Optimal control design for hard disk drive servosystems
Optimal control design for hard disk drive servosystems
- Author(s): G. Guo ; R. Chen ; T.S. Low ; Y. Wang
- DOI: 10.1049/ip-cta:20020233
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- Author(s): G. Guo 1 ; R. Chen 1 ; T.S. Low 1 ; Y. Wang 2
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View affiliations
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Affiliations:
1: DSI Building, Data Storage Institute, Singapore
2: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
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Affiliations:
1: DSI Building, Data Storage Institute, Singapore
- Source:
Volume 149, Issue 3,
May 2002,
p.
237 – 242
DOI: 10.1049/ip-cta:20020233 , Print ISSN 1350-2379, Online ISSN 1359-7035
The authors present an optimal robust controller design for hard disk drive (HDD) actuator servosystems using direct parameter optimisation taking into account stability restrictions. First, the HDD actuator model is augmented with a state observer. A bound of the stable feedback gain is then calculated by solving a Riccati equation considering the plant parameter uncertainties. To improve the system transient and steady-state performance, the control parameters are selected inside the feedback gain bound using the random neighbourhood search method. Both simulation and implementation results show that an improved digital controller can be obtained for the uncertain HDD plant.
Inspec keywords: hard discs; servomechanisms; feedback; disc drives; control system synthesis; uncertain systems; robust control; digital control; observers; actuators; optimal control; Riccati equations; stability criteria
Other keywords:
Subjects: Simulation, modelling and identification; Storage on moving magnetic media; Control system analysis and synthesis methods; Optimal control; Actuating and final control devices; Stability in control theory
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