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On estimation of unknown state variables in wastewater systems | IEEE Conference Publication | IEEE Xplore

On estimation of unknown state variables in wastewater systems


Abstract:

This paper focuses on the estimation of the non-measurable physical states of wastewater systems when nonlinear models with uncertainties describe the processes. The Acti...Show More

Abstract:

This paper focuses on the estimation of the non-measurable physical states of wastewater systems when nonlinear models with uncertainties describe the processes. The Activated Sludge Process (ASP), as the most commonly applied biological wastewater purification technique, attracts a great deal of attention from the research community. We developed for this class of processes a State Dependent Differential Riccati Filter (SDDRF) for state estimation of nonlinear model describing the system. The resulting software sensor is simple to implement and has a relatively low computational cost. The results are compared with the Extended Kalman Filter (EKF) in order to demonstrate the better performance of the SDDRF filter. The filter allows the on-line tracking of process variables, which are not directly measurable. The simulation results point out to the advantage of using this approach.
Date of Conference: 22-25 September 2009
Date Added to IEEE Xplore: 04 December 2009
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Conference Location: Palma de Mallorca, Spain

References

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