Semi-Active Suspension Control Design for Vehicles

1st Edition

Authors: Sergio Savaresi Charles Poussot-Vassal Cristiano Spelta Olivier Sename Luc Dugard
Hardcover ISBN: 9780080966786
eBook ISBN: 9780080966793
Imprint: Butterworth-Heinemann
Published Date: 13th August 2010
Page Count: 240
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Semi-Active Suspension Control Design for Vehicles presents a comprehensive discussion of designing control algorithms for semi-active suspensions. It also covers performance analysis and control design. The book evaluates approaches to different control theories, and it includes methods needed for analyzing and evaluating suspension performances, while identifying optimal performance bounds.

The structure of the book follows a classical path of control-system design; it discusses the actuator or the variable-damping shock absorber, models and technologies. It also models and discusses the vehicle that is equipped with semi-active dampers, and the control algorithms. The text can be viewed at three different levels: tutorial for novices and students; application-oriented for engineers and practitioners; and methodology-oriented for researchers.

The book is divided into two parts. The first part includes chapters 2 to 6, in which fundamentals of modeling and semi-active control design are discussed. The second part includes chapters 6 to 8, which cover research-oriented solutions and case studies.

The text is a comprehensive reference book for research engineers working on ground vehicle systems; automotive and design engineers working on suspension systems; control engineers; and graduate students in control theory and ground vehicle systems.

Key Features

  • Appropriate as a tutorial for students in automotive systems, an application-oriented reference for engineers, and a control design-oriented text for researchers that introduces semi-active suspension theory and practice
  • Includes explanations of two innovative semi-active suspension strategies to enhance either comfort or road-holding performance, with complete analyses of both
  • Also features a case study showing complete implementation of all the presented strategies and summary descriptions of classical control algorithms for controlled dampers


Research engineers working on automotive and ground vehicle systems; Automotive design engineers working on suspension systems; Control engineers; Graduate / postgraduate students in ground vehicle systems or control theory.

Table of Contents

List of Figures List of Tables About the Authors Preface Acknowledgements Notations Chapter 1 Introduction and Motivations 1.1 Introduction and Historical Perspective 1.2 Semi-Active Suspensions 1.3 Applications and Technologies of Semi-Active Suspensions 1.4 Book Structure and Contributions 1.5 Model Parameter Sets Chapter 2 Semi-Active Suspension Technologies and Models 2.1 Introduction to Suspension Modeling 2.2 Passive Suspension Systems 2.2.1 Coil Spring 2.2.2 Gas Spring 2.2.3 Ideal Damping Element in a Passive Suspension System 2.3 Controllable Suspension Systems: a Classification 2.4 Semi-Active Suspension Technologies 2.4.1 Electrohydraulic Dampers (EH Dampers) 2.4.2 Magnetorheological Dampers (MR Dampers) 2.4.3 Electrorheological Dampers (ER Dampers) 2.4.4 On “linearization” of Damping Characteristics 2.5 Dynamical Models for Semi-Active Shock Absorber 2.5.1 Classical Model for Semi-Active Shock Absorber 2.5.2 Control Oriented Dynamical Model 2.5.3 Simplified First-Order Model for Semi-Active Shock Absorber 2.6 Conclusions Chapter 3 Suspension Oriented Vehicle Models 3.1 Passive Vertical Quarter-Car Model 3.1.1 Nonlinear Passive Model 3.1.2 Equilibrium Points 3.1.3 LTI Passive Models 3.1.4 Quarter-Car Model Invariance Properties 3.1.5 Numerical Discussion and Analysis 3.1.6 Remarks on the Simplified Quarter-Car Model 3.2 Passive Vertical Half-Vehicle Models 3.2.1 Pitch Oriented Model 3.2.2 Numerical Discussion and Analysis 3.3 Passive Vertical Full Vehicle Model 3.3.1 Assumptions and Kinematic Equations 3.3.2 Full Vertical Dynamic Equations 3.4 Passive Extended Half-Vehicle Model 3.4.1 Nonlinear Model 3.5 Semi-Active Vertical Quarter-Car Model 3.5.1 Nonl


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About the Author

Sergio Savaresi

Affiliations and Expertise

Politecnico di Milano, dipartimento di Elettronica e Informazione, Italy

Charles Poussot-Vassal

Affiliations and Expertise

Systems Control and Flight Dynamics Department (DCSD) of ONERA, France

Cristiano Spelta

Affiliations and Expertise

Universita degli Studi di Bergamo, Italy

Olivier Sename

Affiliations and Expertise

Control Systems department of GIPSA-lab, France

Luc Dugard

Affiliations and Expertise

Control Systems department of GIPSA-lab, France