Daytime climbing flight method for reducing weight and size of solar unmanned aerial vehicle

Abstract

The invention discloses a daytime climbing flight method for reducing the weight and size of a solar unmanned aerial vehicle, and belongs to the field of design of air vehicles. The daytime climbing flight method for reducing the weight and size of the solar unmanned aerial vehicle comprises the steps that with 24 hours as a cycle, the solar unmanned aerial vehicle cruises at a normal cruising altitude from the sunrise moment t1 to the time when a secondary power supply is fully charged; from the moment when the secondary power supply is fully charged, residual solar energy is fully used by the unmanned aerial vehicle for climbing flight; the unmanned aerial vehicle starts to descend with power after climbing to the specific altitude, and the unmanned aerial vehicle starts to slide downwards without power from the moment when the secondary power supply starts to participate in power supply till the unmanned aerial vehicle slides downwards to the normal cruising altitude; and the unmanned aerial vehicle cruises all over the night in a constant-altitude mode at the normal cruising altitude by means of energy provided by the secondary power supply till the sunrise moment of the next day, the circulating cycle of one day is ended, and the next cycle is started. According to the daytime climbing flight method for reducing the weight and size of the solar unmanned aerial vehicle, the flight strategy that the solar unmanned aerial vehicle climbs after noon and then falls, so that the energy demand for the secondary power supply is reduced, the weight of the secondary power supply is reduced to a certain extent, the weight and size of the solar unmanned aerial vehicle are reduced accordingly, and the feasibility of the scheme is improved.

Description

technical field [0001] The invention belongs to the field of aircraft design, and relates to a scheme design of a solar-powered drone, in particular to a daytime climbing flight strategy capable of reducing the design weight of a solar-powered drone, reducing its design size, and improving the feasibility of the scheme. Background technique [0002] A solar-powered drone is an unmanned aerial vehicle that uses solar radiation as propulsion energy. During the day, rely on the photovoltaic cells laid on the surface of the wing and tail to convert solar energy into electrical energy, maintain the operation of the power system, avionics equipment and payload, and use the remaining energy to charge the airborne secondary power supply; at night, use the secondary The energy stored in the power supply maintains the normal operation of the entire drone. If the energy stored during the day can meet the needs of the night, solar-powered drones can theoretically achieve permanent air ...

AI Technical Summary

Problems solved by technology

At the current level of technology, the energy density of the secondary power supply system is low, and the secondary power supply that meets the needs of night flight is relatively heavy, accounting for more than 35% of the weight of the whole aircraft, which seriously limits the load capacity of solar-powered UAVs. Expansion and improvement of flight performance

The improvement of the energy density of the secondary power supply requires a lot of manpower, financial resources and time, and it is difficult to achieve a major breakthrough in the short term.

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