Abstract: Disclosed herein is methods, systems, and aircraft for performing refueling operations. A method of controlling pilot director lights includes generating, using a camera of a tanker aircraft, a two-dimensional (2D) image of a receiver aircraft and a refueling boom of the tanker aircraft, determining a 2D position of a boom receptacle on the receiver aircraft within the 2D image, determining a three-dimensional (3D) position of the boom receptacle with regard to an origin location of the camera of the tanker aircraft, moving the 3D position of the boom receptacle to have a boom pivot origin to produce a moved 3D position of the boom receptacle, and controlling one or more pilot director lights based on the moved 3D position.

Abstract: Disclosed herein is methods, systems, and aircraft for performing image analysis for aiding refueling operations. A tanker aircraft includes a single camera, a refueling boom, a camera configured to generate a 2D image of the refueling boom, a processor, and non-transitory computer readable storage media storing code. The code being executable by the processor to perform operations comprising receiving the 2D image from the single camera, determining 2D keypoints of the refueling boom located within the 2D image based on a predefined point model of the refueling boom, determining keypoints in 3D space based on the 2D keypoints to produce 3D keypoints, determining a 6DOF pose using the 2D keypoints and the 3D keypoints, and estimating a position of a tip of the refueling boom based on the 6DOF pose.

Abstract: Methods and systems for determining the connection status of a boom of a tanker aircraft with a receiver aircraft. The detection utilizes sensors mounted on the boom. Signals from the sensors are converted from a time domain to a frequency domain. Modes within the frequency domain are identified and analyzed to determine the connection status of the boom with the receiver aircraft.

Abstract: The present disclosure relates to a method for producing a nonwoven fabric that improves filtration performance when applied as a filter material. By adjusting the modification ratio of the Y-shaped cross-section of polyester filaments constituting the nonwoven fabric, when applied to a filter by increasing a specific surface area of the nonwoven fabric, it increases the collection amount of the materials to be filtered and maintains a low differential pressure, thus enabling long-term use.

Abstract: The present disclosure relates to a method for preparing a non-woven fabric which improves impregnation and release properties of a fabric softener in the non-woven fabric in order to apply the non-woven fabric to a dryer sheet (sheet-type fabric softener). When increasing porosity and specific surface area in a non-woven fabric made of two-component blended polyester long fibers, impregnation and release rate of a fabric softener are improved even when the non-woven fabric is lightened, making it possible to apply the non-woven fabric to a dryer sheet.

Abstract: The present invention relates to a spunbond nonwoven fabric with improved opening quality and no hazardous residue, a manufacturing method thereof, and a manufacturing apparatus thereof. The method for manufacturing a spunbond nonwoven fabric according to the present invention includes a step of allowing the continuous filament bundle to collide with a metal member containing bismuth (Bi) or a bismuth alloy to obtain filaments opened by frictional charging.

Abstract: The present disclosure relates to a spunbond nonwoven fabric for a base fabric for tile carpet which not only has excellent spinnability during the production of nonwoven fabric and improves tensile strength and tensile elongation, and has the effect of recycling waste such as polyester plastic, by using recycled polyester with optimized intrinsic viscosity, crystallization temperature, and number of foreign matters as a raw material, and a tile carpet using the same.

Abstract: Described are systems and methods for deploying and stowing a refueling boom. In certain examples, deploying the refueling boom includes lowering a refueling boom structure with a hoist while a boom aerodynamic control surface of the refueling is deactivated, determining that first transition conditions have been met, switching the hoist actuator state mode, and activating the boom aerodynamic control surface. In other examples, stowing the refueling boom includes flying the refueling boom towards a fuselage, determining that second transition conditions have been met, switching the hoist actuator state mode, and raising a refueling boom structure of the refueling boom with the hoist.

Abstract: The present disclosure relates to a spunbond nonwoven fabric for a tile carpet base fabric which can manufacture tile carpets with excellent sound absorption performance and tuft withdraw force, including high-thickness nonwoven fabrics made of hollow fibers to which recycled polyester raw materials are applied, and a tile carpet using the same.

Abstract: The present disclosure relates to a method for preparing a non-woven fabric which improves impregnation and release properties of a fabric softener in the non-woven fabric in order to apply the non-woven fabric to a dryer sheet (sheet-type fabric softener). When increasing porosity and specific surface area in a non-woven fabric made of two-component blended polyester long fibers, impregnation and release rate of a fabric softener are improved even when the non-woven fabric is lightened, making it possible to apply the non-woven fabric to a dryer sheet.

Abstract: Described are systems and methods for deploying and stowing a refueling boom. In certain examples, deploying the refueling boom includes lowering a refueling boom structure with a hoist while a boom aerodynamic control surface of the refueling is deactivated, determining that first transition conditions have been met, switching the hoist actuator state mode, and activating the boom aerodynamic control surface. In other examples, stowing the refueling boom includes flying the refueling boom towards a fuselage, determining that second transition conditions have been met, switching the hoist actuator state mode, and raising a refueling boom structure of the refueling boom with the hoist.

Abstract: The present disclosure relates to a nonwoven fabric for primary carpet backing and a method for manufacturing same, the non-woven fabric having different colors on the two sides thereof and improved mechanical property. More specifically, the present disclosure relates to a non-woven fabric for primary carpet backing and a method for manufacturing same, wherein any one surface of the two surfaces of appears in a range of white to grey and the opposite surface thereof appears in a range of dark grey to black, so that the separate manufacture of non-woven fabrics having various colors according to carpet colors is not required, which facilitates the inventory management of the non-woven fabric, achieves color matching between a carpet pile yarn and a nonwoven fabric for primary carpet backing, and improve the efficiency of the carpet manufacturing process.

Abstract: The present disclosure relates to a method for producing a nonwoven fabric that improves filtration performance when applied as a filter material. By adjusting the modification ratio of the Y-shaped cross-section of polyester filaments constituting the nonwoven fabric, when applied to a filter by increasing a specific surface area of the nonwoven fabric, it increases the collection amount of the materials to be filtered and maintains a low differential pressure, thus enabling long-term use.

Abstract: The present disclosure relates to a method for producing a nonwoven fabric which improves the impregnation property of a fabric softener in the nonwoven fabric so as to apply the nonwoven fabric to a dryer sheet (sheet-type fabric softener). In a nonwoven fabric made of two types of polyester long fiber mixed filament yarns, by widening the specific surface area, adjusting the evenness deviation to be small and increasing the porosity, the impregnation property of a fabric softener is improved even when the nonwoven fabric is made lightweight, and the nonwoven fabric can be applied to a dryer sheet.

Abstract: The present disclosure relates to a nonwoven fabric having enhanced withdrawal force for a carpet backing fabric, which is composed of a nonwoven fabric comprising 50 to 90% by weight of polyester filaments having a melting point of 250° C. or higher and 10 to 50% by weight of low-melting point copolyester filaments having a melting point of 200° C. or lower. According to the present disclosure, a nonwoven fabric comprising low-melting point polyester fibers is used as a backing fabric and the thickness of the backing fabric is controlled, so that the withdrawal force of carpets is enhanced, thereby suppressing the falling out of BCF yarns from the carpet.

Abstract: A system for detecting a sensor fault of an aerial refueling boom. The system comprises a data collector configured to receive sensor data from a plurality of sensors and determine an aerial refueling boom elevation angle of the aerial refueling boom based on the sensor data, wherein the sensor data comprises at least one of cable length data, a dynamic pressure data or aerial refueling boom position data. The system further comprises a processing unit configured access a database table in a storage unit to determine an estimated aerial refueling boom elevation angle, a comparator configured to compare the estimated aerial refueling boom elevation angle to the determined aerial refueling boom elevation angle, and a fault detector configured to generate a sensor fault signal based on the comparison.

Abstract: Systems and methods according to one or more embodiments are provided for rate and position control modes used in the operations of a telescoping refueling boom system. In one example, a system includes a telescoping tube and an actuator coupled to the telescoping tube and configured to extend and/or retract the telescoping tube. A processor is coupled to the actuator and configured to select a telescoping tube rate control mode and/or a telescoping tube position control mode based on a telescoping tube current position error, a telescoping tube current rate of movement, and a value of a telescoping tube rate command.

Abstract: Systems and methods according to one or more embodiments are provided for rate and position control modes used in the operations of a telescoping refueling boom system. In one example, a system includes a telescoping tube and an actuator coupled to the telescoping tube and configured to extend and/or retract the telescoping tube. A processor is coupled to the actuator and configured to select a telescoping tube rate control mode and/or a telescoping tube position control mode based on a telescoping tube current position error, a telescoping tube current rate of movement, and a value of a telescoping tube rate command.

Abstract: An aerial refueling boom elevation estimation (“ARBEE”) system for estimating an elevation angle of an aerial refueling boom on an aerial refueling aircraft is described. The ARBEE system may include a data collector, storage unit, optimizer, and comparator.

Abstract: A control system for an aircraft refueling boom controls the movements of the boom in certain areas in a total field of movement volume of possible boom movements based on the location of the boom in the total field of movement volume and based on the current rate of movement of the boom in the total field of movement volume.