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

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

APMRC, 2012 Digest

Conference_Location

Singapore

Print_ISBN

978-1-4673-4734-1

Type

conf

Filename

6407593