Robust Averaging Level Control
2011 (English)Report (Other academic)
Frequent inlet ﬂow changes typically cause problems for averaging level controllers. For a frequently changing inlet ﬂow the upsets do not occur when the system is in steady state and the tank level at its set-point. For this reason the tuning of the level controller gets quite complicated, since not only the size of the upsets but also the time in between them relative to the hold up of the tank have to be considered. One way to obtain optimal ﬂow ﬁltering while directly accounting for future inlet ﬂow upsets is to use closed-loop robust MPC, as proposed here. The behavior of the robust MPC controller differs from earlier proposed level controllers as it does not return the tank level to a ﬁxed set-point following an inlet ﬂow upset. Guidelines on the tuning of the controller is presented and its performance is compared to that of a previously proposed MPC approach.
Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2011. , 10 p.
LiTH-ISY-R, ISSN 1400-3902 ; 3023
Averaging level control, Robust MPC, Surge tanks
IdentifiersURN: urn:nbn:se:liu:diva-97961ISRN: LiTH-ISY-R-3023OAI: oai:DiVA.org:liu-97961DiVA: diva2:650808
FunderSwedish Foundation for Strategic Research