The excited waveform analysis of the electro-hydraulic vibration exciter under sinusoidal and triangular waveform input
Based on the work principle of the electro-hydraulic vibration system and the theory of fluid power system, the mathematical model of the vibration exciter is first established considering the nonlinear relation between flow rate and pressure. Then the output waveforms under the sinusoidal and triangular wave input are obtained through analytically solving the dominant equations of the model by means of the sub-sectional integration. Finally, experiments have been carried out and the displacement waveforms of the cylinder piston were measured. The theoretical and experimental investigations are shown that the vibration waveforms excited by the sinusoidal and triangular wave are fairly similar to one another. It is also found that although the valve port opening area varies in the typical wave, the wave peak of excited waveform declines toward lateral side and the wave trough declines toward medial side. The extent of deviation depends on the valve port opening area. When the peak of the load pressure is equal to system pressure, the minimal opening area is defined as a critical saturation value. Below this value the amplitude of the waveforms decreases as valve opening area is reduced. Beyond this threshold, the wave is saturated and saturation degree increases with the enlargement of the valve opening area. The changes of the amplitude of the waveforms and the saturation degree follow a linear law as the valve opening area varied.
Electro-hydraulic vibration exciter The exciter waveform analysis Dynamics of fluid power system
Yan Ren Jian Ruan Sheng Li
The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology, Hangzhou, China
国际会议
杭州
英文
253-256
2009-04-08（万方平台首次上网日期，不代表论文的发表时间）