所提出的模糊递推积分PI控制算法还可以对周期性的被控量实现无静差控制，如交流电机的闭环控制。
The proposed recursive integral PI algorithm can also be applied to the control of periodic reference current with zero steady-state error, such as sin AC drive control.
通过调整屏幕结构，图像上的周期性条纹可减到最小，从而得到无莫尔条纹的屏幕。
By modifying the screen configuration, the periodical fringes on images were minimized thus, achieving a Moire free screen.
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