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    Spark igniter life detection
    2.
    发明授权
    Spark igniter life detection 有权

    公开(公告)号：US11798324B2

    公开(公告)日：2023-10-24

    申请号：US16721601

    申请日：2019-12-19

    Applicant: Champion Aerospace LLC

    Inventor： Robert A. Lockmiller ,  Amit Toprani

    IPC: G07C5/08 ,  F02C7/26 ,  F02P17/12 ,  H01T13/60 ,  F02P15/00

    CPC classification number: G07C5/0808 ,  F02C7/26 ,  F02P15/003 ,  F02P17/12 ,  H01T13/60 ,  F05D2220/32 ,  F05D2260/83

    Abstract: A device for monitoring a life condition of a spark igniter in a gas turbine ignition system. The device includes an evaluation circuit having circuit components that include a hold capacitor, a transistor, and an operational amplifier arranged to form a sample-and-hold circuit, wherein an igniter spark impulse signal is applied to an input node of the evaluation circuit causing the transistor to turn on and the hold capacitor to discharge for a duration of the igniter spark impulse signal, and wherein a discharged voltage at the hold capacitor is maintained and output by the operational amplifier, the discharged voltage representing the duration of the igniter spark impulse and indicating the life condition of the spark igniter.

    FAST ENGINE RE-START FOR MULTI-ENGINE SYSTEM AND METHOD
    4.
    发明申请
    FAST ENGINE RE-START FOR MULTI-ENGINE SYSTEM AND METHOD 有权

    公开(公告)号：US20230036374A1

    公开(公告)日：2023-02-02

    申请号：US17388308

    申请日：2021-07-29

    Applicant: PRATT & WHITNEY CANADA CORP.

    Inventor： Daniel COUTU ,  Philippe BEAUCHESNE-MARTEL

    IPC: F02C7/26 ,  B64D31/00 ,  F02C6/20 ,  F02C9/18

    Abstract: A method of operating a multi-engine system of an aircraft having first and second engines includes accumulating compressed air in a pressure vessel external to the engines, and operating the first and second engines asymmetrically, by controlling the first engine to operate in an active operating condition providing sufficient power and/or rotor speed for demands of the aircraft, and controlling the second engine to operate in a standby operating condition wherein the second engine produces less power output than the first engine. In response to a power demand request, the second engine is accelerated out of the standby operating condition by introducing therein compressed air from the pressure vessel at a location upstream of a combustor of the second engine.

    Electrical controller for engine-driven electric machine
    6.
    发明授权
    Electrical controller for engine-driven electric machine 有权

    公开(公告)号：US11319880B2

    公开(公告)日：2022-05-03

    申请号：US16171847

    申请日：2018-10-26

    Applicant: Rolls-Royce North American Technologies, Inc.

    Inventor： David Russell Trawick

    IPC: F02C7/26 ,  F02C9/56 ,  G01M15/14

    Abstract: The disclosure describes a system that includes an engine having a shaft that rotates around an axis of rotation, an engine controller configured to control the engine, an electric machine mechanically coupled to the shaft of the engine, and an electrical controller. The engine controller is configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation. The electric machine has an actual moment of inertia around the axis of rotation that is different from the target moment of inertia. To supplement control of the engine due to the difference in moments of inertia, the electrical controller is configured to receive a rotational speed of the shaft, determine a torque for the shaft based on the speed of the shaft, and control the electric machine to apply the torque to the shaft.

    Methods and apparatus for controlling at least part of a start-up or re-light process of a gas turbine engine
    7.
    发明授权
    Methods and apparatus for controlling at least part of a start-up or re-light process of a gas turbine engine 有权

    公开(公告)号：US11149647B2

    公开(公告)日：2021-10-19

    申请号：US16679568

    申请日：2019-11-11

    Applicant: ROLLS-ROYCE plc

    Inventor： Stephen M. Husband ,  Ahmed M Y Razak ,  Paul R. Miller

    IPC: F02C7/26 ,  F02C3/06 ,  F02C9/22 ,  F04D27/00

    Abstract: A method of controlling at least part of a start-up or re-light process of a gas turbine engine, the method comprising: increasing an angular velocity of a low pressure compressor; determining if an exit pressure of the low pressure compressor is equal to or greater than a first threshold pressure; in response to determining that the exit pressure of the low pressure compressor is equal to or greater than the first threshold pressure, controlling rotation of the low pressure compressor using a first electrical machine and controlling rotation of a high pressure compressor using a second electrical machine, to increase angular velocity of the high pressure compressor; determining if an exit pressure of the high pressure compressor is equal to or greater than a second threshold pressure.

    Method and system for setting an acceleration schedule for engine start
    8.
    发明授权
    Method and system for setting an acceleration schedule for engine start 有权

    公开(公告)号：US11131211B2

    公开(公告)日：2021-09-28

    申请号：US16433280

    申请日：2019-06-06

    Applicant: PRATT & WHITNEY CANADA CORP.

    Inventor： Sylvain Lamarre ,  Pierre Alexandre

    IPC: F01D19/00 ,  F02C7/26 ,  F02C9/28 ,  B64D27/16

    Abstract: Herein provided are methods and systems for setting an acceleration schedule for engine start of a gas turbine engine. A rotational acceleration measurement of the engine is obtained after the engine is energized in response to a start request. The rotational acceleration measurement of the engine is compared to a threshold value within an acceleration band having a maximum threshold and a minimum threshold. An acceleration schedule is determined based on a position of the rotational acceleration measurement of the engine in the acceleration band relative to the threshold value.

    Compact aero-thermo model based engine power control
    10.
    发明授权
    Compact aero-thermo model based engine power control 有权

    公开(公告)号：US11078849B2

    公开(公告)日：2021-08-03

    申请号：US17017815

    申请日：2020-09-11

    Applicant: Raytheon Technologies Corporation

    Inventor： Boris Karpman ,  Richard P. Meisner ,  Matthew Donald ,  Thomas E. Case

    IPC: F02C7/26 ,  G05B17/02 ,  F02C9/20 ,  G05D7/06 ,  F01D21/00 ,  F02C9/16 ,  F02C3/04 ,  F04D29/32 ,  G05B13/04 ,  G05B23/02

    Abstract: Systems and methods for controlling a fluid-based system are disclosed. The systems and methods may include generating a model output using a model processor, processing a model input vector and setting a model operating mode, and setting dynamic states of the model processor, the dynamic states input to an open loop model based on the model operating mode. Synthesized parameters are generated as a function of the dynamic states and the model input vector based on a series of utilities, where at least one of the utilities is a configurable utility including one or more sub-utilities. An estimated state of the model is determined based on at least one of a prior state and the synthesized parameters. An actuator associated with the control device is directed as a function of a model output, where the model output includes an estimated thrust value for the control device.

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