Abstract
This paper presents an active anti-vibration control system with isolation of low-frequency vibration. A proper dynamic model of the anti-vibration control system is derived for controller design in that the identification scheme for a mathematic model is proposed. The model reference controls of the anti-vibration system with the sky-hook damper control and impedance control are analyzed respectively. An illustrated example of a single-degree-of-freedom anti-vibration system driven by a linear servomotor is given to verify the performance of the proposed control design. Experimental results are presented to validate that the peak resonance value of 0dB within a frequency of 10Hz can be achieved successively.
Highlights
1.1 Introduce the ProblemIsolating a piece of dainty machines from the vibration source is a practical issue for typical engineering areas
This paper presents an active anti-vibration control system with isolation of low-frequency vibration
In the active anti-vibration, extra energy is actively generated by the controlled actuators to reduce vibrations, such as the tuned mass dampers that are atop Taipei 101 (Tuned mass damper atop the Taipei 101, ND) and applied to offshore platforms to counter low frequency vibrations (Zhang, Ma, & Zhao, 2010)
Summary
Isolating a piece of dainty machines from the vibration source is a practical issue for typical engineering areas. The conventional approach, which adopts an equivalent mass with a damper and spring connected to the base, often leads to the trade-off of anti-vibration performance between high and low frequencies. For coping with this shortcoming, Karnopp, Crosby, and Harwood (1974) introduced a sky-hook damper, which significantly ameliorated the effect of this trade-off design. In this paper, based on the achievement of Yao, Hsueh, and Tsai (2013), an on-line tuning identification based on the recursive least-square errors is proposed, and model reference controls of the anti-vibration system with the sky-hook damper control and impedance control are analyzed. Experimental results are given to illustrate the performance of the proposed identification technique and anti-vibration control
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