无人机制造外形气动偏差评估方法  

Evaluation Method of UAV Manufacturing Deviation on Its Aerodynamic Characteristics

作　　者：包晓翔[1] 孙凯军[1] 付义伟[1] Bao Xiaoxiang;Sun Kaijun;Fu Yiwei(Cai Hong Unmanned Aerial Vehicle Technology Co.,Ltd.,China Academy of Aerospace Aerodynamics,Beijing 100074,China)

机构地区：[1]中国航天空气动力技术研究院彩虹无人机科技有限公司,北京100074

出　　处：《航空工程进展》2018年第4期501-505,共5页Advances in Aeronautical Science and Engineering

摘　　要：气动外形对无人机起着至关重要的作用,有必要对其制造外形的气动偏差进行评估。利用数字摄影测量系统获得无人机制造外形的点云数据;以机头为参考点,将测量点云数据模型与理论模型的坐标系重合,对比重合度并统计无人机制造外形与理论外形的几何偏差分布;根据点云数据进行逆向建模,获得无人机制造外形的三维模型;对无人机理论外形进行CFD计算,与其风洞试验数据进行对比,通过调整网格及计算方法,得到与试验数据相吻合的CFD计算方法;以此方法计算得到无人机制造外形的气动数据,并与无人机的理论气动力进行对比。结果表明:此评估方法能够定量地评估外形制造偏差对无人机气动特性的影响。Aerodynamic shape is very important to UAV.It is necessary to estimate UAV manufacturing deviation on its aerodynamic shape.The point cloud data of manufacturing shape of UAV can be measured by digital photogrammetric system.With the reference of nose,geometric deviation distribution statistics of the UAV can be obtained by the coordinate system of the point cloud model overlapping with the theoretical UAV model.Based on the cloud point,the three-dimensional model of manufacturing shape can be constructed by reverse modeling.The method that matches the test data can be obtained by comparing CFD calculation of the theoretical UAV with the wind tunnel test data by adjusting the grid and method of calculation.Aerodynamic data of the manufacturing shape can be obtained by using the same calculation method to compare with the aerodynamic force of theoretical shape.Result shows that aerodynamic characteristics of the UAV manufacturing deviation can be quantitatively estimated.

关 键 词：无人机 气动外形 制造偏差 数字摄影 CFD 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]