Analysis of Transverse Vibration of a Longitudinally Moving Fabric

Fabric moves along running direction continuously in the processing of weaving, dyeing and finishing and its dynamic behavior is very complex. Running at a high speed, the fabric vibrates, which has great influence not only on the performance of machine, but also on the fabric itself. Analysis of transverse free vibration of a longitudinally moving fabric is put forward in this paper and the calculating formula of natural frequencies of the fabric is introduced accordingly. Meanwhile the effects of several parameters on the first order natural frequency are also discussed.     

制笔机床小动力头系统的临界转速分析

小动力头系统是多工位笔头加工机床的关键部分,其运转性能直接影响笔头的加工质量.以24工住笔头加工机床为例,采用传递矩阵法计算小动力头系统的临界转速,并讨论结构参数对临界转速的影响,分析结果对我国多工位制笔机床的研制具有一定的参考价值.     

网络RTK定位技术及其现状分析

文章简要介绍了网络RTK定位技术的概念和国内外基准站网建设的发展现状,并对网络RTK定位技术的研究现状进行了分析。