Abstract: Convective cooling of gas turbine engine airfoil platforms is enhanced by grooving the interface of the platforms with corresponding platform-to-platform seals, thereby accelerating cooling airflow over the platform surfaces.

Abstract: A refrigerant system is provided with a pulse width modulation valve. A compressor temperature is monitored to prevent potential reliability problems and compressor failures due to an excessive temperature inside the compressor. A control changes the pulse width modulation valve duty cycle rate to maintain temperature within specified limits, while achieving the desired capacity, and complying with design requirements of a conditioned environment, without compromising refrigerant system reliability. As the compressor temperature increases, the pulse width modulation valve duty cycle time is adjusted to ensure that adequate amount of refrigerant is circulated through the compressor to cool the compressor internal components.

Abstract: A positional measurement system for a fan variable area nozzle (FVAN) remotely determines the position of each flap or set of flaps relative a core nacelle. The positional measurement system includes a sensor system with a multiple of transceivers located within the core nacelle to remotely measure the position of each flap or set of flaps without the heretofore necessity of moving measurement components.

Abstract: A generator and associated power supply system has a prime mover for driving a shaft to rotate. A pair of permanent magnets is associated with the rotating shaft. A first stator winding is associated with a first of said permanent magnets, with a customer DC bus for providing a first relatively low voltage to the customer DC bus. A second of said permanent magnets is associated with a second stator winding, and an engine accessory DC bus. The engine accessory DC bus provides power to a motor controller and associated accessory motors associated with the prime mover. The engine accessory DC bus is provided with a second relatively high voltage from the second stator winding.

Abstract: A system for counting objects, such as people, is provided having a camera (22) for capturing video images along an image plane (25) in which two-dimensional shapes or design (28) are spaced along the image plane (25), and a computer system (14, 22) for receiving the images and detecting objects associated with change occurring in the images, and counting one of the detected objects when of the detected objects approximates a shape (31) associated with the object being counted (e.g., ellipse shape, to count a person) that fully or substantially blocks a portion said two-dimensional shapes or design (28) in the image associated with the detected object, and the detected object meeting other criteria for the object, such as size or compactness of detected change within the object. The system is especially useful for counting people near external windowed doors (19) of a building entranceway doors by discriminating between spurious light crossing the image plane and people.

Abstract: A wireless communication system includes the ability to determine that a fault condition associated with at least a portion of a cell associated with a base station is likely. Disclosed examples include using information regarding call activity levels of various portions of a cell for determining an expected call activity level for at least one portion of the cell. One example includes using the least active portion of the cell as the portion of interest. Previously observed activity levels provide information to automatically determine an expected relationship between the activity levels of the portions of the cell. Disclosed examples include determining whether a deviation between the actual call activity level and the expected call activity level is statistically significant enough to indicate a fault condition with at least the portion of the cell, which is of interest.

Abstract: A power supply for an electric motor includes a converter that can increase and decrease a voltage supplied into an inverter and then into the stator windings of the motor. As a separate feature, the inverter includes a control coil which is positioned within a motor housing such that it may be cooled by a thermal management system for the motor.

Abstract: A reverse link load control strategy utilizes a total call load metric in place of a reverse signal strength indicator metric for managing reverse link resources. In a disclosed example, a load control module (40) measures the reverse signal strength indicator (62) and measures an active cell load (64) using known techniques. A relationship between the reverse signal strength indicator, the active cell load, an other cell load component and a jammer component provides the ability to determine the other cell load component and the jammer component. Once the other cell load component has been determined, a total call load based upon the active cell load component and the other cell load component provides a useful metric for allocating reverse link resources between existing users and for determining whether to allow a new user, for example.

Abstract: An articulating yoke mount includes a support plate, a first bracket assembly mounted to the support plate, and a second bracket assembly spaced from the first bracket assembly. A positioning of the support plate is selectively adjustable relative to the first bracket assembly and the second bracket assembly to position the support plate at a desired viewing angle.

Abstract: An electromechanical parking brake system for a heavy vehicle braked by air-actuated service brakes includes an EPB-ECU and a first electromechanical parking brake actuator controlled by the EPB-ECU. The electromechanical parking brake system further includes a redundant sub-system for applying a second parking brake in an event of a failure in the EPB-ECU or the first electromechanical parking brake actuator.

Abstract: An alternating scheduling algorithm is useful in a mesh network. Transmissions are scheduled along a branch in a tree structure such that simultaneous transmissions occur only in non-adjacent layers along the branch. In a disclosed example, every other layer is grouped into a set of layers such that the sets are mutually exclusive and the sets only include non-adjacent layers. One example includes designating one set of layers as the even layers and another set as odd layers. A scheduler schedules transmissions on the layers such that simultaneous transmissions along a branch occur only on layers within one of the sets while transmissions on the other set along the same branch are prevented. The sets of layers selected for transmission are alternated each subsequent scheduling window or frame.

Abstract: A sealed compressor includes a housing for receiving a compressor pump unit and an electric motor. The electric motor drives a driveshaft. The driveshaft extends to drive an element within the compressor pump unit to compress a fluid. The motor includes a rotor spaced from a portion of the housing by a gap. The driveshaft drives a counterweight, which has a radially outermost portion extending radially outwardly beyond a radially innermost portion of the stator. The radially outermost portion of the counterweight has an angled face to drive fluid into the gap.

Abstract: A seal assembly for a rotational assembly includes a first seal, a second seal and a crossover support. The crossover support includes a first geometry that interacts with the first seal and a second, different geometry that interacts with the second seal.

Abstract: The object of the present invention is to provide a method and elevator system (1) that substantially reduces the installation costs when adding new elevator calls to an existing elevator system, or to reduce the amount of hardware required on installation of a new elevator system. A single push button (2) or a combination of push buttons (2) can be used by a user (4) to register a plurality of elevator calls by operating the push button (2), or combination of push buttons (2), in a predetermined manner to register an elevator call.

Abstract: A gas turbine engine system for an aircraft includes a nacelle having a fan cowl with an inlet lip section and a core cowl, at least one compressor and at least one turbine, at least one combustor between the compressor and the turbine, a bleed passage, and a controller. The bleed passage includes an inlet for receiving a bleed airflow and an outlet that discharges the bleed airflow in an upstream direction from the outlet. The controller identifies an operability condition and selectively introduces the bleed airflow near a boundary layer of the inlet lip section in response to the operability condition.

Abstract: A propulsion system and method includes an annular exhaust nozzle about an axis radially outboard of the annular cooling flow nozzle and ejecting an exhaust flow through an annular exhaust nozzle about an axis radially outboard of the annular cooling flow nozzle.

Abstract: An alignment tool is used to ensure proper alignment of a component on a rotating gear relative to a non-rotating platter. The alignment tool includes a first arm member coupled to a locating feature on the gear, and a second arm member that is coupled to the first arm member such that the second arm member is movable relative to the first arm member. When the first arm member is coupled to the locating feature, the second arm member locates off the platter to verify proper alignment. The second arm member is cannot be fitted to the platter when there is improper alignment.

Abstract: An aircraft electrical system comprises a generator to be driven as part of a gas turbine engine. The generator supplies electrical power to a plurality of accessories associated with the gas turbine engine, and to an aircraft power bus in parallel to the supply to the accessories. A control detects a short circuit on the aircraft power bus. When a short circuit is detected on the aircraft power bus, a switch is driven open to disconnect the aircraft power bus from the generator. In this manner, the power will continue to be delivered to the plurality of accessories. In a separate feature, a control voltage is provided by an auxiliary permanent magnet generator to a voltage regulator for the main generator.

Abstract: A solid state power control includes a sensor to detect when the power control is not connected to a power source. Disconnecting the power source turns off an output stage in the power control. If the power control receives a command to turn on its output stage while the power source is disconnected from the power control or otherwise not present, logic in the power control prevents the command from reaching the output stage. When the power source is connected or reconnected to the power control, the output stage remains off until the logic detects a zero crossing in the power source, thereby preventing high inrush currents into the power control. Suppressing high inrush currents caused by power source reconnection ensures that any current trip circuitry in the power control will be activated only by short circuit conditions and not by abnormal inrush currents.