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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Feedforward Rotor Fault Compensation

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Author(s):
Wu, Matheus F. [1] ; Cavalca, Katia L. [1, 2] ; Markert, Richard [3]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil
[2] Markert, Richard, Darmstadt Tech Univ, Inst Appl Dynam, Darmstadt, Germany.Wu, Matheus F., Univ Estadual Campinas, Sch Mech Engn, Rua Mendeleyev 200, BR-13083860 Campinas, SP - Brazil
[3] Darmstadt Tech Univ, Inst Appl Dynam, Darmstadt - Germany
Total Affiliations: 3
Document type: Journal article
Source: STRUCTURAL CONTROL & HEALTH MONITORING; v. 27, n. 6 JUN 2020.
Web of Science Citations: 1
Abstract

When damaged, it is not unusual to observe nonlinear responses in previously linear structures. Specifically, in rotating machinery context, unbalance, misalignment, bearing, and shaft damage occur during operation, and their responses arise as a combination of multiple modes and harmonics. These vibration effects are undesirable and, besides compromising the system performance, can propagate or generate further faults. In practice, the machine cannot be simply stopped for repairs, and a method for provisory attenuating such problems is desirable. The fault effects can be approximated by a set of loads distributed along the healthy rotor linear model approximation. Intuitively, one can also estimate counteractive forces to mitigate the fault symptoms. Therefore, this work proposes a simple feedforward approach to detect and compensate fault effects at multiple harmonics in rotors. The compensating force is calculated to minimize the least square modal difference between healthy and faulty rotor. A test rig is operated in distinct conditions to demonstrate and validate the method highlighting different fault symptoms (unbalance, misalignment, and shaft bow). (AU)

FAPESP's process: 15/20363-6 - Fault tolerant identification and control of rotating systems
Grantee:Katia Lucchesi Cavalca Dedini
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/13059-1 - Linear parameter varying control applied to rotating machinery
Grantee:Matheus Freire Wu
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 17/15494-0 - Vibration control of a journal-bearing test rig using gain-scheduled controller
Grantee:Matheus Freire Wu
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)