Cov kab ntim tau muab cais raws li cov yam ntxwv ntawm cov tshuaj tiv thaiv.
Ntim los ua ke kab nruam tswj qhov system.
Cov tsis muaj nyob rau hauv qhov kev hloov pauv tsis tu ncua, uas yog, qhov system lub teeb liab kis tau tus mob thiab cov lus teb ntawm cov khoom raug tswj yog ib qho tsis muaj kev cuam tshuam tsis tu ncua los yog analog kom muaj nuj nqis.Yav dhau los hais txog qhov kub thiab txias tswj, lub cev muaj zog tswj lub cev muaj zog yog kev tswj xyuas tas li.Raws li kev sib raug zoo ntawm cov zis ntau thiab cov input kom muaj nuj nqis, qhov system tuaj yeem muab faib ua.
Ntim linear tswj system muaj xws li linear Cheebtsam, txhua qhov txuas tuaj yeem piav qhia los ntawm qhov sib npaug ntawm cov kab sib txawv kom ua tiav lub hauv paus ntsiab lus ntawm superposition, uas yog, thaum muaj ntau yam perturbations lossis kev tswj hwm ua rau lub kaw lus tib lub sijhawm, tag nrho cov txiaj ntsig yog sib npaug. sum ntawm cov teebmeem tshwm sim los ntawm txhua tus neeg ua haujlwm.
Ntim los ua ke kab uas tsis yog-linear tswj system nyob rau hauv ib co kev sib txuas nrog saturation, tuag cheeb tsam, kev sib txhuam thiab lwm yam non-linear yam ntxwv, xws li systems yog feem ntau piav qhia los ntawm non-linear sib npaug sib npaug, tsis ua raws li lub hauv paus ntsiab lus ntawm superposition.
Ntim kab intermittent tswj system
Intermittent control systems, tseem hu ua discrete control systems, qhov twg cov teeb liab sab hauv ntawm lub kaw lus tsis sib xws, tuaj yeem muab faib ua.
(1) Sampling control systems yog characterized by sampling devices that sample the nruam analogue quantities are controled of a certain zaus thiab xa cov digital quantities to a computer or CNC device.Tom qab ua cov ntaub ntawv los yog manipulation, cov tswj commands yog tso zis.Cov khoom tswj tau yog tswj los ntawm kev hloov cov ntaub ntawv digital rau hauv cov ntaub ntawv analogue.Qhov piv txwv zaus yog feem ntau siab dua qhov zaus ntawm kev hloov ntawm cov khoom.
(2) Lub kaw lus tswj ntawm kev hloov pauv kev tswj hwm muaj cov khoom hloov pauv.Raws li cov kev hloov pauv tsuas yog "ON" thiab "OFF" hauv ob lub xeev sib txawv, lawv tsis txuas ntxiv cuam tshuam txog kev hloov pauv ntawm cov teeb liab tswj thiab yog li kev tswj tau los ntawm lub kaw lus yuav tsum tsis tu ncua.Common relay contactor control systems, programmable controller systems, etc. yog switching control systems.Muaj ob hom kev tswj kev hloov pauv: qhib-voj thiab kaw-voj.Qhib-loop switching tswj txoj kev xav yog ua raws li kev xav algebra.
Nrog rau kev nce hauv automation ntawm ntim cov kab sib dhos, kev ua haujlwm, kev saib xyuas thiab kev tu lub sijhawm ntawm cov tshuab ntim khoom thiab cov khoom siv tau yooj yim dua thiab yooj yim, txo cov kev txawj ntse ntawm cov neeg ua haujlwm.Qhov zoo ntawm cov khoom ntim yog ncaj qha ntsig txog qhov kub thiab txias, qhov tseeb ntawm tus tswv tsev ceev, kev ruaj ntseg ntawm kev taug qab qhov system, thiab lwm yam.
Kev taug qab qhov system yog lub hauv paus tswj hwm ntawm cov raj xa dej.Ob txoj kev taug qab nyob rau hauv pem hauv ntej thiab nram qab kev taw qhia yog siv los txhim kho kev taug qab qhov tseeb.Tom qab lub tshuab ua haujlwm, zaj duab xis cim sensor tas li pom cov cim zaj duab xis (xim coding) thiab cov microswitch mus txog qhovtwg hauv cov tshuab ntsuas qhov chaw ntawm lub tshuab.Tom qab qhov kev zov me nyuam tau khiav lawm, ob qho tib si ntawm cov teeb liab no raug xa mus rau PLC.Cov zis ntawm PLC tswj qhov zoo thiab qhov tsis zoo ntawm kev taug qab lub cev muaj zog, uas tam sim ntawd tshawb pom qhov tsis raug ntawm cov khoom ntim khoom thaum lub sijhawm tsim khoom thiab ua kom raug them nyiaj thiab kho kom tsis txhob khib nyiab ntawm cov khoom ntim.Yog tias cov kev cai tsis tuaj yeem ua tiav tom qab taug qab cov sijhawm ua ntej, nws tuaj yeem nres thiab tos rau kev tshuaj xyuas kom tsis txhob tsim cov khoom pov tseg;vim qhov kev coj ua ntawm kev tswj hwm kev hloov pauv ceev, cov saw tsav tau txo qis heev, uas txhim kho kev ruaj ntseg thiab kev ntseeg siab ntawm lub tshuab thiab txo cov suab nrov ntawm lub tshuab.Nws ua kom muaj kev siv thev naus laus zis siab hauv lub tshuab ntim khoom, xws li kev ua haujlwm siab, kev poob qis thiab kev tshuaj xyuas tsis siv neeg.
Txawm hais tias daim ntawv thov kev ua haujlwm ntawm lub tshuab tsav siv rau ntawm lub tshuab ntim tsis siv neeg thiab cov kab sib dhos yog qhov yooj yim, nws tso siab rau qhov kev ua tau zoo ntawm kev sib kis, uas yuav tsum tau ua kom nrawm nrawm nrawm thiab nrawm nrawm nrawm.Yog li ntawd, nws yog ib qho tsim nyog yuav tau xav txog cov kev qhia tshwj xeeb ntawm cov zaus hloov pauv thiab xaiv qhov kev ua haujlwm siab, ntau yam thiab zoo hloov pauv kom ua tau raws li qhov yuav tsum tau muaj ntawm cov khoom ntim khoom ntim ceev ceev.
Post lub sij hawm: Lub Xya hli ntuj-22-2021