Modelling of magnetostrictive thin films, application. A systematic approach to calculate magnetic dynamics and magnetostriction is presented. Sensors and actuators a 157 2010 185197 contents lists available at sciencedirect sensors and actuators a. The present invention relates to an apparatus for determining a mechanical force of an actuator on a movable aircraft component. Highpower magnetostrictive actuators can deliver forces greater than 50 mpa with strains of up to 0. One of the most frequent applications of magnetostrictive actuator technology is the active structural vibration control avc. Magnetostrictive actuators play an important role in the perception of usefulness of smart materials and devices.
Cryogenic magnetostrictive actuators and stepper motors. Magnetostrictive resonators as sensors and actuators. Magnetostrictive linearposition sensors sizing and applying magnetostrictive linearposition sensors technical paper linearposition sensors all specifications are subject to change. This effect is mainly used in magnetostrictive actuators. Richard, elizabeth holleman and david eddleman abstract. Integral feedback control of a selfsensing magnetostrictive.
A magnetostrictive actuator has magnetostrictive element having a magnetostrictive, a driving rod moving in a displacement direction of the magnetostrictive element, which is connected with the magnetostrictive element and made of a ferromagnet, a solenoid coil applying magnetic field to the magnetostrictive element, which is arranged around the magnetostrictive element, an enclosure enclosing. Find magnetostrictive linear actuators related suppliers, manufacturers, products and specifications on globalspec a trusted source of magnetostrictive linear actuators information. The latter effect forms the basis for the inherent sensory capability of the magnetostrictive material. The model proposed in this dissertation is a bulk model and describes the behaviour of a magnetostrictive actuator by a system with 4 states. Design and construction of magnetostrictive actuators magnetostrictive materials can be also used to produce an effective actuator. At moderate to high drive levels, the output from these actuators is highly nonlinear and contains significant magnetic and magnetomechanical hysteresis. The program is an effort to use smart materials to adjust or finetune the shape of the airfoil cross section of an aircraft wing in flight, reduce aerodynamic drag, boost payload capacity, cut fuel use, and improve maneuverability. A nonlinear optimal control method for magnetostrictive actuators. Magnetostrictive actuators compared to piezoelectric actuators. Fe core magnetostrictively extendscontracts under ac. Constitutive relationship of magnetostrictive materials consists of a sensing and an actua. Nonlinear optimal control techniques for vibration attenuation using magnetostrictive actuators william s. Design and application of magnetostrictive ms materials citeseerx. However, the nonnegligible hysteresis and complexity of their characteristics make the design and control quite difficult.
Author links open overlay panel kewei zhang lin zhang liling fu suiqiong li huiqin chen z. A highly sensitive, noncontact torque sensor was developed using amorphous magnetic alloy. A thin strip of amorphous magnetic alloy was bonded onto the surface of the shaft, formed into a chevron shape, then the torque applied to the shaft was detected from the difference in the inductance of the d. This document is highly rated by students and has been viewed 243 times. A systematic approach to calculate magnetic dynamics and magnetostriction is.
These actuators are designed to provide precision positioning and active control of adaptive optical surfaces such as those that are being considered for the next generation space telescope ngst. Wang and buschvishniac devised a twodimensional micropositioner by conjugating two linear magnetostrictive actuators 5. Magnetostrictive materials for sensors and actuators. Highfield characterization of piezoelectric and magnetostrictive actuators. Optimal tracking using magnetostrictive actuators operating. A cantilever beam, embedded with mma and subjected to free vibration was chosen for this work. Their applications are potentially wider than that of piezoelectric actuators because of the higher energy density and intrinsic robustness. Bond graphs for magnetostrictive actuators magnetostriction strain smn smnhi, tjk induced by stress tjk induced by magnetic field hi present in most ferromagnetic materials iron, nickel, cobalt, rare earths magnetostrictive strains. Handbook of giant magnetostrictive materials 1st edition. Actuators using innovative linear motors of this type are being developed as part of the u. Figure 12a shows the typical layout of a magnetostrictive actuator. Magnetostrictive actuators are one of the most exciting new actuator technologies available today.
The magnetostrictive actuators are activated by magnetic field and thus are suitable for wireless or noncontact cases. Magnetostrictive materials are surveyed in the context of sensor and actuator applications. Pdf giant magnetostrictive actuators for active vibration. The magnetostrictive actuators are solid state magnetic actuators. At moderate to high drive levels, the output from these actuators is highly nonlinear. Computational micromagnetics for magnetostrictive actuators. Development of a novel linear magnetostrictive actuator. Mechanics based models for struts fitted with piezoelectric and magnetostrictive actuators are developed, and for harmonic disturbances, a. The recent material advances in the area of magnetostriction, mainly terfenold, have created new design options for mechanical and electrical engineers alike.
It consists of a terfenold bar surrounded by an electric coil. The apparatus according to the invention comprises a shaft, in particular a solid or hollow shaft, for transmitting force andor torque to the actuator, wherein the shaft has a first region remanently magnetized in a first circumferential direction. The book covers the physical origin of giant magnetostriction, its manufacturing and metallurgy, and grain related processes under operation. In particular, much effort has been focused on pdf identification methods and on the inversion of pm, with the aim to obtain compensator or pseudocompensator. These characteristics make them suitable for a variety of vibration control applications. Modeling and control of magnetostrictive actuators wei zhang university of kentucky right click to open a feedback form in a new tab to let us know how this document benefits you. A nonlinear optimal control method for magnetostrictive. This paper proposes a hybrid model for the actuation system considering the coupling of the actuator and the ampli. This dissertation presents the development of a novel linear magnetostrictive actuator. Application of a magnetostrictive actuator sciencedirect. Pdf giant magnetostrictive actuators are designed and fabricated with. Magnetostrictive mini actuators for smart structure. Review of modeling and control of magnetostrictive actuators.
Actuators are devices that convert electrical energy into mechanical work, traditionally used in electrical, pneumatic and hydraulic systems. Review of modeling and control of magnetostrictive actuators mdpi. Thermomagnetic optimization of solenoidal magnetostrictive actuators david c. The most useful one to refer to is the joule effect. Chapter 2 constitutive relationship of magnetostrictive. Introduction of magnetostrictive ms technology magnetostriction ms is the change in shape of materials under the influence of an external magnetic field. Smith journal of intelligent material systems and structures 2007 19. Mar 24, 2005 providing a comprehensive overview of actuators for novel applications, this excellent book. This paper addresses the development of a nonlinear optimal control methodology for magnetostrictive actuators.
However, the nonnegligible hysteresis and complexity of their characteristics make the design and control quite difficult and has limited. Magnetostriction occurs in the most ferromagnetic materials and leads to many effect. Pdf giant magnetostrictive actuators for active vibration control. Pdf magnetostriction occurs in the most ferromagnetic materials and leads to many effect. Magnetostrictive type torque sensor sae international. The magnetostrictive effect was first described in the 19th century 1842 by an english physicist james joule. Ratedependent losses modeling for magnetostrictive actuators. Despite these characteristics, magnetostrictive actuators have until now been used only where no rapid switching processes. 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.
Marshall space flight centers valves, actuators and ducts design and development branch developed a large scale magnetostrictive valve actuator. Magnetostrictive actuators are one of the most exciting. Magnetostrictive actuators are one of the most exciting new. The actuators were installed in stages in the bottom part of the column of a h section. On the other hand, the electrostrictive actuator has much less hysteresis, i. Integral feedback control of a selfsensing magnetostrictive actuator figure 1. Hence, the frequency bandwidth of the magnetostrictive actuators is mainly limited by the eddy currents.
Presents a mechatronic approach to the design, control and integration of a range of technologies covering piezoelectric actuators, shape memory actuators, electroactive polymers, magnetostrictive actuators and electro and magnetorheological actuators. Pdf magnetostrictive actuators compared to piezoelectric actuators. Mechanics based models for struts fitted with piezoelectric and magnetostrictive actuators are developed, and for harmonic disturbances, a linear dynamic formulation describing the motion of the actuators is integrated with the formulation describing wave transmission through the strut. Pdf highfield characterization of piezoelectric and. The potential advantages of this technology are faster. Smart materials and structures, volume 3, number 4. The variation of materials magnetization due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value. Maillard magnetostrictive actuators compared to piezoelectric actuators, proc. This paper investigates the feasibility of using embedded magnetostrictive mini actuators mma for smart structure applications, such as vibration suppression of beams.
Article in press journal of magnetism and magnetic materials 272276 2004 e1781e1782 ratedependent losses modeling for magnetostrictive actuators d. Pdf magnetostrictive actuators compared to piezoelectric. Download limit exceeded you have exceeded your daily download allowance. Giant magnetostrictive actuator gma may be a promising candidate actuator to drive an electronic controlled injector as giant. Development of resonators with reversible magnetostrictive effect. An actuator of compact construction responds to an electrical drive signal very quickly and can produce large actuation forces. The temposonics technology, based on magnetostriction, does not rely on moving parts and is not exposed to mechanical stress. Modeling and adaptive control of magnetostrictive actuators. In order to investigate the possibility, a smart structure was tested for active vibration control of frame structures, in which bending moment of the columns was controlled by magnetostrictive actuators integrated into the columns. Monolithic magnetostrictive materials typically have a high electrical conductivity. Magnetostrictive materials mrs bulletin cambridge core. Computational micromagnetics plays an important role in design and control of magnetostrictive actuators.
Download pdf info publication number wo2015078724a1. The well known limitation of smart actuators that are based on electromagnetothermoelastic behaviors of smart materials is the complex, inputrate dependent, hysteretic behavior of the latter. A model of magnetostrictive actuators for active vibration. A nonlinear physicsbased optimal control method for. Theory of operation a magnetostrictive position sensor measures the distance between.
Design and model for the giant magnetostrictive actuator used on an. This document is highly rated by civil engineering ce students and has been viewed 152 times. Giant magnetostrictive actuators for active vibration control article pdf available in smart materials and structures 3. Modeling and optimization of magnetostrictive actuator. Find magnetostrictive actuator related suppliers, manufacturers, products and specifications on globalspec a trusted source of magnetostrictive actuator information. Magnetostrictive materials can be used as both the sensors and actuators in such materials. 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. In response to a traveling magnetic field inside the terfenold element, it moves in the opposite direction with a peristaltic motion. Please contact mts for specifications that are critical to your needs. Pdf design, analysis and simulation of magnetostrictive actuator. Maillard magnetostrictive actuators compared to piezoelectric actuators. Nonlinear optimal control techniques for vibration. Magnetostrictive actuators are commonly used in precision engineering with the advantages of high resolution and fast response. Wonjong kim this thesis presents the design of various closedloop realtime control of a novel linear magnetostrictive actuator.
Principal structure of a magnetostrictive actuator. Magnetostrictive actuators mas can deliver highoutput forces and can be driven at high frequencies. Optimal tracking using magnetostrictive actuators operating in nonlinear and hysteretic regimes william s. Since the speed of the ultrasonic wave in the waveguide is precisely known, the time required to receive the return signal can be converted into a linear position measurement with both high accuracy and repeatability. Wo2015078724a1 magnetostrictive sensor for actuators in. Drive elements whose physical volume is considerably smaller than piezoelectric actuators for comparable mechanical characteristics and actuation travels can be developed on the basis of the magnetostrictive material tb x dy 1x fe 2 terfenol. The invention further relates to a drive system for flaps and or slats of. The magnetostrictive material used here is terfenold, an alloy of the formula tb0. Recommended citation zhang, wei, modeling and control of magnetostrictive actuators 2005. Despite these characteristics, magnetostrictive actuators have until now been used only where no rapid switching processes or actuation movements are required. The output force of the magnetostrictive actuator versus. View the article pdf and any associated supplements and figures for a period of 48 hours. Magnetomechanical coupled magnetostriction model for terfenol. Magnetostrictive mini actuators for smart structure applications.