Disturbance observer-based backstepping sliding mode fault-tolerant control for the hydro-turbine governing system with dead-zone input

Yapeng Yi; Diyi Chen

doi:10.1016/j.isatra.2018.11.032

Disturbance observer-based backstepping sliding mode fault-tolerant control for the hydro-turbine governing system with dead-zone input

ISA Trans. 2019 May:88:127-141. doi: 10.1016/j.isatra.2018.11.032. Epub 2018 Dec 6.

Authors

Yapeng Yi¹, Diyi Chen²

Affiliations

¹ Institute of Water Resources and Hydropower Research, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
² Institute of Water Resources and Hydropower Research, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Australasian Joint Research Centre for Building Information Modelling, School of Built Environment, Curtin University, WA 6102, Australia. Electronic address: diyichen@nwsuaf.edu.cn.

PMID: 30577999
DOI: 10.1016/j.isatra.2018.11.032

Abstract

This paper investigates a backstepping sliding mode fault-tolerant tracking control problem for a hydro-turbine governing system with consideration of external disturbances, actuator faults and dead-zone input. To reduce the effects of the unknown random disturbances, the nonlinear disturbance observer is designed to identify and estimate the disturbance term. To drastically decrease the complexity of stability functions selection and controller design, the recursive processes of the backstepping technique are employed. Additionally, based on the nonlinear disturbance observer and the backstepping technique, the sliding mode fault-tolerant tracking control approach is developed for the hydro-turbine governing system (HTGS). The stability of HTGS is rigorously demonstrated through Lyapunov analysis which is capable to satisfy a tracking control performance. Finally, comprehensive simulation results are presented to illustrate the effectiveness and superiority of the proposed control scheme.

Keywords: Actuator faults; Backstepping control; Dead-zone input; Fault-tolerant control; Hydro-turbine governing system; Nonlinear disturbance observer; Sliding mode control.