Application of Robust Control Theory to Main Steam Temperature of Circulating Fluidized Bed Boiler

Main steam temperature of circulating fluidized bed boiler possesses the features such as large inertia, large lag and non-linear, so it can be equivalent to a one-step inertia object with time delay which has measurable disturbance in a specific condition. This paper is based on FOPDT model, design a new kind of non-fully differential PID controller with H^infin control technology, then makes the widely used PID controller more robust, while avoiding the problem of controller directly designed with control theory is hard to be realized for higher-step.