Stretching servo performances on a spin stand

Lu Feng, Wai Ee Wong, Chunling Du, Chang Duan, Guo Xiao Guo, Tow Chong Chong, Weichun Ye

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


To support a higher track recording density for future generation magnetic recording systems on a conventional spin stand, good servo controllers and high-bandwidth actuators are needed. In this work, we add an additional sub-stage piezo actuator with sub-nm resolution to an existing spin stand system. The combination of a frequency-encoded servo pattern and a simplified decoding scheme is applied to generate the position error signal (PES) by means of an external PC-based servo system. Various servo control techniques, namely, PID control, near-perfect modeling (NPM) low-hump design, low hump H control and feed-forward RRO compensation are designed and implemented on the same platform. Control performance comparison is then made and the experimental results show that PES 3σ is improved by up to 23.7% with the low-hump design together with the feedforward RRO compensation.

Original languageEnglish (US)
Pages (from-to)1159-1164
Number of pages6
JournalProceedings of the American Control Conference
StatePublished - 2004
Externally publishedYes
EventProceedings of the 2004 American Control Conference (AAC) - Boston, MA, United States
Duration: Jun 30 2004Jul 2 2004

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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