This document discusses active vibration control using magnetostrictive transducers. It first defines magnetostriction as a property of ferromagnetic materials where their shape or dimensions change with magnetization. Magnetostrictive materials can convert between magnetic and kinetic energy and are used to build actuators and sensors. An active vibration control system uses a magnetostrictive transducer as an actuator along with an accelerometer and control system to apply counter forces that reduce structural vibrations. Magnetostrictive transducers consist of a magnetostrictive rod within a coil that is preloaded with poles and mass/springs. Active vibration control has advantages like high sensitivity and accuracy in reducing vibrations in applications like manufacturing machinery. F

1. WELCOME SOORAJ VRROL NO : 25S6, PE..

2. mechatronicsTOPICActive vibration control using magnetostrictivetransducers

3. Fiber optic devices in mechatronicsmagnetostrictionMagnetostriction is a property of ferromagnetic materials that causes them to change their shape or dimensions during the process of magnetization. The variation of material's magnetization due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value, λ.

4. Magnetostrictive materialMagnetostriction is a property of certain material(nickel,iron,cobalt and respective alloys).

5. Magnetostrictive materials can convert magnetic energy into kinetic energy, or the reverse, and are used to build actuators and sensors.

6. Capable to produce strain on the order of 2000ppm.transducer

7. Active vibration control using magnetostrictive transducerVibration 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.

8. It consist of CONTROL SYSTEM, VIBRATING STRUCTURE, and ACTUATER.Active vibration control system

9. ComponentsAccelerometer: motion sensorControl: high speed microprocessor based systemActuator: magnetostrictive type ,piezoelectric material

10. Type of actuators

11. Highly sensitive

12. Highly accurate

13. Structural vibration can be reduced effectivelyadvantages

14. AppliationIsolation of microelectronics and signal processing unit.Precision manufacturing areaControlling vibration in cutting toolAutomotive industryMachine tools…

15. Magnetotrictive transducerBasic element of the actuators consist of:The coil that encloses the magnetostrictive rod.Magnetic poles that conduct the flux to the rod.The DC flux from the permanent magnet to rod,Th air gap that allows the rod to expand and contract freely.The head and tail mass or the base , and spring system and provided to give proper preload to the rod.