Vol.2, No 7, 1997 pp. 301 - 314
UDC 62-504
VARIABLE STRUCTURE SYSTEMS OF QUASI RELAY
TYPE WITH PROPORTIONAL-INTEGRAL ACTION
Čedomir Milosavljević
University of Niš, Faculty of Electronic Engineering
Abstract. Three variants of using the proportional-integral action
in the variable structure systems of quasi relay type are considered in
this paper. Their characteristics in respect to reaching and sliding
mode conditions, accuracy in the steady-state, forms of produced control
signals, its influence to chattering generation as well as capabilities
of load disturbance rejection are analyzed. Some examples which satisfy
theoretical conclusions are given.
Key words: Automatic control, nonlinear systems, variable structure
systems, sliding mode, proportional-integral action.
SISTEMI PROMENLJIVE
STRUKTURE KVAZI-RELEJNOG TIPA SA PROPORCIONALNO-INTEGRALNIM DELOVANJEM
Razmatraju se tri varijante primene proporcionalno-integralnog
delovanja u sistemima promenljive strukture sa kvazi-relejnim zakonom
upravljanja. Analiziraju se njihove karakteristike u pogledu uslova nastanka
i održanja kliznog režima, tačnosti u stacionarnom stanju, oblika signala
upravljanja koji generišu na ulazu objekta upravljanja, njegov uticaj na
pojavu kliktanja, kao i mogućnosti rada u uslovima delovanja opterećenja.
Daju se primeri koji potvrđuju teorijske zaključke.
