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公开(公告)号：US11072434B2
公开(公告)日：2021-07-27
申请号：US15960732
申请日：2018-04-24
摘要： A method and system to control a rotor system includes providing a controller communicably coupled to the rotor system, and automatically changing a rotor speed of the rotor system from a first rotor speed in a first flight mode to a second rotor speed in a second flight mode over a time period using the controller in accordance with an acceleration-rate profile that varies over the time period.
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公开(公告)号：US11072422B2
公开(公告)日：2021-07-27
申请号：US16004375
申请日：2018-06-09
摘要： Systems and methods include providing an aircraft with a fuselage, a tail boom or empennage extending from the fuselage, a main rotor, a tail rotor, and at least one counter torque device. The counter torque device provides counter torque to the fuselage to prevent rotation of fuselage when the main rotor is operated, particularly in right sideward flight (RSF) for conventional helicopters with a counter-clockwise rotating (when viewed from above the helicopter) main rotor.
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公开(公告)号：US11061410B2
公开(公告)日：2021-07-13
申请号：US16399893
申请日：2019-04-30
发明人： Kip Gregory Campbell
摘要： According to one implementation of the present disclosure, a method for determining angle-of-attack for an unpowered vehicle is disclosed. The method includes: determining a monotonic portion of a look-up curve of an angle-of-attack operating plot; during flight, determining, by an accelerometer disposed on the unpowered vehicle, first and second accelerometer outputs, where the first and second accelerometer outputs correspond to first and second body-fixed load factor measurements, respectively; determining an operating point on the monotonic portion by applying a quotient of the first and second accelerometer outputs to the angle-of-attack operating plot; and determining an angle-of-attack parameter corresponding to the determined operating point.
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公开(公告)号：US11053966B2
公开(公告)日：2021-07-06
申请号：US16002599
申请日：2018-06-07
IPC分类号： F16B5/02
摘要： In some examples, an apparatus comprises a surface and at least one flange extending from the surface. The fitting is operable to rotate from a first angular position to a second angular position based on contact between the at least one flange and a fastener and a torque applied to the fastener. In the first angular position, a gap separates the at least one flange from a barrier. In the second angular position, the at least one flange prevents rotation of the fastener based on contact between the barrier and the at least one flange. In some embodiments, the at least one flange comprises a plurality of flanges.
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公开(公告)号：US11053008B2
公开(公告)日：2021-07-06
申请号：US16161415
申请日：2018-10-16
发明人： Joseph Scott Drennan , Carlos Alexander Fenny , Michael John Ryan , John Richard Mccullough , Brett Rodney Zimmerman
摘要： A parasite aircraft for airborne deployment and retrieve includes a wing; a fuselage rotatably mounted to the wing; a dock disposed on top of the fuselage and configured to receive a maneuverable capture device of a carrier aircraft; a pair of tail members extending from the fuselage; and a plurality of landing gear mounted to the wing. A method of preparing a parasite aircraft for flight includes unfolding an end portion of a wing; unfolding an end portion of a tail member of the parasite aircraft; and rotating a fuselage of the parasite aircraft so that the fuselage is perpendicular to the wing. A method of preparing a parasite aircraft for storage includes rotating a fuselage of the parasite aircraft to be parallel with a wing of the parasite aircraft; folding an end portion of the wing; and folding an end portion of a tail member of the parasite aircraft.
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公开(公告)号：US11052993B2
公开(公告)日：2021-07-06
申请号：US16599483
申请日：2019-10-11
申请人： Bell Textron Inc.
IPC分类号： B64C27/57 , F16F3/02 , B64C11/28 , B64C29/00 , B64C27/80 , B64C27/605 , B64C11/38 , B64C27/59 , B64C11/32 , B64C27/64
摘要： An exemplary spring-loaded link for an aircraft including a spring interposed between a first and a second rod, the spring, when compressed, urging the first rod and the second rod away from each other.
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公开(公告)号：US20210199022A1
公开(公告)日：2021-07-01
申请号：US16732094
申请日：2019-12-31
申请人： Bell Textron Inc.
摘要： A duct for a ducted-rotor aircraft includes a hub, a duct ring, and a plurality of stators that extend outward from the hub. The duct ring defines a trailing edge. The duct includes one or more fittings, such as a system of fittings. Each fitting has a body that defines a first attachment interface that is configured to couple to structure of the duct ring and a second attachment interface that is configured to couple to one of the plurality of stators. The first and second attachment interfaces are spaced from each other such that when the fittings are coupled to the duct ring and the plurality of stators, all or substantially all of each of the plurality of stators are located aft of the trailing edge of the duct ring.
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公开(公告)号：US20210197672A1
公开(公告)日：2021-07-01
申请号：US16731360
申请日：2019-12-31
申请人： Textron, Inc.
摘要： A technique controls regenerative braking to reduce skidding of a vehicle. Such a technique involves imparting rotation to an alternating current (AC) electric motor to move the vehicle to a first commanded vehicle speed; applying a regenerative braking power to the AC electric motor to bring the vehicle to a second commanded vehicle speed; while applying the regenerative braking power, adjusting the level of regenerative braking power applied to follow a predetermined speed reduction rate; while adjusting the level of regenerative braking power applied, provide a limit to the maximum level of regenerative braking power available; and while providing the limit to the maximum level of regenerative braking power available, adjusting the limit to the maximum level of regenerative braking power available based on a current speed of the vehicle.
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公开(公告)号：US20210192962A1
公开(公告)日：2021-06-24
申请号：US16720543
申请日：2019-12-19
申请人： Bell Textron Inc.
摘要： An method for controlling an autonomous vehicle fleet, including obtaining, by a fleet controller, from a master schedule, a mission for a vehicle of a fleet of autonomous vehicles, where the mission is associated with a mission entry of the master schedule, generating vehicle commands according to mission parameters associated with the mission, maintaining a persistent connection with the vehicle, sending the vehicle commands to the vehicle using the connection, the vehicle commands causing the vehicle to execute the mission under control of the fleet controller, and monitoring operation of the vehicle during performance of the mission.
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公开(公告)号：US20210192405A1
公开(公告)日：2021-06-24
申请号：US16721132
申请日：2019-12-19
申请人： Bell Textron Inc.
摘要： In an embodiment, a fleet scheduler includes a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for: gathering data representing real-world conditions; generating and maintaining predictive models based on the gathered data; and generating a master schedule for a plurality of vehicles based on the gathered data and the predictive models.
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