Vibration control of a flexible beam structure using squeeze-mode ER mount

• Published in: Journal of sound and vibration Vol. 273; no. 1; pp. 185 - 199
• Main Authors: Jung, W.J., Jeong, W.B., Hong, S.R., Choi, S.-B.
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 21.05.2004; 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...); Vibration; Time frequency domain method; Rheology; Feedback regulation; Frequency domain method; Varying speed; Beam(mechanics); Mounting; Elastic support; Vibration damping; Time domain method; Feedback; Optimal control; Electrorheological fluid; Controllability; Vibration control; Differential integral proportional control
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/S0022-460X(03)00478-4

This paper presents vibration control of a flexible beam structure supported by squeeze-mode electro-rheological (ER) mounts. After devising an appropriate size of the squeeze-mode ER mount, its field-dependent damping forces are evaluated at various exciting frequencies. The damping force controllability of the ER mount is also demonstrated by implementing a proportional integral derivative (PID) controller. The ER mounts are then incorporated with a flexible beam structure subjected to external excitations. The governing equation of the structural system is obtained and an optimal controller which consists of the position and velocity components of the beam structure as feedback signals is designed to attenuate the imposed vibrations. The controller is empirically realized and control responses such as beam acceleration are evaluated in time and frequency domains. In addition, the forces transmitted from the input point (exciting position) to the base plate (mount position) are investigated by applying control voltage and constant voltage.