Advanced Seat suspension control system design for heavy duty vehicles Cover Title page Copyright Contents Chapter 1 Introduction 1 Background and motivation 2 Whole body vibration 3 Seat suspension for vertical vibration control 3.1 Passive seat suspension 3.2 Active seat suspension 3.3 Semi active seat suspension 4 Seat suspension for nonvertical or multiple DOF vibration control 5 Our contribution and future opportunities 6 Discussions References Chapter 2 Controllable electromagnetic damper based seat suspension 1 Introduction 2 Damping controllable EMD 2.1 Damping controllable EMD system 2.2 Rotation test with a constant rate 2.3 Sinusoidal rotation test 3 Variable damping seat suspension with EMD 3.1 Variable damping seat suspension 3.2 System analysis 4 H∞ Controller design 5 Evaluation 5.1 Vibration acceleration transmissibility 5.2 Random vibration tests 6 Conclusions References Chapter 3 Controllable magnetorheological fluid damper based seat suspension 1 Introduction 2 The structure of the innovative seat suspension with rotary MR damper 3 The property test of the seat suspension and results discussion 3.1 Testing method 3.2 Test results 3.3 The dynamic model of the seat suspension 3.4 Control algorithm 3.5 The numerical simulation results 3.5.1 The simulation results under harmonic excitation 3.5.2 The simulation results under random excitation 4 Experimental effectiveness evaluation of the rotary MR seat suspension 4.1 Test system 4.2 Test results 4.2.1 The test results under harmonic excitation 4.2.2 The test results under random excitation 5 Conclusion Acknowledgments References Chapter 4 Self powered MR seat suspension 1 Introduction 2 The structure and analysis of the self powered seat suspension 2.1 The structure and working mechanism of the self powered seat suspension 2.2 The design of the rotary MR damper 2.3 Analysis of the self powered generation system 3 The property test of the seat suspension 4 Testing result of the seat suspension under different constant currents 4.1 Testing result of the self powered generation system 4.2 Testing result of the self powered MR seat suspension 5 Controller design 6 Vibration reduction evaluation of the self powered MR seat suspension 6.1 Test system 6.2 Testing result 6.2.1 The test results under harmonic excitation 6.2.2 The test results under random excitation 7 Conclusion References Chapter 5 Variable equivalent stiffness seat suspension 1 Introduction 2 Variable stiffness seat suspension 3 A seat suspension with electrical variable stiffness device 3.1 EVSD based seat suspension 3.1.1 EVSD prototype 3.1.2 Model validation