The software comes true the double closed loop regulator, therein the velocity loop is the variable-structure control, and the current loop is the classical PI control.
软件实现了调速系统的双闭环调节，其中速度环采用滑模变结构控制，电流环则是经典的PI控制。试验结果说明该调整系统有较好的动态和静态性能。
The current loop selects and USES PI regulator.
电流调节器选用PI调节器。
The current loop, speed loop and position loop of the system were designed with the help of engineering design method of automation system regulator.
按照自动控制系统调节器的工程设计方法，完成了位置环、速度环、电流环的设计。
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