Transactions on Control, Automation and Systems Engineering

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Nonlinear Observer flay Applications of Fermentation Process in Stirred Tank Bioreactor

  • Kim, Hak-Kyeong (Dept. of Mechanical Eng., College of Eng., Building 9, Pukyong National University) ;
  • Nguyen, Tan-Tien (Dept. of Mechanical Engineering, Hochiminh City University of Technology) ;
  • Kim, Sang-Bong (Dept. of Mechanical Eng., College of Eng., Building 9, Pukyong National University)
  • Published : 2002.09.01
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Abstract

This paper proposed a modified observer based on Busawon's high gain observer using an appropriate time depended function, which can be chosen to make each estimated state converge faster to its real value. The stability of the modified observer is proved by using Lyapunov function. The modified nonlinear observer is applied to estimate the states in stirred tank bioreactor: out-put substrate concentration, output biomass concentration and the specific growth rate of the process. The convergences of the modified observer and Busawon's observer are compared trough simulation results. As the results, the modified observer converges faster to its real value than the well-known Busawon's observer.

Keywords

References

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