ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: MAGNETOSTRICTIVE ACTUATORSOutlineReference listTo explore further (survival pointers of web references etc)Major applicationsMagnetostrictionSlide 7Slide 8Magnetostrictive ActuatorWorking PrincipleSlide 11Magnetostrictive Actuator SchematicSpecificationsSlide 14AdvantagesSlide 16LimitationsResearch Areas and TrendsSlide 19ManufacturersECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: MAGNETOSTRICTIVE ACTUATORSPrepared by:Deepti R PatlollaDept. of Electrical and Computer Engineering Utah State UniversityE: ; T: (435)797-; F: (435)797-3054 (ECE Dept.)02/24/200701/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further–Major applications–Basic working principle illustrated–A typical sample configuration in application (application notes)–Major specifications–Limitations–And many more relevant issues in applications (such as, how to choose, cost information, where to buy etc.)01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list•http://www.mide.com/pdf_html/Magnetostrictive_Actuators.htm•http://www.energeninc.com/pdf/Actuator2000June2000.pdf•http://www.lpa.uni-saarland.de/pdf/Sens03arteng_final.pdf•http://www.me.sc.edu/research/AARG/magnetostrictive_actuators.htm•http://www.cedrat.com/applications/hardware/doc/ASSET2002_MAGNETOSTRICTIVE_vs_PIEZO_ACTUATORS.pdf•http://www.public.iastate.edu/~terfenol/homepage.html01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4To explore further (survival pointers of web references etc) •http://www.energeninc.com/pdf/Cryogenic%20Magnetostrictors.pdf•http://ieeexplore.ieee.org/iel5/8980/28507/01273841.pdf•http://adsabs.harvard.edu/abs/1996SPIE.2721..385K01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5Major applications •Ultrasonic cleaners• High force linear motors• Positioners for adaptive optics• Active vibration or noise control systems• Medical and industrial ultrasonics• Pumps •Sonar01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6Magnetostriction•Magnetostriction is the material property that causes a material to change its length when subjected to an electro-magnetic field.•Magnetostriction properties also cause materials to generate electro-magnetic fields when they are deformed by an external force.•The magnetostrictive materials are referred to as the Rare-Earth's.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7•Terfenol-D is a commercially available magnetostrictive material that has high magnetostriction at room temperatures•The difference between traditional magnetostrictive materials and giant magnetostrictive materials is the amount of strain per unit volume of the material. Giant magnetostrictive materials undergo large amounts of strain (i.e., large deformations) for a given applied magnetic field. Terfenol-D and Metglass come under the giant category.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8•. Typically a magnetostrictive rod is placed inside a coil•They exhibit large output forces and quick dynamic responses.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Magnetostrictive Actuator•A coil is located around the rod which produces the necessary magnetic field for actuation operation. For a defined field production and field reduction the coil is driven with a given driving current I.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10Working Principle•The basic idea is to squeeze a rod of Terfenol-D into a metal tube whose bore size is just slightly smaller than the rod's diameter, wrap a series of electromagnetic induction coils around the tube (or stator), and use the coils to generate a moving magnetic field that courses wavelike down the successive windings along the stator tube.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11•As the traveling magnetic field causes each succeeding cross section of Terfenol-D to elongate, then contract when the field is removed, the rod will actually "crawl" down the stator tube like a worm. Repeated propagating waves of magnetic flux will translate the rod down the tube's length, producing a useful stroke and force output.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Magnetostrictive Actuator Schematic01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13Specifications•Ref:http://www.mide.com/pdf_html/Magnetostrictive_Actuators.htm01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-1401/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-15Advantages•Other actuation materials, such as piezo-electric crystals, require high voltages (200 - 300 Volts) to produce desired mechanical deformations, whereas magnetostrictive materials respond to significantly lower voltages.•Magnetostrictive materials do not decay over time—experience less hysterisis. •A magnetostrictive device is fairly robust as far as wear and tear are concerned.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-16•Giant Magnetostrictive Materials have very low Young’s Modulus which is an advantage for producing low-frequency resonators of compact size. •It exhibits higher dynamic strain at resonance.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-17Limitations•Usually temperature dependent.•These actuators can have problems when overheated. However, they can be made functional again at reasonable temperatures.•Exhibit small displacements.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-18Research Areas and Trends•Energen, Inc. developed compact actuators based on magnetostrictive materials. These actuators are designed to provide precision positioning and active control of adaptive optical surfaces.•Magnetostrictive actuator-based micropositioner and its application in turning.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-19•Design of a smart
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