Title :
Contact mechanics of traveling wave ultrasonic motors
Author :
Shengnan Shen ; Heow Pueh Lee ; Siak Piang Lim ; Chong Jin Ong
Author_Institution :
Dept. of ME, Nat. Univ. of Singapore, Singapore, Singapore
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
In the pursuit of high areal recording density towards 10 Tb/in2, it is necessary to improve the positioning accuracy of the magnetic head in the hard disk drive head-positioning control system. Ultrasonic motor is well used in positioning control. Therefore, contact stresses can exist in the friction material and rotor. Obtaining the details of the stress distribution due to the inelastic deformation is important. A contact model of traveling wave ultrasonic motor (TWUSM) is proposed. A two dimensional finite element model between stator and friction material is then developed. The evolution of deformation in friction material and rotor due to the mechanical surface loading is presented by von mises stress.
Keywords :
deformation; disc drives; finite element analysis; hard discs; magnetic heads; magnetic recording; position control; rotors; stators; ultrasonic motors; contact mechanics; contact model; contact stresses; friction material; hard disk drive; head-positioning control system; high areal recording density; inelastic deformation; magnetic head; mechanical surface loading; positioning accuracy; rotor; stator; stress distribution; traveling wave ultrasonic motors; two dimensional finite element model; von mises stress; Acoustics; Friction; Materials; Rotors; Stators; Strain; Stress; Ultrasonic motor; elastic-plastic deformation; finite element method;
Conference_Titel :
APMRC, 2012 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-4734-1
