Aiming at wastewater treatment system using activated sludge method

the problem of robust cost control is studied. Firstly

according to the characteristics of activated sludge wastewater treatment process

a normbounded uncertain system model is established. Then

using Lyapunov stability theory and linear matrix inequality method

the robust guaranteed cost state feedback control law is designed to make the closed-loop system robust asymptotically stable

and the performance index of the system does not exceed a certain upper bound. Finally

taking the wastewater treatment system of a sewage treatment plant as an example

the designed controller is applied for simulation research. The results show that the designed control algorithm is effective.