基于AR模型的印刷机滚筒扭矩及其振动试验研究  

Tests on the torque transfer and torsional vibration of printing machine's cylinder with a data processing method combining AR model and wavelet decomposition

作　　者：王仪明[1] 赵明明[1] 武淑琴[1] 许文才[1] 

机构地区：[1]北京印刷学院机电工程学院,北京102600

出　　处：《振动与冲击》2016年第3期226-230,共5页Journal of Vibration and Shock

基　　金：国家科技支撑计划课题(2012BAF13B05);北京市教委重点项目暨北京市自然基金重点项目B类(KZ201510015016)

摘　　要：稳定性低是国产印刷机面临的共性问题,印刷滚筒扭振是影响稳定性的关键因素之一。以印刷机压印滚筒作为研究对象,分析了压印滚筒在动力传递过程中的扭矩传递规律:滚筒扭矩因空档等原因存在突变。采用AR(自回归)模型和小波分析相结合,提出了滚筒扭振信号的后处理方法,实现了信号去噪;通过对扭矩测试和数据分析,提取出印刷滚筒的扭振前5阶固有频率65 Hz、80 Hz、300 Hz、375 Hz、400 Hz;通过与传递矩阵法结果比较,验证了扭振信号处理方法的正确性。研究结果为印刷滚筒的减振与结构优化提供了依据。The low stability is a common problem for the printing machine and the torsional vibration of the printing cylinder is one of the key factors affecting the stability. The torque transfer in the power transmission between impressing cylinders was analysed and it is shown the abrupt change of torque will happen due to cylinder＇s gap. A post processing method for the torsional vibration data, combining the AR （autoregressive） model and wavelet decomposition, was put forward in order to realize the signal denoising. The first five torsional natural frequencies of a real printing machine＇s cylinder, 65 Hz, 80 Hz, 300 Hz, 375 Hz and 400 Hz, were successfully identified by using the method presented. Compared with the resulsts of the transfer matrix method, the accuracy of the method proposed was verified. The research results provide a basis for printing cylinder＇s vibration mitigation and give guidance for structural optimization design.

关 键 词：AR模型 扭振测试 小波分析 印刷机 印刷滚筒 

分 类 号：TH113[机械工程—机械设计及理论]