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61. 发明专利

JPS6252385B2 失效
公开(公告)号：JPS6252385B2
公开(公告)日：1987-11-05
申请号：JP17359880
申请日：1980-12-09
申请人： FUJITSU LTD
发明人： MIZOSHITA YOSHIBUMI , HASEGAWA SUSUMU , OKADA SHINJI
IPC分类号： G11B25/04

62. 发明专利

JPS61158083A HEAD POSITIONING CONTROL SYSTEM 失效
公开(公告)号：JPS61158083A
公开(公告)日：1986-07-17
申请号：JP27565384
申请日：1984-12-29
申请人： FUJITSU LTD
发明人： HASEGAWA SUSUMU , UENO TAKAHISA
IPC分类号： G11B5/596 , G11B21/10
摘要： PURPOSE:To improve the positioning control accuracy by using plural triangle waves having different phase as a slice level so as to binary-code the same reproducing signal thereby decreasing the output period of position information to the period shorter than that of binary-coding with one triangle wave. CONSTITUTION:A delay circuit 14 generates the 1st other triangle wave 9 whose phase is delayed by T/3 than a reference triangle wave 8, and the wave 9 is sent to a comparator 17 and a delay circuit 15. The delay circuit 15 generates the 2nd other triangle wave 10 whose phase is delayed by T/3 than the wave 9 and sends it to a comparator 18. Comparators 16-18 compare respectively the inputted triangle wave with a position pulse 7 sent from a servo pulse processing circuit 12 and an output pulse is counted respectively by counters 19-21. The result of count is sent via a selection circuit 22 as position information in timings A, B, C.

63. 发明专利

JPS59119420A Movable element positioning system 失效
标题翻译：可移动元件定位系统
公开(公告)号：JPS59119420A
公开(公告)日：1984-07-10
申请号：JP22837382
申请日：1982-12-27
申请人： Fujitsu Ltd
发明人： HASEGAWA SUSUMU , MIZOSHITA YOSHIBUMI
IPC分类号： G05D3/12 , G05D3/14 , G11B21/08
CPC分类号： G05D3/14
摘要： PURPOSE:To execute exactly positioning to a target position irrespective of a distance in which a target is desired to move, by setting a speed curve corresponding to the distance in which a target is desired to move. CONSTITUTION:A titled system is provided with a speed curve selecting circuit 10 and function generators 3a-3c. In this state, the selecting circuit 10 selects the optimum function generator in accordance with a difference between a present position signal generated from an adder 11 and a target position signal, namely, a distance in which a target is desired to move. An output of this selected function generation is supplied to a + input of an adder 12. On the other hand, the present position signal is inputted to a - input of the adder 12 through a differentiator 4. In this way, since a speed curve corresponding to a distance whose movement is desired is set, positioning can be executed exactly to a target position without being influenced irrespective of a distance in which a target is desired to move.
摘要翻译：目的：通过设定与目标希望移动的距离相对应的速度曲线，无论距离要移动目标的距离如何，都能精确定位到目标位置。构成：具有速度曲线选择电路10和功能发生器3a-3c的标题系统。在这种状态下，选择电路10根据从加法器11产生的当前位置信号与目标位置信号之间的差，即希望移动目标的距离，选择最佳函数发生器。该选择的函数生成的输出被提供给加法器12的+输入。另一方面，当前位置信号通过微分器4输入到加法器12的输入端。这样，由于速度曲线对应于期望移动的距离，无论距目标何时要移动的距离，都可以将定位精确地执行到目标位置而不受影响。

64. 发明专利

JPS58194174A Controlling system of positioning conversion head 失效
标题翻译：定位转换头控制系统
公开(公告)号：JPS58194174A
公开(公告)日：1983-11-12
申请号：JP7724182
申请日：1982-05-08
申请人： Fujitsu Ltd
发明人： MIZOSHITA YOSHIBUMI , HASEGAWA SUSUMU
IPC分类号： G05D3/12 , G11B21/08
CPC分类号： G11B21/081
摘要： PURPOSE:To obtain a stable transient response regardless of the numbers of moving tracks, by changing the acceleration and deceleration in response to the accelerating and decelerating region of a moving position model, corresponding to the number of moved tracks. CONSTITUTION:The number of tracks from the track where a transducer head (e.g., magnetic head) is positioned at present to a track desired to be moved in future, is inputted to an acceleration and deceleration selecting loop 2 and a moving position model calculating loop 3. The optimum acceleration determined depending on the track number is calculated at the acceleration and deceleration selection loop 2, and it is fed to the moving position model calculating loop 3. A feedforward signal determined on the signal value applied to a feedforward signal calculating loop 4 is applied from the calculating loop 3, and a signal corresponding to the sum of the feedforward signal is applied from a power amplifier 12 to a voice coil motor 8 to drive it. Since this driving signal includes the optimum acceleration determined depending on the number of moved tracks, the transient response from the movement with less number of moved tracks to that with many moved tracks is made stable, and the positioning is attained in the possible shortest time regardless of the number of moved tracks.
摘要翻译：目的：通过响应于移动位置模型的加速和减速区域改变对应于移动轨迹数量的加速度和减速度来获得稳定的瞬态响应，而不考虑移动轨迹的数量。构成：将来自传感器头（例如，磁头）的轨道的轨道数量目前定位到将来要移动的轨道的轨迹数量被输入到加速和减速选择循环2和运动位置模型计算循环 3.根据轨道号确定的最佳加速度在加速和减速选择回路2处计算，并被馈送到运动位置模型计算回路3.根据施加到前馈信号计算回路的信号值确定的前馈信号从计算环路3施加4，并且从功率放大器12向音圈电动机8施加与前馈信号的和相对应的信号以驱动它。由于该驱动信号包括根据移动轨迹的数量确定的最佳加速度，所以具有较少数量的移动轨迹到具有许多移动轨迹的运动的瞬态响应变得稳定，并且在可能的最短时间内获得定位的移动轨迹数量。

65. 发明专利

JPS5814381A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPS5814381A
公开(公告)日：1983-01-27
申请号：JP11188481
申请日：1981-07-17
申请人： FUJITSU LTD
发明人： MIZOSHITA YOSHIBUMI , HASEGAWA SUSUMU
IPC分类号： G11B33/14 , G11B23/02
摘要： PURPOSE:To cool the internal air of a disc uniformly and efficiently, by providing a cover at the outside of a disc cover and flowing external air between the two covers with an external fan. CONSTITUTION:The 1st cover 2 completely covers a disc 1 and is led to the external air only through an aspiration filter. The 2nd cover 3 is fitted at the outer air and the external air is led from a hole 4 with fans 6 and 7 and the air is exhausted from the upper and lower part of the center of a spindle 5. Thus, the disc internal air can be cooled uniformly and efficiently.

66. 发明专利

JPH08203226A POSITIONAL SIGNAL DEMODULATION DEVICE OF INFORMATION STORAGE APPARATUS 失效
公开(公告)号：JPH08203226A
公开(公告)日：1996-08-09
申请号：JP1116195
申请日：1995-01-27
申请人： FUJITSU LTD
发明人： AIKAWA KOICHI , HASEGAWA SUSUMU
IPC分类号： G11B21/10 , G11B19/06
摘要： PURPOSE: To obtain a positional signal demodulation device which prevents the influence of a noise even when a high-frequency positional signal is used by reading out a burst signal indicating a positional signal so as to perform a required processing operation, then A/D-converting the burst signal a plurality of times, adding converted results, and generating the positional signal. CONSTITUTION: A burst pattern for a positional signal of a head 5a, which is read out from a magnetic disk 51, is supplied to an A/D conversion circuit 56 via a full-wave rectifying circuit 54 and an LPF 55. The circuit 56 is controlled by a microprocessor unit 5b, and a plurality of conversion processing operations are executed. Then, converted results are added so as to be supplied to a positional signal generation part 57, and the positional signal is generated. By the respective A/D conversion operations and by the addition of the converted results, the A/D converted results are averaged, the influence of a noise is reduced, and the influence of the noise can be prevented even when a high-frequency positional signal is used.

67. 发明专利

JPH06231553A HEAT POSITIONING CONTROLLER 失效
公开(公告)号：JPH06231553A
公开(公告)日：1994-08-19
申请号：JP1654493
申请日：1993-02-03
申请人： FUJITSU LTD
发明人： HASEGAWA SUSUMU
IPC分类号： G11B21/02 , G11B21/10
摘要： PURPOSE:To obtain a head positioning controller in which a positioning accuracy can be improved in a sector servo type disk apparatus. CONSTITUTION:A head positioning controller for a magnetic disk apparatus comprises a double servo system of a roughly positioning control system 4 for driving a VCM 3 having an arm 2 which has a data head 1 and a finely positioning control system 6 for driving a finely moving actuator 5. The controller also comprises feed-forward control means 11 for the actuator 5 in parallel with a finely moving actuator control circuit 7, disturbance data memory means 12 for storing spindle rotation synchronization disturbance data, feed-forward signal generating means 13 for calculating a feed-forward amount in response to the data stored in the means 12, and output switching means 14. The actuator 5 is driven by the circuit 7 at the time of a disturbance decision mode, and driven by the means 11 at the time of a control mode.

68. 发明专利

JPH0632174B2 失效
公开(公告)号：JPH0632174B2
公开(公告)日：1994-04-27
申请号：JP15073984
申请日：1984-07-19
申请人： FUJITSU LTD
发明人： HASEGAWA SUSUMU , MIZOSHITA YOSHIBUMI
IPC分类号： G05D3/12 , G11B5/55 , G11B21/08 , G11B21/10

69. 发明专利

JPH05342784A 失效
公开(公告)号：JPH05342784A
公开(公告)日：1993-12-24
申请号：JP15377792
申请日：1992-06-12
申请人： FUJITSU LTD
发明人： HASEGAWA SUSUMU , UENO TAKAHISA , TAKAISHI KAZUHIKO
IPC分类号： G11B21/08 , G11B21/10
摘要： PURPOSE:To shorten an access time for positioning a data head in a magnetic disk apparatus for positioning the head based on information recorded on a recording medium having a sector. CONSTITUTION:The magnetic disk apparatus comprises a head selecting circuit 16 for selecting a single data head HD0 for reading/writing of a plurality of data heads HD0-HD3 and sequentially selecting all the heads HD0-HD3 for reading. The apparatus further comprises a head positioning control circuit 15 for control the circuit 16 and controlling the selected head HD0 corresponding to even sectors divided on a recording medium 18 and all the heads HD0-HD3 sequentially corresponding to odd sectors.

70. 发明专利

JPH05198111A HEAD POSITIONING CONTROL DEVICE 失效
公开(公告)号：JPH05198111A
公开(公告)日：1993-08-06
申请号：JP780392
申请日：1992-01-20
申请人： FUJITSU LTD
发明人： TAKAISHI KAZUHIKO , HASEGAWA SUSUMU
IPC分类号： G11B21/08
摘要： PURPOSE:To improve positioning precision and operation speed by performing head positioning control in a dual servo system equipped with a coarse adjustment and a fine adjustment actuator. CONSTITUTION:Head position information is read out by a magnetic head 10, and is sent to a position information detecting circuit 21. The position information such as eccentricity of a magnetic disk and deviation from a target track, etc., is detected, and a variation range of the head 10 is measured by a positional variation measuring circuit 35, and then its result is inputted to a control system deciding circuit 36. Hereupon, whether the deviation falls within a displacable range of a fine movement actuator 20 or not is decided. Then, when the deviation falls within a control range, the head 10 is moved to follow in the direction of decreasing the deviation by a dynamic control circuit 31 with servo information from the head 10. Then, when the deviation falls outside the control range, the actuator 20 is controlled to maintain its constant displacement without making the actuator follow the servo information from the head 10 by an average position measuring circuit 32 and a constant displacement instructing circuit 33.

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