论文部分内容阅读
根据飞行仿真、控制律设计等应用需求,采用有理谱法建立了基于大气紊流Von Karman模型的有理式模型结构。对不同阶次有理式模型精度的对比分析研究表明,五四模型在整个频率范围内更为接近Von Karman模型。采用五四模型可更为精确地反映大气紊流高频特性对弹性飞行器运动及弹性振动特性的影响,并将五四模型应用于飞行仿真,分析了大气紊流对飞机纵向运动的影响。研究结果表明,该模型具有工程实用性。
According to the application requirements of flight simulation and control law design, rational model structure based on atmospheric turbulence Von Karman model is established by using rational spectrum method. The comparative analysis of the accuracy of different order rational models shows that the May Fourth model is closer to the Von Karman model in the entire frequency range. The May Fourth model can more accurately reflect the influence of high frequency of atmospheric turbulence on the motion and elastic vibration characteristics of the flexible aircraft. The May Fourth model is applied to the flight simulation, and the influence of atmospheric turbulence on the longitudinal motion of the aircraft is analyzed. The results show that the model has engineering practicability.