The boiler-turbine control with actuator magnitude and rate constraints

This paper is on the controller design for the nonlinear boiler-turbine dynamics with actuator magnitude and rate constraints. The nonlinearity is handled by a suitable linear parameter varying representation of the nonlinear boiler turbine dynamics and controller design in terms of the linear matrix inequality condition parameterized by the drum pressure. The inclusion of the actuator dynamics as additional state variables of the plant enables the rate constraint to be addressed. Then, the magnitude and rate constraint of the actuator and the extent of water level deviation are formulated as linear matrix inequalities with the quantities of tracking commands as design parameters. The design results are verified through time response simulations.