Bagasse

Control engineering

Process control

Drum

Process engineering

PID controller

Pulp and paper industry

Gene

Operating system

Engineering

Artificial intelligence

Control (management)

Chemistry

Superheated steam

Boiler (water heating)

Computer science

Temperature control

Process (computing)

Steam drum

Boiler feedwater

Control theory (sociology)

Waste management

Biochemistry

Robustness (evolution)

Mechanical engineering

IEEE Access

This paper proposes the design of a PI <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">α</sup> robust controller with which to regulate the steam pressure in the steam drum of a bagasse-fired boiler. The dynamic behavior of this process was identified by means of experimentation. This identification procedure yielded an equivalent third order plus time delay model, and showed wide process static gain variations. We, therefore, propose a new method with which to design fractional-order robust controllers for this kind of processes. This method is based on the exact attainment of certain nominal time specifications while using one of the parameters of the controller to maximize the gain margin. The controllers attained were shown to significantly outperform the robustness achieved by using PI or PID controllers, in the sense of reducing the Integral Absolute Error (IAE) and improving the steam pressure uniformity.

Design of a PIα Controller for the Robust Control of the Steam Pressure in the Steam Drum of a Bagasse-Fired Boiler