Download or read book Analysis and Control of Magnetic Shape Memory Actuators written by 林致宏 and published by . This book was released on 2016 with total page 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 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 Analysis and Development of a Sensor Concept for Multistable Actuators with Passive Magnetic Shape Memory Alloy written by Patrick Fleischmann and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Performance and Modeling of Magnetic Shape Memory Actuators and Sensors written by Ilkka Suorsa and published by . This book was released on 2005 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Emerging Actuator Technologies written by José L. Pons and published by John Wiley & Sons. This book was released on 2005-09-27 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Actuators are devices that convert electrical energy into mechanical work, traditionally used in electrical, pneumatic and hydraulic systems. As the demand for actuator technologies grows in biomedical, prosthetic and orthotic applications, there is an increasing need for complex and sophisticated products that perform efficiently also when scaled to micro and nano domains. Providing a comprehensive overview of actuators for novel applications, this excellent book: * Presents a mechatronic approach to the design, control and integration of a range of technologies covering piezoelectric actuators, shape memory actuators, electro-active polymers, magnetostrictive actuators and electro- and magnetorheological actuators. * Examines the characteristics and performance of emerging actuators upon scaling to micro and nano domains. * Assesses the relative merits of each actuator technology and outlines prospective application fields. Offering a detailed analysis on current advances in the field, this publication will appeal to practising electrical and electronics engineers developing novel actuator systems. Mechanical and automation engineers, computer scientists and researchers will also find this a useful resource.

Download or read book Characterization and Modeling of Ferromagnetic Shape Memory NiMnGa Actuators written by Xiang Wang and published by . This book was released on 2008 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: It has been shown that a magnetic field induced strain (MFIS) up to 10% can be obtained when Ferromagnetic Shape Memory Alloys (FSMAs) in the NiMnGa system are driven by perpendicular magnetic field and mechanical stresses. Prior experiments on single crystal NiMnGa have demonstrated the existence of reversible strains along the [001] crystallographic axis of a cylindrical rod under the application of collinear magnetic fields and stresses. This unusual behavior is used in this paper to develop a dynamic model for NiMnGa as operated in a solenoid transducer consisting of a driving coil and an external mass-spring-damper loading. A constitutive model to describe the motion of twin boundaries in the presence of energetically strong pinning sites is presented. The effective pinning strength is represented by an internal bias stress oriented transversely. This also explains the reduced maximum MFIS of -0.41% compared to possible -6% obtained from its variant structure. Stochastic homogenization is then used to account for variability in the bias stresses throughout the material and inhomogeneity in the interaction field intensity. Finally, the internal rod dynamics are modeled through force balancing with boundary conditions dictated by the constructive details of the transducer and mechanical load. The model is formulated in variational form, resulting in a second-order temporal system with magnetic field induced strain as the driving mechanism. Model results are compared with experimental measurements for validation and parameter identification. To provide a theoretical understanding of the frequency-dependent power losses in NiMnGa, this dissertation also extends the constitutive hysteresis model by incorporating eddy current and magnetic domain configuration(anomalous) losses; the analytical solutions are compared with finite element simulations. Finally, a parametric analysis of NiMnGa actuator performance based on energy delivery efficiency and the energy conversion efficiency is provided. The optimal stiffness ratios from the classical linear constitutive model and our nonlinear model are experimentally validated. The approach presented is useful for designing a control system, especially for the purpose of designing an energy efficient control system.

Download or read book A Simulation Method for Design and Development of Magnetic Shape Memory Actuators written by Thomas Schiepp and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Shape Memory Materials written by and published by . This book was released on 2008 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 A Phenomenological Constitutive Model for Magnetic Shape Memory Alloys written by Bjoern Kiefer and published by . This book was released on 2006 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thermodynamics-based constitutive model is derived which predicts the nonlinear strain and magnetization response that magnetic shape memory alloys (MSMAs) exhibit when subjected to mechanical and magnetic loads. The model development is conducted on the basis of an extended thermo-magneto-mechanical framework. A novel free energy function for MSMAs is proposed, from which the constitutive equations are derived in a thermodynamically-consistent manner. The nonlinear and hysteretic nature of the macroscopic material behavior is captured through the evolution of internal state variables which are motivated by the crystallographic and magnetic microstructures of MSMAs. Model predictions are presented for different relevant loading cases and analyzed in detail. Finally, magnetostatic boundary value problems for MSMAs are considered and numerically solved using the finite element method. For these computations the developed constitutive model provides the nonlinear magnetic properties of the MSMA. The knowledge of the magnetic field distribution in the computational domain as a function of the applied field, which results from this magnetostatic analysis, is useful for the proper interpretation of experimental results as well as the design of experiments and applications.

Download or read book Shape Memory Materials written by Alicia Esther Ares and published by BoD – Books on Demand. This book was released on 2018-09-26 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shape-memory materials are materials that react under variations of electric or magnetic fields, physical or chemical changes, and that when returning to the initial conditions recover their original form, capable of repeating this process an infinite number of times without deteriorating. The characteristics, fabrication techniques, and thermomechanical treatment of various shape-memory materials are described in detail in this book. The book describes several principles and applications.

Download or read book Accurate and Rapid Control of Shape Memory Alloy Actuators written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Analytical and Computational Analyses of Linear and Radial Shape Memory Alloy Helical Actuators written by Ryan A. Puchaty and published by . This book was released on 2020 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: As access to Shape Memory Alloys (SMAs) has expanded beyond their use as linear wires, the need for characterizing more complex forms that account for the effects of multi-axial stress, strain, and displacement has become increasingly important in actuator design. The novel uses of SMA actuators have also moved the devices into previously unexplored loading conditions, where established theory does not adequately model the real behavior. This work seeks to alleviate some of these issues by addressing problems with the most common multi-axial stress devices: helical springs. New applications are requiring high forces in small spaces, where SMAs’ high work density makes them ideal. It was found in this work that springs with small spring indices (the ratio of the spring diameter over the wire diameter) deviated greatly between data and theory. This result was caused by the residual plastic deformation induced in the material during the manufacturing process. A secondary analysis accounted for this deviation using an empirical loss factor based on the evolving internal strain of the system. This method allows for the accurate prediction of SMA spring deflection of low spring index. Additionally, to better characterize SMA actuators as a whole, the special case of a helical beam was carefully examined. A generalized static helical beam was derived using an analytical load equilibrium approach. This created a set of closed-form equations that solve the internal loadings exactly. Using these loadings, a prediction of the displacements and rotations can be found by expanding upon the Euler - Bernoulli Beam Theory. This generalized static helical beam theory provides a toolset that can predict springs of any section length (full or partial turns) undergoing any multiaxial loading. This work benefitted from the financial support of NASA SBIR Phase 1 (NNX17CM48P) and NASA SBIR Phase II (NNX17CJ07C) sub-awards to UCF.

Download or read book Design Principle of Actuators Based on Ferromagnetic Shape Memory Alloy written by Yuanchang Liang and published by . This book was released on 2002 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: