Details

Vehicle Dynamics


Vehicle Dynamics


Automotive Series 1. Aufl.

von: Martin Meywerk

79,99 €

Verlag: Wiley
Format: EPUB
Veröffentl.: 27.04.2015
ISBN/EAN: 9781118971369
Sprache: englisch
Anzahl Seiten: 368

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Beschreibungen

<ul> <li>Comprehensively covers the fundamentals of vehicle dynamics with application to automotive mechatronics</li> <li>Presents a number of different design, analysis and implementation considerations related to automobiles, including power requirements, converters, performance, fuel consumption and vehicle dynamic models</li> <li>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</li> <li>Includes exercise problems and MATLAB® codes</li> <li>Accompanied by a website hosting animations</li> </ul>
<p>Foreword xi</p> <p>Series Preface xiii</p> <p>Preface xv</p> <p>List of Abbreviations and Symbols xvii</p> <p><b>1 Introduction 1</b></p> <p>1.1 Introductory Remarks 3</p> <p>1.2 Motion of the Vehicle 4</p> <p>1.3 Questions and Exercises 8</p> <p><b>2 The Wheel 11</b></p> <p>2.1 Equations of Motion of the Wheel 11</p> <p>2.2 Wheel Resistances 14<br /><br /> 2.2.1 Rolling Resistance 14<br /><br /> 2.2.2 Aquaplaning 18<br /><br /> 2.2.3 Bearing Resistance 19<br /><br /> 2.2.4 Toe-In/Toe-Out Resistance 19</p> <p>2.3 Tyre Longitudinal Force Coefficient, Slip 20</p> <p>2.4 Questions and Exercises 24</p> <p><b>3 Driving Resistances, Power Requirement 27</b></p> <p>3.1 Aerodynamic Drag 27</p> <p>3.2 Gradient Resistance 29</p> <p>3.3 Acceleration Resistance 29</p> <p>3.4 Equation of Motion for the Entire Vehicle 32</p> <p>3.5 Performance 34</p> <p>3.6 Questions and Exercises 39</p> <p><b>4 Converters 43</b></p> <p>4.1 Clutch, Rotational Speed Converter 45</p> <p>4.2 Transmission, Torque Converter 48</p> <p>4.3 Questions and Exercises 54</p> <p><b>5 Driving Performance Diagrams, Fuel Consumption 57</b></p> <p>5.1 Maximum Speed without Gradient 60</p> <p>5.2 Gradeability 61</p> <p>5.3 Acceleration Capability 61</p> <p>5.4 Fuel Consumption 63</p> <p>5.5 Fuel Consumption Test Procedures 68</p> <p>5.6 Questions and Exercises 70</p> <p><b>6 Driving Limits 73</b></p> <p>6.1 Equations of Motion 74</p> <p>6.2 Braking Process 79</p> <p>6.3 Braking Rate 84</p> <p>6.4 Questions and Exercises 91</p> <p><b>7 Hybrid Powertrains 93</b></p> <p>7.1 Principal Functionalities 93</p> <p>7.2 Topologies of Hybrid Powertrains 99</p> <p>7.3 Regenerative Braking and Charging 101</p> <p>7.4 Questions and Exercises 106</p> <p><b>8 Adaptive Cruise Control 107</b></p> <p>8.1 Components and Control Algorithm 107</p> <p>8.2 Measurement of Distances and Relative Velocities 112</p> <p>8.3 Approach Ability 117</p> <p>8.4 Questions and Exercises 118</p> <p><b>9 Ride Dynamics 121</b></p> <p>9.1 Vibration Caused by Uneven Roads 124<br /><br /> 9.1.1 Damped Harmonic Oscillator 124<br /><br /> 9.1.2 Assessment Criteria 128<br /><br /> 9.1.3 Stochastic Irregularities 130<br /><br /> 9.1.4 Conflict between Safety and Comfort 132</p> <p>9.2 Oscillations of Powertrains 144<br /><br /> 9.2.1 Torsional Oscillators 144<br /><br /> 9.2.2 Centrifugal Pendulum Vibration Absorbers 147</p> <p>9.3 Examples 151</p> <p>9.4 Questions and Exercises 152</p> <p><b>10 Vehicle Substitute Models 155</b></p> <p>10.1 Two-mass Substitute System 155</p> <p>10.2 Two-axle Vehicle, Single-track Excitation 158</p> <p>10.3 Non-linear Characteristic Curves 165</p> <p>10.4 Questions and Exercises 167</p> <p><b>11 Single-track Model, Tyre Slip Angle, Steering 169</b></p> <p>11.1 Equations of Motion of the Single-track Model 169</p> <p>11.2 Slip Angle 177</p> <p>11.3 Steering 181</p> <p>11.4 Linearized Equations of Motion of the Single-track Model 185</p> <p>11.5 Relationship between Longitudinal Forces and Lateral Forces in the Contact Patch 188</p> <p>11.6 Effect of Differentials when Cornering 189</p> <p>11.7 Questions and Exercises 191</p> <p><b>12 Circular Driving at a Constant Speed 193</b></p> <p>12.1 Equations 193</p> <p>12.2 Solution of the Equations 195</p> <p>12.3 Geometric Aspects 197</p> <p>12.4 Oversteering and Understeering 201</p> <p>12.5 Questions and Exercises 205</p> <p><b>13 Dynamic Behaviour 207</b></p> <p>13.1 Stability of Steady-state Driving Conditions 207</p> <p>13.2 Steering Behaviour 210</p> <p>13.3 Crosswind Behaviour 213</p> <p>13.4 Questions and Exercises 216</p> <p><b>14 Influence of Wheel Load Transfer 217</b></p> <p>14.1 Wheel Load Transfer without Considering Vehicle Roll 217</p> <p>14.2 Wheel Load Transfer Considering Vehicle Roll 221</p> <p>14.3 Questions and Exercises 228</p> <p><b>15 Toe-in/Toe-out, Camber and Self-steering Coefficient 229</b></p> <p>15.1 Toe-in/Toe-out, Camber 229</p> <p>15.2 Questions and Exercises 233</p> <p><b>16 Suspension Systems 235</b></p> <p>16.1 Questions and Exercises 245</p> <p><b>17 Torque and Speed Converters 247</b></p> <p>17.1 Speed Converters, Clutches 247</p> <p>17.2 Transmission 252</p> <p>17.3 Questions and Exercises 258</p> <p><b>18 Shock Absorbers, Springs and Brakes 259</b></p> <p>18.1 Shock Absorbers 259</p> <p>18.2 Ideal Active Suspension and Skyhook Damping 264<br /><br /> 18.2.1 Ideal Active Suspension 264<br /><br /> 18.2.2 Skyhook Dampers 267</p> <p>18.3 Suspension Springs 269</p> <p>18.4 Brake Systems 277</p> <p>18.5 Questions and Exercises 281</p> <p><b>19 Active Longitudinal and Lateral Systems 283</b></p> <p>19.1 Main Components of ABS 283</p> <p>19.2 ABS Operations 287</p> <p>19.3 Build-up Delay of Yaw Moment 290</p> <p>19.4 Traction Control System 293</p> <p>19.5 Lateral Stability Systems 294</p> <p>19.6 Hydraulic Units for ABS and ESP 296</p> <p>19.7 Active Steering System 297</p> <p>19.8 Questions and Exercises 298</p> <p><b>20 Multi-body Systems 301</b></p> <p>20.1 Kinematics of Rigid Bodies 302</p> <p>20.2 Kinetic Energy of a Rigid Body 305</p> <p>20.3 Components of Multi-body Systems 309</p> <p>20.4 Orientation of Rigid Bodies 312</p> <p>20.5 Derivation and Solution of the Equations 315<br /><br /> 20.5.1 Derivation of the Equations 315<br /><br /> 20.5.2 Solution of Equations 316</p> <p>20.6 Applications of MBS 317</p> <p>20.7 Questions and Exercises 322</p> <p>Glossary 323</p> <p>References 329</p> <p>Index 331</p>
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.<br /><br />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.
<p><b>Vehicle Dynamics<br /> </b><b>Martin Meywerk, Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg) Germany<br /> <br /> </b><i>Vehicle Dynamics</i> 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.<br /> <br /> 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.<br /> <br /> Key features:<br /> <br /> </p> <ul> <li>Presents a number of different design, analysis and implementation considerations related to automobiles, including power requirements, converters, performance, fuel consumption and vehicle dynamic models</li> <li>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</li> <li>Includes exercise problems and MATLAB® codes</li> <li>Accompanied by a website hosting animations</li> </ul> <br /> <i>Vehicle Dynamics</i> is an ideal textbook for graduate and senior undergraduate students in automotive engineering, and is also a useful reference for practitioners in the automotive industry (designers, engineers and analysts, etc).

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