振动拉削双阀激振系统输出波形稳定性分析及实验研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (20) : 84-90.

论文

蒙臻1，倪敬1，武传宇2

作者信息 +

Experimental and analysis on output waveform stability of dual-valve excitation system during vibration broaching

MENG Zhen1， NI Jing1， WU Chuan-yu2

Author information +

文章历史 +

摘要

为了分析振动拉削系统在加工过程中电液激振输出幅值稳定性问题，首先引入流量耦合线性模型和拉削负载力模型，构建了双阀激振系统的传递函数，推导了系统输出位移和输出力的时域响应函数；再利用MATLAB仿真计算及绘制开环系统的Bode图和幅值时域响应曲线；最后，利用自行研制的振动拉削实验平台所测得的激振器输出幅值与仿真结果进行对比分析，研究结果表明：激振信号的频率会影响输出波形的平衡位置及波动幅值，激振信号频率越高，输出波形越容易调节；而拉削负载力主要影响输出波形的振荡次数，负载力越大，输出波形越不稳定。因此，为了使拉削过程中激振输出波形更加稳定，一方面可适当提高激振缸缸径和行程的比值，以增大系统极限响应频率，另一方面需蓄能装置或大流量型开关阀平衡激振缸容腔压力配比。

Abstract

In order to investigate the output amplitude stability of excitation system during vibration broaching, a transfer function of dual-valve excitation system was established by considering the flow coupled linear model and the broaching force model. And the time domain response function of output force and displacement was obtained based on the transfer function. Then, the simulate results of aforementioned function was calculated by MATLAB, including Bode diagram and response curve of time domain. At last, the experimental data were compared with simulation results, which obtained from the novel vibration broaching platform. The results show that the frequency of the excitation signal affects the balance position and the amplitude of output waveform. The higher the frequency of the signal, the easier the output waveform can be adjusted. The oscillation frequency of the output waveform is mainly affected by the broaching force. The greater the force, the more unstable the output waveform was. Therefore, to make the output waveform more stable, the ratio of vibration cylinder bore and stroke should be improved, which could increase the response frequency. On the other hand, the energy storage device and flow type valve should be added, which could balance the pressure ratio of vibration cylinder cavity.

导出引用

蒙臻1，倪敬1，武传宇2. 振动拉削双阀激振系统输出波形稳定性分析及实验研究[J]. 振动与冲击, 2017, 36(20): 84-90

MENG Zhen1， NI Jing1， WU Chuan-yu2. Experimental and analysis on output waveform stability of dual-valve excitation system during vibration broaching[J]. Journal of Vibration and Shock, 2017, 36(20): 84-90

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