The track density of HDD is increasing rapidly as the recording density drastically increases, which leads to the need for a higher servo bandwidth. To this end, a dual actuator system for HDD has been suggested as a possible solution. Furthermore, the suspension resonance frequency in the radial access direction is becoming a more important factor for the servo bandwidth increase. However, the improvement of these frequencies may affect the shock resistance performance and spring constant. In this work, we have investigated a suspension design scheme possessing a microactualor as a dual actuator and also achieving high-mechanical resonance frequencies, shock resistance characteristics, and a low-spring constant. Using finite element analysis, the design parameters, which play key roles for dynamic characteristics of a suspension, are investigated. Design parameters are deduced based on physical insight and obsen-ations. It is confirmed that the proposed suspension has the capability affine tracking motion as a microactuator, due to its hinge structure on the spring region, and achieves higher mechanical resonance frequencies in the 2nd torsion mode and sway mode with a high-shock resistance and a low-spring constant.
|Number of pages||5|
|Journal||Journal of Information Storage and Processing Systems|
|Publication status||Published - 2001 Jan 1|
All Science Journal Classification (ASJC) codes