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现代电传飞行控制系统中由于作动器速率饱和产生的突然的附加相位滞后以及系统操纵增益的降低,是触发Ⅱ型PIO的主要原因,对此通常采用相位补偿的方法进行抑制。为研究补偿器的抑制效能,建立了非线性的人机闭环系统模型。在分析基于反馈结构的RLF补偿器频域特性及其相位补偿能力的基础上,采用离散俯仰跟踪任务与正弦跟踪任务在时域内仿真研究了补偿器对Ⅱ型PIO的抑制效能。仿真结果表明,RLF补偿器可以有效抑制Ⅱ型PIO,经地面飞行模拟器进一步验证,表明补偿器明显改善了飞机飞行品质,可以用于Ⅱ型PIO的抑制。
Modern fly-by-wire flight control system due to the saturation rate of the actuator due to the sudden additional phase lag and the system to reduce the gain control is triggered Ⅱ PIO the main reason for this is usually phase compensation method to suppress. To study the compensating efficiency of the compensator, a nonlinear human-machine closed-loop system model is established. Based on the analysis of the frequency domain characteristics and the phase compensation ability of the RLF compensator based on the feedback structure, the compensating performance of the compensator on the type II PIO is simulated in the time domain using the discrete pitch tracking task and the sinusoidal tracking task. The simulation results show that the RLF compensator can effectively suppress Type II PIO and further verified by the ground flight simulator, indicating that the compensator significantly improves the flight quality and can be used to suppress type II PIO.