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首页> 外文期刊>IEEE / ASME Transactions on Mechatronics >Precision Positioning of Hard Disk Drives Using Piezoelectric Actuators With Passive Damping
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Precision Positioning of Hard Disk Drives Using Piezoelectric Actuators With Passive Damping

机译：使用具有被动阻尼的压电执行器精确定位硬盘

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摘要

Positioning precision is crucial to today''''s increasingly high-speed, high-capacity, high-data-density, and miniaturized hard disk drives (HDDs). The demand for higher bandwidth servo systems that can quickly and precisely position the read/write head on a high track density becomes more pressing. The idea of applying dual-stage actuators to track servo systems has been studied. However, the current dual-stage actuator design uses only piezoelectric patches without passive damping. In this paper, we propose a dual-stage servo system using enhanced active–passive hybrid piezoelectric actuators. The proposed actuators will improve the existing dual-stage actuators for higher precision and shock resistance, due to the incorporation of passive damping in the design. We aim to develop this hybrid servo system not only to increase the speed of track seeking but also to improve the precision of track following servos in HDDs. New piezoelectrically actuated suspensions with passive damping have been designed and fabricated. In order to evaluate positioning and track following performances for the dual-stage track servo systems, experimental efforts are carried out to investigate the damping abilities and transmissibilities of the microactuators and to implement the synthesized active–passive suspension structure using a composite nonlinear feedback controller.
机译：定位精度对于当今日益增长的高速，大容量，高数据密度和小型化硬盘驱动器（HDD）至关重要。可以快速，精确地将读/写头定位在高磁道密度上的更高带宽伺服系统的需求变得越来越迫切。已经研究了将双级致动器应用于跟踪伺服系统的想法。然而，当前的双级致动器设计仅使用压电片而不具有被动阻尼。在本文中，我们提出了一种采用增强型主动-被动混合压电致动器的双级伺服系统。由于在设计中加入了被动阻尼，因此拟议的执行器将改进现有的双级执行器，以实现更高的精度和抗冲击性。我们的目标是开发这种混合伺服系统，不仅可以提高寻迹速度，而且可以提高HDD中的磁道跟踪伺服系统的精度。已经设计和制造了具有被动阻尼的新型压电驱动悬架。为了评估双级履带伺服系统的定位和履带跟随性能，进行了实验工作以研究微执行器的阻尼能力和透射率，并使用复合非线性反馈控制器来实现合成的主动-被动悬挂结构。

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