Abstract: Thermal barrier coatings for substrates comprising titanium. The thermal barrier coating may include a bond layer, an insulating layer, and a sealant layer. The bond layer may include titanium, a titanium alloy, an intermetallic compound of titanium, and/or a titanium metal matrix composite. The bond layer may have a superlattice structure having a periodically repeating group of layers. Methods for producing the thermal barrier coatings and articles of manufacture employing the thermal barrier coatings.

Abstract: A rotor blade attachment assembly for use with a rotor hub to which a rotor blade assembly is connected includes a hub extender having an inboard end and an outboard end. The inboard end of the hub extender is configured to form a connection with the rotor hub. A blade fold axis about which the rotor blade rotates relative to the rotor hub is defined at the connection. An inboard bearing is mounted within an interior of the hub extender adjacent the inboard end and an outboard hearing is mounted within the interior of the hub extender adjacent the outboard end. A tension torsion strap is operably coupled to the inboard bearing and the outboard bearing.

Abstract: A system includes a first cylinder. The first cylinder includes a first piston mounted in the first cylinder and a first channel formed in an inner wall of the first cylinder. The first cylinder is configured to hold a pressurized gas. The system further comprises a second cylinder surrounding the first cylinder. The second cylinder comprises a second piston mounted in the second cylinder. The second piston is configured to surround the first cylinder. The second cylinder further comprises a second channel formed in the inner wall of the second cylinder. The second cylinder is configured to hold a pressurized gas. The system further includes one or more seals coupled to the first and second pistons.

Abstract: A hub assembly for a rotary wing aircraft having a rotor shaft which rotates about a rotational axis includes: a hub extender arm coupled to the rotor shaft; a pitch bearing that is disposed within and connected to the hub extender arm; and a rotor blade assembly having an inboard section disposed within the hub extender arm and connected to the pitch bearing; wherein the hub extender arm has an inboard cross-sectional area where coupled to the rotor shaft that is greater than an outboard cross-sectional area where coupled to the pitch bearing.

Abstract: A molecular sensing device and method are described that include a microfluidics layer, a transduction layer fluidly connected to the microfluidics layer, and a transceiver layer electro-mechanically connected to the transduction layer. The microfluidics layer is configured to collect a sample from an environment, the transduction layer is configured to detect a presence of a specific analyte within the sample, and the transceiver layer is configured to generate an electrical signal in response to the specific analyte detected by the transduction layer and configured to transmit the electrical signal. At least a portion of the transduction layer and/or at least a portion of the microfluidics layer is configured to be replaceable without replacing a remaining portion of the transduction layer or the microfluidics layer.

Abstract: In one embodiment, an apparatus includes a first connector portion and a second connector portion. The first connector portion includes a first magnet, an electrical pin, and a first fiber optic connector. The second connector portion is configured to form a non-rigid connection to the first connector portion. The second connector portion includes a second magnet configured to mate with the first magnet of the first connector portion, an electrical contact configured to mate with the electrical pin of the first connector portion, and a second fiber optic connector configured to mate with the first fiber optic connector of the first connector portion.

Abstract: A multipaction-proof waveguide filter includes a main cavity and a number of corrugations extending from the main cavity. The main cavity includes corrugation interconnect regions between the plurality of corrugations. The corrugation interconnect regions include sloped surfaces, and the corrugations include flared nonparallel sidewalk. Due to the introduced sloped surfaces and flares, an increased Q is achieved, improved roll off is observed and multipaction risks are mitigated.

Abstract: A sensor system is provided. A body includes a first side extension configured to mount to a helmet, a second side extension configured to mount to the helmet, and a processing module support member coupled to the first side extension and the second side extension configured to accommodate a processing module. A first sensor sub-assembly is positioned at least partially in the first side extension. The first sensor sub-assembly includes a first cable that includes a first plug configured to be plugged into the processing module, and a first sensor communicatively coupled to the first plug via the first cable.

Abstract: A harmonic trap filter suppresses at least one harmonic signal produced by an amplifier and includes an input terminal and a ground terminal. The harmonic trap filter further includes a plurality of resonators electrically coupled one to another between the input terminal and the ground terminal in a spatial order defined by relative phase shift of alternating voltage bias signals respectively applied thereto. The resonators are tuned to resonate at a frequency at which a phase delay is imparted to the at least one harmonic signal by the resonators to effect cancelation of the at least one harmonic signal at the input terminal.

Abstract: A LIDAR device includes an array of lasers and an array of corresponding receivers. The spatial distribution of the lasers corresponds to that of the receivers. The array of lasers creates an array of beamlets and correlated receiver fields of view for dense three-dimensional point cloud mapping with precise angular spacing defined by lithographically grown transmitter and receiver arrays. A transmitter lens may be provided that maximizes optical throughput in a coaxial LIDAR by crossing the transmitter beamlets at the focus of the transmitter lens, where a transmit and receive combiner is also located. A single transmitter lens may be used to both collimate and steer the transmitter beamlets to generate a desired spot pattern in angle space. Control circuitry for the lasers may include a drive transistor with a power source coupled to a source terminal and an isolated gate driver coupled to a gate terminal.

Abstract: A monolithic fiber-lens array includes a number of optical fibers integrated into a fiber block and multiple lens elements integrated into a lens block. The fiber block is coupled to the lens block via a transparent adhesive layer, and the tips of the optical fibers are aligned with respective focal points of the lens elements.

Abstract: The present invention is directed to a redox flow battery comprising at least one electrochemical cell in fluid communication with a balancing cell, said balancing cell comprising: a first and second half-cell chamber, wherein the first half-cell chamber comprises a first electrode in contact with a first aqueous electrolyte of the redox flow battery; and wherein the second half-cell chamber comprises a second electrode comprising a catalyst for the generation of O2; and wherein the second half-cell chamber does not contain an aqueous electrolyte.

Abstract: Provided herein are various improvements to launch vehicle payload systems, such as employed to launch and deploy secondary payloads into orbit. In one example, a system includes a fairing configured to encase a payload within an envelope of a primary fairing of a launch vehicle, and a mount system configured to adapt a mounting port for the payload to a mounting port associated with the launch vehicle. The system also includes a fairing door configured to be commanded open for deployment of the payload after the primary fairing has open.

Abstract: Systems and methods are provided for wide scan phased array fed reflector systems using ring-focus optics to significantly improve the scan volume of such systems. The subject system includes a reflector having a focal plane and a parabolic curvature configured to receive electromagnetic radiation having a first gain and provide reflected electromagnetic radiation having a second gain greater than the first gain that collimates into a focal ring. The subject system includes a feed array having feed elements positioned about the focal ring, in which each feed element is configured to receive the reflected electromagnetic radiation from the reflector and collimate the reflected electromagnetic radiation into a scanned beam for scanning an annular region. In some aspects, the feed array is centered on the focal ring such that at least one feed element overlaps with the focal ring and remaining feed elements are non-overlapping with the focal ring.

Abstract: Systems, methods, and software described herein manage data from spaceborne and airborne nodes. In one implementation, a control system may obtain sensor data from sensors of spaceborne or airborne nodes. Once obtained, the control system may process the sensor data to determine metadata associated with the sensor data. Once processed, the sensor data may be stored in one or more data stores, such that applications may access the data based at least in part on the metadata.

Abstract: Provided herein are various improvements to laser communication ranging. In one example, a method includes converting a ranging signal in a radio frequency (RF) format into an optical format and combining the ranging signal in the optical format with data communications into an optical transmission for receipt by a communication node. The method also includes receiving from the communication node an additional optical transmission comprising additional data communications combined with a retransmitted version of the ranging signal, and determining an indication of a range to the communication node based at least on properties of the retransmitted version of the ranging signal.

Abstract: An augmented reality device. The device includes an integrated lens system having a field of view (FOV). The lens system includes a reflective layer, a transparent substrate layer, an external light control layer, and an anti-reflective layer. The device also includes a display device configured to present an image on an interior surface of the integrated lens system.

Abstract: According to certain embodiments, an image system comprises a display and a controller. A portion of the display is capable of a first visual fidelity level which is the highest visual fidelity capability of the display. The controller is configured to determine a first location of a point on the display where the center of gaze of a user intersects the display and determine a plurality of concentric regions on the display sharing a common center determined at least in part on the first location of the point. The controller is further configured to communicate a command to the display to reduce the angular and spatial resolution of selected regions below the first visual fidelity level, the reduction in visual fidelity of each region determined at least in part on a proximity of each region from the first location of the point, such that the regions farther from the point have greater levels of reduction in visual fidelity.

Abstract: A communication system includes a satellite constellation, one or more gateways and a network controller. The satellite constellation includes multiple satellites to facilitate communication between a number of user terminals (UTs). Each gateway communicates with one or more of the satellites. The network controller controls operation of the satellites, the gateways and the UTs. The satellites, the UTs, the gateways and the network controller include hardware that may also be software-defined network (SDN) enabled to ensure a persistent end-to-end data packet forwarding including proactive updates and reactive updates to forwarding tables. The proactive updates handle deterministic and time-synchronized link connectivity changes and the reactive updates handle ad hoc link connectivity changes.

Abstract: A system comprising a classical computing subsystem to perform classical operations in a three-dimensional (3D) classical space unit using decomposed stopping points along a consecutive sequence of stopping points of sub-cells, along a vector with a shortest path between two points of the 3D classical space unit. The system includes a quantum computing subsystem to perform quantum operations in a 3D quantum space unit using decomposed stopping points along a consecutive sequence of stopping points of sub-cells, along a vector selected to have a shortest path between two points of the 3D quantum space unit. The system includes a control subsystem to decompose classical subproblems and quantum subproblems into the decomposed points and provide computing instructions and state information to the classical computing subsystem to perform the classical operations to the quantum computing subsystem to perform the quantum operations. A method and computer readable medium are provided.