An experimental study on feedback control of rotating disk flutter

• Published in: Journal of fluids and structures Vol. 20; no. 1; pp. 71 - 80
• Main Authors: Huang, X.Y., Hoque, M.E., Wang, X.
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 2005; Elsevier
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Optical interferometry; Vibration; Aeroelastic flutter; Perforated plate; Feedback regulation; Critical speed; Metal; Steel; Experimental study; Vibrometer; Laser interferometer; Optical measurement; Laser dopplerometry; Active system; Rotating disk; Vibration control; Aeroelasticity; Force control; Structural analysis
• ISSN: 0889-9746; 1095-8622
• DOI: 10.1016/j.jfluidstructs.2004.10.001

An experimental study is presented in this paper to demonstrate the feedback control of rotating disk flutter. In the experiment, steel disks were rotated between two solid plates and the disk flutter was detected by a laser-Doppler vibrometer. The disk vibration signals were then processed to drive a speaker mounted on one of the supporting plates. The air pressure generated by the speaker was applied to the disks, through a hole in the plate, acting as the control force. The disk mode frequencies, critical speed and flutter speeds were measured for two disks with different sizes, and the results were compared with predicted values. It is shown that the feedback control can effectively suppress the flutter on a large disk (135
mm diameter) rotating up to 11
000
rpm and on a small disk (100
mm diameter) rotating up to 15
000
rpm. Further improvement of the control technique is also discussed.