遥控模式下无人机系统纵向飞行品质评定

建立了无人机系统模型,根据通信数据链存在时延、无人机飞行员不能直接感受到无人机的过载信息等特点,参照有人驾驶飞机飞行品质准则,提出了遥控模式下无人机系统纵向飞行品质的评定方法.对某算例无人机系统的纵向短周期飞行品质及驾驶员诱发振荡(PIO,Pilot-induced Oscillations)趋势进行了评定及分析.结果表明:通信数据链对无人机系统的短周期频率、阻尼等特性的影响较小;但是,无人机飞行员在地面控制站遥控操纵无人机时,通信数据链时延会增加无人机系统的延迟时间,导致闭环操纵的短周期飞行品质发生降级,并具有PIO倾向;为避免发生PIO,应避免无人机在遥控模式下执行快速机动飞行任务.

Longitudinal flying qualities evaluation of UAV system in remote mode

The unmanned aerial vehicle (UAV) system model was established. According to the characteristics such as the communication data-link exists time delay, the UAV pilot can not directly feel the UAV g-load, etc, with the reference to piloted aircraft flight quality criterion, a means to evaluate the longitudinal flying qualities of UAV system in the remote mode is proposed.The short-period flying qualities and the pilot-induced oscillations (PIO) tendency of an unmanned aircraft were evaluated. The results show that, the communication data-link has little effect on the short period frequency and damping characteristics of the UAV. However, when the UAV pilot control the aircraft in the ground control station, the data-link delay time increases the equivalent delay time of the UAV system, which result in the closed-loop short-period flying qualities of the UAV system becomes poor, and the UAV has PIO tendency. To avoid the PIO tendency, missions of fast maneuvering flight should be avoid when the UAV was remotely piloted.