Fem and Experimental Analysis of the Actuator ‘Butterfly Mode’ in a Hard-Disk Drive

Heat transfer and flow characteristics in the hard disk drive tester

“…To study the airflow pattern inside the tester, the results plotted in vertical and horizontal plane cutting across the hard disk drive air volume. Because there is almost no data as in the open literature [1][2][3][4][5][6][7][8][9] on the heat transfer and flow characteristics in the hard disk drive tester, none of these papers reported the heat transfer and flow characteristics in the tester. In order to obtain the numerical results, unsteady calculations are conducted for flow in the hard disk drive tester and reasonable agreement with the present experimental data as shown in Fig.…”

“…Luk et al [3] applied the adhesive bonding techniques in hard disk drive head assembly. Liu et al [4] studied on the recording track density in hard-disk drives. Effect of the butterfly mode was investigated using finite element analysis.…”

Vibro-acoustic interaction of microsystem components in data storage devices

“…One particular mode that limits the bandwidth is the butterfly mode (Liu et al, 2003). It is the result of the sway mode in the arm and coil plus the translational motion of the pivot cartridge.…”

“…A theoretical model of the actuator rocking mode was proposed and verified by experiments to show its significant impact on servo stability (Liu et al, 2002). The butterfly mode was investigated in terms of FEM and experiment analysis (Liu and Lim, 2003). The effect of the pivot assembly on the dynamic behavior of the VCM/actuators assembly was also explored (Gao et al, 2000;Xu et al, 2001).…”