【摘要】 固定翼微型飞行器(MAV)受尺寸限制一般采用飞翼布局，因尾力臂较短，需较大尺寸的舵面以产生足够的操纵力矩，其偏转会影响整个翼面的流场;同时配平状态下的舵偏角度又受纵向静稳定性的影响，因此舵面尺寸与纵向静稳定性将共同对MAV气动特性产生不可忽视的影响。对此提出了一种研究舵面尺寸与纵向静稳定性对MAV气动特性影响的计算方法。基于CFD结果对不同迎角下的特定舵面尺寸与纵向静稳定性的MAV进行纵向配平，并对比得到当前状态下的最大升阻比，通过依次改变舵面尺寸与纵向静稳定性并重复上述过程，最终获得气动特性的变化规律。结果表明，放宽静稳定性与选择合适的舵面尺寸可分别使得升阻比提高约10%与4%。更多还原

【Abstract】 Fixed-wing Micro Air Vehicle( MAV) generally adopt the flying wing due to the size limitations. Because of the short tail moment arm,a relatively larger control surface is required to generate the sufficient control moment. The deflection of the control surface will affect the flowfield of the entire wing.At the same time,the deflection angle of the control surface in the trimmed state is affected by the longitudinal static stability. Therefore,the size of the control surface and the longitudinal static stability will jointly have a non-negligible impact on the aerodynamic characteristics of the MAV. This paper proposes a calculation method to research the influence of the control surface size and the longitudinal static stability on the aerodynamic characteristics of the MAV. Firstly,based on the computational fluid dynamics results,the MAVs with specific control surface sizes and longitudinal static stability under different angles of attack are longitudinally trimmed. Then,the maximum lift drag ratio in the current state is obtained through comparison. By successively changing the control surface size and the longitudinal static stability then repeating the above process,the variation law of the aerodynamic characteristics is finally obtained.The results show that,theoretically,relaxing the static stability and selecting an appropriate control surface size can increase the lift drag ratio by approximately 10% and 4%,respectively.更多还原