The tail rotor keeps yaw in check while a servo-driven elevator takes care of pitch.
该尾桨保持偏航在检查的同时伺服驱动的电梯照顾间距。
Variable speed filling: Servo-driven, variable-speed filling process can achieve sublevel filling, to prevent liquid overflow bottle. 3.
变速灌装：采用伺服驱动，灌装过程可实现分段变速灌装，防止液体溢出瓶口。
On the side of software, we have completed the main program, rotate speed detecting program, PID control program, motor drivers and servo-driven program.
在软件方面，完成了主程序、转速检测程序、舵机驱动程序以及电机驱动程序等的编写。
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