Abstract: A method and system (10) are provided for monitoring a restricted area (12) below a temporarily elevated worker (14) working on an elevated power transmission line (16). The method and system (10) utilize a Doppler radar module (40) that is temporarily elevated to a location (32) adjacent the worker (14) and that is configured to detect the presence of personnel (34) who enter the restricted area (12). The system (10) is configured to automatically alert personnel (34) at the worksite (17) who enter the restricted area (12) in response to detection of the personnel (34) by the Doppler radar module (40).

Abstract: A ceramic composition of matter includes a solvent material and a solute material. The solvent material comprises zirconia or hafnia, or a mixture thereof, which is stabilized with a stabilizing oxide. The solute material comprises a metal oxide of the formula, XaOb, where X is a metallic element, O is oxygen, and “a” and “b” are stoichiometric coefficients. The difference in density between the solvent material and the solute material is less than about 30%.

Abstract: Woven fabrics are formed from high tenacity fibers or tapes that are loosely interwoven with adhesive coated filaments, to composite articles formed therefrom, and to a continuous process for forming the composite articles.

Abstract: A method and apparatus incorporating the method where the method includes the steps of providing an access controller that controls locking devices on entry and egress portals of a secured area, registering the controller with an external website or information source that provides information about public threats existing outside the secured area and modifying an access level for entry into the secured area in response to notice of a public threat received from the external website or information source.

Abstract: A group of unsupervised detectors or control units, in wireless communication with a user, can be upgraded for the user with the addition of hardware and/or downloadable software to provide communications and information to a supervisory station. Supervisory station services can be implemented locally or via cloud based computer services. A displaced dealer can be contacted using codes carried by the detectors or control units for installation or activation of additional services.

Abstract: A microgrid system may control power distribution among a plurality of interconnected microgrids operated under droop mode. The microgrids may operate both autonomously and as part of the system. Stable power distribution between the microgrids may be performed by monitoring operation of the microgrids and electrically disconnecting the microgrids from one another when a power outage or performance outside of a tolerance is detected. Network lines between the microgrids may remain in communication while the microgrids are disconnected from one another. The microgrids may operate autonomously under a preset operating droop frequency until power stability is detected at a boundary between adjacent microgrids. The microgrids may communicate with one another adjusting operating droop until synchronization among microgrids is achieved and the microgrids can be reconnected into the microgrid system.

Abstract: A method of increasing the operational efficiency of an operating gas turbine engine includes supplying mechanical power from a first spool of the operating gas turbine engine to a first electrical machine to thereby generate electrical power using the first electrical machine and supplying mechanical power from a second spool of the operating gas turbine engine to a second electrical machine to thereby generate electrical power using the second electrical machine. The method further includes sensing one or more operational parameters of the operating gas turbine engine and, based on the one or more sensed operational parameters, ceasing to generate electrical power using the second electrical machine, and instead supplying at least a part of the electrical power generated by the first electrical machine to the second electrical machine to operate in motoring mode and to thereby generate and supply mechanical output power to the second spool of the engine.

Abstract: Systems and methods are operable maintain a proscribed Self Separation distance between an unmanned aircraft system (UAS) and an object. In an example system, consecutive intruder aircraft locations relative to corresponding locations of a self aircraft are determined, wherein the determining is based on current velocities of the intruder aircraft and the self aircraft, and wherein the determining is based on current flight paths of the intruder aircraft and the self aircraft. At least one evasive maneuver for the self aircraft is computed using a processing system based on the determined consecutive intruder aircraft locations relative to the corresponding locations of the self aircraft.

Abstract: A resonator fiber optic gyroscope (RFOG) is provided.

Abstract: Landing gear apparatus for an aircraft may include a steerable nosewheel assembly and left main landing gear wheels and right main landing gear wheels driven by motors. A controller may receive an angular position of the nosegear wheel assembly. The controller may respond to the angular position by transmitting wheel speed signals to one or more of the motors to maintain the center of gravity of the aircraft within a predetermined stability triangle and to perform short radii turning.

Abstract: A method and apparatus wherein the method includes the steps of a downstream controller of a security system advertising a service type of the downstream controller on a sub-network, a gateway controller of the security system detecting the advertisement and authenticating the downstream controller as being part of a group that also includes the gateway controller, the gateway controller sending a connection request to the downstream controller, the gateway and downstream controllers establishing an L4 connection based upon the connection request and the gateway and downstream controller establishing a L5 session channel through the L4 connection.

Abstract: A rotor blade for a compressor includes a pressure sidewall; a suction sidewall coupled to the pressure sidewall at a leading edge and a trailing edge; and a through hole extending between the pressure sidewall and the suction sidewall.

Abstract: A vehicle system is provided. The system includes a processor configured to receive data representative of a current attitude and a desired attitude and to generate display signals associated with the current attitude and the desired attitude. The system further includes a display device configured to receive the display signals and operable to selectively render an image including roll angle alert symbology. The roll angle alert symbology includes a first curved arrow.

Abstract: A method and apparatus where the apparatus performs the steps of detecting a moving object within a secured area, determining a size of the moving object, determining that the size exceeds a predetermined threshold value associated with an animal, determining an aspect ratio of the moving object, determining that the aspect ratio meets a predetermined aspect threshold value associated with an animal or crawling human, but not an upright human, retrieving an indicator from memory that establishes whether an animal is present or not present within the secured area and setting an alarm upon detecting that the moving object exceeds the predetermined size threshold, that the determined aspect ratio meets the aspect ratio of an animal or crawling human and that the indicator establishes that there is no animal present in the secured area.

Abstract: An air separation module includes a housing, a bundle of hollow fiber membranes, and a clam shell axial support assembly. The axial support assembly includes two supportive elements, each supportive element including a flow-through component. The flow-through component includes a plurality of openings through which a supply of fluid (e.g. oxygen enriched air) may pass. The axial support assembly is secured around the bundle of hollow fiber membranes at a position radially inward from the housing and radially outward from the fiber bundle.

Abstract: A system and method displays an intercept point on a synthetic vision display that conforms to the flight path intercepting the terrain when the nose of the helicopter is pitched up during landing. A steep approach during landing may be detected by an evaluation of, for example, attitude of the helicopter, rate of descent, and airspeed.

Abstract: A connection system for carrying a refrigerant may provide a hybrid redundancy in sealing a refrigerant flow from the surround system environment. The connection system may include a first sealing ring of a first type and a second sealing ring of a second type positioned downstream from the first sealing ring. In some embodiments, the first sealing ring may be in a groove positioned around the outside diameter of a male fitting. The second sealing ring may be positioned at an interface between the male fitting and a female fitting. In some embodiments, flanges of each fitting define the interface so that the second sealing ring may be positioned between the flanges of each fitting. The second sealing ring may be selected from a material that has a wider range of operating temperature than the first sealing ring so that in the event of failure in the first sealing ring, the second sealing ring may prevent leakage.

Abstract: A journal foil bearing includes a bearing retainer having one slot configured to receive a top foil leading edge tab and another slot configured to receive a top foil trailing edge tab. A backup support structure, integral to the bearing retainer, extends between and is at least partially defined by the slots. The retainer is configured so that, during operation, the trailing edge tab contacts the support structure at a position close to the friction force, thereby minimizing top foil bending stress and improving bearing strength.

Abstract: Systems and methods that utilize a terrain database to find the elevation of the ground in the area of ground-mapping illumination to optimize the tilt of a ground-mapping antenna. An exemplary system located on a host aircraft includes a memory that stores terrain elevation data and a component that provides height, position, and orientation information of the host aircraft. A processor receives the height, the position, and the orientation information; defines a desired terrain area to be mapped, based on the received information; retrieves terrain elevation data from the memory, based on the desired terrain area to be mapped; and calculates at least one tilt angle for a ground-mapping radar function based on the retrieved terrain height value and the aircraft's height, position, and orientation information. One or more actuators is commanded to move an antenna based on the calculated at least one tilt angle.

Abstract: An electric drive system may include a plurality of heat sensitive components, at least one temperature sensor positioned in or on each of the components and a system controller. The temperature sensors may be interconnected with the system controller to transmit temperature data from their respective heat sensitive components to the system controller. The system controller may be configured to transmit a reduced performance command in the event that a reached-temperature-threshold-limit signal is received from any one or more of the temperature sensors. System shutdown due to over temperature faults may be avoided.