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- W2031721463 abstract "DVD player is regarded as a mature and low-cost commercial product for multimedia and computer data storage. Fundamentally the pickup head is a key part of the DVD player and it uses focused laser beam to read the data on the DVD disk tracks whose width is approximately 0.74μm. This research focused on the control aspect applied to a DVD pickup head for the development of an auto-focusing laser probe. Practically, the laser pickup head has the S-curve linearity property with the measuring range of about 7μm [3]. To extend the measurement range, the feedback control of VCM in the focusing direction is needed. This study used Genetic Algorithms (GAs) to search for appropriate PID gains for VCM control. In MATLAB simulation, the GAs tuning scheme could produce the optimised gains within less than 0.02 sec. Moreover, the experimental results demonstrated that the VCM auto-focusing measurement range could be extended to 1350μm." @default.
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- W2031721463 date "2006-01-01" @default.
- W2031721463 modified "2023-10-16" @default.
- W2031721463 title "A Genetic Approach on the PID Control of VCM for Auto-Focusing Laser Probe" @default.
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- W2031721463 doi "https://doi.org/10.4028/www.scientific.net/msf.505-507.373" @default.
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