Unmanned aerial vehicle control method and power system based on solid hydrogen fuel cell

Abstract

The invention discloses an unmanned aerial vehicle control method based on a solid hydrogen fuel cell and a power system. The method comprises the steps that the flight state of an unmanned aerial vehicle is obtained; if the unmanned aerial vehicle is in the rising state, an upper air door and a side air door are opened, a lower air door is closed, gas enters a vehicle body of the unmanned aerial vehicle from the upper air door to supply oxygen to a fuel cell, and a fan of the fuel cell exhausts used gas to the side air door at a first set rotating speed; if the unmanned aerial vehicle is in the descending state, a lower air door and a side air door are opened, an upper air door is closed, gas enters a vehicle body of the unmanned aerial vehicle from the lower air door to supply oxygen to a fuel cell, and a fan of the fuel cell exhausts used gas to the side air door at a first set rotating speed; and if the unmanned aerial vehicle is in the level flight state, the upper air door, the lower air door and the side air door are opened, and the fan of the fuel cell exhausts used gas to the side air door at a second set rotating speed higher than the first set rotating speed. An air pressurization system is not used, the system weight is reduced, and the system efficiency and the system reliability are improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a control method and power system of an unmanned aerial vehicle based on a solid hydrogen fuel cell. Background technique [0002] With the maturity of UAV technology, the production, application scenarios and commercial value of military and civilian UAVs are increasing year by year. As the core of the UAV system, the power system also puts forward higher requirements with the continuous improvement of endurance and load requirements. [0003] Existing unmanned vehicles mainly have diesel engines and batteries as their main power systems, and there are also tentative solutions to use high-pressure hydrogen cylinders or liquid hydrogen tanks combined with fuel cells. [0004] The disadvantages of diesel-powered UAV power systems are loud noise, harmful gas emissions, odor, and poor infrared concealment. Diesel fuel itself is flammable and cannot be used in occasions with ...

AI Technical Summary

Problems solved by technology

High pressure systems require pressure reducing and stabilizing valve systems to control pressure and hydrogen flow, further increasing weight and volume

At the same time, the high-voltage reliability requirements are high, and the safety reliability under flight conditions is low

[0007] In order to overcome the above problems, the existing technology adopts the solution of solid hydrogen and fuel cell. The fuel cell needs hydrogen and oxygen for chemical reaction to generate electricity. The solid hydrogen guarantees the supply of hydrogen, and the air pressurization system guarantees the supply of oxygen. It is not economical to use a bulky and energy-consuming air booster system on board, and it is not conducive to the endurance of drones

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