The effect of inappropriate dead time settings on the regulation of unevenness of material implemented by the automatic control: an application in the textile spinning industry

In this paper, we analyze the efficiency of regulation of unevenness material implemented by automatic control in case of inappropriate dead time settings. In this analysis, we consider various degrees of inaccurate dead time settings, different sizes, and occurring frequencies of the faults on the material. The results obtained indicate that in some cases, the regulation can still continue even in case of quite high degree of inaccurate dead time settings. However, the results obtained indicate also that the evenness of material after the regulation process can be worse than before regulation process in some cases. The work is carried out using simulation methodology and by considering the autoleveler equipment used as an automatic control system in the textile industry.     

并条机自调匀整双开环控制系统

为进一步提高并条机自调匀整技术,在分析纺织并条机自调匀整控制系统优劣的基础上,提出一种新的双开环控制系统,给出了新型控制系统的数学模型,详细分析了其数学原理,阐述了双开环自调匀整控制系统的理论基础。通过比较开环、闭环控制系统和混合环控制系统认为,该控制系统能够缩短盲区,消除死区,并能2次匀整条干。通过性能分析得出,双开环控制系统能够获得更好的匀整效果。