Super-twisting-based sliding mode control of drum boiler energy conversion systems

Yazan M. Alsmadi, Imtiaz Ur Rehman, Ali Uppal A, Vadim Utkin, Isaac Chairez, Mohammed Ibbini

Research output: Contribution to journalArticlepeer-review

Abstract

A drum boiler is the most critical part of power generation plants. The control of a highly nonlinear, multiple input and multiple output drum boiler system (DBS) is a challenging task. In this work super-twisting sliding mode controllers (STSMCs) are designed for the control-oriented model of the DBS, which maintain a desired water level and pressure of the drum. The unknown state of the DBS required for the control design is estimated using a gain-scheduled Utkin observer (GSUO). A rigorous mathematical analysis is also included to show that the closed-loop system is locally stable. The simulation results show that the closed-loop system yields the required performance even in the presence of parametric uncertainty, process and measurement noises, and external disturbance. To make a fair comparison, a quantitative analysis is also carried out for STSMC and PI controllers. Both controllers consume similar control energy, but STSMC shows better tracking performance.

Original languageEnglish
JournalInternational Journal of Control
DOIs
StateAccepted/In press - 2021

Keywords

  • Drum boiler system
  • energy conversion systems
  • gain-scheduled Utkin observer
  • super twisting sliding mode control

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