Abstract: Methods, apparatus, systems, and articles of manufacture are disclosed. An example locking assembly for an arresting hook system includes a track coupled to a frame of an aircraft. The track includes a forward end and an aft end opposite the forward end. The track includes a first lock positioned at the forward end and a second lock positioned at the aft end. The locking assembly includes a guide coupled to a hook shank of the arresting hook system. The guide is to move along at least a portion of the track, engage the first lock when the hook shank is in a stowed position, and bypass the second lock as the hook shank moves from the stowed position to a deployed position.

Abstract: Stacked satellite dispensing systems are described herein. The disclosed systems have diagonal struts that stabilize satellite stacks horizontally and vertically without adding performance-reducing mass. The diagonal struts increase the number of bracing points and improve stability. The improved stability can allow for the satellite stack to be made heavier and taller, such as by having more satellites than a dispensing system with vertical struts. The diagonal struts, which provide the improved stability, can also allow for sub-stacks to be used. The sub-stacks include batches of satellites retained by the stacked satellite dispensing system. Therefore, the stacked satellite dispending system can release single satellites batches at once, rather than all the satellites at once.

Abstract: A method is disclosed for determining and compensating a proportion of stray light of a measuring beam of a 3D laser scanner by which a 3D point cloud of an object to be detected can be generated via phase-based distance measurement including a first sequence by which first parameters of a proportion of stray light can be determined independently of the 3D point cloud and/or a second sequence by which second parameters of the proportion of stray light dependent on the generated 3D point cloud and a step can be determined. The proportion of stray light can be compensated as a function of the first parameters and/or the second parameters.

Abstract: A hinge assembly for connecting a door to a fuselage of an aircraft includes a hinge arm having a fuselage fitting pivotably coupled to a fuselage rotatable interface and a door fitting pivotably coupled to a door rotatable interface. The hinge assembly includes a programmable gear assembly coupled to the hinge arm allowing the hinge arm to pivot around the fuselage fitting when the door is moved from a door closed position to a door open position and causing the door to maintain in a generally parallel orientation relative to the fuselage between the door closed position to the door open position. The programmable gear assembly includes a fuselage gear coupled to the fuselage fitting, a door gear coupled to the door fitting, and a rack operably coupled between the fuselage gear and the door gear.

Abstract: A linear actuator driven flap mechanism for an aircraft wing is contained within a wing support and fairing of the aircraft wing. The rib frame of the flap mechanism is attached to the wingbox structure of the aircraft wing at a first and second point. The rib frame of the flap mechanism defines a width with a first and second web. A linear actuator and a motion linkage are positioned with the width between the first and second webs of the rib frame. The linear actuator is not mechanically driven rotary actuation or mechanically driven linear actuation. As a result of the compact construction, the flap mechanism can be employed in thinner, smaller aircraft wings being designed today.

Abstract: An actuator is disclosed including an actuator body mounted for movement over a range of motion, the range of motion including a first part and a second part, the first part being the range of motion extending between an end position and the second part. The actuator includes a motor coupled to the actuator body to move the actuator body in the first direction and a controller configured to control the supply of current to drive the motor. The mechanical resistance to movement of the actuator body in the first direction is higher in the first part of the range of motion than in the second part of the range of motion. The controller is configured such that any additional current supplied to the motor when the actuator body is in the first part of the range of motion is limited thereby causing the speed of the actuator body to reduce as the actuator body approaches the end position.

Abstract: A satellite constellation (200) comprises three artificial satellites (210A to 210C) that monitor a target area of the Earth (101). Each artificial satellite circulates on elliptical orbits having sun-synchronization and an orbit inclination angle. A long axis of each elliptical orbit forms an equal angle with each long axis of two adjacent elliptical orbits in a latitude direction.

Abstract: An example system for extraterrestrial deployment of a flexible membrane surface includes a flexible membrane having a periphery and an interior. The flexible membrane is rolled about a roll axis into a cylindrical geometric shape in an undeployed state. A payload base has extendable radial booms, wherein the distal end of each extendable radial boom is attached to the periphery of the flexible membrane and the interior of the flexible membrane is free of attachment to the extendable radial booms. The payload base and the extendable radial booms are positioned to one side of the flexible membrane along the roll axis. The extendable radial booms are configured to extend orthogonally to the roll axis from the payload base to unroll the flexible membrane about the roll axis to form the flexible membrane surface in a deployed state, wherein the roll axis is substantially orthogonal to the flexible membrane surface.

Abstract: A flexible coupling includes a first flange having an outer edge, a first surface, a second surface opposite the first surface, and a first plurality of passages. A second flange including an outer edge section, a first surface section, a second surface section opposite the first surface section, and a second plurality of passages. A connecting element extends between and connecting the first flange and the second flange through one of the first plurality of passages and one of the second plurality passages. The connecting element includes a connecting member having a first stop element and a second stop element. A compliant component is arranged on the connecting element. The compliant component is positioned on the connecting member between one of: the first stop element and the first surface; the second stop element and the second surface section; and between the second surface and the first surface section.

Abstract: An attitude control module is described for providing propellant-free attitude control and momentum desaturation to a spacecraft. The attitude control module includes at least one solar sail comprising a reflective surface for reflecting solar photons; and at least one robotic arm coupled to the at least one solar sail, said at least one robotic arm comprising at least 4 degrees of freedom for positioning and orienting the at least one solar sail relative to the spacecraft. A corresponding method for operating the attitude control module to unload excess momentum from a spacecraft is also described.

Abstract: A system (100) and method (300) for launching multiple satellites from a launch vehicle is provided. The system includes a mechanical structure (102) which has one or more mounting means (104A-F), a control unit (106) for controlling the one or more mounting means for positioning and separating the multiple satellites in the mechanical structure, an image capturing system for monitoring the positioning of each satellite in the mechanical structure. The mounting means are adapted to position the satellites in axial, inclined and radial separations at a distance to ensure that each satellite will not come in contact with each other in short duration as well as long duration of orbit evolution.

Abstract: A system enabling safe manned and unmanned operations at extremely high altitudes (above 70,000 feet). The system utilizes a balloon launch system and parachute and/or parafoil recovery.

Abstract: A system architecture for operation of aircraft flaps. The system architecture includes a first pair of motor drive units, the first pair comprising a first motor drive unit (MD1) and a second motor drive unit (MD3), and a second pair of motor drive units, the second pair comprising a third motor drive unit (MD2) and a fourth motor drive unit (MD4). The system further includes a first plurality of switches connected between the first motor drive unit (MD1) and the second motor drive unit (MD3), the first plurality of switches configured to operate a first electric motor and a second electric motor, and a second plurality of switches connected between the third motor drive unit (MD2) and the fourth motor drive unit (MD4), the second plurality of switches configured to operate a third electric motor and a fourth electric motor.

Abstract: A base station is disclosed for use with an unmanned aerial vehicle (UAV). The base station includes: an enclosure; a cradle that is configured to charge a power source of the UAV during docking with the base station; and a temperature control system that is connected to the cradle and which is configured to vary temperature of the power source of the UAV. The temperature control system includes: a thermoelectric conditioner (TEC); a first air circuit that is thermally connected to the TEC and which is configured to regulate temperature of the TEC; and a second air circuit that is thermally connected to the TEC such that the TEC is located between the first air circuit and the second air circuit. The second air circuit is configured to direct air across the cradle to thereby heat or cool the power source of the UAV when docked with the base station.

Abstract: A passively damped mechanical system is disclosed, for example for use in aerospace applications where vibration can adversely affect navigational and operational instruments. In one example, the passively damped mechanical system includes an end fitting of a strut used to connect a structural element to a payload. The end fitting may include outer and inner cylindrical hubs, with a space between the outer and inner cylindrical hub at least partially filled with a viscoelastic material. In a further example, the passively damped mechanical system includes legs used to connect a structural element to a bracket configured to support a payload. Each leg may include a hollow interior having a lattice structure to add strength and a viscoelastic material to provide passive damping.

Abstract: In some embodiments, systems are provided to determine distances to one or more objects, and comprise an image capture system; an angular movement system; an illumination source providing illumination having a time varying amplitude; and a range measurement circuit configured to: obtain, based on at least one of measured and induced LOS angular displacement changes relative to the image capture system, a set of candidate point-spread-functions (PSFs) corresponding to different possible ranges; deconvolve, using the candidate PSFs, at least a region of interest (ROI) in an evaluation image to obtain at least a set of deconvolved ROIs of the evaluation image, each corresponding to one of the candidate PSFs; identify a first candidate PSF that produces a deconvolved ROI resulting in a determined artifact power that is lower than a corresponding artifact power determined from the other candidate PSFs; and determine a distance corresponding to the first candidate PSF.

Abstract: Disclosed are a method of flying on the moon and a device for flying using the method. A medium on a surface of a moon and a medium accelerating module are used in the flying method. The medium is transferred into the medium accelerating module, accelerated by the medium accelerating module, and ejected out of the medium accelerating module by using a power supply. A counterforce is generated in accordance with the momentum conservation, and the counterforce overcomes the lunar gravity and drives a load to take off. The method is suitable for the environment of the moon where flight by means of atmospheric buoyancy is impossible due to the shortage of atmosphere.

Abstract: A release system for the release of satellites from a launch vehicle is provided that includes: (i) a torsion bar, having a first end which is fixed by means of support means to a launch vehicle and is locked in rotation around a longitudinal axis of the torsion bar, and a second end which is connected by means of hinge means to the launch vehicle and is free to rotate around the longitudinal axis; (ii) at least one launch arm extending perpendicularly from the torsion bar and comprising (a) a torsion lever having a first end which is fixed to the torsion bar in an integral manner, and (b) a guide having a first end connected to a second end of the torsion lever, and a second free end; (iii) at least one slider which is fixed in an integral manner to a satellite to be launched and arranged to engage the guide in a sliding manner; and (iv) and a limit stop element designed to act upon the torsion lever to stop the rotation of the launch arm around the longitudinal axis.

Abstract: A surface assembly and related method of constructing a surface assembly are used as part of a landing platform. The surface assembly includes a modular structure having an upper surface with a plurality of discrete elements. Each discrete element has a body of metal material defining at least one anchor aperture for receiving a hook or like anchor device for anchoring a helicopter or other powered light aircraft to the surface assembly. The surface assembly is configured to define an array of the plurality of discrete elements in which at least two of the anchor apertures are provided side-by-side. The body of each discrete element has a periphery, and each anchor aperture of the array is inboard of the periphery of a respective body of a discrete element in the array.

Abstract: An internal cabin of a vehicle includes a vehicle control area. A first door is coupled to the vehicle control area. The first door is moveable between a first open position and a first closed position. An aisle extends between the vehicle control area and a passenger seating area. A forward section of the aisle is disposed between a first monument and a second monument. A second door is disposed within the aisle between the first monument and the second monument. The second door is moveable between a second open position and a second closed position. A privacy vestibule is defined between the second door in the second closed position, the first monument, the second monument, and the vehicle control area.