A05B-2518-C302#EGN

　　以上缘由的存在进步了复烤出口水分操控的难度,运用简略的 PID 操控算法进行的闭环操控乃至不能确保体系的安稳,更谈不上操控的精度.有必要凭借抢先的操控理论和算法,一起联络实习情况对其进行操控才干确保操控的质量和精度. PID 算法自身的局限性有许多,不能适用于复烤机操控体系,缘由如下:

　　具有反向特性的非zui小相位体系

　　具有严峻频频搅扰的进程体系

　　多变量强耦合体系

　　带有束缚的操控体系

　　大滞后体系

　　这也是如今无法施行烟叶出口水分闭环操控的缘由.

A05B-2518-C302#EGN

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　　SIMATIC PCS7 SINGLE AS ALREADY ASSEMBLED AND TESTED WITH 4MB RAM MEMORY CARD WITH CPU 414-3, INCL. AS RT PO 100 WITH 1 X CP443-1IE(EX20) FOR CONNECTING TO SYSTEM BUS (FROM V7.1) WITH UR2 (9 SLOTS) ALU RACK WITH 1 X AC 120/230V 10A POWER SUPPLY WITHOUT BA"

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