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Vibration control of a journal-bearing test rig using gain-scheduled controller

Grant number: 17/15494-0
Support Opportunities:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): January 22, 2018
Effective date (End): January 21, 2019
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal Investigator:Katia Lucchesi Cavalca Dedini
Grantee:Matheus Freire Wu
Supervisor: Richard Markert
Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: Technische Universität Darmstadt (TU Darmstadt), Germany  
Associated to the scholarship:16/13059-1 - Linear parameter varying control applied to rotating machinery, BP.DD


This Research Internship Abroad (BEPE) proposal consists mainly on the experimental aspect of the currently doctoral project (grant #2016/13059-1), which is part of the ongoing thematic project (#2015/20363-6) in cooperation with the German institution Technical University of Darmstadt (TU Darmstadt). Rotors are always susceptible to vibrations due to unbalance, and, particularly, shafts supported by hydrodynamic journal-bearings usually present instability due to oil-whip effect. Although there are some active and passive methods to mitigate those problems, the subject is still relevant. In the doctoral project it is proposed to design a controller that not only tackles the described issues, but also is robust to uncertainties. A promising method seems to be the two-stage design via linear matrix inequalities (LMI). Good results were obtained in computational simulations; however an experimental validation is necessary. The goal of this internship is to test and compare the control method at a test rig owned by the Institute of Applied Dynamics of TU Darmstadt. In addition to the experimental part, we aim to share experience and knowledge about different control strategies and magnetic actuators application in rotating systems. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
WU, MATHEUS FREIRE; CAVALCA, KATIA LUCCHESI. Experimental validation and comparison between different active control methods applied to a journal bearing supported rotor. STRUCTURAL CONTROL & HEALTH MONITORING, v. 26, n. 12, . (17/15494-0, 15/20363-6, 16/13059-1)
WU, MATHEUS F.; CAVALCA, KATIA L.; MARKERT, RICHARD. Feedforward Rotor Fault Compensation. STRUCTURAL CONTROL & HEALTH MONITORING, . (16/13059-1, 17/15494-0, 15/20363-6)
WU, MATHEUS F.; CAVALCA, KATIA L.; MARKERT, RICHARD. Feedforward Rotor Fault Compensation. STRUCTURAL CONTROL & HEALTH MONITORING, v. 27, n. 6, . (15/20363-6, 16/13059-1, 17/15494-0)

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