Structural Sensitivity Analysis of Thermal Off-Track in Hard Disk Drives.

A study was conducted on the structural sensitivity analysis of the thermal off-track in hard disk drives. Indexes were proposed to measure the influence of the deviated thermal expansion coefficient on the off-track. These were the influence coefficient for each component, the influence coefficient for each connecting part and the regulation coefficient for the deviation of the material for components. The analysis procedure was described, including a modeling step for computational simulation and an evaluation step using the coefficients. The method was applied to a head disk assembly with linear head positioner, and the calculated results were demonstrated in the case study.