无人机垂直突风非线性动态过程建模与仿真

在无人机方案设计初期,需对气动关键参数进行数字仿真,以验证其能否适应复杂气象条件。为研究无人机在遭遇垂直突风时,其相关参数的动态响应情况,基于simulink建立了数字飞机模型及突风模型,完成了90s的飞行仿真。结果表明,无人机在地轴系Z向遭遇风速为50ms/s时长2s的垂直突风时,其飞行高度、速度等参数均在设计范围内波动,在突风消失后,飞机恢复稳定状态。为后期的系统设计和飞行试验奠定良好的基础。

Simulation of Longitudinal Gust Nonlinear and Dynamic Processfor UAV

In order to validate UAV whether or not could be adapted for complex meteorology, the key aerodynamic parameters must be simulated on initial stage of conceptual design. To research dynamic response of partial parameters, when UAV encountered longitudinal gust, numerical aircraft and wind field model were established. Flight simulation was lasted 90 seconds and accomplished at the end. The result shows that, the fluctuations of aerodynamic parameters are acceptable, and the stability comes back after longitudinal gust vanish. The simulation will be beneficial to system design and flight test on the later stage.