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15 records (took 0.023 seconds)

    1.
    发明专利
    未知

    公开(公告)号：BR9001707A

    公开(公告)日：1991-05-21

    申请号：BR9001707

    申请日：1990-04-10

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SCHNEIDER ROY W

    IPC: B64D31/06 ,  B64C11/30 ,  F02C9/58 ,  B64C19/02

    Abstract: A propeller overspeed governor logic and control is described in this invention. A method is shown for providing a variable propeller pitch rate from a discrete pitch command to improve governing dynamic characteristics.

    2.
    发明专利
    未知

    公开(公告)号：BR9001705A

    公开(公告)日：1991-05-21

    申请号：BR9001705

    申请日：1990-04-10

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SCHNEIDER ROY W

    IPC: B64C11/50 ,  H02P5/52

    Abstract: A method and apparatus for providing improved phase error measurement as shown and described. The measured phase error is used as an input to a SYNCHROPHASER TM which provides for sphase control of a slave propeller with respect to a master. The phase error ( phi E) is the sum of the sensed phase error and 360 DEG divided by Np times phi COUNT minus phi REF. phi COUNT is a counted number of phase discontinuities which occur in phi S, the sensed phase. The values of phi COUNT and phi E, measured phase output, may be limited in number and magnitude.

    METHOD FOR SYNCHROPHASER MEASUREMENT AND SYNCHROPHASER CONTROL
    3.
    发明专利
    METHOD FOR SYNCHROPHASER MEASUREMENT AND SYNCHROPHASER CONTROL 未知

    公开(公告)号：CA2013946A1

    公开(公告)日：1990-10-11

    申请号：CA2013946

    申请日：1990-04-05

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SCHNEIDER ROY W

    IPC: B64C11/50 ,  H02P5/52 ,  G01R25/00

    Abstract: A method and apparatus for providing improved phase error measurement as shown and described. The measured phase error (?E) is used as an input to a SYNCHROPHASER? which provides for phase control of a slave propeller with respect to a master. The phase error (?E) is the sum of the sensed phase error and 360.degree. divided by Np times ?COUNT minus ?REF. ?COUNT is a counted number of phase discontinuities which occur in ?S, the sensed phase. The values of ?COUNT and ?E, measured phase output, may be limited in number and magnitude.

    4.
    发明专利
    未知

    公开(公告)号：BR9001709A

    公开(公告)日：1991-05-21

    申请号：BR9001709

    申请日：1990-04-10

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SCHNEIDER ROY W

    IPC: B64D31/06 ,  B64C11/30 ,  F02C9/58 ,  B64C19/02

    Abstract: A flight-mode propeller overspeed governor and underspeed governor is shown and described. The description includes a reset of the overspeed governor during engine acceleration and a reset of the underspeed governor during engine deceleration to eliminate sluggish transient response in the engine.

    INTEGRAL CONTROL OF A DEPENDENT VARIABLE IN A SYSTEM HAVING AT LEAST TWO INDEPENDENT VARIABLES WHICH INFLUENCE THE DEPENDENT VARIABLE
    9.
    发明专利
    INTEGRAL CONTROL OF A DEPENDENT VARIABLE IN A SYSTEM HAVING AT LEAST TWO INDEPENDENT VARIABLES WHICH INFLUENCE THE DEPENDENT VARIABLE 未知

    公开(公告)号：CA1242514A

    公开(公告)日：1988-09-27

    申请号：CA518661

    申请日：1986-09-19

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： SCHNEIDER ROY W ,  HARRIS MARK L

    IPC: G05B11/32 ,  G05B11/42

    Abstract: INTEGRAL CONTROL OF A DEPENDENT VARIABLE IN A SYSTEM HAVING AT LEAST TWO INDEPENDENT VARIABLES WHICH INFLUENCE THE DEPENDENT VARIABLE A method and apparatus for integral control of a dependent variable in a system having at least two independent variables which influence the dependent variable is disclosed. A difference signal indicative of the difference between the sensed dependent variable and a reference is integrated and provided to a hysteresis transfer function. The output of the transfer function is subtracted from the integrated difference signal and the resulting signal is used to control an independent variable which thereby influences the dependent variable only for small magnitude signal variations in the integrated signal. The integrated signal is used to control another independent variable for large magnitude signal variations in the integrated signal. The other independent variable is typically only capable of influencing the dependent variable for large magnitude signal variations.

    PROPELLER SYNCHROPHASER AND MODE LOGIC
    10.
    发明专利
    PROPELLER SYNCHROPHASER AND MODE LOGIC 未知

    公开(公告)号：CA1242511A

    公开(公告)日：1988-09-27

    申请号：CA517027

    申请日：1986-08-28

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： NIESSEN FRANK R ,  SCHNEIDER ROY W

    IPC: B64C11/50 ,  H02P5/52 ,  G05D13/62

    Abstract: PROPELLER SYNCHROPHASER AND MODE LOGIC An improved slave propeller synchrophaser and mode logic for a multi-propeller aircraft is disclosed. A designated master propeller has at least one associated slave propeller which has its speed and phase controlled with respect to the master by initially controlling the speed of -the slave propeller to within a selected constant number of RPM of the master so that the master and slave propellers are periodically in phase and then switching to phase control for controlling the speed of the slave propeller in the presence of a phase difference signal having an absolute magnitude less than a selected absolute magnitude. A selected phase difference relationship between the master and the slave may thus be effected with minimum transient effect on the speed of the slave propeller.

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