Experimental validation and comparison between different active control methods applied to a journal bearing supported rotor

Author(s)

Wu, Matheus Freire ^[1] ; Cavalca, Katia Lucchesi ^[1]

Affiliation

^[1] Univ Estadual Campinas, Sch Mech Engn, Lab Rotating Machinery, 200 Rua Mendeleyev, BR-13083860 Campinas, SP - Brazil

• Document type: Journal article
• Source: STRUCTURAL CONTROL & HEALTH MONITORING; v. 26, n. 12 DEC 2019.
• Web of Science Citations: 0

Abstract

Rotors supported by cylindrical hydrodynamic journal bearings usually face rotational speed limitations due to the unstable motion caused by oil whip effect. An active magnetic bearing is utilized as auxiliary component to suppress oil whip and reduce unbalance lateral vibration amplitude at critical speed. Three distinct control methods are considered for the actuation force (dynamic H-infinity, mu synthesis, and polynomially parameter-dependent static H-infinity), which must be designed to perform in a situation with varying parameters and uncertainties. These techniques are tested in scenarios with collocated and noncollocated feedback (emulating a magnetic actuator with magnetic flux sensors). The different resultant performances are successfully compared with each other numerically and experimentally. (AU)

• 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)
• 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)