WELCOME<br /> SOORAJ VRROL NO : 25S6, PE..<br />
mechatronics<br />TOPIC<br /><ul><li>Active vibration control using magnetostrictivetransducers
Fiber optic devices in mechatronics</li></li></ul><li>magnetostriction<br />Magnetostriction is a property of ferromagnetic materials that causes them to change their shape or dimensions during the process of magnetization. <br />The variation of material's magnetization due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value, λ.<br />
Magnetostrictive material<br /><ul><li>Magnetostriction is a property of certain material(nickel,iron,cobalt and respective alloys).
Magnetostrictive materials can convert magnetic energy into kinetic energy, or the reverse, and are used to build actuators and sensors.
Capable to produce strain on the order of 2000ppm.</li></li></ul><li>transducer<br />
Active vibration control using magnetostrictive transducer<br /><ul><li>Vibration of a structure is reduced by applying counter force to the structure that is appropriate out of phase but equal in force and amplitude to the orginal vibration.
It consist of CONTROL SYSTEM, VIBRATING STRUCTURE, and ACTUATER.</li></li></ul><li>Active vibration control system<br />
Components<br />Accelerometer: motion sensor<br />Control: high speed microprocessor based system<br />Actuator: magnetostrictive type ,piezoelectric material <br />
Structural vibration can be reduced effectively</li></ul>advantages <br />
Appliation<br />Isolation of microelectronics and signal processing unit.<br />Precision manufacturing area<br />Controlling vibration in cutting tool<br />Automotive industry<br />Machine tools…<br />
<ul><li>Magnetotrictive transducer</li></ul>Basic element of the actuators consist of:<br />The coil that encloses the magnetostrictive rod.<br />Magnetic poles that conduct the flux to the rod.<br />The DC flux from the permanent magnet to rod,<br />Th air gap that allows the rod to expand and contract freely.<br />The head and tail mass or the base , and spring system and provided to give proper preload to the rod.<br />
Light can modulated and transmitted over large distance.
An optical fiber consists of a core, cladding, and a buffer (a protective outer coating), in which the cladding guides the light along the core by using the method of total internal reflection. The core and the cladding (which has a lower-refractive-index) are usually made of high-quality silica glass.</li></li></ul><li>
THANK YOU…<br /> SOORAJ VR<br /> ROLL NO : 25<br /> S6, PE<br />