摘要
直升机是一种比较复杂的飞行器,基于工程需求,直升机机体腹部安装了一个可以打开和收起的外挂部件,该外挂部件的转动会给直升机带来周期性的力和力矩扰动。针对输入扰动响应的特点,提出了抑制扰动的前馈控制方案。详细介绍了前馈控制律的设计思想和基于傅里叶变换的控制信号的提取方法,得到了最终的设计结果并进行了相应的仿真验证。Simulink仿真结果表明,所采用的前馈控制方案能够较好地抑制干扰造成的姿态角波动,证明所提出的控制方案可行且有效,证明了该控制律对外挂部件在任意转速下都能达到较为满意的抗干扰的效果。
Helicopter is a very complicated air vehicle. Based on project requirements,an externally-hung component is in-stalled under the belly of helicopter airframe,of cause,it can be pushed out and pulled in,but its movement imposes a periodic force and moment on the helicopter. Then,a feed-forward control scheme is proposed according to the characteristics of the in-put disturbance responses. The design concept of the feed-forward control law and method of control signal extraction based on Fourier transform are explicated in detail in this thesis. The digital simulation was performed to confirm its control effects. Simu-link simulation results indicate that the feed-forward control scheme can restrain the attitude angle fluctuations caused by the in-terference,and the proposed control scheme is feasible and effective. Moreover,the designed control law can achieve a satisfac-tory anti-jamming effect at any rotation speed.
出处
《现代电子技术》
2013年第21期113-116,共4页
Modern Electronics Technique
关键词
直升机
外挂部件
前馈控制
傅里叶变换
helicopter
externally-hung component
feed-forward control
Fourier transform
