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Discrete-time LQG/LTR dual-stage controller design and implementation for high track density HDDs

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4 Author(s)
Xiaoping Hu ; Data Storage Inst., Nat. Univ. of Singapore, Singapore ; Wei Guo ; Tony Huang ; B. M. Chen

This paper presents a LQG/LTR tracking servo design on a dual-stage actuator in hard disc drives (HDDs). The dual-stage actuator is considered as a multivariable plant rather than two independent actuators. Simulation and implementation results show that a bandwidth of 1.5 kHz is achieved. The settling time for step response is reduced to 0.6 ms. The track misregistration is reduced to 0.044 μm

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American Control Conference, 1999. Proceedings of the 1999  (Volume:6 )

Date of Conference: