2 0 09年 5月第16卷第3期控 制 工 程Control Engineering of ChinaM ay 2 0 0 9Vo.l 16, No. 3 c I | : 1671null7848( 2009) 03null0335null03null null l : 2008null04null08; null l : 2008null05null12 : S / null 863 ( 2003AA241160)T e : o ( 1970null), 3 , 2 % , = , p V , 1 V Y T M Y ? aV S e # p a ? e / Z S T bPLC e d ? pHe 肖应旺, 姚美银( 2 = S v 9 , null 528225)K null null null 1 : 针对发酵过程中 pH大滞后和时变性的特点, 提出一种基于 PLC的复合模糊控制算法, 模糊控制器和 PI调节器都通过 PLC来实现, 这样既保留了 PLC控制系统控制灵活a可靠a抗干扰能力强等特点, 又大大提高了控制系统的智能化程度b实践结果表明, 该系统能有效抑制纯滞后的影响, 而且鲁棒性强b1 null o null M : 复合模糊控制; PLC; pH; 发酵 m s | : TP 273null null null null null D S M : AApplication of PLC Compound Fuzzy Control System toFerm entation pH ControlXIAO Yingnullwang, YAO M einullyin( Departm en t of Compu ter E ng ineering, Sou th Ch in a Norma lU n iversity, Foshan 528225, Ch ina)Abstract: A com pound fuzzy control algorithm based on PLC is presen ted to the large hysteretic and diverse characteristics of pH in thecourse of ferm entation. The fuzzy controller and PI ad justor are realized by PLC. It not on ly holds the agile, reliab le pecu liarity and theab ility of antinulljamm ing of PLC control system, but also im proves consumedly the intelligentized level of control system. The practice renullsu lts show that the system can effectively restrain the affect of pure hysteresis and has the strong adaptab ility.K ey words: compound fuzzy contro;l PLC; pH; ferm entation1null null ? V , pH M % ) a ! ? H q b ) 8 V , pH | o , T pH o ) 8 K aS , | M , Y) 8 , . M ) 8 o % , K Y q by N , ? A pHA e b 1 PLCL C ? V ? A pH F 1 ; f ! 2 ADAM 4017 v ADAM 40507 1 v ! 9 B * ? pHe d ; 34 ? 1 PID? pHe ; b 4! 9 B * PLC? e d b ( 4 pH ! T V , D 7 a1 V , Y V M D 7 1 q 7 1 z F , P pH / ! , r e , i pH ! | 4 PLC e Z E b2null pHe Z T |pH + / + :! H ) 8 M , ? V pH C A H M , H M pH d L , T bv M b pH , ? V k T Y y 7 + V b#pH F H , v H C b , V y M 4 b pH v H M d , . d PIDe , B F e 4 Y $ ? e 1 p , e v , H W , e r T bSm ith E % B 5 B r Z E , - 4 $ e 1 , 7 pHe 4 S b e Z z , B # $ e M , y e ? 5 Y 3 5b7 ? PIe b N !9 B FuzzynullPI e , 1 ! 9 X , pH v H Fuzzye , F y Y ; pH l V , 5 M PIe , h , 4 e bM H 9 Y 5 S 1 L C b3null pH FuzzynullPI e d e d , m 1 U bm 1null e d mF ignull 1 The principle plot of com pound fuzzy controlsystemm , PI ? 1 s , FLC e , K e 7 1 b e d , PI e ( YV PLC L C , V A 4 d V L , z e r T b1) PLC e ! 9 null PLC e m , m 2 U bm 2null PLC e mFignull2 The construct plot of fuzzy contro lm , e ; nulle M q ; r ; y ; ke, knulles Y M q y 0 ; ku y 0 ; E, nullE ; U e ; u e b e S # , ! E, nullE, U # 0 , i V / e ? 5 : IF E isx AND nullE