开环自调匀整控制器中延时在线计算方法

Online Algorithm of Time Delay Computation in Open-loop Autoleveller System

本文研究了并条机开环自调匀整控制器的延时计算方法,精确延时是决定输出纱条匀整效果的关键。现有确定延时的方法主要有几何法、实验法和相关法,都是离线测量方法。本文提出了一种基于相关分析的在线延时计算算法,该算法首先建立开环自调匀整的数学模型,然后进行喂入棉条定量检测点和输出棉条定量检测点的相关分析,根据相关函数的最大值和最小值可以一次性确定系统的延时时间。仿真结果显示该算法的正确性。与现有算法相比,该算法具有准确、在线自适应及易操作等优点。

The paper investigate the algorithm of time delay computation in open-loop autoleveller system of drawing frame machine. Precise delay is the key to the evenness of yarn thickness. The existed methods to compute the delay mainly consist of geometry, experiment and correlation algorithms, which are offline. The paper presents a online algorithm of time delay computation which is based on correlation analysis. The algorithm gives the mathematical model of open-loop autolevel, and analyzes the weight correlation between input yarn and output yarn. According to the maximum and minimum of correlation function, the concerned delay can be computed at once. Simulation results verify the algorithm. Compared with the existed methods, the algorithm is exact, online and easy to operate.