升力风扇无人机动力补偿系统设计与分析

升力风扇无人机具有独特的动力系统,对升力风扇无人机着陆过程的动力补偿系统的设计与分析显得尤为重要。建立升力风扇无人机纵向状态方程并进行简化,在此基础上构建动力补偿控制基本结构,针对升力风扇无人机的特点建立多种补偿相结合的动力补偿系统并对其进行仿真分析,表明迎角恒定的动力补偿系统比速度恒定的动力补偿系统响应时间短,但是存在阻尼不足的问题。针对阻尼不足造成的震荡问题,结合升力风扇无人机自身的特性进行纵向过载的反馈以及在扰流片参与下的动力补偿,结果表明补偿后的飞机运动模态阻尼良好,有效地增加了航迹角对姿态角的跟踪精度。

Design and Analysis of the Approach Power Compensator System of Lift-fan UAV

To solve the problem of power compensator for lift-fan UAV, this paper focuses on the design and analysis of the power compensator system during the landing process of lift-fan UAV. Firstly, the longitudinal state equation of lift-fan UAV was established and simplified. And then, the basic control structure of power compensator was built. Finally, aiming at the characteristic of lift-fan UAV, the power compensator system integrating various compensators was established, and this system was simulated and analyzed. The result indicates that the simulation response time in the power compensator system at the constant speedis shorter than the other.However, the damping which can cause oscillation is deficiency. In order to alleviate the oscillation, subsequently, the longitudinal overloading is analyzed according to the specific characteristics of lift-fan UAV, and the effect of power compensation with spoiler is also researched. The results show that modes of aircraft are goodand effectively increase the tracking precision of the attitude angle of flight path angle.