, 136

4.4.1 Transformer Transducers, 137

4.4.2 Gyrator Transducers, 139

4.4.3 Multi-Energy-Domain Models, 142

References, 144

Problems, 144

5 State-Space Equations and Automated Simulation 162

5.1 Standard Form for System Equations, 165

5.2 Augmenting the Bond Graph, 168

5.3 Basic Formulation and Reduction, 175

5.4 Extended Formulation MethodsAlgebraic Loops, 183

5.4.1 Extended Formulation MethodsDerivative Causality, 188

5.5 Output Variable Formulation, 196

5.6 Nonlinear and Automated Simulation, 198

5.6.1 Nonlinear Simulation, 198

5.6.2 Automated Simulation, 202

Reference, 207

Problems, 207

6 Analysis and Control of Linear Systems 218

6.1 Introduction, 218

6.2 Solution Techniques for Ordinary Differential Equations, 219

6.3 Free Response and Eigenvalues, 222

6.3.1 A First-Order Example, 223

6.3.2 Second-Order Systems, 225

6.3.3 Example: The Undamped Oscillator, 230

6.3.4 Example: The Damped Oscillator, 232

6.3.5 The General Case, 236

6.4 Transfer Functions, 239

6.4.1 The General Case for Transfer Functions, 241

6.5 Frequency Response, 244

6.5.1 Example Transfer Functions and Frequency Responses, 249

6.5.2 Block Diagrams, 255

6.6 Introduction to Automatic Control, 258

6.6.1 Basic Control Actions, 259

6.6.2 Root Locus Concept, 273

6.6.3 General Control Considerations, 285

6.7 Summary, 310

References, 311

Problems, 311

7 Multiport Fields and Junction Structures 326

7.1 Energy-Storing Fields, 327

7.1.1 C-Fields, 327

7.1.2 Causal Considerations for C-Fields, 333

7.1.3 I -Fields, 340

7.1.4 Mixed Energy-Storing Fields, 348

7.2 Resistive Fields, 350

7.3 Modulated 2-Port Elements, 354

7.4 Junction Structures, 357

7.5 Multiport Transformers, 359

References, 364

Problems, 365

8 Transducers, Amplifiers, and Instruments 371 8.1 Power ...