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Active Control of Structures
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Description: |
The book begins with an introduction to active damping. It introduces active vibration control through the use of smart materials and structures (such as MR/ER fluids, shape memory alloys and piezoelectric materials), semi-active control devices, and a variety of feedback options. Examples employed include telescope vibration control and bridge cable damping. Vibration control methods and devices in civil structures are then discussed. An examination of active, passive and semi-active devices currently employed in vibration control and damping of civil structures is included. Modal analysis and the reduced-order physical modelling method for structural control are next presented. The authors then explore the spill over problem, a problem associated with reduced-order modelling of a structure in active control. The active control of buildings and bridge towers is examined, reporting on recent trends in active vibration control mainly as developed in Japan for civil structures. In the penultimate chapter, active tendon control of cable structures is addressed and the active damping of vibrations of the cable-stayed structures is investigated. The concluding chapter discusses the active and semi-active isolation in mechanical structures, including an exploration of active isolation and the increasing use of semi-active devices in responses to pressures to reduce weight and cost.
With Active Control of Structures, two global pioneers present the state-of-the-art in the theory, design and application of active vibration control. As the demand for high performance structural systems increases, so will the demand for information and innovation in structural vibration control; this book provides an effective treatise of the subject that will meet this requirement. The authors introduce active vibration control through the use of smart materials and structures, semi-active control devices and a variety of feedback options; they then discuss topics including methods and devices in civil structures, modal analysis, active control of high-rise buildings and bridge towers, active tendon control of cable structures, and active and semi-active isolation in mechanical structures.
Active Control of Structures: -Discusses new types of vibration control methods and devices, including the newly developed reduced-order physical modelling method for structural control -Introduces triple high-rise buildings connected by active control bridges as devised by Professor Seto -Offers a design strategy from modelling to controller design for flexible structures -Makes prolific use of practical examples and figures to describe the topics and technology in an intelligible manner |
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Contents: |
-About the Authors
-Preface
-Acknowledgements
-Active Damping -- Introduction -- Structural Control -- Plant Description -- Equations of Structural Dynamics -- Collocated Control System -- Active Damping with Collocated System -- Decentralized Control with Collocated Pairs
- Active Isolation -- Introduction -- Relaxation Isolator -- Sky-hook Damper -- Force Feedback -- Six-Axis Isolator -- Vehicle Active Suspension -- Semi-Active Suspension
-A Comparison of Passive, Active and Hybrid Control -- Introduction -- System Description -- The Dynamic Vibration Absorber -- Active Mass Damper -- Hybrid Control -- Shear Control -- Force Actuator, Displacement Sensor -- Displacement Actuator, Force Sensor
-Vibration Control Methods and Devices -- Introduction -- Classification of Vibration Control Methods -- Construction of Active Dynamic Absorber -- Control Devices forWind Excitation Control in Civil Structures -- Real Towers Using the Connected Control Method -- Application of Active Dynamic Absorber for Controlling Vibration of Singled of Systems -- Remarks
-Reduced-Order Model for Structural Control -- Introduction -- Modeling of Distributed Structures -- Spillover -- The Lumped Modeling Method -- Method of Equivalent Mass Estimation -- Modeling of Tower-like Structure -- Modeling of Plate Structures -- Modeling of a Bridge Tower -- Robust Vibration Control for Neglected Higher Modes -- Conclusions
-Active Control of Civil Structures - Introduction - Classification of Structural Control for Buildings - Modeling and Vibration Control for Tower Structures - Active Vibration Control of Multiple Buildings Connected with Active Control Bridges in Response to Large Earthquakes - Vibration Control for Real Triple Towers Using CCM - Vibration Control of Bridge Towers Using a Lumped Modeling Approach - Conclusion
References
Index |
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Author |
Professor Preumont is a Professor of Mechanical Engineering and Robotics at the Université Libre de Bruxelles, Brussels, Belgium. He is an expert in structural dynamics (nuclear and aerospace structures), random vibration (earthquake engineering, acoustic fatigue), SMART materials and structures, active vibration control and robotics, mobile robots and walking machines. He has been awarded several prestigious prizes during his career, including the Louis BAES prize from the Belgian Academy in 1987, for his work in random vibration. More recently he was presented with the Five-year FNRS Scientific Prize in Applied Exact Sciences (period 1996-2000) for his fundamental scientific contribution and numerous industrial applications in modelling and active control of complex mechanical structures.
Kazuto Seto is a Professor in the College of Science and Technology at Nihon University, Tokyo, Japan. Professor Setoss research interests are in the area of structural vibration control, system modelling and identification, and vibration control for multi-structural system with multi controlled modes. From 1971-1993 he worked as a lecturer and professor at the Department of Mechanical Engineering for the National Defence. Following this he became executive director of the Japanese Society of Mechanical Engineering (JSME). Professor Seto is currently an honorary member of JSME and a fellow member of IE Australia. He has been awarded several JSME awards, including the Dynamics, Measurement and Control Award in 1994, the Dynamics, Measurement and Control Award for International Activity in 1996, and a JSME Centennial Award for his contribution in 1997. |
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