Fault detection and isolation for multi-motor web-winding system via robust sliding mode observers
CHU Xiao-yan
NIAN Xiao-hong
LIU Jing-jing
Abstract：The robust fault detection and isolation strategy for multi-motor web-winding system with changing oper-ating environment is put forward. Firstly, taking into account the changes of the friction coefficients, Young’s modulus, radii and the moments of the roller, etc. which are caused by the changing operating environment, the unknown input disturbance is introduced to describe the system parameters uncertainties of the multi-motor web-winding system, based on which a generalized nonlinear system dynamic model with actuator faults and uncertainties is constructed. Next, a robust sliding mode observer is developed as fault detection observer to detect actuator faults. Furthermore, multi-observers are used for the multi actuator faults isolation purpose. Then, according to the Lyapunov theory, the sufficient conditions of exponential convergence for the designed observers are derived. Meanwhile, the observer gain matrix is presented. Finally, the simulation is conducted to verify the robustness and effectiveness of the proposed method.
Keywords：multi-motor web-winding systemsliding mode observersfault detectionfault isolation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 795-804 )