Download or read book Advanced Design and Control Concepts for Actuators Based on Shape Memory Alloy Wires written by Paul Motzki and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of Shape Memory Alloy SMA Actuators written by Ashwin Rao and published by Springer. This book was released on 2015-05-08 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This short monograph presents an analysis and design methodology for shape memory alloy (SMA) components such as wires, beams, and springs for different applications. The solid-solid, diffusionless phase transformations in thermally responsive SMA allows them to demonstrate unique characteristics like superelasticity and shape memory effects. The combined sensing and actuating capabilities of such materials allows them to provide a system level response by combining multiple functions in a single material system. In SMA, the combined mechanical and thermal loading effects influence the functionality of such materials. The aim of this book is to make the analysis of these materials accessible to designers by developing a "strength of materials" approach to the analysis and design of such SMA components inspired from their various applications with a review of various factors influencing the design process for such materials.
Download or read book Shape Memory Alloy Actuators written by Mohammad H. Elahinia and published by John Wiley & Sons. This book was released on 2016-01-19 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a systematic approach to realizing NiTi shape memory alloy actuation, and is aimed at science and engineering students who would like to develop a better understanding of the behaviors of SMAs, and learn to design, simulate, control, and fabricate these actuators in a systematic approach. Several innovative biomedical applications of SMAs are discussed. These include orthopedic, rehabilitation, assistive, cardiovascular, and surgery devices and tools. To this end unique actuation mechanisms are discussed. These include antagonistic bi-stable shape memory-superelastic actuation, shape memory spring actuation, and multi axial tension-torsion actuation. These actuation mechanisms open new possibilities for creating adaptive structures and biomedical devices by using SMAs.
Download or read book Shape Memory Alloys New Advances written by Mohammad Asaduzzaman Chowdhury and published by BoD – Books on Demand. This book was released on 2024-03-27 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape Memory Alloys - New Advances is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of shape memory alloys. It provides a thorough overview of the latest research efforts by international authors on shape memory alloys and opens new possible research paths for further novel developments.
Download or read book Design Dynamics and Control of a Shape Memory Alloy Wire Bundle Actuator written by Michael John Mosley and published by . This book was released on 1999 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Segmented Binary Control of Shape Memory Actuator Systems written by Brian A. Selden and published by . This book was released on 2005 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach to the design and control of shape memory alloy (SMA) actuators is presented. SMA wires are divided into many segments and their thermal states are controlled individually as a group of finite state machines. Instead of driving a current to the entire SMA wire and controlling the wire length based on the analogue strain-temperature characteristics, the new method controls the binary state (hot or cold) of individual segments and thereby the total displacement is proportional to the length of the heated segments, i.e. austenite phase. Although the thermo-mechanical properties of SMA are highly nonlinear and uncertain with a prominent hysteresis, Segmented Binary Control is robust and stable, providing characteristics similar to a stepping motor. However, the heating and cooling of each segment to its bi-stable states entail longer time and larger energy for transition. An efficient method for improving speed of response and power consumption is developed by exploiting the inherent hysteresis of SMA. Instead of keeping the extreme temperatures continuously, the temperatures return to intermediate "hold" temperatures closer to room temperature but sufficient to keep constant phase. Coordination of the multitude of segments having independent thermal states allows for faster response with little latency time even for thick SMA wires. Based on stress dependent thermo-mechanical characteristics, the hold temperature satisfying a given Stress Margin is obtained. The new control method is implemented using the Peltier effect thermoelectric devices for selective segment-by-segment heating and cooling. Experiments demonstrate effectiveness of the proposed method.
Download or read book Shape Memory Microactuators written by Manfred Kohl and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overview of recent achievements, describing the microactuator development of microvalves and liner actuators comprehensively from concept through prototype. Further key aspects included are three-dimensional models for handling complex SMA actuator geometries and coupled simulation routines that take multifunctional properties into account. Mechanical and thermal optimization criteria are introduced for actuator design, allowing an optimum use of the shape memory effect. It is shown that some of the prototypes presented, e.g. SMA microgrippers, already outperform conventional components.
Download or read book Systems with Hysteresis written by Fayçal Ikhouane and published by John Wiley & Sons. This book was released on 2007-09-27 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hysterisis is a system property that is fundamental to a range of engineering applications as the components of systems with hysterisis are able to react differently to different forces applied to them. Control theory is used to model these complex systems and cause them to behave in the desired manner; the Bouc-Wen model is a well-known semi-physical model that is used extensively to describe the hysterisis of systems in the areas of smart structures and civil engineering. The Bouc-Wen model for system hysterisis has increased in popularity due to its capability of capturing in an analytical form a range of shapes of hysteretic cycles that match the behaviour of a wide class of hysteretic systems. “Systems with Hysterisis: Analysis, Identification and Control using the Bouc-Wen Model” deals with the analysis, identification and control of these systems, and offers a comprehensive and self-contained framework for the study of the Bouc-Wen model. Includes the latest techniques for modelling smart structures and materials Provides a rigorous mathematical treatment of the subject along with practical comments, numerical solutions and a case study of magentorheological (MR) dampers. Begins by analysing the compatibility of the Bouc-Wen model with the laws of physics, and continues to cover the relationship between the model parameters and hysterisis loop, identification of the model parameters and control of systems that include a hysteretic part described by the Bouc-Wen model. Includes case studies covering the identification and control of smart material transducers for use in automotive, aerospace and structural control Systems with Hysterisis: Analysis, Identification and Control using the Bouc-Wen Model offers an invaluable source of ideas, concepts and insights for engineers, researchers, lecturers and senior/ postgraduate students involved in the research, design and development of smart structures and related areas within civil and mechanical engineering. It will also be of interest to readers involved in the wider disciplines of electrical & control engineering, applied mathematics, applied physics and material science.
Download or read book Actuators written by Constantin Volosencu and published by BoD – Books on Demand. This book was released on 2018-07-11 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book promotes new research results in the field of modern actuators and their applications. New coverage of dielectric barrier discharge plasma actuators, polymeric microgripper based on the cascaded V-shaped electrothermal actuators, ionic polymer actuators, wideband actuators and energy harvesters, electromagnetic actuators and shape memory alloy actuators are comprehended. The book is structured in four sections: design, fabrication and simulation; control systems; medical applications and fault detection. Seven chapters are published following a rigorous selection process. In the first section, a study carried out to investigate experimentally and by numerical simulations a microscale plasma actuator; the design, fabrication, numerical simulations, and experimental investigations of a polymeric microgripper designed using the cascaded V-shaped electrothermal actuators; a review of the development of ionic polymer actuator with introduction of two kinds of typical polymer actuators - ionic polymer-metal composites and bucky gel actuator - with their basic principle and fabrication process and typical applications and a methodology of designing and testing wideband actuators and energy harvesters, treated as one mechanical resonator, with a discussion on shock harvester, resonant harvester and energy transmission system, are presented. The second section has a chapter dedicated to modeling, system identification and control of electromagnetic actuators with main focus on the actuators used in magnetic levitation, in fuel injection systems and in variable valve timing. The third section presents a study focused on quantifying the decline in tactile sensation associated with diabetic neuropathy and developed a measurement device that used a thin-shaped memory alloy wire as the actuator. The fourth section includes a chapter presenting a two-level fault diagnosis and root-cause analysis scheme for a class of interconnected invertible dynamic systems, which aims at detecting and identifying actuator fault and causes.
Download or read book The Design and Control of a Shape Memory Alloy Linear Actuator written by Patti Sue Brown and published by . This book was released on 1988 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors in the Design and Control of Shape Memory Alloy Actuators written by Hongyan Luo and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shape Memory Alloy Actuators written by Burcu Dönmez and published by . This book was released on 2011-11 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Modeling and Control System Design for Shape Memory Alloy Actuators written by In Seon Kim and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Shape Memory Alloy Wires as Actuators for Textile Robotics and Compression Garment Applications written by Jamie L. Kennedy and published by . This book was released on 2016 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2008, a Surgeon General's Call to Action was published on how to prevent Deep Vein Thrombosis, DVT, and Pulmonary Embolism, PE. These two diseases are the main cause blood clots and hold high death counts. With the only prevention devices being two extremes, a static compression garment and a pneumatic compression boot with a non-movable air pump, hospital-level care is not available in a transportable, comfortable and cost-effective system. If a textile soft-robotic device could be introduced to the employment of blood clot prevention, a medium ground could be accomplished where a patient can obtain hospital-level quality care anywhere with higher comfort. To achieve this goal, textile-based robotics have been considered with the implementation of smart materials into knitted and woven fabrics. This thesis studies and utilizes shape memory alloys, SMAs, as a smart material inside of a woven textile for an outcome of a robotically-controllable fabric. SMAs are a unique material that can transform into a trained or "memorized'' shape when a thermal condition is met. This, along with many super-elastic material properties, including high power and force-to-weight ratios, makes SMAs remarkable for actuation in robotics. SMA integration into fabrics brings a new outcome of functioning fabric-structures through thermal control. However, most SMA research is within the linear scope of actuation due to a hysteresis in the material, as well as the lack of natural recovery and control over the actuation path. This work characterizes bending-force outcomes of SMA actuators within woven structures to develop a massaging sleeve or sock to prevent DVT and PE. Currently, the field of SMA-fabric integration is limited with the research focused on aesthetic and commercial needs. This work will strive to focus on the robotic, medical, and industrial aspects of the integration through the development of a woven SMA-fabric massaging structure. Specific SMA working parameters are experimentally researched and modeled for both linear and bending actuators. These parameters include transformation temperature, power consumption, acceleration, torque and angular displacement. These parameters are controlled through material properties, the annealing process and the actuation parameters of the SMA wire segments. The main outcomes of this research are a bending force study of 60 mm SMA wire segments by themselves and within a woven textile. Proof of concepts of the textile-based robot and compression garment applications are carried out and compared with current implementations and SMA actuators in this field. The progression has the potential to be implemented in the development of a fully woven massaging sock or sleeve to prevent blood clots.
Download or read book Bioinspired Actuators and Sensors written by Minoru Taya and published by Cambridge University Press. This book was released on 2016-10-13 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: From experts in engineering and biology, this is the first book to integrate sensor and actuator technology with bioinspired design.
Download or read book Shape Memory Alloy Engineering written by Antonio Concilio and published by Butterworth-Heinemann. This book was released on 2021-01-13 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape Memory Alloy Engineering: For Aerospace, Structural and Biomedical Applications, Second Edition embraces new advancements in materials, systems and applications introduced since the first edition. Readers will gain an understanding of the intrinsic properties of SMAs and their characteristic state diagrams. Sections address modeling and design process aspects, explore recent applications, and discuss research activities aimed at making new devices for innovative implementations. The book discusses both the potential of these fascinating materials, their limitations in everyday life, and tactics on how to overcome some limitations in order to achieve proper design of useful SMA mechanisms. Provides a greatly expanded scope, looking at new applications of SMA devices and current research activities Covers all aspects of SMA technology - from a global state-of-the-art survey, to the classification of existing materials, basic material design, material manufacture, and from device engineering design to implementation within actual systems Presents the material within a modular architecture over different topics, from material conception to practical engineering realization
Download or read book Design Rules for Actuators in Active Mechanical Systems written by Oriol Gomis-Bellmunt and published by Springer Science & Business Media. This book was released on 2009-10-29 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Design Rules for Actuators in Active Mechanical Systems" deals with the formulation of model-based design rules to be used in the conception of optimized mechatronic and adaptronic systems. The book addresses the comparison of different actuator classes for given applications and offers answers to the following questions: What is the relationship between actuator geometry and primary output quantities? How scalable are actuators based on the same principle? How are energetic output quantities (work and power) related to mechanical load and geometry? How should actuators be designed and sized to obtain the best performance for the chosen actuator kind, and for a given application? "Design Rules for Actuators in Active Mechanical Systems" will be of use to industry professionals, such as actuator and machine designers, as well as to researchers and students of mechanical engineering, mechatronics, and electrical engineering.
