Pilotinducedoscillation (PIO) is a kind of aircraft pilot coupling (APC) events with undesired, largescale and oscillatory characters.
驾驶员诱发振荡（PIO）是一类驾驶员不希望出现的人机耦合（APC）现象。
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According to the essence of PilotInducedOscillation (PIO) and the theory of Closed-loop control, the mathematical model of Pilot-Plane system is set up.