-
公开(公告)号：US20190288596A1
公开(公告)日：2019-09-19
申请号：US16112580
申请日：2018-08-24
发明人： Shigen YASUNAKA , Shinji TAKAKURA
IPC分类号： H02M1/32 , H02M7/5387 , H02P27/06 , G01R31/42
摘要： According to an embodiment, an inspection apparatus inspects an inverter circuit including three pairs of arms. The apparatus includes a current controller and a control signal generator. The current controller generates a control output for controlling a current to be output by the inverter circuit. The control output enables the current to approach a target value of the current. The control signal generator generates a first control signal for controlling ON/OFF of a first arm as one of the three pairs of arms based on the control output, a second control signal for fixing a second arm paired with the first arm, in an OFF-state, and a third control signal for fixing at least part of arms other than the first arm and the second arm in an ON-state.
-
公开(公告)号：US20210206184A1
公开(公告)日：2021-07-08
申请号：US17004219
申请日：2020-08-27
摘要： A tension detection device according to an embodiment includes a base, a support member, a continuous body, an external force detection unit, and a tension detection unit. One end or both ends of the support member are fixed to the base. The support member has an external force measurement section integrally provided at the one end or both ends thereof. The continuous body is conveyed while wound around an outer circumference of the support member. The external force detection unit is provided at the external force measurement section of the support member. The external force detection unit detects an external force. The tension detection unit detects tension of the continuous body based on a detection result from the external force detection unit.
-
公开(公告)号：US20240257832A1
公开(公告)日：2024-08-01
申请号：US18456496
申请日：2023-08-27
CPC分类号： G11B5/4833 , G11B5/56
摘要： According to an embodiment, a magnetic disk device includes: a magnetic disk; an arm; a support member provided at a distal end of the arm; a magnetic head provided on the support member and configured to access the magnetic disk; a first actuator configured to rotate the arm; a second actuator configured to drive the support member; and one or more processors configured to implement a controller configured to perform seek control of the magnetic head. The controller includes: a feedback controller configured to control a first command value for driving the first actuator so as to reduce an error between a position of the magnetic head and a target position; and an iterative learning controller configured to receive an input value based on the error and output a second command value for driving the second actuator by iterative learning.
-
公开(公告)号：US20240248437A1
公开(公告)日：2024-07-25
申请号：US18454205
申请日：2023-08-23
CPC分类号： G05B13/0265 , G05B23/0248 , G05B2223/02
摘要： A learning control device according to one embodiment includes a memory and a hardware processor. The memory stores a correction value to be used in a learning trial. The processor generates a feedback signal on the basis of a tracking error for a target state of a control target. The feedback signal is used for causing an operation result state of the control target to track the target state. The feedback signal is generated such that a control target waveform of transition of an output signal representing the operation result state becomes a waveform obtained by calculating a coefficient on the whole of a base control target waveform. The processor outputs, to a feedback communication path, a calculation result obtained by calculating the coefficient on the correction value. The processor updates the correction value stored in the memory in accordance with a signal communicated through the feedback communication path.
-
公开(公告)号：US20230195844A1
公开(公告)日：2023-06-22
申请号：US17897409
申请日：2022-08-29
CPC分类号： G06K9/6262 , G06F17/15
摘要： A learning control device according to one embodiment includes one or more hardware processors. The hardware processors function as an update unit, a calculation unit, and a correction unit. The update unit serves to update a modified control input in accordance with a tracking error. The modified control input is used during a learning trial. The calculation unit serves to calculate a lag in a learning control start time in accordance with a state of a control target at a start of the learning control. The learning control start time is a time at which learning control starts. The correction unit serves to correct the modified control input having been updated by the update unit. The modified control input is corrected by using the lag to have a value obtained by offsetting the lag.
-
公开(公告)号：US20180076751A1
公开(公告)日：2018-03-15
申请号：US15445005
申请日：2017-02-28
发明人： Shigen YASUNAKA , Shinji TAKAKURA
CPC分类号： H02P23/14 , H02P6/14 , H02P23/0027 , H02P27/08
摘要： According to one embodiment, a control apparatus identifies a load characteristic of a circuit by an impulse response. In the control apparatus, a controller provides a control signal. A first generator generates first gate signals based on the control signal. A second generator generates second gate signals to identify the load characteristic of the circuit. A switching part switches connection to one of the first generator and the second generator. A bridge circuit connected to the switching part includes a plurality of switching elements. When the switching part is connected to the first generator, the switching elements are operated based on the first gate signals, and the bridge circuit outputs a first signal. When the switching part is connected to the second generator, the switching elements are operated based on the second gate signals, and the bridge circuit outputs an impulse second signal different from the first signal.
-
7.发明申请公开(公告)号：US20160275977A1
公开(公告)日：2016-09-22
申请号：US15066343
申请日：2016-03-10
发明人： Shigen YASUNAKA , Shinji TAKAKURA
IPC分类号： G11B5/596
CPC分类号： G11B5/59655 , G11B5/59666 , G11B5/59672
摘要： According to one embodiment, a servo write control apparatus is for a disk apparatus including a read element and a write element located in an outer side of a disk from the read element. The servo write control apparatus detects a plurality of first burst signals recorded in a circumferential direction of the disk by the read element. The servo write control apparatus calculates an offset in a radial direction when the write element writes a second burst signal, based on amplitude values of at least two of the first burst signals used for positioning the read element. The servo write control apparatus adjusts a write position of the second burst signal based on the offset.
摘要翻译： 根据一个实施例，伺服写入控制装置用于包含读取元件和位于盘的外侧的读取元件的写入元件的盘装置。 伺服写入控制装置通过读取的元件检测在盘的圆周方向记录的多个第一突发信号。 伺服写入控制装置基于用于定位读取元件的第一突发信号中的至少两个的振幅值，在写入元件写入第二突发信号时计算径向偏移。 伺服写入控制装置基于偏移来调整第二突发信号的写入位置。
-
8.发明申请公开(公告)号：US20190028052A1
公开(公告)日：2019-01-24
申请号：US15916214
申请日：2018-03-08
发明人： Shigen YASUNAKA , Shinji TAKAKURA
IPC分类号： H02P29/024 , H02P21/22 , H02P21/18 , H02P27/08
摘要： An evaluation apparatus of an embodiment for evaluating an inverter circuit for an electric motor includes a three-phase-to-two-phase converter, a current controller, gate signals generator, and a storage. The three-phase-to-two-phase converter converts primary three-phase currents i1u, i1v, and i1w of the electric motor connected to the inverter circuit into a d-axis current i1d and a q-axis current i1q. The current controller generates d-axis and q-axis voltage command values v1d* and v1q* for adjusting the q-axis current i1q to a command value i1q* being substantially zero and the d-axis current i1d to a command value i1d* with feedback control of the electric motor through the inverter circuit. The gate signals generator generates gate signals gs based on the command values v1d* and v1q* and applies the gate signals gs to the inverter circuit. The storage stores the command value v1d*.
-
公开(公告)号：US20180100909A1
公开(公告)日：2018-04-12
申请号：US15693322
申请日：2017-08-31
发明人： Shinji TAKAKURA , Shigen YASUNAKA
IPC分类号： G01R33/565 , G01R33/56
CPC分类号： G01R33/56518 , G01R33/3852 , G01R33/5608 , G05B13/02 , H03F1/00
摘要： According to one embodiment, a correction device is used for an apparatus including a coil and a conductor in a vicinity of the coil. The correction device corrects an influence of a magnetic field generated by the conductor when a current flows through the coil. The correction device includes a first measuring device, a second measuring device, and a control device. The first measuring device measures a first signal of the coil. The second measuring device measures a second signal of the coil, which is different from the first signal. The control device estimates the influence acting on the coil, based on a difference between the first signal filtered by a first filter and the second signal filtered by a second filter. Furthermore, the control device controls a command signal for flowing the current to the coil, based on an estimation result of the influence.
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.015 秒)
