Automatic Design of Fuzzy Rules using GA for fault Detection in Cracked Structures

摘要

Vibration-based inspection is an area of active research. This paper provides an overview of methods to detect, locate, and characterize damage in structural and mechanical systems by examining changes in measured vibration response. In order to investigate the prevailing effects of damage present in the structure under examination, a mathematical model of the damage must be introduced into the model of the structure at the location of the fault. While focusing on transverse vibrations, a simple stiffness reduction of the damaged region was used. In the present work the vibration parameters (relative first three natural frequencies) of the cracked structure are treated in a controller. Lots of evolutionary techniques have been used in fusion with fuzzy logic. The controller proposed in the paper is designed using fuzzy logic & genetic algorithm. Here the fuzzy rules are optimized by using genetic algorithm. Using the controller, the crack locations (relative crack depth & relative crack location) can be determined.