降低主机转速是船舶普遍采用的节能措施。
Reducing rotational speed run of main engine is generally used for a method of economizing in energy resources on board.
采用变频方式调节主机转速，以求最佳的线速度，效果更理想。
Host speed regulator with frequency converter means, in order to best speed, the effect better.
着重分析了MG-800电子调速器系统中的数字PID控制算法，详细给出算法中三个参数的设置规则和参考设定值，同时分析了不同的参数值对于主机转速的影响。
It importantly analysis the digital PID Control Arithmetic in NABCO MG-800 Govemor. The set rule of three parameter is gived. The value of parameter will make what affection to engine revolution.
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