用实物观测、理论分析和数值模拟三者相结合的方法，研究典型昆虫在不同速度下前飞时的翅膀拍动运动学，气动力机制与能耗，及飞行动稳定性与控制。主要研究内容为：1)在风洞中定量测量翅膀的拍动频率、幅度、几何攻角等运动学参数，给出这些参数随前飞速度的变化规律；2)基于N-S方程数值解和涡动力学分析，探讨前飞气动力机制和能耗随飞行速度的变化规律；3)基于Floquet理论和"平均模型"理论，研究飞行的动稳定性，探讨稳定性特性随飞行速度的变化规律；4)研究飞行的控制特性(包括可控性，增稳控制，及改变飞行速度的控制)，探讨其中的空气动力学、动力学和控制原理。研究结果可为研制微型飞行器提供新概念和新原理，可增加人们对自然界的了解。

The proposed project studies the flapping kinematics, aerodynamics and flight mechanics of representive insects in forward flight, using an approach that combines experimental observation and measurement, theorectical analysis and numerical simulation. The following items will be investigated: (1) measure wing-flapping parameters (flapping frequency, amplitude, wing angle of attack, etc.) in wind tunnel, at various flight speeds. (2) Based on numerical solutions of Navier-Stokes equations and vorticity dynamics theory, study the forward flight aerodynamic mechanisms and how power requirment changes with flight speed. (3) Based on the Floquet theory and averaged-model theory, analyse the dynamic flight stability and examine how flight stability changes with flight speed. (4) study flight control properties, including controlability, stabilization control, control from one flight speed to another. The study has potential applications in the development of micro-air-vehicles, and its results will also be very useful to biologists who study insects' comparative biology, neuro-biology, behavior, evolution, etc.