公开(公告)号：WO1993005459A1

公开(公告)日：1993-03-18

申请号：PCT/US1992006435

申请日：1992-07-31

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  GOLD, Phillip, J. ,  LAPPOS, Nicholas, D. ,  ADAMS, Don, L. ,  WRIGHT, Stuart, C.

IPC: G05D01/08

CPC classification number: G05D1/0858 ,  G05D1/085

Abstract: A helicopter flight control system includes an automatic turn coordination system which provides a coordinating yaw command signal to the tail rotor of the helicopter. The system stores on command a trim attitude (e.g., signals indicative of bank angle, lateral ground speed, and lateral acceleration) about which automatic turn coordination is provided, thus providing the pilot with automatic turn coordination about attitudes other than wings level.

公开(公告)号：WO1993005458A1

公开(公告)日：1993-03-18

申请号：PCT/US1992006427

申请日：1992-07-31

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  WRIGHT, Stuart, C. ,  ADAMS, Don, L. ,  GOLD, Phillip, J.

IPC: G05D01/08

CPC classification number: G05D1/0858 ,  B64C13/503 ,  G05D1/0061

Abstract: A helicopter flight control system includes a model following control system architecture which automatically provides a coordinating yaw command signal to the helicopter tail rotor to coordinate helicopter flight during a banked turn. The control system processes information from a variety of helicopter sensors in order to provide the coordinating yaw command signal on an output line to the tail rotor of the helicopter.

公开(公告)号：WO1993004917A1

公开(公告)日：1993-03-18

申请号：PCT/US1992007240

申请日：1992-08-26

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  BYRNES, Francis, E. ,  CULLEN, I., Lawrence, III

IPC: B64C27/48

CPC classification number: B64C27/48

Abstract: A composite torque tube (10) for a bearingless main rotor (BMR) assembly (100) that is optimally fabricated to meet torsional stiffness, fatigue strength, and buckling strength design constraints at minimal unit weight. The composite torque tube (10) includes a strengthened inboard section (12) for mechanically coupling the torque tube (10) in combination with the hub structure (120) of the BMR assembly, a strengthened outboard section (16) for mechanically coupling the torque tube (10) in combination with a corresponding main rotor blade, and an intermediate section (14) that is operative to accomodate the pitch, flapwise, and/or edgewise loads acting on the BMR assembly during operation thereof. The intermediate section (14) of the torque tube (10) has a constant wall thickness and is formed from continuous filament windings having a predetermined fiber orientation within a broad range of about +/- 18° to about +/- 40° and/or a narrow range of about +/- 26° to about +/- 35°. The torque tube (10) is preferably formed from continuous filament windings having an optimal fiber orientation of about +/- 35° to provide an intermediate section (14) having a minimal torque tube wall thickness.

公开(公告)号：WO1993003961A1

公开(公告)日：1993-03-04

申请号：PCT/US1992005898

申请日：1992-07-14

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  MOFFITT, Robert, C. ,  OWEN, Stephen, J.

IPC: B64C27/20

CPC classification number: B64C27/20

Abstract: An unmanned aerial vehicle (10) having a toroidal fuselage (20) that surrounds a pair of coaxial, multibladed, counter-rotating rotors (40). The toroidal fuselage (20) has an airfoil profile that is optimized to provide high hover efficiency and produce a pressure distribution that provide high lift forces. The airfoil profile is further optimized to counteract the undesirable nose-up pitching moments experienced by ducted rotary-type UAVs in forward translational flight.

公开(公告)号：WO1993003258A1

公开(公告)日：1993-02-18

申请号：PCT/US1992006306

申请日：1992-07-30

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  CARVALHO, Paul, A. ,  KUSIAK, Edward, H.

IPC: F01D07/00

CPC classification number: B64C11/325 ,  F01D7/00 ,  F05D2220/36 ,  F05D2260/74 ,  F05D2260/76 ,  Y02T50/66

Abstract: A pitch change system (30) for varying the pitch of the blades (16) of a multibladed propulsor (10) comprises a pitch change actuation assembly (40) and a pitch change drive assembly (70) for selectively actuating the pitch change actuation assembly (40) whenever it is desired to change blade pitch. The pitch change actuation assembly (40) comprises a ballscrew (42), a ballscrew nut (44) threadably mounted to the ballscrew (42), and a pitch stop assembly (100) having a retractable feather stop (135) which in its normal position prevents the ballscrew (42) from driving the ballscrew nut (44) to move the blades (16) beyond the coarse pitch setting corresponding to blade feather, but in its retracted position permits the ballscrew (42) to drive the ballscrew nut (44) to move the blades (16) through feather to a desired reverse pitch setting.

Abstract translation: 用于改变多叶片推进器（10）的叶片（16）的间距的桨距变化系统（30）包括桨距变化致动组件（40）和变桨驱动组件（70），用于选择性地致动俯仰变化 每当希望改变叶片间距时，致动组件（70）。 螺距改变致动组件（40）包括滚珠丝杠（42），螺纹安装到滚珠丝杠（42）的滚珠丝杠螺母（44）和具有可伸缩羽毛止动件（135）的俯仰停止组件（100） 位置防止滚珠丝杠（42）驱动滚珠丝杠螺母（44）以使叶片（16）移动超过对应于叶片羽毛的粗调俯仰设置，但是在其缩回位置允许滚珠丝杠（42）驱动滚珠丝杠螺母（44） ）将叶片（16）通过羽毛移动到期望的反向间距设定。

公开(公告)号：WO1993002405A1

公开(公告)日：1993-02-04

申请号：PCT/US1992005742

申请日：1992-07-09

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  ADAMS, Donald, L., Jr. ,  WRIGHT, Stuart, C. ,  VERZELLA, David, J. ,  LAMONTAGNE, Troy, J.

IPC: G05B13/02

CPC classification number: G05B5/01 ,  G05D1/0061 ,  Y10S424/819

Abstract: A control system, having an input command signal and driving a prime mover, is provided with variable magnitude and/or rate input signal limiting that is adjusted by maps (68, 70, 72, 74) which set the limits for a variable magnitude limiter (14) and a variable rate limiter (22) as a function of the prime mover rate. The limiting is adjusted dynamically as the prime mover rate changes. When the prime mover enters an undesirable operating condition, the maps only limit the command signal in the direction of such condition. The adjustable limiting is enabled or disabled based on the position, rate, and/or acceleration of the prime mover.

公开(公告)号：WO1992020961A1

公开(公告)日：1992-11-26

申请号：PCT/US1992003769

申请日：1992-05-06

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  SPADACCINI, Louis, J. ,  ROSFJORD, Thomas, J.

IPC: F23C06/04

CPC classification number: F02B51/02 ,  F02M27/02 ,  F23C6/04 ,  F23R3/30 ,  F23R3/40 ,  Y02T10/126

Abstract: A method of combusting an endothermic fuel (16) with staged rich/lean combustion includes transferring thermal energy from a heat source, such as the wall of a rich combustor, to an endothermic fuel decomposition catalyst (2) to cool the heat source and heat the fuel (16) and catalyst (2) to a temperature sufficient to endothermically decompose an endothermic fuel (16). The catalyst (2) is contacted with the fuel (16) to cause the fuel (16) to decompose into a reaction product stream (18). The reaction product stream (18) is mixed with a first air stream (20) to form a first fuel/air mixture having an equivalence ratio greater than 1 and the first fuel/air mixture is combusted in a rich combustion stage to produce a combustion product stream (24). The combustion product stream (24) is mixed with a second air stream (22) to form a second fuel/air mixture having an equivalence ratio less than 1 and the second fuel/air mixture is combusted in a lean combustion stage to produce an exhaust gas stream (26) containing decreased amounts of NOx. The invention also includes a system for practicing the method.

公开(公告)号：WO1992018324A1

公开(公告)日：1992-10-29

申请号：PCT/US1992003096

申请日：1992-04-15

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  DUBLINSKI, Alexander, Charles ,  FABIAN, Edward, Joseph ,  RAMEY, Philip, John ,  TONI, Darryl, Mark

IPC: B29C67/14

CPC classification number: B29D99/0014 ,  B29C33/307 ,  B29C39/405 ,  B29C43/12 ,  B29C70/30 ,  B29C70/446 ,  B29C70/541 ,  B29L2031/3076 ,  Y02T50/43 ,  Y10T156/1002 ,  Y10T156/1044 ,  Y10T428/24479 ,  Y10T428/24521 ,  Y10T428/24537 ,  Y10T428/24612 ,  Y10T428/24636 ,  Y10T428/24785 ,  Y10T428/24942 ,  Y10T428/2495

Abstract: A method of fabricating a structural member having a stiffener bead therein. Prepreg plies or layers of high tensile strength fabric are laid up on a conformable caul plate. A rubber-like plug is prefabricated to the shape of the stiffener bead and is urged into a stiffener bead cavity of the caul plate by a metal tool to sandwich the prepreg plies between the caul and the plug. The caul and the plug cooperate to cause the prepreg plies to conform to the desired shape of the stiffener bead.

公开(公告)号：WO1992005457A1

公开(公告)日：1992-04-02

申请号：PCT/US1991004678

申请日：1991-07-01

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  HOCKADAY, Bruce, D.

IPC: G02B06/12

CPC classification number: G02B6/122

Abstract: A wedge-shaped block of pyrolytic graphite or other suitable anisotropic material cut along certain predetermined angular dimensions is used as a thermal expansion coefficient transformer to match the anisotropic thermal expansion coefficients of a lithium niobate or lithium tantalate IO chip to an isotropic substrate material such as 316 stainless steel or aluminum, or to match the isotropic thermal expansion coefficients of a silicon IO chip to an isotropic substrate material, the wedge being used as an intermediate block mounted between the IO chip and the substrate, the anisotropic material used as the thermal transformer having a thermal expansion coefficient which is greater than the value of the thermal expansion coefficient of the IO chip material in one direction, and having a thermal expansion coefficient which is lesser than the thermal expansion coefficient of the IO chip material in another direction.

公开(公告)号：WO1991010156A2

公开(公告)日：1991-07-11

申请号：PCT/US1990007638

申请日：1990-12-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  MOREY, William, W. ,  LEONBERGER, Fred, J. ,  GLENN, William, H. ,  MELTZ, Gerald

IPC: G02F01/01

CPC classification number: G02B6/29322 ,  G02B6/022 ,  G02B6/02204 ,  G02B6/29395 ,  G02F1/0115 ,  G02F1/0126 ,  G02F1/0131 ,  G02F1/0147 ,  G02F1/125 ,  G02F2201/02 ,  G02F2201/307 ,  G02F2203/055

Abstract: A variable light filtering arrangement (10) includes at least one optical fiber section (11) including a waveguiding core (13), and at least one permanent Bragg grating region (12) in the optical fiber section. The grating region includes a plurality of grating elements constituted by periodic refractive index variations of a predetermined initial periodicity and cumulatively redirecting, of the light launched into the core for guided propagation therein, that having an axial wavelength within a narrow band around a central wavelength that is determined by the periodicity and refractive index variations of the grating elements. At least one of the periodicity and refractive index variations of the grating region is controlledly modified in such a manner as to temporarily change the central wavelength within a predetermined wavelength range.

Abstract translation: 一种可变光滤波装置（10）包括至少一个具有波导芯（13）的光纤部分（11）和至少一个位于所述光纤部分（11）中的永久布拉格衍射区（12） 光纤截面。 衍射区域包括由预定初始周期性的周期性折射率变化构成的多个衍射元件，并且累积地重新定向发送到其中其传播被传播的芯中的光， 中心波长附近的窄带中的轴向波长，其由衍射元件的周期性和折射率的变化确定。 衍射区域的周期性和折射率变化中的至少一个以受控方式改变，以暂时改变预定波长范围内的中心波长。