Oil-electricity hybrid power vertical lifting fixed wing long-endurance unmanned aerial vehicle

Abstract

The invention discloses an oil-electricity hybrid power vertical lifting fixed wing long-endurance unmanned aerial vehicle which is of three-body parallel arrangement, so that a vehicle body has a relatively large loading space, and with the combination of an inclination mechanism and an oil-pneumatic variable-distance mechanism, relatively high pneumatic efficiency and relatively large carrying capability are achieved. In the takeoff, cruising and landing process of the unmanned aerial vehicle, main vertical lifting force in a vertical lifting period is provided by a first fuel power inclination variable-distance system and a second fuel power inclination variable-distance system, auxiliary vertical lifting force in the vertical lifting period is provided by a first lifting force electromotor and a second lifting force electromotor, and with the combination of the four power systems, posture adjusting moments for pitching and transverse rolling are provided. Due to adoption of the fuel power inclination variable-distance systems, relatively high thrust force and very high pneumatic efficiency are achieved, and different pneumatic effects expected by propellers in the vertical lifting and horizontal cruising process can be completely met through variable distances. Relatively high pneumatic efficiency and relatively good capability can be finally achieved, and a relatively longendurance time is achieved.

Description

technical field [0001] The present invention relates to the field of vertical take-off and landing fixed-wing unmanned aerial vehicles, in particular to an oil-electric hybrid vertical take-off and landing fixed-wing long-endurance unmanned aerial vehicle. Background technique [0002] With the advancement of science and technology, especially the rapid development of flight control computer technology, communication technology, and electronic technology, the performance and types of unmanned aerial vehicles continue to increase. Unmanned aerial vehicles have small size, low cost, and convenient use and maintenance. The advantages are more obvious. Therefore, its application demand in national defense and civilian fields has increased dramatically. [0003] The definition of vertical take-off and landing fixed-wing aircraft is: it can take off / land at zero speed and has the ability to hover, and can fly horizontally in fixed-wing mode. Compared with traditional aircraft, v...

AI Technical Summary

Problems solved by technology

The disadvantage is that adding a set of power equipment increases the weight of the structure

There is a fuel engine that provides horizontal thrust, and a tilting mechanism is added to allow the first two motors to also provide horizontal thrust, which reduces the overall energy utilization efficiency

Second, the use of electric motors to complete vertical take-off and landing, the existing motor and battery technology is simply not enough to support heavy load take-off and landing; this makes the drone's load capacity limited

Third, the first two motors that can be tilted use fixed-pitch propellers. Experiments have proved that the requirements for propeller pitch are completely different between the rotor state and the fixed-wing level flight state. Using fixed-pitch propellers will cause a serious drop in aerodynamic efficiency, so we must To achieve higher aerodynamic efficiency, variable pitch propellers must be used

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