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    Device for Controlling a System with Polynomial Dynamics
    2.
    发明公开
    Device for Controlling a System with Polynomial Dynamics 审中-公开

    公开(公告)号：US20240012366A1

    公开(公告)日：2024-01-11

    申请号：US17810709

    申请日：2022-07-05

    Applicant: Mitsubishi Electric Research Laboratories, Inc.

    Inventor： Arvind Raghunathan

    IPC: G05B6/02

    CPC classification number: G05B6/02

    Abstract: A device for controlling an operation of a system performing a task determines a current control input based on the feedback signal by solving a polynomial optimization of a polynomial function with a reformulation derived by introducing additional variables reducing the degree of the polynomial function till a target degree subject to constraints on a structure of the additional variables. The device solves a mixed-integer optimization problem to find a subset of encodings among all possible encodings of factorizations of the polynomial function that reduce the degree of the polynomial function to the target degree with a predetermined minimum number of additional variables and selects an optimal encoding from the subset of encodings with an optimal relaxation bound.

    Control device for plant and controlling method of the same
    3.
    发明授权
    Control device for plant and controlling method of the same 有权

    公开(公告)号：US11835929B2

    公开(公告)日：2023-12-05

    申请号：US17675195

    申请日：2022-02-18

    Applicant: Daegu Gyeongbuk Institute of Science and Technology

    Inventor： Sehoon Oh ,  Hanul Jung

    IPC: G05B13/04 ,  G05B6/02

    CPC classification number: G05B13/042 ,  G05B6/02

    Abstract: Disclosed is a control device of a plant. The control device of a plant according to an embodiment includes a communication device configured to communicate with a plant; a processor configured to, based on receiving a command input for the plant, generate a control input for the plant and provide the control input to the plant, and the processor may calculate a feedforward control input of the plant using the command input and prestored first parameter, calculate an error based on a difference value of the command input and output of the plant, calculate a feedback control input of the plant using the calculated error and prestored second parameter, calculate a estimated disturbance of the plant based on the control input of the plant, output of the plant, and the prestored first parameter, generate the control input of the plant based on control input of the feedforward, control input of the feedback, and the estimated disturbance, and simultaneously adjust the first parameter and the second parameter based on an initial output of the plant during initial driving of the plant.

    Parameter adjustment method for adjusting control parameters for device that performs servo control
    4.
    发明授权
    Parameter adjustment method for adjusting control parameters for device that performs servo control 有权

    公开(公告)号：US11809148B2

    公开(公告)日：2023-11-07

    申请号：US17614670

    申请日：2020-03-02

    Applicant: OMRON Corporation

    Inventor： Maki Nishimura ,  Mamoru Egi ,  Yasushi Ono ,  Kenji Nakajima ,  Fumiaki Sato

    IPC: G05B13/04 ,  G05B6/02

    CPC classification number: G05B13/042 ,  G05B6/02

    Abstract: A feedback gain and a speed feed-forward gain are adjusted. A method for adjusting control parameters for a control device that performs servo control on a control target includes calculating an upper limit of a feedback gain of a feedback signal within a range in which a predetermined index for the feedback gain satisfies a predetermined target value with a speed feed-forward gain for speed feed-forward control set at a predetermined reference value, setting the feedback gain at an adjustment initial value lower than the upper limit, setting the speed feed-forward gain at the highest value within a settable range, and increasing the feedback gain from the adjustment initial value within a range in which the feedback gain does not exceed the upper limit with at least the speed feed-forward gain set at a predetermined increased value.

    Voltage control loop for mitigating flicker in a grid-forming inverter-based resource
    7.
    发明授权
    Voltage control loop for mitigating flicker in a grid-forming inverter-based resource 有权

    公开(公告)号：US11689022B2

    公开(公告)日：2023-06-27

    申请号：US17380564

    申请日：2021-07-20

    Applicant: General Electric Renovables Espana, S.L.

    Inventor： Veena Padmarao ,  Arvind Kumar Tiwari ,  Subbarao Tatikonda ,  Kapil Jha ,  Shan Shine

    IPC: H02J3/24 ,  H02P21/24 ,  G05B6/02 ,  H02P9/10

    CPC classification number: H02J3/24 ,  G05B6/02 ,  H02P9/10 ,  H02P21/24

    Abstract: A method for mitigating voltage disturbances at a point of interconnection (POI) of a grid-forming inverter-based resource (IBR) due to flicker includes receiving a voltage reference command and a voltage feedback. The voltage feedback contains information indicative of the voltage disturbances at the POI due to the flicker. The method also includes determining a power reference signal for the IBR based on the voltage reference command and the voltage feedback. Moreover, the method includes generating a current vector reference signal based on the power reference signal, the current vector reference signal containing a frequency component of the voltage disturbances. Further, the method includes generating a transfer function of a regulator based on the frequency component to account for the flicker effect. In addition, the method includes generating a current vector based on a comparison of the current vector reference signal and a current vector feedback signal. Thus, the method includes regulating a voltage vector command using the current vector to mitigate the voltage disturbances.

    POWER-CONSUMPTION-AMOUNT ESTIMATION APPARATUS
    9.
    发明申请
    POWER-CONSUMPTION-AMOUNT ESTIMATION APPARATUS 审中-公开

    公开(公告)号：US20180299838A1

    公开(公告)日：2018-10-18

    申请号：US15526440

    申请日：2015-06-23

    Applicant: MITSUBISHI ELECTRIC CORPORATION

    Inventor： Koichiro UEDA ,  Takemasa ARAKAWA

    IPC: G05B6/02

    CPC classification number: G05B6/02 ,  G05B15/02 ,  H02P29/00

    Abstract: A power-consumption-amount estimation apparatus estimating a power consumption amount of an industrial machine including a motor, a machine driven by the motor, and an amplifier driving the motor, includes: an operation-pattern-information obtaining unit; a dynamics-information obtaining unit; a circuit-information obtaining unit obtaining amplifier information and motor information; and a power-consumption-amount calculation unit executing a process of calculating power of each of the motor and the regenerative resistor based on operation-pattern information, dynamics information, amplifier information, motor information, and a bus voltage simulated value and calculating power of the industrial machine based on the calculated power and execute a process of updating the bus voltage based on the calculated power of each of the motor and the regenerative resistor and the calculated power of the industrial machine, over a specified period, and calculating a power consumption amount of the industrial machine by integrating the calculated power of the industrial machine.

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