Download or read book The Modeling and Controlling of Shape Memory Alloy Actuator written by David Arifin and published by . This book was released on 1989 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 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 Alloys written by Dimitris C. Lagoudas and published by Springer Science & Business Media. This book was released on 2008-06-05 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a working knowledge of the modeling and engineering applications of shape memory alloys (SMAs), beginning with a rigorous introduction to continuum mechanics and continuum thermodynamics as they relate to the development of SMA modeling.Modern SMAs can recover from large amounts of bending and deformation, and millions of repetitions within recoverable ranges. SMAs are used in the medical industry to create stents, in the dental industry to create dental and orthodontic archwires, and in the aerospace industry to create fluid fittings. The text presents a unified approach to the constitutive modeling of SMAs, including modeling of magnetic and high temperature SMAs.

Download or read book Modeling and Control of Ferromagnetic Shape Memory Alloy Actuators written by Honghao Tan and published by . This book was released on 2006 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferromagnetic Shape Memory Alloy materials such as Ni-Mn-Ga have attracted significant attention over the last few years. As actuators, these materials offer high bandwidth, large stroke, and high displacement resolutions. In this dissertation, the main interests are to model the constitutive behavior of Ni-Mn-Ga under simultaneously changing fields and stress and design new actuator based on Ni-Mn-Ga.

Download or read book Modeling and Control of Shape Memory Alloy Actuator and Its Application to a Hexapod Biomimetic Robot written by 劉書宏 and published by . This book was released on 2009 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Modeling and Control of Systems with Hysteresis of Shape Memory Alloy Actuators written by Yufeng Wang and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hysteresis widely exists in smart materials such as shape memory alloys (SMAs), piezoelectrics, magnetorheological (MR) fluids, electrorheological (ER) fluids and so on. It severely affects the applicability of such materials in actuators and sensors. In this thesis, problems of modeling and control of systems with hysteresic SMAs actuators are studied. The approaches are also applicable to control of a wide class of smart actuators. Hysteresis exhibited by SMAs actuators is rate-independent when the input frequency is low, and can be modeled by a classical Preisach model or a KP model. The classical Preisach hysteresis model is a foundation of other hysteresis models. In this thesis, traditional methods are explained in advance to identify and implement the classical Preisach model. Due to the extremely large amount of computation involved in the methods, a new form of the Preisach model, linearly parameterized Preisach model, is introduced, and then an effective method to implement the model is presented. The KP model is a more effective operator to describe the Preisach class of hysteresis than the Preisach model. The relationship between the two models is revealed to verify the effectiveness of the KP model. Also, a linearly parameterized KP model is proposed. For both of the Preisach hysteresis model and the KP hysteresis model, algorithms of inverse hysteresis operators are developed, and simulations for modeling and inverse compensation are conducted. Since the Preisach model and the KP model can only describe hysteresis which has saturation states and reverse curves with zero initial slopes, a novel hysteresis model is defined to overcome these shortcomings. The newly defined hysteresis model is a low dimensional hysteresis model and can describe hysteresis which has revertible linear parts and reverse curves with non-zero initial slopes. The problems for controlling systems with input hysteresis have been pursued along three different paths: inverse compensation, gradient adaptive control and robust adaptive control for linear and nonlinear systems. Control schemes of open-loop inverse compensation and gradient adaptive inverse compensation for the Preisach hysteresis model are explored to eliminate the effects of the hysteresis when the output of the hysteretic actuator is measurable. Usually hysteresis of smart actuator in systems is not exactly known, but it can be approximately modeled via the linearly parameterized KP model. For a known linear system preceded by an unknown actuator hysteresis, a model reference control scheme combining with an adaptive inverse compensation is designed for tracking control of the systems. While an unknown linear system preceded by an unknown actuator hysteresis, a model reference adaptive control scheme together with an adaptive inverse compensation is developed for tracking control of the system. Simulations for both cases have been performed to illustrate the control methods. Finally, when hysteresis of smart actuator in systems has a non-measurable output and is modeled via the KP model or the newly defined model, a novel robust adaptive control configuration is presented for tracking control of systems. The analysis for the stability and the convergence of the control systems is conducted. Simulations are performed to verify the effectiveness of the novel control method.

Download or read book Methods for Modeling and Control of Systems with Hysteresis of Shape Memory Alloy Actuators written by Yu Feng Wang and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Inverse Modeling of a Shape Memory Alloy Wire Actuator and Tracking Control with the Model written by Bong Su Koh and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well known that the Preisach model is useful to approximate the effect of hysteresis behavior in smart materials, such as piezoactuators and Shape Memory Alloy(SMA) wire actuators. For tracking control, many researchers estimate a Preisach model and then compute its inverse model for hysteresis compensation. However, the inverse of its hysteresis behavior also shows hysteresis behavior. From this idea, the inverse model with Kransnoselskii-Pokrovskii(KP) model, a developed version of Preisach model, can be used directly for SMA position control and avoid the inverse operation. Also, we propose another method for the tracking control by approximating the inverse model using an orthogonal polynomial network. To estimate and update the weight parameters in both inverse models, a gradient-based learning algorithm is used. Finally, for the SMA position control, PID controller, adaptive controllers with KP model and adaptive nonlinear inverse model controller are compared experimentally.

Download or read book Fault tolerant Control Systems written by Hassan Noura and published by Springer Science & Business Media. This book was released on 2009-07-30 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seriesAdvancesinIndustrialControl aims to report and encourage te- nologytransfer in controlengineering. The rapid development of controlte- nology has an impact on all areas of the control discipline. New theory, new controllers, actuators, sensors, new industrial processes, computer methods, new applications, new philosophies. . . , new challenges. Much of this devel- ment work resides in industrial reports, feasibility study papers, and the - ports of advanced collaborative projects. The series o?ers an opportunity for researchers to present an extended exposition of such new work in all aspects of industrial control for wider and rapid dissemination. Control system design and technology continues to develop in many d- ferent directions. One theme that the Advances in Industrial Control series is following is the application of nonlinear control design methods, and the series has some interesting new commissions in progress. However, another theme of interest is how to endow the industrial controller with the ability to overcome faults and process degradation. Fault detection and isolation is a broad ?eld with a research literature spanning several decades. This topic deals with three questions: • How is the presence of a fault detected? • What is the cause of the fault? • Where is it located? However, there has been less focus on the question of how to use the control system to accommodate and overcome the performance deterioration caused by the identi?ed sensor or actuator fault.

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 Modeling and Design of One Dimensional Shape Memory Alloy Actuators written by Guhan Kumar and published by . This book was released on 2000 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motion of these actuators are modeled for both compression and expansion processes. Experiments are carried out using load cells at various displacements of the actuators, in order to determine the force outputs at various displacements. The experimental results are compared with the models. The force-deflection curves would be expected to correlate to the stress-strain curves because force is analogous to stress and displacement, to strain. These, and other observed phenomena are explained from the point of view of shape memory alloy behavior. There has not been much research dedicated towards designing linear shape memory actuators that would be able to travel both inward and outward depending on the user input from a remote control, which is basically what this research aims to do. A detailed study has also been carried out on the force-displacement relations of these actuators and correlated with the observed behavior of shape memory alloys, which again is a novel feature of this research. The main advantage of shape memory alloys over other smart materials is that they have a very high recoverable strain and force output. These factors contribute chiefly to various potential and existing applications. These compensate for the main disadvantages associated with SMAs, which are heat loss and high power requirements.

Download or read book Shape Memory Actuators for Tab Assisted Control Surfaces written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actuation equations for a tab control system have been derived based on one-dimensional shape memory behavior. This actuation model accounts for the active tendon having to pull against the relaxing tendon in a two-tendon actuator. That is, the passive tendon will provide a negative moment, subtracting from the total moment available for moving the tab. In addition, studies on the heat convection of SMA in water and moving water have been performed in an attempt to determine the available control moment in moving water and to predict the amount of energy needed. These results identify the research issues that must be overcome in making a recommendation regarding the feasibility of using SMA in a submarine for actuation. The result is that use of SMA is feasible, but the exact performance results are not predictable with the current state-of-the-art in SMA modeling. Furthermore, predictive design models specific to applications in moving water are needed to understand the issues of: (1) exact moment prediction, (2) exact heat signature, and (3) control predictions for maneuvering.

Download or read book Modeling and Nonlinear Adaptive Control of SMA Actuation Systems written by Shuo Chen and published by . This book was released on 2008 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns the development and analysis of nonlinear adaptive based control algorithms for composite structures/systems operated with shape memory alloy (SMA) actuators. Addresses the basic design concept for a bi-material actuator modeled as an initially curved composite beam with one or more layers of SMA material, and one or more conventional elastic layers. Establishes a mathematical model characterizing the motion of the composite systems using Lyapunov stability theory and algorithms for linear displacement tracking control. Achieves actuation and control by adjusting the supply current to the SMA actuators.

Download or read book position control with magnetic shape memory actuators written by Leonardo Riccardi and published by Lulu.com. This book was released on 2012-02-26 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic shape memory alloys are promising materials for several applications, such as positioning systems. This book presents the main features of those materials, and then addresses the problem of controlling magnetic shape memory positioning actuators. Two control approaches are introduced, namely a PID control and an adaptive control based on adaptive hysteresis compensation. They are able to handle the presence of hysteresis in the input-output characteristic. The adaptive approach also handles the temperature-dependent behaviour of the nonlinearity. Experimental results performed on several actuator prototypes demonstrate the effectiveness of the control approaches presented here.

Download or read book Issues in the Design of Shape Memory Alloy Actuators written by Stéphane Lederlé and published by . This book was released on 2002 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: