升力风扇无人机动力补偿系统设计与分析

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

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。

The lift-fan UAV is of unique power system, which is very important for 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 is established and simplified. Then the basic control structure of power compensator is built. Finally, aiming at the characteristic of lift-fan UAV, the power compensator system integrating various compensators is established, and this system is simulated and analyzed. The result indicates that the simulation response time in the power compensator system with the constant angle of attack is shorter than the constant airspeed. However, the damping which can cause oscillation is deficiency. In order to alleviate the oscillation, 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 the states of aircraft movement with the compensation are good, and the tracking precision of the attitude angle and flight path angle is efficiently increased.