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Presents a number of different design, analysis and
implementation considerations related to automobiles, including
power requirements, converters, performance, fuel consumption and
vehicle dynamic models
Covers the dynamics, modeling and control of not only the
entire vehicle system, but also of key elements of the vehicle such
as transmissions, and hybrid systems integration
Includes exercise problems and MATLAB® codes
Accompanied by a website hosting animations
Auteur
Martin Meywerk is a Professor and the Head of the Institute of Automotive and Powertrain Engineering at Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg) in Germany. He teaches courses in vehicle dynamics, automotive mechatronics, computer aided engineering and optimization. His research focuses on dynamic behaviour of vehicles and tyres, driving simulators and CAE-methods in automotive engineering.
Previously he has worked on research projects with Volkswagen, BMW, Daimler, Bast and other companies. He is the course instructor for a Massive Online Open Course (MOOC) in vehicle dynamics.
Texte du rabat
Vehicle Dynamics
**Martin Meywerk, Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg) Germany
Vehicle Dynamics comprehensively covers the fundamentals of vehicle dynamics with application to automotive mechatronics. It is divided into the three parts covering longitudinal, vertical and lateral dynamics, and considers the application of these to modern mechatronic systems including the anti-lock braking system and dynamic stability control.
The text provides a comprehensive overview of key classical elements of the vehicle, as well as modern twenty-first century concepts that have only recently been implemented on the most modern commercial vehicles. The topics covered range from basic vehicle rigid body kinematics and wheel dynamic analysis, to advanced concepts in cruise control, hybrid powertrain design and analysis, and multi-body systems. The conflict between safety and comfort is also discussed, and consideration is given to dynamic behaviour, the suspension system and oscillations of the powertrain.
Key features:
Résumé
Contenu
Foreword xi
Series Preface xiii
Preface xv
List of Abbreviations and Symbols xvii
1 Introduction 1
1.1 Introductory Remarks 3
1.2 Motion of the Vehicle 4
1.3 Questions and Exercises 8
2 The Wheel 11
2.1 Equations of Motion of the Wheel 11
2.2 Wheel Resistances 14
2.2.1 Rolling Resistance 14
2.2.2 Aquaplaning 18
2.2.3 Bearing Resistance 19
2.2.4 Toe-In/Toe-Out Resistance 19
2.3 Tyre Longitudinal Force Coefficient, Slip 20
2.4 Questions and Exercises 24
3 Driving Resistances, Power Requirement 27
3.1 Aerodynamic Drag 27
3.2 Gradient Resistance 29
3.3 Acceleration Resistance 29
3.4 Equation of Motion for the Entire Vehicle 32
3.5 Performance 34
3.6 Questions and Exercises 39
4 Converters 43
4.1 Clutch, Rotational Speed Converter 45
4.2 Transmission, Torque Converter 48
4.3 Questions and Exercises 54
5 Driving Performance Diagrams, Fuel Consumption 57
5.1 Maximum Speed without Gradient 60
5.2 Gradeability 61
5.3 Acceleration Capability 61
5.4 Fuel Consumption 63
5.5 Fuel Consumption Test Procedures 68
5.6 Questions and Exercises 70
6 Driving Limits 73
6.1 Equations of Motion 74
6.2 Braking Process 79
6.3 Braking Rate 84
6.4 Questions and Exercises 91
7 Hybrid Powertrains 93
7.1 Principal Functionalities 93
7.2 Topologies of Hybrid Powertrains 99
7.3 Regenerative Braking and Charging 101
7.4 Questions and Exercises 106
8 Adaptive Cruise Control 107
8.1 Components and Control Algorithm 107
8.2 Measurement of Distances and Relative Velocities 112
8.3 Approach Ability 117
8.4 Questions and Exercises 118
9 Ride Dynamics 121
9.1 Vibration Caused by Uneven Roads 124
9.1.1 Damped Harmonic Oscillator 124
9.1.2 Assessment Criteria 128
9.1.3 Stochastic Irregularities 130
9.1.4 Conflict between Safety and Comfort 132
9.2 Oscillations of Powertrains 144
9.2.1 Torsional Oscillators 144
9.2.2 Centrifugal Pendulum Vibration Absorbers 147
9.3 Examples 151
9.4 Questions and Exercises 152
10 Vehicle Substitute Models 155
10.1 Two-mass Substitute System 155
10.2 Two-axle Vehicle, Single-track Excitation 158
10.3 Non-linear Characteristic Curves 165
10.4 Questions and Exercises 167
11 Single-track Model, Tyre Slip Angle, Steering 169
11.1 Equations of Motion of the Single-track Model 169
11.2 Slip Angle 177
11.3 Steering 181
11.4 Linearized Equations of Motion of the Single-track Model 185
11.5 Relationship between Longitudinal Forces and Lateral Forces in the Contact Patch 188
11.6 Effect of Differentials when Cornering 189
11.7 Questions and Exercises 191
12 Circular Driving at a Constant Speed 193
12.1 Equations 193
12.2 Solution of the Equations 195
12.3 Geometric Aspects 197
12.4 Oversteering and Understeering 201
12.5 Questions and Exercises 205
13 Dynamic Behaviour 207
13.1 Stability of Steady-state Driving Conditions 207
13.2 Steering Behaviour 210
13.3 Crosswind Behaviour 213
13.4 Questions and Exercises 216
14 Influence of Wheel Load Transfer 217
14.1 Wheel Load Transfer without Considering Vehicle Roll 217
14.2 Wheel Load Transfer Considering Vehicle Roll 221 ...