论文部分内容阅读
无人机作为航空飞行器的一种,具有诸多应用价值,精确的航迹跟踪是其完成飞行任务的必要条件。在无人机飞行控制系统的制导外回路,实现一种具有抗风性能的横向非线性制导算法(NLG),基于航迹参考点实时测算无人机侧向加速度,并根据无人机力学方程得到滚转角指令,实现无人机的航迹跟踪。该制导算法只需确定合适的距离参数L,即可实现较为精确地制导,加入反馈环节以得到改进的闭环非线性制导算法。在侧风条件下进行仿真分析,结果表明:改进后的非线性制导算法是正确的,其具有良好的抗风性能。
As a kind of aviation vehicle, UAV has many application values. Accurate track-following is a necessary condition for its mission. In the guided outer loop of the UAV flight control system, a horizontal nonlinear guidance algorithm (NLG) with wind resistance is realized. The unmanned aerial vehicle lateral acceleration is calculated based on the track reference point. According to UAV mechanical equation Get roll angle command, to achieve UAV track. The guidance algorithm needs only to determine the appropriate distance parameter L, which can lead to more accurate guidance and join the feedback loop to obtain an improved closed-loop nonlinear guidance algorithm. The simulation results show that the improved nonlinear guidance algorithm is correct and has good wind resistance.