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公开(公告)号：BR9301407A
公开(公告)日：1993-10-26
申请号：BR9301407
申请日：1993-04-02
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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公开(公告)号：MY125903A
公开(公告)日：2006-08-30
申请号：MYPI9903012
申请日：1999-07-16
Applicant: IBM
Inventor： SRI-JAYANTHA SRI MUTHUTHAMBY , SHARMA ARUN , DANG HIEN PHU , KAGAMI NAOYUKI , NAKAGAWA YUZO , TOKIZONO AKIRA , YONEDA ISAO
Abstract: METHODS AND SYSTEMS FOR DETECTING AND CORRECTING FOR UNDESIRABLE VIBRATIONS IMPACTING THE SERVO SYSTEMS (20,2020) IN DATA STORAGE DEVICES (10,2010). A DETECTION TECHNIQUE IS PROVIDED WHEREIN A DETECTION FILTER (40,50,140,240,2040) IS CONFIGURED TO SCAN A POSITION SIGNAL OF THE SERVO SYSTEM ACROSS A RANGE OF FREQUENCIES, AND, AT EACH RESPECTIVE SCANNED FREQUENCY, RECORD AN AMPLITUDE ASSOCIATED THEREWITH. THE RECORDED AMPLITUDES ARE EXAMINED TO DETERMINE WHETHER ANY EXCEED A THRESHOLD, THEREBY LOCATING A PEAK FREQUENCY OF THE VIBRATION. USING THE DETECTED PEAK FREQUENCY OF THE VIBRATION, A CORRECTIVE FILTER IS CONFIGURED TO OPERATE ABOUT THE PEAK FREQUENCY OF VIBRATION, THEREBY REDUCING ITS IMPACT ON THE POSITION SIGNAL IN THE SERVO SYSTEM. OPTIMUM DETECTION AND CORRECTION FILTER STRUCTURE ARE DISCLOSED, AS ARE TECHNIQUES FOR ADDRESSING FILTER STATE VECTORS AS INITIAL CONDITIONS AS THE CORRECTIVE FILTERS ARE REPEATEDLY ENGAGED DURING SUCCESSIVE SETTLE-OUT AND TRACK FOLLOW CYCLES (BETWEEN SEEKS), AS ARE CONTINUOUS ADAPTATION TECHNIQUES FOR CHANGING VIBRATION ENVIRONMENTS.FIGURE 7B
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公开(公告)号：DE69602486T2
公开(公告)日：1999-12-09
申请号：DE69602486
申请日：1996-03-26
Applicant: IBM
Inventor： NAKAMURA TAKASHI , YONEDA ISAO , YOKOE YUJI , TSUWAKO KAZUSHI , HARAKO FUJIO , SUDA KATSUMI , NAKAJIMA MICHIO , OGASAWARA KENJI
Abstract: The present invention provides a disk drive apparatus which detects when a signal transducer head contacts a projection, forming a thermal asperity on the recording surfaces of disks, makes the flying height of the signal transducer head lower by changing the rotation speed from the normal rotation speed in read/write operations or by transforming a suspension having a bimetal structure while said signal transducer head is positioned over the detected projection on the track, and makes the signal transducer head strike against the projection to break the projection.
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公开(公告)号：DE69602486D1
公开(公告)日：1999-06-24
申请号：DE69602486
申请日：1996-03-26
Applicant: IBM
Inventor： NAKAMURA TAKASHI , YONEDA ISAO , YOKOE YUJI , TSUWAKO KAZUSHI , HARAKO FUJIO , SUDA KATSUMI , NAKAJIMA MICHIO , OGASAWARA KENJI
Abstract: The present invention provides a disk drive apparatus which detects when a signal transducer head contacts a projection, forming a thermal asperity on the recording surfaces of disks, makes the flying height of the signal transducer head lower by changing the rotation speed from the normal rotation speed in read/write operations or by transforming a suspension having a bimetal structure while said signal transducer head is positioned over the detected projection on the track, and makes the signal transducer head strike against the projection to break the projection.
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公开(公告)号：GB2266388A
公开(公告)日：1993-10-27
申请号：GB9307872
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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Patent Agency Ranking
公开(公告)号：BR9301406A
公开(公告)日：1993-10-26
申请号：BR9301406
申请日：1993-04-02
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum amount of servo information. The power to the electric circuitry of a write or read system and a servo system, which is not needed in the idle state, is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with the timing of the sectors. The power consumption can be reduced by the amount corresponding to turning off the circuitry not needed, plus the amount needed for computing for position control.
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公开(公告)号：GB2266403B
公开(公告)日：1995-08-16
申请号：GB9307916
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum amount of servo information. The power to the electric circuitry of a write or read system and a servo system, which is not needed in the idle state, is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with the timing of the sectors. The power consumption can be reduced by the amount corresponding to turning off the circuitry not needed, plus the amount needed for computing for position control.
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8.发明专利
公开(公告)号：GB2266388B
公开(公告)日：1995-06-21
申请号：GB9307872
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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公开(公告)号：GB2266403A
公开(公告)日：1993-10-27
申请号：GB9307916
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum number of the servo information. The power of electric circuitry of a write or read system and a servo system, which is not needed in the idle state is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with timing of the, sectors. The consumption power can be reduced by the amount corresponding to turning off of the circuitry not needed, plus the amount needed for computing for position control.
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公开(公告)号：JPH1116267A
公开(公告)日：1999-01-22
申请号：JP17056697
申请日：1997-06-26
Applicant: IBM
Inventor： YONEDA ISAO , UCHIIKE HIROSHI , UENO SHINJI , OGASAWARA KENJI
Abstract: PROBLEM TO BE SOLVED: To provide a disk drive device, a loading/unloading device and its control method wherein data reliability is increased by performing stable speed control. SOLUTION: A disk drive device 10 is provided with a VCM spindle driver 12 for rotary-driving a disk 11, an actuator mechanism 14 for moving a head slider having a magnetic head 13 above the surface of a magnet disk 11 and to a retreating position, a lamp block 15 and a CPU/HDC 16 for controlling operations including loading/unloading control, control for the speed of the actuator or data reading/writing in the disk 11. Before performing speed control for loading the actuator on a recording medium, a proper rectangular current wave is first applied so as to release the actuator from its static state by an open loop, then the movement of the actuator caused by the application of the rectangular current wave is immediately measured, whether a proper initial speed is obtained or not is determined and, when a proper initial speed is not obtained, a rectangular current wave is applied again and then the initial condition of speed control is decided based on the measuring result.
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