基于虚拟仪器的振动攻丝机振动参数测量  

Measurement of Vibration Parameters of Vibration Tapping Machine Based on Virtual Instrument

作　　者：杨明亮[1] 

机构地区：[1]陕西理工学院机械学院,汉中723003

出　　处：《机械工程学报》2011年第6期12-16,共5页Journal of Mechanical Engineering

基　　金：陕西省教育厅重大产业化资助项目(03jc36)

摘　　要：对于机械式振动攻丝机,当主轴在回转振动的同时还有回转运动和轴向移动,振动参数的测量是困难的。主要的困难是振动信号的提取。将等幅摆振信号通过正弦变化率调制,得到了振频不变、振幅变为不等幅的扭振信号。调制后的扭振信号包含振频和振幅信息,采用虚拟仪器技术可以从调制后的信号中得到振幅和振频。由于位移传感器的测量范围大于扭振振幅的范围,该测量仪要求较高的A/D转换精度。该仪器可以实现在线实时标定。采用信号调制技术与虚拟仪器技术相结合,解决了振动攻丝机振动参数测量问题。经试验证明,该测量原理是可行的。For the mechanical vibration tapping machine,it is hard to measure vibration parameter when spindle has rotary vibration as well as rotary motion and axial movement.The major difficulty is to pick up the vibration signals.The torsion vibration signals with changed amplitude and unchanged frequency are obtained by the sine derivative modulation of the constant amplitude.After the modulation,the torsional vibration signals contain the information of vibration frequency and amplitude.By using the virtual instrument technology,vibration frequency and amplitude can be obtained from the modulated signals.Because the measuring range of the displacement sensor is larger than the range of torsional vibration amplitude,a high accuracy of A/D converter is required.The instrument can realize online real-time calibration.By combining the signal modulation technology with the virtual instrument technology,the vibration parameter measurement problem of the vibration tapping machine is solved.This measurement principle is proved feasible by experiments.

关 键 词：振动攻丝机 虚拟仪器 扭转振动 振幅 振频 测量 

分 类 号：TH-55[机械工程]