Sánchez-Torres, Juan D.Jiménez-Rodríguez, EstebanIsaza, Jhon A.Botero-Castro, Héctor2017-10-262018-04-282017-10-18J. D. Sánchez-Torres, E. Jiménez-Rodríguez, J. A. Isaza and H. Botero-Castro (2017). An Equivalent Control Based Observer for Biomass in a Batch Process. 3rd IEEE Colombian Conference on Automatic Control, Cartagena de Indias, Colombia. https://rei.iteso.mx/handle/11117/5032http://hdl.handle.net/11117/5032In this paper a sliding-mode observer for a batch bioprocess, the d-endotoxins production of bacillus thuringiensis (BT), is presented. The proposed observer is based on the equivalent control method and a class of second-order sliding mode operators. The use of these operators in the observer design allows the fixed-time convergence of the measured variables, while the unmeasured variables converge exponentially. This structure allows to estimate the biomass in the d-endotoxins production of BT, even, under noisy measurement conditions. Simulations show the feasibility of the proposed observer. Convergence proofs are also presented.engState observersChemical processinfo:eu-repo/semantics/conferencePaper