中文摘要：

采用优化设计方法优化一种皮米磁头的形状，能够降低磁头飞高，提高硬盘的存储密度及磁头的飞行稳定性。优化设计以磁头俯仰角和形状尺寸为约束，以磁头在磁盘半径方向内侧、中间、外侧稳定飞行时的飞行高度和侧倾角与优化目标值间的波动最小为优化目标建立优化模型，采用模拟退火算法对优化模型求解。优化结果表明，优化后磁头的飞浮高度可从7nm降低到5nm，而且磁头寻轨时磁头的稳态飞行波动得到明显改善，能够满足工程上对飞高的波动性要求。最后，比较了提高磁盘转速后初始磁头和优化磁头的稳态飞行特性，结果表明磁盘转速对优化结果有影响，改变磁盘转速建立新的优化模型可以得到适合新条件的优化磁头。

英文摘要：

An optimal design scheme for determining geometrical configuration of pico slider is proposed in order to improve the areal magnetic density of hard disk drives and get better steady-state performance. An optimal model is formulated to minimize the variation of flying-height and roll angle from the target values when the slider is at inner diameter, middle diameter and outer diameter of the disk. At the same time, the dimension of the slider and the pitch angle should be constrained in a suitable bound. The method of simulated annealing is utilized to find global optimum solution. Optimization results show that the new slider has lower flying-height and better steady-state characteristics. By comparison of the steady-state performance the new slider and the initial one under the work cases with different rotating speeds of the disk, it is demonstrated that the rotating speed of the disk has a great impact on the optimization results.