Abstract: A resonance fiber-optic gyro (RFOG) with quadrature error reducer is provided. The RFOG with quadrature error reducer includes a laser assembly, a fiber resonator assembly, a resonance tracking loop and a quadrature error reducer circuit. The resonance tracking loop, coupled to an output of the finder resonator assembly, is used to generate a resonance frequency signal that is coupled to an OPLL mixer in one of a CCW OPLL or the CW OPLL of the laser assembly. The quadrature error reducer circuit includes an amplitude control loop and a second harmonic phase control loop. The amplitude control loop is used to generate a common modulation signal. An output of the amplitude control loop is coupled to a common phase modulator in the laser assembly. The second harmonic phase control loop is used to selectively adjust a phase of a second harmonic modulation signal in the amplitude control loop at startup.

Abstract: A lightning protected gas turbine engine includes an engine mount structure, an engine case, a gas turbine engine, and a conductive rod. The engine mount structure has at least one engine mounting pad thereon, and the engine case is coupled to the engine mount structure. The gas turbine engine is disposed within the engine case and includes at least a rotationally mounted shaft. The conductive rod has a first end and a second end, and extends through the engine case and into the gas turbine engine. The first end of the conductive rod is electrically coupled to the shaft, and the second end of the conductive rod is electrically coupled to the at least one engine mounting pad.

Abstract: Free-space coupler devices are disclosed. In one embodiment, a free-space coupler device comprises a waveguide structure including a waveguide grating, and an out-of-plane coupler separated from and in optical communication with the waveguide grating. The waveguide grating and the out-of-plane coupler are separated by a distance that will yield an optical resonance at a desired operating frequency or wavelength of an optical signal, thereby maximizing a diffraction power of the optical signal at the out-of-plane coupler while minimizing a reflection power of the optical signal at the out-of-plane coupler.

Abstract: A building energy management system for controlling one or more building control units having points is disclosed. The building energy management system may be configured to display a schematic representation of a building control unit that is bounded to points in accordance with binding information. In response to receiving a point list request, the building energy management system may extract and generate a points list in a list format that includes some or all of the points in the schematic representation of the building control unit. Generating favorite points links, filtering points and batch setting point values are also contemplated.

Abstract: An aircraft data interface function (ADIF) server system comprises a processing module that hosts an aircraft condition monitoring function, comprising an airline modifiable information database including a history buffer and one or more logic units; a management information base (MIB) database; a parameter snapshot database; and a simple network management protocol (SNMP) agent in communication with the MIB database and parameter snapshot database. A core network unit communicates with the SNMP agent and an SNMP manager in an ADIF client. The SNMP agent sends messages to and receives messages from the SNMP manager through the core network unit. The ADIF server system interfaces with one or more avionics systems through a common data network to obtain and store aircraft parameter information. The ADIF client is configured via the core network unit to interact with the ADIF server system to request and receive the aircraft parameter information.

Abstract: A device comprises a flame detector, a camera, a mounting device, and a network connection device. The camera has a first field of view that overlaps a second field of view of the flame detector. The mounting device comprises one or more motors to change the first field of view and the second field of view, and the network connection device is configured to provide communication between an output of the flame detector, an output of the camera, and a remote device.

Abstract: Devices, methods, and systems for trapping multiple ions are described herein. One device includes two or more ovens wherein each oven includes a heating element and a cavity for emitting atoms of a particular atomic species from an atomic source substance, a substrate having a number of apertures that allow atoms emitted from the atomic source substance to exit the oven and enter an ion trapping area and wherein each oven is positioned at a different ion loading area within the ion trapping area, and a plurality of electrodes that can be charged and wherein the charge can be used to selectively control the movement of a particular ion from a particular loading area to a particular ion trap location.

Abstract: Apparatus and associated methods relate to an anti-rotation device (ARD) including a cylindrical ring extending along a longitudinal axis, the ring including proximal and distal faces. In an illustrative example, the ring may include proximal coupling members extending from the proximal face insertably engaging with mating recesses within a connector-disk. The ring may include distal coupling members extending from the distal face insertably engaging with mating recesses within a body-assembly, for example. The coupling members may extend, for example, parallel to the longitudinal axis. The ARD may be captured between the connector-disk and the body-assembly and may be retained by a proximal twist-lock cap screwably engaged with the body-assembly, such that relative rotational motion between the connector-disk and the body-assembly is substantially restricted, for example.

Abstract: An HVAC actuator that includes a motor to assist in driving an HVAC component between a first end stop and a second end stop, a return spring configured to provide a bias force toward the second end stop, and a controller operatively coupled to the motor. The controller may store a predetermined zero position that corresponds to the position of the HVAC component that results when the HVAC component is allowed to come to rest against the second end stop under the influence of the bias force of the return spring while the motor is interrupted from controlling the position and speed of the HVAC component. The controller may be configured to remove drive power to the motor before the HVAC component 14 reaches the predetermined zero position, allowing the return spring to gently park the HVAC component on the send end stop.

Abstract: A device for monitoring an identification and positioning system may comprise a transceiver and a controller operatively coupled to a memory. The controller may be configured to receive a status signal from the transceiver indicative of an inspection of a component, obtain an identity of the component, a location of the component, and a signal strength of a signal produced by the component, access a record from the memory, determine whether the record includes an identity of the component or a location of the component that matches the obtained identity or location of the component, observe a difference in the obtained signal strength and a signal strength from the record, and send a notification of an issue concerning the component when the difference is outside a range.

Abstract: Fan coil thermostats can provide energy savings by, for example, operating a fan coil system more efficiently. Fan coil systems employing such a fan coil thermostat may be more energy efficient. A fan coil system may include a fan coil that is configured for fluid communication with a source of heated fluid and/or a source of cooled fluid, a valve that controls fluid flow through the fan coil and a fan that blows air across the fan coil. The fan coil thermostat may include a controller that implements a control algorithm that calculates an error percentage value relating to a temperature difference between the current temperature and the temperature set point. The error percentage value may include a proportional term related to the temperature difference and an integral term related to the temperature difference. The controller may regulate the fan speed in accordance with the calculated error percentage.

Abstract: Embodiments relate generally to an ultrasonic detector, and methods of making the ultrasonic detector. The ultrasonic detector may comprise a piezoelectric element operable to convert the pressure of sound waves from mechanical energy into electric signal; a protective cover; a hot melt adhesive; one or more layers of solder; one or more perforated metal electrodes comprising openings filled with the solder; and one or more support elements. The ultrasonic detector may also comprise one or more casing elements operable to enclose and house the other elements of the ultrasonic detector; a printed circuit board (PCB) operable to receive ultrasonic data from the piezoelectric element and electrodes, wherein the electrodes connect to, or contact, the PCB; and an insulator located in proximity to the electrodes, and operable to prevent shorting between the metal electrodes and the metal casing elements.

Abstract: Embodiments relate generally to systems and methods for monitoring and indicating the sealing of a pneumatic valve. A method may comprise detecting a position of a first magnet, wherein the first magnet is fixed to a housing cover of the pneumatic valve; comparing the detected position of the first magnet with a predetermined optimum position of the first magnet, wherein the optimum position is the position of the first magnet when there is a sufficient seal between the housing cover and a housing base of the pneumatic valve; when the detected position of the first magnet is not within a threshold of the optimum position of the first magnet, indicating an insufficient seal between the housing cover and the housing base; and when the detected position of the first magnet is within a threshold of the optimum position of the first magnet, continuing normal operation of the pneumatic valve.

Abstract: Aircraft fly-by-wire systems and related vehicle electrical systems are provided. In one embodiment, an electrical system suitable for use with a control surface of a vehicle, such as an aircraft, is provided. The electrical system includes a plurality of communications buses and a plurality of control modules, wherein each of the plurality of control modules is connected to a respective subset of the plurality of communications buses that is unique among the plurality of control modules, and a plurality of actuation control modules associated with the control surface, wherein each of the plurality of actuation control modules is connected to a respective subset of the plurality of communications buses that is unique among the plurality of actuation control modules. Thus, each of the control modules is isolated from at least one of the communications buses.

Abstract: Systems and methods for alerting trailing aircraft about conditions experienced by a leading aircraft are disclosed herein. The systems and methods include an aircraft lighting system, which includes at least one external aircraft light and a memory module configured to store at least one criterion associated with an aircraft parameter. The systems and methods further include a receiver module operably connected to the memory module which is configured to receive an aircraft parameter. The systems and methods also include a processor module operably connected to the memory module, the receiver module and the at least one external aircraft light, the processor being configured to compare the received aircraft parameter to the stored at least one criterion and is further configured to determine, on the basis of the comparison, whether to cause illumination of the at least one external aircraft light for observance by trailing aircraft.

Abstract: Lightning-dissipative A/C assemblies are provided, as are valve frames utilized within lightning-dissipative A/C assemblies. In embodiments, the lightning-dissipative A/C assembly includes a base dielectric component having a mount interface, a strike-susceptible metallic component coupled to the base dielectric component, and mounting hardware configured to engage the mount interface to attach the base dielectric component to an A/C. An electrically-conductive coating overlies or is formed over at least a portion of the base dielectric component to complete a lightning strike dissipation path. The lightning strike dissipation path extends from the strike-susceptible metallic component, through the electrically-conductive coating, through the mounting hardware, and to an A/C electrical ground plane when the lightning-dissipative A/C assembly is installed on the A/C.

Abstract: A method for determining an amount of water in a sample includes utilizing a reagent and includes sulfur dioxide or derivative thereof, a protic or aprotic solvent or combinations thereof, a derivative of imidazole that has the following structure: wherein each of R, R1, and R2 is independently a hydrogen atom, a phenyl group, a substituted phenyl group, a first hydrocarbyl group having from 1 to 6 carbon atoms, or a second hydrocarbyl group having 1 to 6 carbon atoms interrupted in at least one position with a heteroatom, provided that R, R1, and R2 are not all hydrogen atoms. The reagent also includes a hydrogen halide donor. A molar ratio of the derivative of imidazole to the sulfur dioxide or derivative thereof is greater than 1:1. The method may include the step of providing a source of iodine.

Abstract: A method to augment, virtualize, or present mixed reality of content to display a larger amount of content on a head worn device (HWD) including: creating a set of virtual screens in the display of the HWD deployed in a manner to both surround and positionally shift from a movement of the viewer to provide an immersive viewing experience wherein the set of virtual screens include: at least a primary virtual screen and one or more secondary virtual screens; enabling the immersive viewing experience by generating dynamic virtual screen arrangements; connecting a first sensor attached to a head of the viewer and a second sensor attached to a torso of the viewer for generating sensed data of rotating differences of the positionally shift of the viewer; and configuring the content on each of the virtual screens to determine a particular virtual screen having a visual attention of the viewer.

Abstract: A turbine engine incorporating a fine particle separation means. The turbine engine includes: a compressor, a diffuser, and a flow path positioned downstream from the diffuser, wherein the flow path comprises an outer annular wall and an inner annular wall between which the compressed air flows, and wherein the flow path comprises an arc that redirects the compressed air from flowing in a substantially radial flow direction to a substantially axial flow direction. The turbine engine further includes an extraction slot in the outer annular wall that fluidly connects with a scavenge plenum, the extraction slot also being positioned downstream axially along the flow path from the arc. The turbine engine further includes an aspiration slot, downstream from the extraction slot, that allows air from the plenum to recirculate back into the flow path.

Abstract: Avionic display systems and methods are provided for generating avionic displays, which include symbology and other graphics pertaining to forecast overpressure events, which are forecast to occur during supersonic aircraft flight. In various embodiments, the avionic display system includes a display device on which an avionic display is produced. A controller architecture is operably coupled to the display device. Storage media contains computer-readable code or instructions that, when executed by the controller architecture, cause the avionic display system to determine whether an overpressure event is forecast to occur due to the predicted future occurrence of a sonic boom, which has a magnitude exceeding a boom tolerance threshold. When the controller architecture determines that an overpressure event is forecast to occur, the avionic display system further generates symbology on the avionic display indicative of or visually signifying the forecast overpressure event.