Various embodiments of a variable geometry quadrotor with a compliant frame are disclosed, which adapts to tight spaces and obstacles by way of passive rotation of its arms.

The present invention relates to a drone having a movable propeller shaft, the drone comprising: a drone body having an opening formed thereon; a plurality of propeller shafts arranged radially on the drone body, each propeller shaft having one side portion passing through the opening of the drone body to be disposed inside the drone body and a propeller housing equipped with a propeller and a propeller motor; adjustment means disposed on the drone body, linked to the plurality of propeller shafts, respectively, and configured to adjust the respective angles and heights of the plurality of propeller shafts; a sensor for sensing a rotation angle of each of the plurality of propeller shafts; and a motor driver connected to each propeller, a current check circuit for determining whether current flow is normal, an MCU for transmitting and receiving signals in connection with the current check circuit and transmitting signals to the motor driver, and a main controller connected to the MCU through a wireless communication method.

The present invention relates to a drone having a movable propeller shaft, the drone comprising: a drone body having an opening formed thereon; a plurality of propeller shafts arranged radially on the drone body, each propeller shaft having one side portion passing through the opening of the drone body to be disposed inside the drone body and a propeller housing equipped with a propeller and a propeller motor; adjustment means disposed on the drone body, linked to the plurality of propeller shafts, respectively, and configured to adjust the respective angles and heights of the plurality of propeller shafts; a sensor for sensing a rotation angle of each of the plurality of propeller shafts; and a motor driver connected to each propeller, a current check circuit for determining whether current flow is normal, an MCU for transmitting and receiving signals in connection with the current check circuit and transmitting signals to the motor driver, and a main controller connected to the MCU through a wireless communication method.

An aerial vehicle includes a center body, two arm assemblies arranged at the center body, a power device, and a driver mechanism mechanically coupled to the arm assemblies. The power device includes two first and two second rotor power assemblies. Each pair of first and second rotor power assemblies are installed at two ends of an arm assembly. The driver mechanism drives the arm assemblies to move relative to the center body such that distal parts of the two arm assemblies move between first and second height positions. In a direction of a roll axis of the power device, the first rotor power assemblies are closer to an installation site on the center body than the second rotor power assemblies. When the distal parts are at the second height position, spacing between the first rotor power assemblies is larger than spacing between the second rotor power assemblies.

An aerial vehicle includes a center body, two arm assemblies arranged at the center body, a power device, and a driver mechanism mechanically coupled to the arm assemblies. The power device includes two first and two second rotor power assemblies. Each pair of first and second rotor power assemblies are installed at two ends of an arm assembly. The driver mechanism drives the arm assemblies to move relative to the center body such that distal parts of the two arm assemblies move between first and second height positions. In a direction of a roll axis of the power device, the first rotor power assemblies are closer to an installation site on the center body than the second rotor power assemblies. When the distal parts are at the second height position, spacing between the first rotor power assemblies is larger than spacing between the second rotor power assemblies.

A convertible multi-mode vehicle capable of motorized travel in the air, on land, on water, and under water. The multi-mode vehicle is capable of controlled aerial flight, movement on the ground in terrestrial environments, on an aquatic surface, as well as underwater by changing between the different modes. Pivoting propulsion motors enable a convertible configuration from one vehicle locomotion mode to another.

A convertible multi-mode vehicle capable of motorized travel in the air, on land, on water, and under water. The multi-mode vehicle is capable of controlled aerial flight, movement on the ground in terrestrial environments, on an aquatic surface, as well as underwater by changing between the different modes. Pivoting propulsion motors enable a convertible configuration from one vehicle locomotion mode to another.

Systems and methods directed to a rotor blade assembly for an unmanned aerial vehicle (UAV) are provided. A system may include a rotor blade assembly including an axle assembly, a first rotor arm supporting a first rotor blade and coupled to rotate about the axle assembly, a second rotor arm supporting a second rotor blade and coupled to rotate about the axle assembly, and a torsion spring coupled to the first rotor arm and the second rotor arm, such that a rotation of one of the first rotor arm or the second rotor arm about the axle assembly applies a spring force to the other of the first rotor arm or the second rotor arm. Additional systems and related methods are also provided.

Systems and methods directed to a rotor blade assembly for an unmanned aerial vehicle (UAV) are provided. A system may include a rotor blade assembly including an axle assembly, a first rotor arm supporting a first rotor blade and coupled to rotate about the axle assembly, a second rotor arm supporting a second rotor blade and coupled to rotate about the axle assembly, and a torsion spring coupled to the first rotor arm and the second rotor arm, such that a rotation of one of the first rotor arm or the second rotor arm about the axle assembly applies a spring force to the other of the first rotor arm or the second rotor arm. Additional systems and related methods are also provided.

An unmanned aerial vehicle includes a plurality of rotors, a first type of rotation driver to drive one or more first rotors included in the plurality of rotors, a second type of rotation driver to drive one or more second rotors included in the plurality of rotors, and a controller configured or programmed to control rotation of the plurality of rotors by controlling the first type of rotation driver and the second type of rotation driver. The controller, when performing a landing operation, is configured or programmed to generate a difference between a first thrust that is a sum of thrust generated by the one or more first rotors, and a second thrust that is a sum of thrust generated by the one or more second rotors, smaller than that during hovering.