基于三维重建飞机气动特性的飞行包线

Study of Flight Envelope Based on Three-Dimensional Reconstruction of Aircraft Aerodynamic Characteristics

为了确定未知飞机的飞行边界,提出了一种通过逆向三维建模进行气动特性分析后建立基本飞行包线的方法,对气动参数未知飞机的飞行安全和空战仿真问题提供了技术支撑。首先,综合运用明暗恢复图像和工程图重建法对飞机的几何外形进行了三维重建;然后通过数值模拟计算的方法计算并分析了其纵向气动特性;最后,计算了飞机的基本飞行包线并进行了对比验证。研究结果表明,所做工作探索出了一条研究外军缺乏气动参数飞机飞行性能的完整技术途径,所计算的飞行包线具有较高的可靠性,能够体现飞机的飞行性能。

In order to determine the flight boundary of unknown aircraft,a method of analyzing the aerodynamic characteristics through reverse 3d modeling and establishing a basic flight envelope is proposed,providing a technical support for the flight safety and air combat simulation of the aircraft with unknown aerodynamic parameters.Firstly,the 3d reconstruction of aircraft geometry is made by means of light and dark restoration image and engineering map reconstruction.And then the longitudinal aerodynamic characteristics are calculated and analyzed by numerical simulation.Finally,the basic flight envelope of the aircraft is calculated and verified by comparison.The results show that this complete technical approach is in support of studying the flight performance of foreign aircraft under conditions of lack of aerodynamic parameters,and the calculated flight envelope has a good reliability and can reflect the flight performance of aircraft.