磁道密度
cí dào mì dù
- track density
磁道密度-
磁道密度是48道／英寸，磁道数是77。
The track density is 48 tpi and the number of tracks is 77 .
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采用这种单级磁头定位结构，由于音圈电机存在机械谐振和高频不确定性，从而限制了伺服带宽的提高，进一步制约了磁道密度的增加。
Applying this single-stage head positioning structure , due to mechanical resonances and high frequency uncertainties existed in VCM , it is hard to improve the servo bandwidth , and further increase track density .
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为了在极高磁道密度（TPI）的硬盘中快速寻道定位、读取数据，研发了一种新型高带宽驱动器组件。
A novel high bandwidth actuator assembly was developed for the applications of high read / write head tracking in high TPI recording in hard disk drives .