引用本文:张连华,王京,石宗英,钟宜生.基于光流的四旋翼直升机鲁棒自主着陆控制[J].控制理论与应用,2016,33(11):1492~1500.[点击复制]
ZHANG Lian-hua,WANG Jing,SHI Zong-ying,ZHONG Yi-sheng.Robust autonomous landing control of quadrotor based on optical flow[J].Control Theory and Technology,2016,33(11):1492~1500.[点击复制]
基于光流的四旋翼直升机鲁棒自主着陆控制
Robust autonomous landing control of quadrotor based on optical flow
摘要点击 2666  全文点击 1488  投稿时间:2016-01-26  修订日期:2016-10-11
查看全文  查看/发表评论  下载PDF阅读器
DOI编号  10.7641/CTA.2016.60061
  2016,33(11):1492-1500
中文关键词  无人机  光流  鲁棒控制  自主着陆
英文关键词  unmanned aerial vehicle  optical flow  robust control  automous landing
基金项目  国家自然科学基金项目(61374034, 61210012)资助.
作者单位E-mail
张连华 中国航天员科研训练中心 zhanglh09@mails.tsinghua.edu.cn 
王京 清华大学自动化系  
石宗英* 清华大学自动化系  
钟宜生 清华大学自动化系  
中文摘要
      针对小型四旋翼无人机自主着陆问题, 提出了一种基于光流的高度估计方法和基于信号补偿的高度鲁棒 控制器设计方法. 首先从通用光流运动模型出发, 采用奇异值分解方法求解无人机线速度和深度的比值, 通过对垂 直速度和高度比值积分获得高度数据. 其次, 将考虑地效影响和其它不确定性的高度通道非线性模型分解为标称 线性模型和等效扰动两部分, 并设计基于信号补偿的高度鲁棒控制器, 该控制器由标称控制器和鲁棒补偿器组成, 其中标称控制器使得标称闭环系统达到期望的高度跟踪特性, 鲁棒补偿器用于抑制等效扰动的影响. 最后从理论上 证明了该控制器可以保证高度跟踪误差在有限时间内收敛至指定的原点邻域内. 四旋翼无人机自主着陆的实验结 果验证了所提出的基于光流的高度估计和鲁棒控制方法的有效性.
英文摘要
      For autonomous landing of a small quadrotor, an attitude estimation method is proposed using optical flow, and a robust controller based on signal compensation is designed. Firstly, the ratio of velocity to depth is acquired by singular value decomposition (SVD) from the general optical flow motion model, and the altitude data are obtained by integrating the ratio of vertical speed and altitude. Then, the nonlinear model of the altitude channel is divided into a nominal linear model and an equivalent disturbance considering the influences of the ground effect and other uncertainties. And a robust controller based on signal compensation is designed, which consists of a nominal controller and a robust compensator. The nominal controller is designed for the nominal system to get the desired tracking performance, and the robust compensator is applied to restrain the influence of the equivalent disturbance. Finally, it is proved that the tracking error for the altitude channel can converge to a given neighborhood of the origin in finite time by the robust controller. Landing experimental results for a small quadrotor demonstrate the effectiveness of the proposed altitude estimation method based on optical flow and the robust controller.