| Adaptronics: A Concept for the Development of Adaptive and Multifunctional Structures | p. 1 |
| What is Adaptronics? | p. 1 |
| Examples of Adaptronic Systems | p. 1 |
| Multifunctional Elements | p. 4 |
| Fields of Technology and Application | p. 4 |
| Historical Review | p. 6 |
| References | p. 8 |
| Concepts of Adaptronic Structures | p. 9 |
| What are Adaptronic Structures? | p. 9 |
| Construction of Adaptronic Structures | p. 12 |
| Artificial Muscles: Actuators | p. 13 |
| Artificial Nerves: Sensors | p. 14 |
| Intelligence: Signal Processing, Communication, and Controls | p. 16 |
| Adaptive Algorithms for Smart Structures Control | p. 17 |
| Application Examples | p. 18 |
| Solid State Actuation and Morphing Structures | p. 18 |
| Structural Health Monitoring and Self-Repairing Structures | p. 22 |
| Future Adaptronic Structures | p. 26 |
| References | p. 27 |
| Multifunctional Materials: The Basis for Adaptronics | p. 29 |
| What are Functional Materials? | p. 29 |
| Basic Principles of Functional Materials | p. 30 |
| Phase Transitions and Anomalies | p. 31 |
| Microscopic, Mesoscopic, Macroscopic Phenomena and Symmetries | p. 33 |
| Energy Conversion | p. 37 |
| Examples of Functional Materials | p. 40 |
| Thermal Responsive Materials | p. 40 |
| Materials Responsive to Electric, Magnetic and Stress Fields | p. 42 |
| Increased Functionality Through Material Engineering | p. 45 |
| Morphotropic Phase Boundary | p. 46 |
| Domain Engineering | p. 48 |
| Functional Composites | p. 49 |
| Summary | p. 51 |
| References | p. 52 |
| Controllers in Adaptronics | p. 55 |
| Introduction | p. 55 |
| Description of the Test Articles | p. 57 |
| Conventional Model-Reference Adaptive Control Techniques | p. 58 |
| Experimental Results | p. 59 |
| Adaptive Control Using Neural Networks | p. 61 |
| Neural Network-Based Model Reference Adaptive Control | p. 61 |
| Neural Network-Based Optimizing Controller With On-Line Adaptation | p. 65 |
| Robust Controllers for Structural Systems | p. 69 |
| Uncertainty Modeling | p. 70 |
| Robust Control Design Methods | p. 71 |
| Summary | p. 72 |
| References | p. 73 |
| Simulation of Adaptronic Systems | p. 75 |
| Introduction | p. 75 |
| Related Elements of System Theory | p. 75 |
| Linear and Nonlinear Systems | p. 75 |
| State-Space Representation | p. 76 |
| Controllability and Observability | p. 77 |
| Stability | p. 78 |
| Alternative System Representations | p. 78 |
| Modelling of Adaptronic Structures | p. 79 |
| Basic Equations of Structural Mechanics | p. 79 |
| Constitutive Laws of Smart Materials | p. 80 |
| Finite Element Modelling | p. 81 |
| Equations of Motion | p. 82 |
| Sensor Equations | p. 83 |
| Model Reduction Techniques | p. 83 |
| Analysis of Adaptronic Systems and Structures | p. 84 |
| Stability Analysis | p. 84 |
| Spillover | p. 85 |
| Numerical Time Integration | p. 85 |
| Application Example | p. 86 |
| Optimization of Adaptronic Systems | p. 89 |
| Problem Statements | p. 89 |
| Solution Techniques | p. 90 |
| Software Tools for Adaptronic Structure Simulation | p. 91 |
| Solution Techniques | p. 91 |
| Control Design and Simulation Tools | p. 91 |
| System Identification Tools | p. 92 |
| References | p. 92 |
| Actuators in Adaptronics | |
| The Role of Actuators in Adaptronic Systems | p. 95 |
| What is an Actuator? | p. 95 |
| Actuator as a System Component | p. 97 |
| Power Electronics | p. 100 |
| 'Intelligent' and Self-Sensing Actuators | p. 101 |
| Actuator Design | p. 104 |
| Piezoelectric Actuators | p. 107 |
| Physical Effect | p. 107 |
| Materials | p. 108 |
| Design of Piezoelectric Transducers | p. 111 |
| Piezoelectric Transducer With Displacement Amplification | p. 114 |
| Piezoelectric Motors | p. 115 |
| Limitations of Piezoelectric Actuators | p. 118 |
| Example Applications of Piezoelectric Actuator Used in Adaptronics | p. 119 |
| Energy Harvesting Application Using Piezoelectric Actuators | p. 124 |
| Outlook | p. 124 |
| Magnetostrictive Actuators | p. 126 |
| Theory of Magnetostriction in Magnetostrictive Devices | p. 127 |
| Principles and Properties of Various Applications | p. 135 |
| Summary | p. 145 |
| Acknowledgement | p. 145 |
| Shape Memory Actuators | p. 145 |
| Properties of Shape Memory Alloys | p. 146 |
| Electrical Shape Memory Actuators | p. 152 |
| Perspectives for Shape Memory Actuators | p. 157 |
| Innovative Application Examples | p. 159 |
| Conclusion | p. 163 |
| Electrorheological Fluid Actuators | p. 163 |
| Particulate Fluids | p. 163 |
| Limitations to the Concept of Particulate Electrorheological Fluids | p. 174 |
| Future Aims and Present Problems | p. 180 |
| Summary of Advantages of Particulate ER Fluids | p. 182 |
| Homogenous ERF | p. 182 |
| Other ER Fluids | p. 183 |
| Magnetorheological Fluid Actuators | p. 184 |
| Description of MR Fluids | p. 185 |
| Advantages and Concerns | p. 186 |
| MR Fluid Devices | p. 189 |
| Basic MR Device Design Considerations | p. 192 |
| Examples of MR Devices and Systems | p. 196 |
| Conclusion | p. 204 |
| Electroactive Polymer Actuators | p. 204 |
| Introduction | p. 204 |
| Polyelectrolyte Gels (PG) | p. 205 |
| Ion-Polymer Metal Composites (IPMC) | p. 208 |
| Conducting Polymers (CP) | p. 210 |
| Carbon Nanotubes (CNT) | p. 216 |
| Dielectric Elastomers (DE) | p. 217 |
| Electroactive Polymers as Sensors | p. 220 |
| Final Remarks and Conclusions | p. 224 |
| Microactuators | p. 225 |
| Introduction | p. 225 |
| Driving Mechanisms, Scaling Laws, and Materials | p. 226 |
| Microfluidic Systems and Components | p. 232 |
| Actuators in Microoptical Systems | p. 239 |
| Microdrives | p. 241 |
| Conclusion and Outlook | p. 244 |
| Self-Sensing Solid-State Actuators | p. 245 |
| Introduction | p. 245 |
| Solid-State Actuators | p. 247 |
| Self-Sensing Model for Solid-State Actuators | p. 252 |
| Concept of Self-Sensing Solid-State Actuators | p. 254 |
| Modeling Hierarchy of Self-Sensing Actuators | p. 257 |
| Application Example: 1-DOF Piezoelectric Positioning System | p. 262 |
| Conclusion | p. 265 |
| Power Amplifiers for Unconventional Actuators | p. 265 |
| General Information About Power Electronics | p. 266 |
| Power Electronics for Piezo Actuators and Actuators with Electrorheological Fluids | p. 273 |
| Power Electronics for Magnetostrictive Actuators and Actuators with Magnetorheological Fluids | p. 279 |
| How to Proceed When Choosing an Amplifier Concept | p. 280 |
| References | p. 282 |
| Sensors in Adaptronics | |
| Advances in Intelligent Sensors | p. 301 |
| Introduction | p. 301 |
| Primary Sensor Defects | p. 302 |
| Hardware Structures | p. 304 |
| Software Processes | p. 307 |
| Case in Point: Load Cell | p. 311 |
| The Impact of ASICs | p. 312 |
| Reconfigurable Systems | p. 313 |
| Communications | p. 315 |
| Trends | p. 318 |
| Fiber Optic Sensors | p. 319 |
| Introduction | p. 319 |
| Basic Principle of Operation | p. 320 |
| Commonly Used Sensor Types for Deformation Measurement | p. 322 |
| Fiber Sensors for Physical and Chemical Parameters | p. 332 |
| Particular Aspects of Sensor Application | p. 333 |
| Application Examples | p. 335 |
| Research Tasks and Future Prospects | p. 341 |
| Piezoelectric Sensors | p. 342 |
| Introduction | p. 342 |
| Sensor Relevant Physical Quantities | p. 344 |
| Materials and Designs | p. 347 |
| Passive and Active Piezo Sensors | p. 354 |
| Piezo Sensors as Integral Components of Structures | p. 360 |
| Sensory Structures | p. 361 |
| Adaptive Structures | p. 362 |
| References | p. 364 |
| Adaptronic Systems in Engineering | |
| Adaptronic Systems in Aeronautics and Space Travel | p. 371 |
| Implications and Initiatives | p. 371 |
| Structural Health Monitoring | p. 374 |
| Shape Control and Active Flow | p. 377 |
| Damping of Vibration and Noise | p. 385 |
| Smart Skins | p. 391 |
| Control | p. 392 |
| Systems | p. 392 |
| Adaptronic Systems in Automobiles | p. 394 |
| Preamble | p. 394 |
| AVC/ASAC Project Examples | p. 396 |
| Current Research Topics for Automotive Smart Structures | p. 403 |
| Summary and Outlook | p. 408 |
| Adaptronic Systems in Machine and Plant Construction | p. 412 |
| Grinding Machines | p. 413 |
| Milling and Turning Machines | p. 417 |
| Deep Drilling Tools | p. 422 |
| Adaptronic Machine Components | p. 423 |
| Conclusion | p. 428 |
| Adaptronics in Civil Engineering Structures | p. 428 |
| State of the Art for Active Control of Civil Engineering Structures | p. 430 |
| The Second Generation of Active Control | p. 436 |
| Application of Active Control from Practical Engineering Aspects | p. 437 |
| Results of Experimental and Pull-Scale Tests (in Japan and the U.S.) | p. 438 |
| Conclusions | p. 442 |
| Adaptronic Vibration Absorbers for Ropeway Gondolas | p. 443 |
| Dynamic Vibration Absorbers | p. 444 |
| Dynamic Vibration Absorbers for Gondola | p. 446 |
| Gyroscopic Moment Absorber for Gondola | p. 452 |
| Conclusions and Outlook on Future Research | p. 456 |
| References | p. 456 |
| Adaptronic Systems in Biology and Medicine | |
| The Muscle as a Biological Universal Actuator in the Animal Kingdom | p. 469 |
| Principles of Construction and Function | p. 470 |
| Analogies to Muscle Function and Fine Structure | p. 472 |
| Muscle Contraction | p. 473 |
| Aspects of Muscle Mechanics | p. 476 |
| Principal Types of Motion Achievable by a Muscle and its Antagonists | p. 479 |
| Force and Position of Muscular Levers | p. 482 |
| Cooperation of Unequal Actuators | p. 484 |
| Muscles as Actuators in Controlled Systems | p. 486 |
| Control Loops in Biology: Similarities Within Biology and Engineering | p. 490 |
| Adaptronic Systems in Medicine and Medical Technology | p. 491 |
| Introduction | p. 491 |
| Adaptive Implants | p. 493 |
| Adaptive Diagnostic Systems | p. 500 |
| Conclusions and Outlook | p. 502 |
| References | p. 503 |
| Future Perspectives: Opportunities, Risks and Requirements in Adaptronics | p. 507 |
| What's in a Name? | p. 507 |
| Where Could Adaptronics Contribute: the Future? | p. 510 |
| But it is More Than Technology | p. 512 |
| Educating the Public | p. 514 |
| The International Dimension: And Musings on Technology Transfer | p. 515 |
| And What About Technology? | p. 516 |
| Some Concluding Thoughts | p. 517 |
| Index | p. 521 |
| About the Authors | p. 535 |
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