文中根据经典控制理论，采用电流、速度、位置三环控制作为系统控制策略。

According to classical control theory, using current, speed and position control as a three-ring system control strategy.

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采用以系统分析、全过程控制为核心的“三环一点”的思路，设计了厦门市鼓浪屿区的垃圾分类方案。

Based on the idea of "three rings for one dot" whose key point is system analysis and whole process control, the refuse classification plan for Gulangyu District in Xiamen City was proposed.

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系统采用位置、速度和电流环三环控制，并结合空间矢量脉宽调制（SVPWM）算法。

The servo control system combines position loop, speed loop, current loop with algorithm of space vector pulse width modulation(SVPWM).

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