公开(公告)号：US20250076102A1

公开(公告)日：2025-03-06

申请号：US18248174

申请日：2021-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta SHIRAKI ,  Hiroshi FUJIWARA ,  Toru TAZAWA

IPC: G01H1/00

Abstract: An oscillation information calculation device includes: a sensor information obtainer that obtains time series position information on a motor as detected by a position detector, and time series sensor information on a movable part as detected by a sensor attached to the movable part, the movable part being connected to the motor via a joint; and an information calculator that calculates and outputs at least one of oscillation presence/absence information, oscillation frequency information, or oscillation causal information, based on the time series position information and the time series sensor information, the oscillation presence/absence information indicating presence or absence of oscillation of the motor and the movable part, the oscillation frequency information indicating an oscillation frequency of the motor and the movable part, the oscillation causal information indicating a cause of the oscillation of the motor and the movable part.

公开(公告)号：US20230366932A1

公开(公告)日：2023-11-16

申请号：US18248468

申请日：2021-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuhiro TANAKA ,  Hiroshi FUJIWARA

IPC: G01R31/34

CPC classification number: G01R31/34

Abstract: An anomaly determining device includes a sensor information acquirer and a determiner. The sensor information acquirer acquires sensor information output in time sequence from each of two sensors that detect different physical quantities of a moving part that is subjected to positioning control. The determiner determines, when the moving part is located within a predetermined range from a target position for positioning, the presence or absence of an anomaly in at least one of the two sensors in accordance with the acquired sensor information and outputting a result of the determination.

公开(公告)号：US20190146453A1

公开(公告)日：2019-05-16

申请号：US16228698

申请日：2018-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toru TAZAWA ,  Hiroshi FUJIWARA ,  Masaru NISHIZONO

IPC: G05B19/35 ,  H02P23/00 ,  G05B19/19

CPC classification number: G05B19/358 ,  G05B19/19 ,  G05B2219/34432 ,  G05B2219/37312 ,  G05B2219/42152 ,  H02P23/0004 ,  H02P2205/05 ,  H02P2205/07

Abstract: A method, according to the present invention, of adjusting control parameters used in a control apparatus of an electric motor includes the steps of: computing a first frequency characteristic (Step 1); computing a present speed-proportional gain range (Step 2); computing a present mechanical-system characteristic constant (Step 3); computing a present proportional gain range (Step 4); computing a secular characteristic (Step 5); computing a secular speed-proportional gain range (Step 6); computing a secular proportional gain range (Step 7); and selecting proportional gain values (Step 8).

公开(公告)号：US20230333137A1

公开(公告)日：2023-10-19

申请号：US18245670

申请日：2021-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Gimpei ITO ,  Hiroshi FUJIWARA

IPC: G01P21/00

CPC classification number: G01P21/00

Abstract: A characteristic calculation device includes a sensor information obtainer that obtains position information indicating a position of a motor as detected by a position detector, and acceleration information indicating an acceleration of a movable part connected to the motor as detected by an acceleration sensor attached to the movable part; and a sensor characteristic calculator that calculates and outputs at least one of balance information or detection sensitivity information, based on the position information and the acceleration information, the balance information indicating a degree of matching between a direction of an axis of detection by the acceleration sensor and a direction of acceleration to be detected by the acceleration sensor, the detection sensitivity information indicating a detection sensitivity of the acceleration sensor.

公开(公告)号：US20200083834A1

公开(公告)日：2020-03-12

申请号：US16613762

申请日：2018-05-18

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hiroshi FUJIWARA ,  Toru TAZAWA ,  Fumitake SAEGUSA

IPC: H02P23/04 ,  H02P29/40

Abstract: An electric motor control device performing feedback control of a state amount of an electric motor or a load and being capable of changing a control bandwidth of a feedback control system includes: a notch filter arranged in the feedback control system and having a filter coefficient which is changeable; a notch control section which changes a notch frequency as a center frequency of the notch filter to remove an oscillation component attributable to mechanical resonance related to the electric motor; and a control coefficient setting section which changes at least one of the control bandwidth or the filter coefficient of the notch filter in accordance with the control bandwidth and the notch frequency to stabilize the feedback control system.