Patents by Inventor Kenichi Takayama
Kenichi Takayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10579044Abstract: A non-transitory computer readable information recording medium stores an evaluation program for operating first and second motor control units, for evaluating operation characteristics related to a control device including a first motor control unit configured to control a first motor driving a first axis, and a second motor control unit configured to control a second motor driving a second axis. The evaluation program operates the first and second motor control units so that a shape of a movement path of a control target moved by the first and second axes includes at least a cornered shape in which both rotation directions of the first and second motors do not invert, and an arc shape in which one of the first and second motors rotates in one direction, and a rotation direction of the other of the first and second motors inverts.Type: GrantFiled: June 12, 2018Date of Patent: March 3, 2020Assignee: FANUC CORPORATIONInventors: Satoshi Ikai, Kenichi Takayama
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Patent number: 10247301Abstract: A servo control system including a servo motor, a driven member driven, a coupling mechanism coupled with the servo motor and the driven member, and a motor control part controlling the servo motor. The motor control part includes a position command generating part generating a position command value of the driven member, a force estimating part estimating the drive force acting on the driven member, a compensating part compensating the position command value based on the drive force estimated by the force estimating part, and a control signal output part outputting a control signal to the servo motor based on a position command value compensated by the compensating part.Type: GrantFiled: November 29, 2013Date of Patent: April 2, 2019Assignee: FANUC CORPORATIONInventors: Yasusuke Iwashita, Kenichi Takayama, Satoshi Ikai
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Publication number: 20180364678Abstract: A non-transitory computer readable information recording medium stores an evaluation program for operating first and second motor control units, for evaluating operation characteristics related to a control device including a first motor control unit configured to control a first motor driving a first axis, and a second motor control unit configured to control a second motor driving a second axis. The evaluation program operates the first and second motor control units so that a shape of a movement path of a control target moved by the first and second axes includes at least a cornered shape in which both rotation directions of the first and second motors do not invert, and an arc shape in which one of the first and second motors rotates in one direction, and a rotation direction of the other of the first and second motors inverts.Type: ApplicationFiled: June 12, 2018Publication date: December 20, 2018Inventors: Satoshi IKAI, Kenichi TAKAYAMA
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Patent number: 10133249Abstract: A servomotor controller includes a first and a second converter circuit that perform conversion between AC power of a power supply and DC power, a first inverter circuit that performs conversion between the DC power on the DC side of the first converter circuit and AC power on the side of a first motor, a second inverter circuit that performs conversion between the DC power on the DC side of the second converter circuit and AC power on the side of a second motor, and a power calculation unit that calculates an amount of power of the first motor, wherein control is performed so that the regenerative power of the first motor is supplied to the second motor through the power supply or the regenerative power of the second motor is supplied to the first motor through the power supply, on the basis of the amount of power.Type: GrantFiled: January 17, 2017Date of Patent: November 20, 2018Assignee: FANUC CORPORATIONInventors: Satoshi Ikai, Kenichi Takayama
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Patent number: 10095212Abstract: A motor control apparatus controlling a motor driving a machine tool includes, an abnormal load detecting unit that detects an abnormal load by monitoring a load of the motor, a retract amount storing unit that stores a plurality of retract amounts used when the machine tool performs a retract operation in response to detection of an abnormal load by the abnormal load detecting unit, a retract amount switching unit that switches a retract amount selected from the plurality of retract amounts in accordance with a result of determination of whether the machine tool is processing or not, and a retract amount adding unit that adds a retract amount selected by switching of the retract amount switching unit to an instruction value indicative of a movement amount of the machine tool.Type: GrantFiled: April 27, 2017Date of Patent: October 9, 2018Assignee: FANUC CORPORATIONInventors: Kenichi Takayama, Zhiwei Tang
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Patent number: 9887865Abstract: A numerical control device wherein a sinusoidal signal generated by a sine wave generation part is input by a control loop excitation part to a control loop of the control object, the input signal input to the control loop and the output signal from the control object are sampled by the data acquisition part periodically, and the sampling data is used by the frequency characteristic calculation part to calculate the frequency characteristic of the control loop to control the control object, wherein the frequency characteristic calculation part uses data obtained by inputting a sinusoidal signal obtained by shifting an initial phase of the sinusoidal signal by a phase shift part provided at a sine wave generation part by exactly a certain amount to the control loop a plurality of times to calculate the frequency characteristic of the control loop to thereby improve the measurement precision regardless of the sampling frequency.Type: GrantFiled: February 20, 2015Date of Patent: February 6, 2018Assignee: FANUC CORPORATIONInventors: Junichi Tezuka, Kenichi Takayama, Hajime Ogawa
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Publication number: 20170288596Abstract: A control device for a motor is provided that can determine the states of current controllers controlling the current flowing to windings, as well as reducing the load of arithmetic processing. A control device for a motor having windings includes: a main current controller that is connected with a numerical control and controls current flowing to the winding; and sub-current controllers that are connected with the main current controller and control current flowing to the windings, respectively, in which the main current controller: calculates states of the main current controller and the sub-current controllers, compares between the states of the main current controller and the sub-current controllers thus calculated, and determines whether an abnormality is occurring in the main current controller and the sub-current controllers based on a result of comparing between the states of the main current controller and the sub-current controllers.Type: ApplicationFiled: March 21, 2017Publication date: October 5, 2017Inventors: Satoshi IKAI, Kenichi TAKAYAMA
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Publication number: 20170235287Abstract: A motor control apparatus controlling a motor driving a machine tool includes, an abnormal load detecting unit that detects an abnormal load by monitoring a load of the motor, a retract amount storing unit that stores a plurality of retract amounts used when the machine tool performs a retract operation in response to detection of an abnormal load by the abnormal load detecting unit, a retract amount switching unit that switches a retract amount selected from the plurality of retract amounts in accordance with a result of determination of whether the machine tool is processing or not, and a retract amount adding unit that adds a retract amount selected by switching of the retract amount switching unit to an instruction value indicative of a movement amount of the machine tool.Type: ApplicationFiled: April 27, 2017Publication date: August 17, 2017Applicant: FANUC CORPORATIONInventors: Kenichi Takayama, Zhiwei Tang
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Publication number: 20170205786Abstract: A servomotor controller includes a first and a second converter circuit that perform conversion between AC power of a power supply and DC power, a first inverter circuit that performs conversion between the DC power on the DC side of the first converter circuit and AC power on the side of a first motor, a second inverter circuit that performs conversion between the DC power on the DC side of the second converter circuit and AC power on the side of a second motor, and a power calculation unit that calculates an amount of power of the first motor, wherein control is performed so that the regenerative power of the first motor is supplied to the second motor through the power supply or the regenerative power of the second motor is supplied to the first motor through the power supply, on the basis of the amount of power.Type: ApplicationFiled: January 17, 2017Publication date: July 20, 2017Inventors: Satoshi IKAI, Kenichi TAKAYAMA
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Patent number: 9673745Abstract: A servomotor control system of the present invention includes: a multiple number of first servomotors for driving axes in a machine tool or others; a multiple number of converters for converting AC voltage into DC voltage; a multiple number of first inverters for converting DC voltage into AC voltage; second servomotors for rotating inertial bodies; a multiple number of second inverters for converting DC voltage into AC voltage; and a servomotor control unit for controlling the multiple first servomotors and the second servomotors, and is constructed such that the number of the second servomotors is less than that of the multiple second inverters, and at least one of the second servomotors includes a multiple number of independent windings, and at least part of the multiple second inverters are connected to the multiple independent windings provided for one of the second servomotors.Type: GrantFiled: August 18, 2015Date of Patent: June 6, 2017Assignee: FANUC CORPORATIONInventors: Kenichi Takayama, Satoshi Ikai
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Patent number: 9522978Abstract: To provide a safe and stable medicine useful for prevention and treatment of prostate cancer. A novel PI polyamide is acquired that recognizes and binds to a specific base sequence of an Oct1 gene binding sequence present in a transcriptional regulatory region (AR response region) of an ACSL3 gene and regulating the transcription activity of AR. This leads to the provision of an ACSL3 gene expression inhibitor and a preventive and/or therapeutic agent of prostate cancer containing the PI polyamide as an active ingredient.Type: GrantFiled: March 11, 2014Date of Patent: December 20, 2016Assignee: NIHON UNIVERSITYInventors: Daisuke Obinata, Satoru Takahashi, Kyoko Fujiwara, Satoshi Inoue, Kenichi Takayama
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Patent number: 9448545Abstract: A servo control device in the present invention corrects a position command to a feed axis, so as to compensate for an amount of stretch or contraction of a ball screw during operation, by taking into account an influence of tension applied to the ball screw. The amount of stretch or contraction of the ball screw is calculated, based on the tension acting on the ball screw on the side farther from the servo motor, a distance between two fixed units supporting the ball screw at its opposite ends, a distance from the fixed unit situated closer to the servo motor to a moving body, and a torque command to the servo motor. An amount of position correction of the feed axis is calculated, based on the calculated amount of stretch or contraction of the ball screw.Type: GrantFiled: October 29, 2013Date of Patent: September 20, 2016Assignee: FANUC CORPORATIONInventors: Yasusuke Iwashita, Kenichi Takayama, Satoshi Ikai
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Publication number: 20160056749Abstract: A servomotor control system of the present invention includes: a multiple number of first servomotors for driving axes in a machine tool or others; a multiple number of converters for converting AC voltage into DC voltage; a multiple number of first inverters for converting DC voltage into AC voltage; second servomotors for rotating inertial bodies; a multiple number of second inverters for converting DC voltage into AC voltage; and a servomotor control unit for controlling the multiple first servomotors and the second servomotors, and is constructed such that the number of the second servomotors is less than that of the multiple second inverters, and at least one of the second servomotors includes a multiple number of independent windings, and at least part of the multiple second inverters are connected to the multiple independent windings provided for one of the second servomotors.Type: ApplicationFiled: August 18, 2015Publication date: February 25, 2016Inventors: Kenichi Takayama, Satoshi Ikai
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Publication number: 20160032057Abstract: To provide a safe and stable medicine useful for prevention and treatment of prostate cancer. A novel PI polyamide is acquired that recognizes and binds to a specific base sequence of an Oct1 gene binding sequence present in a transcriptional regulatory region (AR response region) of an ACSL3 gene and regulating the transcription activity of AR. This leads to the provision of an ACSL3 gene expression inhibitor and a preventive and/or therapeutic agent of prostate cancer containing the PI polyamide as an active ingredient.Type: ApplicationFiled: March 11, 2014Publication date: February 4, 2016Applicant: NIHON UNIVERSITYInventors: Daisuke OBINATA, Satoru TAKAHASHI, Kyoko FUJIWARA, Satoshi INOUE, Kenichi TAKAYAMA
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Publication number: 20150266152Abstract: A motor control apparatus controlling a motor driving a machine tool includes, an abnormal load detecting unit that detects an abnormal load by monitoring a load of the motor, a retract amount storing unit that stores a plurality of retract amounts used when the machine tool performs a retract operation in response to detection of an abnormal load by the abnormal load detecting unit, a retract amount switching unit that switches a retract amount selected from the plurality of retract amounts in accordance with a result of determination of whether the machine tool is processing or not, and a retract amount adding unit that adds a retract amount selected by switching of the retract amount switching unit to an instruction value indicative of a movement amount of the machine tool.Type: ApplicationFiled: March 18, 2015Publication date: September 24, 2015Inventors: Kenichi Takayama, Zhiwei Tang
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Publication number: 20150241869Abstract: A numerical control device wherein a sinusoidal signal generated by a sine wave generation part is input by a control loop excitation part to a control loop of the control object, the input signal input to the control loop and the output signal from the control object are sampled by the data acquisition part periodically, and the sampling data is used by the frequency characteristic calculation part to calculate the frequency characteristic of the control loop to control the control object, wherein the frequency characteristic calculation part uses data obtained by inputting a sinusoidal signal obtained by shifting an initial phase of the sinusoidal signal by a phase shift part provided at a sine wave generation part by exactly a certain amount to the control loop a plurality of times to calculate the frequency characteristic of the control loop to thereby improve the measurement precision regardless of the sampling frequency.Type: ApplicationFiled: February 20, 2015Publication date: August 27, 2015Inventors: Junichi TEZUKA, Kenichi TAKAYAMA, Hajime OGAWA
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Patent number: 9018886Abstract: A motor control system (10) which includes a difference calculating part (31) which calculates a difference between a first position detection value of a moving part and a second position detection value of a driven part, a judging part (32) which judges if a moving part has engaged with the driven part when the moving part is made to move from any initial position in a first and second drive directions, a holding part (33) which holds the difference as initial difference linked with the first or second drive direction, when the moving part has engaged with the driven part, and a correction amount calculating part (34) which calculates a backlash correction amount, the correction amount calculating part using the difference based on the current positions of the moving part and the driven part and the initial difference to calculate the backlash correction amount.Type: GrantFiled: September 4, 2013Date of Patent: April 28, 2015Assignee: Fanuc CorporationInventors: Yasusuke Iwashita, Kenichi Takayama, Satoshi Ikai
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Patent number: 8896255Abstract: A servo controller, capable of controlling the motion of a movable body with high accuracy, without depending on the position of the movable body which is moved on a ball screw. The servo controller has a position command generating part which generates a position command value; a velocity command generating part which generates a velocity command value based on the position command value and a position detection value; a torque command generating part which generates a torque command value based on the velocity command value and a velocity detection value; and a position compensation calculating part which calculates an amount of expansion/contraction of the ball screw based on a distance from the servomotor to a nut threadably engaged with the ball screw and the torque command value, and calculates a position compensation based on the amount of expansion/contraction.Type: GrantFiled: June 3, 2013Date of Patent: November 25, 2014Assignee: Fanuc CorporationInventors: Yasusuke Iwashita, Kenichi Takayama, Satoshi Ikai
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Patent number: 8853182Abstract: An object is to provide a cell growth inhibitor also effective for androgen-independent prostate cancer. The present invention provides a cell growth inhibitor having, as an active ingredient, an expression inhibitor or function inhibitor of PSF.Type: GrantFiled: January 9, 2013Date of Patent: October 7, 2014Assignee: The University of TokyoInventors: Satoshi Inoue, Kenichi Takayama
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Patent number: 8796240Abstract: An object is to provide a cell growth inhibitor also effective for androgen-independent prostate cancer. The present invention provides a cell growth inhibitor having, as an active ingredient, an expression inhibitor or function inhibitor of an antisense RNA (CTBP1-AS) expressed in the vicinity of an androgen receptor (AR) binding site of a C-terminal binding protein (CTBP1) gene.Type: GrantFiled: March 25, 2011Date of Patent: August 5, 2014Assignee: The University of TokyoInventors: Satoshi Inoue, Kenichi Takayama