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跳汰机是分离过程中用到的最重要的设备,它利用水力和重力的影响,对颗粒物质加以分层。但人们对于不同密度、粒度和形状的颗粒在运动的料床中实现分层的确定机理还知之甚少。于是我们设计了一个模型,使用离散单元法来理解跳汰床层的行为。我们利用这个模型来研究床层的分层行为及其控制。控制作用是建立在模糊逻辑的框架内对分层的物理过程理解的基础之上。模型逻辑控制器(FLC)提供的控制作用取决于当前的分层程度和跳汰循环的频率。结果显示跳汰循环较少的变化,FLC可获得分层效果。
Jig is the most important equipment used in the separation process, it uses the influence of water and gravity to stratify the particulate matter. However, little is known about the exact mechanism by which particles of different densities, sizes and shapes can be stratified in a moving bed. So we devised a model that uses the discrete element method to understand the behavior of the jigging bed. We use this model to study the bedding behavior and its control. The role of control is based on the understanding of layered physical processes within the framework of fuzzy logic. The control provided by the model logic controller (FLC) depends on the current level of stratification and the frequency of the jig cycles. The results show fewer changes in the jig cycles, and the FLC achieves a stratification effect.