基于模糊控制的重介质悬浮液密度控制方法

Density control method for dense-medium suspension based on fuzzy control

针对现有重介质悬浮液密度模糊控制方法存在控制精度不高、通用性不强的问题,提出了一种基于模糊控制的重介质悬浮液密度控制方法。该方法以悬浮液密度偏差、悬浮液密度偏差变化率、合格介质桶液位作为密度模糊控制器的输入变量,以合格介质桶液位偏差、合格介质桶液位偏差变化率作为液位模糊控制器的输入变量,利用密度模糊控制器和液位模糊控制器有效控制补水阀和分流箱,从而实现重介质悬浮液密度精确、稳定控制。应用结果表明,该方法响应速度快,可使悬浮液密度波动范围稳定在±0.007g/cm^3。

In view of problems of poor accuracy and universality of existing density fuzzy controlmethods for dense-medium suspension, a density control method for dense-medium suspension based on fuzzy control was proposed. The method takes suspension density deviation, variation rate of the suspension density deviation and liquid level of qualified medium bucket as input variables of density fuzzycontroller, and takes liquid level deviation of qualified medium bucket and variation rate of the liquid level deviation of qualified medium bucket as input variables of liquid level fuzzy controller. Water supply valve and flow-spitting box are effectively controlled by use of the density fuzzy controller and liquidcontroller, so as to achieve accurate and stable control of dense-medium suspension density. Theapplication results show that suspension density fluctuation range can be controlled at ±0.007g/cm^3 with fast response speed.