Uso de observadores de estado para detecção de falhas em sistemas mecânicos

Abstract

In this work, it was developed a method for the detection and location of faults in mechanical systems using state observers banks, which are designed by LQR (Linear Quadratic Regulator). With the ability to estimate values in states not measured, the state observer can be used in industry as a method of preventive maintenance, avoiding equipment failure, which can cause the production stop. Robust observers that follow the behavior of a parameter, or a combination of them form those observers’ banks. At this work, it was evaluated a mass-spring-damper system with 4 degrees of freedom, measured in three different situations. And, as conclusion of that, it is a valid way to use those estimators for monitoring the condition of the machines in an industrial sector, because it allows detect small variations of behavior and avoid equipment failure following its vibration behavior.