Knowledge

A hand-launched aircraft generally refers to a small fixed-wing UAV or radio-controlled aircraft that takes off when thrown by hand. Common applicatio

A rotary engine can be used as a power source for delivery UAVs. In this context, the term usually refers to a Wankel rotary engine. A triangular roto

Unmanned aerial vehicles (UAVs) can be classified by their aerodynamic layout, propulsion system, and flight mode. Common types include fixed-wing UAV

An electric automatic folding system uses a motor or electric actuator to drive a transmission mechanism, moving the UAV arms between their extended a

A planetary roller screw is a precision mechanical transmission device that converts rotary motion into linear motion. It uses multiple threaded rolle

A coaxial twin-rotor system uses two sets of rotors or propellers mounted along the same axis and rotating in opposite directions. This arrangement ca

A VTOL fixed-wing UAV must support both vertical takeoff and landing and fixed-wing cruise flight. Its propulsion system therefore needs to be configu

Unmanned rotorcraft can use different rotor configurations to meet requirements for payload, flight speed, hovering capability, endurance, and airfram

Coaxial rotor UAVs use two sets of counter-rotating rotors mounted on the same axis to generate lift and cancel most of the reaction torque. Compared

Industrial robots are generally more difficult to repair than civilian and commercial drones. Their repair work often involves precision transmission

Common robot components can be divided into four categories: structural support, motion-related components, power transmission, and sensing and contro

The service life of a screw conveyor depends in part on the wear resistance of its screw flights. During operation, the flights are exposed to continu