Using the methodology of state observers for detection of crack in continuous systems

• Grant number: 16/04521-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2016
• End date: April 30, 2017
• Field of knowledge: Engineering - Mechanical Engineering - Mechanical Engineering Design
• Principal Investigator: Gilberto Pechoto de Melo
• Grantee: Marcelo Matioli Gomes
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

The increase in productivity and profitability of the industrial sector leads the current industries to be concerned more with the security of their systems and equipment, and the need to monitor them constantly for rapid detection and action in case of failure. In real systems, various system parameters may vary during the process due to the characteristics of the materials themselves or natural wear of its components. Even in well-designed systems, the occurrence of cracks in certain components can cause economic loss or lead to lack of security. The methodology of the state observer enables the reconstruction of states unmeasured system, provided that it is observable, making it possible to estimate measurements in inaccessible places or unmeasured system. This technique consists of building a model for the system to be analyzed and compare the estimated output with measured output and the difference signal resulting from a residue which is subsequently used for analysis. In this way, we intend to develop a methodology to generate state observers of banks associated with a crack model for monitoring the progress of it, applying it through computational and experimental validation simulation, using a cantilever beam mounted on an inertial table Vibrations Laboratory, Department of Mechanical Engineering Faculty of Ilha Solteira.