Điều khiển số các quá trình công nghệ

NGHIEN cufu - TRAO D6\

^"^ ^ - it ^ f DIEU KHIEN SO CAC QUA TRINH CONG NGHE

TS. Dinh Vdn Thdng

Bp mdn Ky thudt Di|n - Di|n tfl, Trfldng Dai hpc Md - Dia chdt

TOMTAT

Ky thudt mdy tinh trong tU dgng diiu khiin Id mdt trong nhUng ddc diim quan trgng trong nin

sdn xudt cdng nghiep hiin dgi ngdy nay. Cdc linh viic sdn xudt cdng nghiip, giao thdng vdn tdi, hi thdng

thdng tin truyin thdng vd qudn ly bdo vi mdi trUdng todn cdu, phu thudc vd liin quan mdt thiet vdi hi

thdng mdy tinh diiu khien. Ngdy nay, diiu khien sd dUdc dp dung rdt phd biin trong cdc qud trinh cong

nghe, nd dan thay thi cho cdc hi diiu khiin tUdng tU trUdc ddy do nhiing Uu thivUdt trdi vikhd ndngxH

ly, do mim deo vd tinh linh hogt trong dHu khien cua no. Bdi bdo trinh bdy nhitng ndi hdm vd nguyin tdc

diiu khien sd cdc qud trinh cdng nghe vd phdn tich ddc thu cua hi thdng diiu khien sd cdc qud trinh cong

nghi hiin nay.

ABSTRACT

Computer engineering in automatic control is one important feature of the modem industrial

production today. The field of industrial production, transportation, information systems - communication

and management of environmental protection and global dependence correlated with computer-controlled

system. Today, digital control is applied is very popular in the technological process, it gradually replaces

the analog control system previously dominated by the superior processing power, flexibility and versatility

in its control. This paper presents the internal control functions and principles of the technological procex

and analyze the characteristics of the control system of the present technology.

1. Md DAU dd cd cd cdc mdy tinh di|n cd nhan PC) gifl vai tro

mau chdt vd quan trpng [1,2,4,5].

0ng dung ky thudt tinh trong tfl dpng

dilu khiln Id mpt trong nhflng dac dilm quan Di hinh dung dflpc vai trd ddc bilt quan

trpng bdc nhdt trong nln cdng nghi|p hi|n dad trpng cua mdy tinh di|n tfl trong dilu khiln cac

ngay nay Cdc linh vflc cdng nghiep, giao thdng qud trinh, can xdc dinh chinh xdc khdi nilm thu|t

van tai, he thdng thdng tin truyin thdng vd qudn ngfl "qua trinh". Ban chat vat ly cua qud trinh, do

ly bao vl mdi trfldng todn cau phu thupc vd liln la sfl luan chuyin lien tiep cdc trang thai ciia doi

quam mat thilt vdi he thdng may tinh dilu khiln. tflpng ndo dd trong vat ly tfl nhien. Qud trmh dildc

Thflc tien d cac qudc gia cd nln khoa hpc ky thuat hilu theo nghia tren cd y nghia la sfl van ddng, cac

phat triln chi ra rang, hau hit cdc he thdng ha phan flng hod hpc hay qua trinh trao ddi nhiet. Vi

tang ky thuat tfl giao thdng van tai dfldng sat din dy diln hinh cua qud trinh nhfl: chuyin ddng ciia

van hdnh dilu khiln Id phan flng dien hat nhan cdc phfldng tien giao thdng, dfldc thi hiln qua

khdng thi thilu he thdng dilu khiln du thd sd sfl thay ddi tdc dp vd vi tri cua nd la cdc d?i lfldng

hay hien dai. He thdng may tinh di|n tfl sd (trong cd thi dilu khiln dfldc; qud trinh sdn xuat c6ng

TAP CHf CO KHf VlfiT NAM • S6 03 (Thang '1A1'>\