Multivariable Nonlinear Control Design for Boiler-Turbine Units

This paper deals with the application of a multivariable nonlinear controller (MNC) to a multivariable nonlinear boiler-turbine unit. The method can asymptotically estimate and compensate the nonlinearity, coupling and disturbances owing to its observation ability. A decentralized MNC system is obtained for a nonlinear boiler-turbine model, and then evaluated under a wide range of operating conditions and perturbations. Simulation results show that the MNC can achieve decoupling, asymptotic tracking property without steady-state errors, disturbance rejection and better robust performance for boiler-turbine plants, compared with GA/LQR and standard optimal controller LQR