In the direct numerical control system of the computer, PID controller is realized by the PID controlling algorithm procedure.

在计算机直接数字控制系统中，PID控制器是通过计算机PID控制算法程序实现的。

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Compare with fuzzy control system design, it does not require human direct experience of controlling an object to be controlled as well.

与模糊控制相比，不需要人类直接控制被控对象的经验。

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By test and analysis, the direct reasons leading to failures are the defaults in designing coiler mandrel diameter change and controlling hydraulic system program but not the system parts themselves.

通过测试与分析，排除了液压系统元件本身的问题，认为卷筒变径设计缺陷和液压系统程序控制缺陷是故障产生的直接原因。

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