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FWB、DS、DASA、RLF作为4种成熟、有效的非线性滤波器均用于解决以作动器速率饱和为特征的Ⅱ型驾驶员诱发振荡(PIO)相位滞后的问题,从而抑制PIO发生.借助描述函数理论,对各滤波器中非线性环节线性化处理,得到4种滤波器拟线性传递函数和相频特性曲线,研究、比较各滤波器在不同参数、不同输入条件下开环相位补偿能力.针对俯仰PIO问题,选取本机动态特性较差、易发生PIO的纵向飞机模型,构建带速率限制作动器的人机闭环系统,通过3个典型的俯仰飞行仿真任务,从抑制作动器速率饱和能力、俯仰响应特性、相位补偿能力、减轻驾驶员操作负担4个方面全面比较各滤波器性能.实验表明:DASA滤波在抑制PIO、改善飞机俯仰响应特性方面相对较优.实验结果为滤波器设计、俯仰PIO抑制的相关研究提供有益参考.
FWB, DS, DASA and RLF are all four mature and effective non-linear filters to solve the phase-induced driver induced oscillation (PIO) phase lag, which is characterized by the saturation of the actuator speed, so as to suppress the occurrence of PIO. With the aid of descriptive function theory, the nonlinearity of each filter is linearized and four kinds of filter quasi-linear transfer function and phase-frequency characteristic curve are obtained, and the open-loop phase compensation of each filter under different parameters and different input conditions is compared Ability.For the pitch PIO problem, this paper chooses a longitudinal aircraft model with poor dynamic characteristics and prone to PIO, constructs a human-machine closed-loop system with a rate-limited actuator, and through three typical simulation missions of pitching flight, Filter speed saturation ability, pitch response characteristic, phase compensation ability and reduce driver’s operating burden are compared in four aspects.The experiments show that DASA filtering is relatively better in suppressing PIO and improving the pitch response characteristics of the aircraft.The experimental results are as follows: Filter design, pitch PIO suppression related research provides a useful reference.