Technology of Semiactive Devices and Applications in Vibration Mitigation

List of Tables.

List of Algorithms.

List of Symbols.

Introduction.

Objectives.

Organization of the Book.

1 Reliability, Robustness and Structural Control.

1.1 Preliminary Concepts.

1.2 Definitions.

1.3 System Representation.

1.4 A Comparison of Passive, Active and Semiactive Control Strategies.

2 Collocated and Non-collocated Systems.

2.1 Introduction.

2.2 Definition of Collocated System.

2.3 Centralized and Non-centralized Systems.

2.4 Linear and Non-linear Systems.

2.5 The Problem of Spillover.

2.6 Advantages and Disadvantages of Collocated and Non-collocated Systems.

2.7 A Numerical Comparison.

3 Semiactive Devices.

3.1 The Basic Idea and a Brief History.

3.2 Variable Viscous Devices.

3.3 Variable Stiffness Devices.

3.4 Magnetorheological Devices.

3.5 Friction Devices.

3.6 Tuned Liquid Dampers.

3.7 Electro-inductive Device.

3.8 Air-jet Actuators.

3.9 SMA Actuators.

4 Semiactive Control Laws.

4.1 Control Strategies and Algorithms for Semiactive Damping.

4.2 Implementation Schemes.

5 Implementation of Semiactive Control Strategies.

5.1 Introduction.

5.2 Hardware Control Implementation.

5.3 Real-time Software.

5.4 Non-centralized Control Versus Collocated Systems.

6 Experimental Verification.

6.1 Introduction.

6.2 The Challenges of Performance-based Design in Structural Testing.

6.3 Base-isolated Buildings and Bridges.

6.4 Supplemental Damping Devices.

6.5 Experimental Methods in Structural Dynamics.

6.6 Assessment of Structural Control Devices.

7 Stability and Foreseen Developments.

7.1 Preliminary Concepts.

7.2 Semiactive Features.

7.3 Conclusions.

Appendix A: Damping.

A.1 Types of Damping.

A.2 Why Have a Damping Matrix?

A.3 Rayleigh Damping.

Bibliography.

Index.