Application of super-twisting observers to the estimation of state and unknown inputs in an anaerobic digestion system.
This paper presents the estimation of the unknown states and inputs of an anaerobic digestion system characterized by a two-step reaction model. The estimation is based on the measurement of the two substrate concentrations and of the outflow rate of biogas and relies on the use of an observer, consisting of three parts. The first is a generalized super-twisting observer, which estimates a linear combination of the two input concentrations. The second is an asymptotic observer, which provides one of the two biomass concentrations, whereas the third is a super-twisting observer for one of the input concentrations and the second biomass concentration.
UMONS, Automatic Control Laboratory, 31 Boulevard Dolez, 7000 Mons, Belgium E-mail: MihaelaIuliana.Sbarciog@umons.ac.be.
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M
Sbarciog
UNAM, Coordinación Eléctrica y Computación, Instituto de Ingeniería, 04510 Mexico D.F., Mexico.
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JA
Moreno
UMONS, Automatic Control Laboratory, 31 Boulevard Dolez, 7000 Mons, Belgium E-mail: MihaelaIuliana.Sbarciog@umons.ac.be.
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A
Vande Wouwer
D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*