直升机着舰纵向下滑控制系统仿真研究

Simulation research of longitudinal glide-down control system about helicopter deck landing

采用 L QG/ L TR方法设计了直升机着舰纵向下滑控制系统 ,其中包括建立直升机增广系统的数学模型 ,确定控制器的频域范围鲁棒性边界条件 ,反馈回路的设计和回路传递函数在输出端的恢复。在给出该控制系统仿真框图的基础上 ,利用仿真软件进行数字仿真。最后 ,对仿真结果中直升机高度、速度随机 -舰距离和时间的变化曲线进行了分析 ,得到了一些有工程应用价值的研究结果。

Longitudinal glide down control system of helicopter is designed by linear quadratic gaussian /loop transfer recovery(LQG/LTR), which include establishment of helicopter and augmented system model, attainment of frequency domain robustness bounds, design of feedback loop and recovery of loop transfer at the output. On the basis of this control system, simulation software is used to perform numerical simulation. Finally, some results with engineer value have been gotten through analysis on the change curves of helicopter's altitude and velocity with helicopter ship distance and time.