在起落架之后被给予向下并且锁住位置，得到迹象的双起落架控制的飞行机组人员和接口单位(LGCIU)错误。
After the landing gear was extended to the down-and-locked position, the flight crew received indications of dual landing gear control and interface unit (LGCIU) faults.
系统采用电流、速度双闭环控制，电流、速度的调节采用PI调节，转子磁极位置通过霍尔元件检测。
The double close loops of speed and current control is introduced in the system and the PI control is implemented in the current and speed loop, the position of rotor pole is detected by hall element.
采用增量式编码器，通过速度及位置信号进行双闭环控制。
Double closed loop control is implemented with increment encoder through signal of speed and position.
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