A method for mitigating gust loads of unmanned aerial vehicles with large aspect ratio and conventional layout
A technology of large aspect ratio and machine gust, applied in the direction of wings, wing shapes, aircraft parts, etc., can solve problems such as complex results and unrealistic results in actual use, and achieve light weight and reduce flight control solutions. Calculation link, the effect of increasing the burden
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Embodiment 1
[0038] A method for mitigating gust loads of UAVs with a large aspect ratio conventional layout, comprising the following steps:
[0039] After judging the wind, start the gust mitigation mode, put the ailerons on the trailing edge of the wing in the loose-floating mode, and use the ailerons to float with the wind under the influence of the gust to quickly reduce the high-frequency short-period wind impact on the aircraft. The gust load increment generated by the wing; then the elevator is deflected to generate a moment opposite to the gust, controlling the attitude and trajectory of the aircraft.
[0040] Further, the specific steps are as follows:
[0041] Step 1). Judgment on demand for gust mitigation
[0042] Continuously take multiple shots to judge whether the vertical acceleration ay exceeds the safety threshold ay 安全 If there is any situation, it is judged that mitigation measures need to be taken, and the gust mitigation mode is activated; otherwise, the gust mitig...
Embodiment 2
[0058] In this example, an embodiment of the size parameters of a UAV with a large aspect ratio and a method for mitigating gust loads is given. The half-span length of the wing is 6 m, and the chord length of the wing is 1 m; three sets of ailerons are arranged on the wings, and one set of elevators is arranged on the horizontal tail. The maximum vertical gust speed is 4.2m / s, and the flight speed of the aircraft is 100m / s; the aileron deflects and slows down at the beginning, and the elevator deflects after the height is lowered by 50m.
[0059] In this example, the responses of parameters such as vertical acceleration, pitch angle, and trajectory with gust load mitigation control and without gust load mitigation control are compared, see Figure 4-Figure 8 , the comparison shows that the vertical acceleration is reduced by more than 20% (the corresponding gust load is also reduced by more than 20%), and the pitch angle and trajectory can be effectively controlled. In actua...
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