Method and apparatus reducing off-track head motion due to disk vibration in a hard disk drive through the head gimbal assembly

摘要

The improved head gimbals assembly for reducing the track of the hard disk drive misregistration (TMR, Track Mis-Registration) is provided. The head gimbal assembly, and is mechanically simple as a conventional head gimbals assembly, and support the slider on the flat surface of the disc parallel to the streamer, reduces the TMR caused by disk vibration. The head gimbal assembly is improved, when compared at the same rotational speed and the track density, the manufacturing is easy compared to other known methods, and more reliable, less costs. And a head gimbal assembly includes an improved mechanism for all three sets of flat surface when the disk has moved performed even a slider to the disk surface, the slider has a move when the curved surface of the disc in the radial direction toward the track. A first mechanism and the third mechanism, and it may be used with the second mechanism and the third mechanism, the head gimbal assembly. ; Is improved and this method brings the servo controller provides a distinct improvement in the overall performance PES, in particular, leads to enhanced when applied to a hard disk drive employing a TMR reduction mechanism of the present invention. The servo controller is to improve the removal of the low frequency oscillation at the expense of gain in the disk vibration frequency range. This results in a minimum of PES statistical results when applied to a hard disk drive with a TMR reduction mechanism of the present invention. ; The head gimbal assembly, the hard disk drive