Affiliations: [a] School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, China | [b] College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai, China | [c] College of Mechanical and Control Engineering, Guilin University of Technology, Guilin, Guangxi, China
Correspondence:
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Corresponding author: Zupeng Zhou, School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, No.1 Jinji Road, Guilin, Guangxi 541004, China. Tel./Fax: +86 13607737105; E-mail:zhouzupeng@guet.edu.cn
Abstract: In the real application, realizing the accurate fault
prediction of non-smooth sandwich system with hysteresis which widely exists
in the real engineering systems is of great importance. Therefore, a novel
dynamic robust observer is proposed in this paper. First, the non-smooth
sandwich system with hysteresis is transformed into a system in which
conventional dynamic robust observer design method can be applied by
converting the non-smooth item into a general disturbance. Then, by zeros
assignment and minimizing the H∞, F /H-,F indicator on the
basic operation zone, the feedback matrices of this observer can be
obtained. After that, the simulation results are presented. The comparison
between the proposed robust non-smooth scheme and the conventional method
demonstrated that the proposed robust fault detection approach can detect
the actuator and sensor faults accurately and quickly which the conventional
observer can not detect the faults at all. Moreover, the missing and false
alarms are effectively reduced by the robust observer.
