The invention relates to an attack angle limitation design method for avoiding stall, and belongs to the technical field of unmanned aerial vehicle control. Comprising the following steps: acquiring aircraft parameters related to an angle of attack, acquiring a corresponding maximum head lowering moment according to a starting threshold of an angle of attack limiter, and acquiring an actual crossing angle of attack according to the maximum head lowering moment; designing an attack angle integral formula according to the pitch axis mass inertia moment, the wing area, the average aerodynamic chord length and the inching pressure, and calculating an expected crossing attack angle according to the attack angle integral formula; and comparing the difference value between the actual crossing angle of attack and the expected crossing angle of attack with a margin threshold value, and judging whether the angle of attack limiter meets the requirement or not according to the comparison value. According to the method, the attack angle limitation design criterion is designed on the basis of the constraint relation between the maximum head lowering moment curve slope and the zero-crossing attack angle and depending on the most original mechanical equation, evaluation can be carried out only through a few simple parameters of the airplane, universality is achieved, and accurate evaluation is carried out on the layout of a brand-new round of the airplane in multiple states in a short time.
本发明涉及一种规避失速的迎角限制设计方法,属于无人机控制技术领域。包括,获取与迎角相关的飞机参数,根据迎角限制器启动门限获取其对应的最大低头力矩,根据最大低头力矩获取实际穿越迎角;根据俯仰轴质量惯矩、翼面积、平均气动弦长、点动压设计迎角积分公式,根据迎角积分公式计算期望穿越迎角;将实际穿越迎角与期望穿越迎角的差值和余量阈值比对,根据比对大小来判断迎角限制器是否符合要求。本发明基于最大低头力矩曲线斜率与过零迎角的约束关系,依托最原始的力学方程,设计迎角限制设计准则,只需飞机少数几个简单参数即可评估,具有通用性,针对多种状态、短时间内对全新一轮飞机布局作精准评估。
Attack angle limitation design method for avoiding stall
一种规避失速的迎角限制设计方法
2024-05-07
Patent
Electronic Resource
Chinese
IPC: | G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen |
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