精密挤出过程中的统计过程控制样本分析  

Sample Analysis of Statistical Process Control for Precise Extrusion Process

作　　者：张丽蕾[1] 陈卫红[1] 许红[1] 吴大鸣[1] 

机构地区：[1]北京化工大学塑料机械及塑料工程研究所,北京100029

出　　处：《中国塑料》2005年第5期91-94,共4页China Plastics

摘　　要：对精密挤出控制系统自动测量的牵引速度数据进行了分析。根据计算反馈值的方法,给出了精密挤出反馈系统需要的反馈控制数学模型,依据采集数据的等差数列形式给出实验设定值方程,通过最小二乘拟合的方法计算出设定值与反馈值之差的方程,利用反馈控制模型对精密挤出反馈控制系统的设定值程序进行了修改,采集反馈修正后的数据,用坐标轴旋转公式使数据样本转变为适合统计过程控制图的形式,同时给出了最终数据处理所应采用的统计过程控制图,得到在精密挤出系统中应用统计过程控制图的方法。Data of drawing velocity that is automatically measured by precise extrusion were analyzed. According to requests of statistical process control, data collected by arithmetic sequence of number was calculated. Feedback control equation that systems need was found by least square fitting. The initialization program of the feedback control system of precise extrusion was modified. Data were transformed to fit the statistical process control chart by revolving coordinates. The final applied control chart was given for data processing. The method applying statistical process control chart to precise extrusion was obtained.

关 键 词：精密挤出 样本分析 反馈控制 数学模型 统计过程控制 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]