VTOL aircraft is an under-actuated system with three degrees of freedom and two control inputs.

VTOL空间飞行器是具有三个自由度，两个控制输入的欠驱动系统。

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VTOL aircraft is an under-actuated system with three degrees of freedom and two control inputs.

VTOL空间飞行器是具有三个自由度，两个控制输入的欠驱动系统。

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