机翼摇晃预测与抑制

 将分支分析与突变理论方法(BACTM)和模糊逻辑控制(FLC)方法相结合,形成BACTM-FLC方法,实现飞机大迎角下的动力学特性分析和模糊控制律设计一体化。在对某大后掠角三角翼的非线性动力学特性进行预测分析的基础上,设计了模糊控制器抑制机翼摇晃,用BACTM对该模糊控制器的控制效能进行评估分析,并对BACTM的预测与评估结果进行了仿真验证。结果表明,BACTM-FLC方法可以全局性地预测和分析飞机的大迎角非线性动态特性,并对其进行有效控制。

Prediction and Suppression of Wing-Rock

The bifurcation analysis and catastrophe theory methodology-fuzzy logic control(BACTM-FLC) method is developed from bifurcation analysis and catastrophe theory methodology and fuzzy logic control. It integrates the analysis of nonlinear dynamics and the design of fuzzy control law at high-angle-of-attack of aircraft.After the nonlinear dynamical characteristic analysis and prediction of a big sweepback delta wing by BACTM, a fuzzy controller is designed to suppress the wing-rock and its control efficiency is also estimated by BACTM.Finally, the prediction and design results are validated by the numerical simulations.It turns out that BACTM-FLC is able to effectively predict and control the global nonlinear dynamical characteristics of aircraft at high-angle-of-attack.