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公开(公告)号：US3731177A
公开(公告)日：1973-05-01
申请号：US3731177D
申请日：1971-12-15
Applicant: IBM
Inventor： COMMANDER R , DIXON J
CPC classification number: G05D3/14 , G05B19/23 , G11B5/5547
Abstract: According to the present invention a movement control system comprises a motor for moving said body into a required position, a motor control unit for controlling the acceleration and deceleration of said motor, a position indicator unit producing positioning signals corresponding to movement of said body while accelerating toward said required position, and a calculating unit responsive to position data representing said required position and to said positioning signals to produce a control signal for said motor control unit to change from acceleration to deceleration in order to provide required speed/position characteristics for the movement of said body.
Abstract translation: 根据本发明，一种运动控制系统，包括用于将所述身体移动到所需位置的马达，用于控制所述马达的加速和减速的马达控制单元，位置指示器单元，产生与所述身体的运动相对应的定位信号，同时加速 朝向所述所需位置，以及计算单元，响应于表示所述所需位置的位置数据和所述定位信号，以产生用于所述电动机控制单元从加速变化到减速的控制信号，以便为所述运动提供所需的速度/位置特性 的身体。
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公开(公告)号：BR7604808A
公开(公告)日：1977-08-02
申请号：BR7604808
申请日：1976-07-23
Applicant: IBM
Inventor： CASE W , COMMANDER R
Abstract: Data track positioning information for data tracks on a stack of recording disks is provided by servo information pre-recorded on one surface of the stack. In addition, each data track on the remaining surfaces of the stack has servo information relative to that track pre-recorded in sectors around the track. Track following operations are controlled in a closed loop servo system using on-track position information derived from the sectored servo tracks associated with the track being followed. The bandwidth of the position error signal derived from the sectored servo information is increased by adding high frequency components obtained from the continuous servo information on the servo surface. Track access operations are controlled using track crossing information derived from the pre-recorded servo information on the servo surface.
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Patent Agency Ranking
公开(公告)号：BR7708548A
公开(公告)日：1978-08-15
申请号：BR7708548
申请日：1977-12-21
Applicant: IBM
Inventor： COMMANDER R , GARDNER P
Abstract: A data storage apparatus, such as an accessing head magnetic disk file, includes at least one data disk surface and a servo disk surface. In operation, a continuous position signal having high frequency components is derived from the servo surface, which has a quadature type servo signal prerecorded thereon. A circuit means modifies the derived position signal so that a substantially linear signal representing the displacement of the servo head from the servo track is obtained. A second position signal having a low frequency component is obtained from servo sector information registered on the data disk surface and together with the first position signal forms a hybrid position signal. This hybrid signal is used to control the movement of the data heads relative to the data tracks to ensure optimum transducing operation.
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公开(公告)号：ZA76616B
公开(公告)日：1977-09-28
申请号：ZA76616
申请日：1976-02-03
Applicant: IBM
Inventor： CASE W , COMMANDER R
Abstract: Data track positioning information for data tracks on a stack of recording disks is provided by servo information pre-recorded on one surface of the stack. In addition, each data track on the remaining surfaces of the stack has servo information relative to that track pre-recorded in sectors around the track. Track following operations are controlled in a closed loop servo system using on-track position information derived from the sectored servo tracks associated with the track being followed. The bandwidth of the position error signal derived from the sectored servo information is increased by adding high frequency components obtained from the continuous servo information on the servo surface. Track access operations are controlled using track crossing information derived from the pre-recorded servo information on the servo surface.
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公开(公告)号：ZA7600616B
公开(公告)日：1977-09-28
申请号：ZA7600616
申请日：1976-02-03
Applicant: IBM
Inventor： CASE W , COMMANDER R
CPC classification number: G11B5/59655
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公开(公告)号：BR7603098A
公开(公告)日：1977-01-25
申请号：BR7603098
申请日：1976-05-17
Applicant: IBM
Inventor： COMMANDER R , TAYLOR J
Abstract: A positioning system for data storage apparatus in which a magnetic transducer is positioned relative to data tracks on a moving record member by means of a closed loop servo system. Improved velocity control information is provided to the servo system by pre-recorded servo tracks read by a single servo head forming part of the closed loop system. Each servo track consists of a plurality of servo cells, alternate ones of which are laterally displaced by half a track width. A position reference signal is prerecorded in each cell at a point which is predetermined to permit the signal to be sensed by the single servo head independently of any other detectable signal. Accordingly, a position error signal derived from displaced cells is always 90 DEG out of phase with the position error signal derived from undisplaced cells. During a track access operation, when the servo head is moved from one track to another track, the displaced and undisplaced cells are sensed by the single servo head to provide two separate position error signals. Control circuits combine selected portions of the two position error signals to provide a composite signal of improved linearity from which the velocity of the head during the access operation can be ascertained directly and employed to perform control functions dependent on velocity.
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公开(公告)号：CA925957A
公开(公告)日：1973-05-08
申请号：CA73741
申请日：1970-02-03
Applicant: IBM
Inventor： COMMANDER R
IPC: G11B15/087 , G11B20/12 , G11B20/14 , G11B27/10
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