Separate Control Characteristics of Electro-Hydraulic Vibrator Using a Parallel Mechanism

Abstract:

A scheme of the separate control technique of electro-hydraulic vibrator is proposed, in which symmetrical hydraulic cylinder is controlled by a parallel mechanism of a two-dimensional valve (named as 2D valve) and a parallel servo valve. The working frequency and vibration amplitude of the electro-hydraulic vibrator are dominated by the rotary speed and the sliding displacement of the spool of the 2D valve respectively, and the vibration central piston is controlled by the sliding displacement of the spool of the parallel servo valve. This paper analyzes the relationship between vibration characteristic values and control parameters using the analytic method based on the hydrodynamic control theory. The experimental system is built to verify that the theoretical analysis is consistent with measured results.

• Periodical: Advanced Materials Research (Volumes 199-200)
• Pages: 953-957
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.199-200.953
• Online since: February 2011
• Authors: Yan Ren, Jian Ruan, Ji Yan Yi
• Keywords: Control Valve, Electro-Hydraulic Vibrator, Parallel Mechanism, Separate Control

References

[1] Merritt E H: Hydraulic control systems. (JOHN WILEY & SONS, New York 1967).

[2] R. C. Stroud and G. A. Hamma: Multiexciter and multiaxis vibration exciter control systems. Sound and Vibration, Vol. 22(1988), pp.18-28.

[3] J. Ruan and R.T. Burton: An electrohydraulic vibration exciter using a two-dimensional valve. Proceeding of the institution of mechanical engineers part 1-Journal of systems and control engineering. Vol. 223(2009), pp.135-147.

DOI: 10.1243/09596518jsce634

[4] Y. Ren and J. Ruan: Study on output waveforms of an electro-hydraulic vibration exciter under actions of typical waveforms. China Mechanical Engineering. Vol. 24(2009), pp.2963-2968, in Chinese.