Predicting Failure in the Hydraulic Lift Structures with Monitoring and Fuzzy Logic

There are several strategies for maintenance and repairing of devices in industry. However, they are still confronted with many uncertainties. A hydraulic lifting device after ten years of working in a technical center in Isfahan is faced with uncertainty in terms of reliability. Being able to know the reliability of pieces means predicting failure occurrences, which is accomplished by condition monitoring of the pieces by measurement of errors and ambiguous boundaries. Using condition monitoring and expert groups and multiple membership functions by creating a fuzzy system in MATLAB software uncertainties important components and the structure status are obtained in the fuzzy form. Moreover, between the healthy and damaged conditions a percentage of health is obtained and the health of system is shown.