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前飞段飞行能力是无人直升机进行超视距飞行的基础,而侧风是影响无人直升机前飞段飞行安全的一个重要因素,因此前飞段的抗侧风策略制约着无人直升机的超视距飞行能力。目前,无人机主流的两种前飞抗侧风策略是侧滑法和侧航法。侧滑法是通过飞机的滚转来抵抗侧风对飞机产生的侧力,飞行中一直存在侧滑角;侧航法则是将航向偏转至空速方向来消除侧风产生的侧滑,实现无侧滑的飞行。从这两种方案着手,设计了4种前飞段抗侧风方案,并进行了对比分析,来分别满足不同的工程需求。
The flight capability of the front flight section is the basis for the unmanned helicopter’s over-the-horizon flight, and the crosswind is an important factor that affects the flight safety of the unmanned helicopter’s front flight section. Therefore, the anti-sidewind strategy of the front flight section restricts the unmanned helicopter’s Over-the-horizon flight ability. At present, the two predominant anti-crosswind strategies of the UAVs are the slip-and-fly method. The side slip method is to resist the lateral force generated by the crosswind on the aircraft through the rolling of the aircraft. There is always a side slip angle in flight. The law of side navigation is to deflect the heading to the direction of airspeed to eliminate the side slip caused by crosswind, Sliding flight. Starting from these two schemes, four kinds of anti-crosswind schemes were designed and carried out comparative analysis to meet different engineering requirements respectively.