无人机空中加油自主会合制导律研究

Design of UAV Autonomous Guidance Law for Rrendezvous in Aerial Refueling

典型的自主会合制导律主要包括基于在线估计的制导律和无需在线估计的制导律两大类,其中在线估计具有计算量大,实现复杂的缺点。提出了一种无需在线估计的制导律,在此基础上,文章进行了改善,一是借鉴导弹中的带落角约束的比例导引律,实现了一种同时满足航向和纵向自主会合要求的制导律形式,简化了制导律设计;二是引入了相对距离反馈与速度反馈进行相对距离控制,避免了速度控制指令设计的复杂化和开环控制鲁棒性差的缺点。最后,通过一个仿真例子证明了这种制导律方案原理可行,具有一定的工程应用价值。

Typical autonomous guidance law for rendezvous in aerial refueling includes two kinds of guidance laws, one is based on estimate online, and the other isn＇t need. Between the two kinds of guidance laws, the guidance law of esti- mate online has a disadvantage of abundant calculating and complex realization. A kind of guidance law without estimate online is given in a reference. Based on it, improved work is carried out in the article. Firstly, a kind of guidance law sat- isfied autonomous rendezvous demands of pitch and yaw channels is accomplished. Secondly, the feedback of relative distance and speed is used for relative distance control in order to avoid the disadvantage of complex speed control de- sign and poor robust performance of open-loop control. Finally, the guidance law scheme given in the article is proved to be reasonable with a simulation example.