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Author: search.filters.author.Tipsuwanporn, VittayaSubject: search.filters.subject.Hard Disk Drive

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    The design of load/unload algorithm for 2.5'' hard disk drive in SSTW process
    (2012-12-01)
    Nakharin, Watsamon
    ;
    Boonpranchoo, Vichitpon
    ;
    Tipsuwanporn, Vittaya
    ;
    Numsomran, Arjin
    To prevent striking of head to disc in servo track writing process, head velocity is controlled by ramp loading procedure for moving read/write head from ramp to disc surface properly. The author presents the approach to design load/unload algorithm for 2.5'' hard disk drive in SSTW process. The 2 Degree of Freedom PID Control Structure has been applied instead of conventional PID for VCM velocity control. Furthermore; we use Characteristic Ratio Assignment Technique for adjusting PID parameters in order to obtain less overshoot in output response. The experimental results tested with self-servo track writer PH4LC unit have been shown that 2DOF PID algorithm can achieve the performance specification requirement and reducing HDI problem in load/unload control of 2.5'' hard disk drive, efficiently. © 2012 IEEE.
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    The design of PID controller for track following control of hard disk drive using Coefficient Diagram Method
    (2011-12-01)
    Chaoraingern, Jutarut
    ;
    Vaidee, Worapon
    ;
    Trisuwannawat, Thanit
    ;
    Numsomran, Arjin
    ;
    Tipsuwanporn, Vittaya
    This paper presents the design of PID controller for track following control of hard disk drive using Coefficient Diagram Method (CDM). For this reason, Track following control of hard disk drive process has many disturbances from internal and external sources, so determining satisfactory controller parameters to stabilize control system and satisfying response specification is difficult. The proposed PID controller design using Coefficient Diagram Method (CDM) based on proper choosing the coefficients of the characteristic transfer function of the closed loop control system in accordance with stability index and equivalent time constant is applying an uncomplicated and convenience technique to controller design of Track following control in hard disk drive process. Matlab simulation results shown that CDM design is fairly stable and robust whilst giving the convenience in controller's parameters adjustment. © 2011 ICROS.
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    The design of PID controller for track following control of hard disk drive using coefficient diagram method
    (2011-01-01)
    Chaoraingern, Jutarut
    ;
    Vaidee, Worapon
    ;
    Trisuwannawat, Thanit
    ;
    Tipsuwanporn, Vittaya
    ;
    Numsomran, Arjin
    This paper presents the design of PID controller for track following control of hard disk drive using Coefficient Diagram Method (CDM). For this reason, Track following control of hard disk drive process has many disturbances from internal and external sources, so determining satisfactory controller parameters to stabilize control system and satisfy response specification is difficult. The proposed PID controller design using Coefficient Diagram Method (CDM) based on proper choosing the coefficients of the characteristic transfer function of the closed loop control system in accordance with stability index and equivalent time constant is an uncomplicated and convenience technique for applying to Track following control in hard disk drive process. Matlab simulation results shown that PID controller using CDM technique is fairly stable and robust whilst give the convenience in controller's parameters adjustment. © 2011 SICE.