Split control system configuration for UAV autopilot architecture

    公开(公告)号:US11953918B2

    公开(公告)日:2024-04-09

    申请号:US16636427

    申请日:2018-07-27

    Inventor: Ashish Bhat

    CPC classification number: G05D1/101 B64C39/024 B64U10/13 B64U50/19 B64U2201/10

    Abstract: A split control system for UAV incorporating auto pilot is disclosed. Control system comprises a real-time low-level main processor, and a non-real-time high-level co-processor. The co-processor computes desired body rate values and feeds them to the main processor which may be with latency. Main processor computes one or more motor control signals based on the desired body rate values. The main processor also executes a rate damping loop algorithm based on instantaneous body rate values to generate one or more motor control signals to maintain stability of the UAV even in events of latency in desired body rate values from the co-processor. Instantaneous body rate values are either obtained directly from sensors without any latency or obtained by main processor indirectly with negligible latency. Main processor acts as an intermediate between sensors and co-processor by collecting raw sensor data and feeding the data to co-processor.

    Multi-rotor aerial vehicle with single arm failure redundancy

    公开(公告)号:US10882615B2

    公开(公告)日:2021-01-05

    申请号:US16060163

    申请日:2016-12-07

    Inventor: Ashish Bhat

    Abstract: The present disclosure provides a multi-rotor Aerial Vehicle comprising at least five arms. Pairs of coaxial contra rotating rotors/propellers are configured on each arm defining a polygon. In the event of failure of any one of the rotors/propellers, a control system incorporating an autopilot, shuts off corresponding contra rotating rotor/propeller of the pair to maintain yaw stability thereby rendering the corresponding arm non-functional; and adjusts throttles of the coaxial contra rotating rotors/propellers of remaining functional arms to maintain tilt and lift stability of the Aerial Vehicle.

    POINT CLOUD RENDERING ON GPU USING DYNAMIC POINT RETENTION

    公开(公告)号:US20200058164A1

    公开(公告)日:2020-02-20

    申请号:US16539271

    申请日:2019-08-13

    Inventor: Dhirendra SARUP

    Abstract: The present disclosure relates to generating a single vertex list/point-cloud list of an object for rendering the object in different complexity levels. The generated single vertex list comprises a large number of points obtained from external surfaces of the real-time object for detailed 3D representation and the list is updated with new batches of received point cloud vertices. The points are rendered from the single vertex list based on the correlation between zoom level and point retention factor. A scene's zoom/scaling level is altered by changing the distance of a camera to the objects represented by the rendered point cloud.

    QUICK RELEASE DEVICE
    15.
    发明公开

    公开(公告)号:US20240270416A1

    公开(公告)日:2024-08-15

    申请号:US18436874

    申请日:2024-02-08

    CPC classification number: B64U60/30 B64U60/50

    Abstract: A quick release device 100 for releasably coupling a pair of landing gears in a UAV includes a housing 400 having two slots 102 for receiving landing gears to be locked and released, and two snap levers 200 pivotally mounted in the housing 400 for movement between a lock position and a release position. The snap levers 200 include a locking feature 104 to engage with a corresponding feature on the landing gears to lock them with the housing 400. Snap levers 200 are located such that the two snap levers can be moved together by a single thumb or finger to the released positions. A sheet shaped planar biasing device 300 for biasing snap levers 200 towards the locked position is provided, which includes two generally U-shaped cut-outs defining cantilever springs in contact with the snap levers 200.

    ACTIVE PROPELLER SYSTEM
    16.
    发明公开

    公开(公告)号:US20230264839A1

    公开(公告)日:2023-08-24

    申请号:US18172370

    申请日:2023-02-22

    Inventor: Amey Damjee

    CPC classification number: B64U30/297

    Abstract: An improved propeller system is disclosed, including at least one resilient component configured with a mounting arrangement of a propeller of the propeller system. The resilient component is made of a resilient material that allows the propeller to tilt about a tethering axis under conditions of differential lift force on blades of the propeller under an advancing condition and a retreating condition. The resilient component includes a pair of cutouts for locating inserts made of a rigid material and positioned with a longitudinal axis of the inserts oriented in radial direction. The orientation of the inserts results in a radially oriented line contact between the propeller and the inserts to ensure that tilting of the propeller is about longitudinal axis of the inserts, defining the tethering axis of the propeller system.

    Unmanned aerial vehicle with co-axial reversible rotors

    公开(公告)号:US11565809B2

    公开(公告)日:2023-01-31

    申请号:US16648498

    申请日:2018-08-30

    Abstract: The present disclosure pertains to a multi-rotor unmanned aerial vehicle (UAV). Aspects of the present disclosure provide a UAV that includes at least four arms, each configured with a co-axial pair of contra rotating propellers, wherein each propeller has capability of rotating reversibly with associated reversal of direction of thrust, and an autopilot control system that controls rotational direction and speed of the at least four co-axial pairs of propellers to maintain yaw stability, roll stability and pitch stability of the UAV, wherein in an event of failure of any one co-axial pair out of the at least four co-axial pairs of propellers, the autopilot control system reverses direction of rotation and thereby direction of thrust of at least one propeller of any functional pair.

    EPP FOAM BASED UAV BATTERY ENCLOSURE

    公开(公告)号:US20230011789A1

    公开(公告)日:2023-01-12

    申请号:US17858653

    申请日:2022-07-06

    Abstract: A thermal management device for a battery pack 104 of an UAV is disclosed. The thermal management device 100 comprises an insulating enclosure 102 that is made of a material comprising at least an EPP foam for enclosing the battery pack 104, and one or more heating coils 110. The heating coils 110 are electrically powered from an external power source 112 for pre-heating the insulating enclosure 102 to a predefined temperature before flight of the UAV. The EPP foam of the insulating enclosure 102 provides high thermal insulation for retaining the heat of the insulating enclosure 102 for heating the battery pack 104 and maintaining the temperature of the battery pack 104 above a threshold temperature when the UAV flies in a sub-zero ambience temperature. The insulating enclosure 102 with the one or more heating coils 110 are configured to provide uniform heat distribution across the battery pack 104.

    UNMANNED AERIAL VEHICLE WITH CO-AXIAL REVERSIBLE ROTORS

    公开(公告)号:US20200223547A1

    公开(公告)日:2020-07-16

    申请号:US16648498

    申请日:2018-08-30

    Abstract: The present disclosure pertains to a multi-rotor unmanned aerial vehicle (UAV). Aspects of the present disclosure provide a UAV that includes at least four arms, each configured with a co-axial pair of contra rotating propellers, wherein each propeller has capability of rotating reversibly with associated reversal of direction of thrust, and an autopilot control system that controls rotational direction and speed of the at least four co-axial pairs of propellers to maintain yaw stability, roll stability and pitch stability of the UAV, wherein in an event of failure of any one co-axial pair out of the at least four co-axial pairs of propellers, the autopilot control system reverses direction of rotation and thereby direction of thrust of at least one propeller of any functional pair.

    UAV SYSTEM EMERGENCY PATH PLANNING ON COMMUNICATION FAILURE

    公开(公告)号:US20200175882A1

    公开(公告)日:2020-06-04

    申请号:US16636412

    申请日:2018-07-27

    Inventor: Rahul SINGH

    Abstract: The present disclosure relates to a system and method for executing safe-return of an Unmanned Aerial Vehicle (UAV) moving along a path having a plurality of communication waypoints in the event of a communication failure. In an aspect, the proposed method can include the steps of detecting, at the UAV, a communication failure; enabling the UAV to return to last healthy communication waypoint location; and based on status of the communication failure, enabling the UAV to return to its home location.

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