59results about How to "Achieve hover" patented technology

The invention relates to a vertical take-off and landing fixed-wing aircraft. The vertical take-off and landing fixed-wing aircraft comprises an aircraft body and semicircular wings, wherein the semicircular wings are symmetrically distributed relative to the aircraft body on the left and on the right; and propellers, which rotate around the axial directions of the semicircular wings, are arrangedin the semicircular wings. According to the vertical take-off and landing fixed-wing aircraft, as the semicircular wings are symmetrically arranged on the left and right sides of the aircraft body, the propellers, which rotate around the axial directions of the semicircular wings, are arranged in the semicircular wings, and the semicircular wings and the propellers integrally rotate around the axis perpendicular to the aircraft body, the vertical take-off and landing, hovering and cruising of an unmanned aerial vehicle are realized by adjusting postures of the semicircular wings and the propellers, the duration of flight of the unmanned aerial vehicle is prolonged, the volume and weight of the unmanned aerial vehicle are reduced by using the semicircular wings to replace the traditional fixed wings, the loading capacity and flexibility of the unmanned aerial vehicle are improved, the operation of the unmanned aerial vehicle is stable, and the aerodynamic performance of the unmanned aerial vehicle is good.

The invention provides a lifting-pushing type large-scale solar-powered unmanned aerial vehicle capable of taking off and landing in a non-runway field and hovering. The unmanned aerial vehicle has the layout of front-and-back parallel wings in a ladder shape; solar batteries are laid on the whole upper surface of a back wing; an elevon with the overall span is installed on the trailing edge of a front wing, and solar batteries are laid on other areas of the upper surface of the front wing except the elevon; four vertical plates are fixedly arranged on the lower surface of the back wing, and the lower end surfaces of the four vertical plates are fixedly connected with the four end surfaces of the front wing in the span direction by stay bars; a power propulsion system is fixedly installed on the leading edge of the back wing; and two vertical lifting systems are respectively fixed in two spaces formed by the front wing, the back wing and the stay bars. According to the lifting-pushing type large-scale solar-powered unmanned aerial vehicle, the problem of ultra-short distance / vertical takeoff and landing of a large-scale solar-powered airplane is solved by increasing the direct lifting power and reducing the takeoff field length, and additionally, the direct lifting power can be provided in a near space to realize spot hovering to perform a task.

The invention discloses a multi-dimensional moving disc type underwater glider and relates to the field of underwater gliders. The underwater glider is in a disc structure form. A main body structurecan move in all directions and has same hydrodynamic performance as a result of the symmetrical structures. A buoyancy adjusting device can adjust the size of net buoyance to generate a driving force,through which the underwater glider sinks and floats and the underwater glider suspends underwater. A linked adjusting device adjusts distribution of center of gravity of the underwater glider by linking a follow-up stable wing and a sliding mass block, so that the underwater glider glides stably along a direction and turns quickly. The underwater glider has a multi-dimensional moving ability inan underwater space and can meet the actual demand on investigation of a three-dimensional marine environment and the demand on long-term monitoring and data acquisition in a key area.