基于电磁悬浮的南疆机采棉除杂过程杂质运动规律及控制策略的研究

According to the southern area of Xinjiang, that machined film cotton content high impurity cause cotton processing difficulty of the problems, to the alar region surrounding cotton processing plant of the machine for film covered cotton processing as the object,and establish cotton covered with plastic film purification control model, and using electromagnetic theory, to establish cotton covered with plastic film in the electromagnetic field of the differential equations of motion by cotton attached; That testing of electricity and moving in electromagnetic field establishs cotton and impurities(film and dust)moving differences in electromagnetic field and the regression equation; According to the local machine collecting cotton covered with plastic film in impurity content information, accessing to the area for film covered cotton cotton impurity ratio parameter, on the different conditions of electric capacity and static distribution density difference undertakes an analysis,then bases on electromagnetic suspension state cotton purification control model; Through the carrier test, combined with on-line monitoring data processing and analysis;Cotton and impurities form fluid optimization control, then the relation model is verified and reconstruction; put forward cotton and magazine in the electromagnetic suspension motion separation rule model and control strategy, in order to reduce the early processing of cotton after the impurity rate and provide a theoretical basis.

针对南疆地区机采地膜棉杂质含量较高，造成棉花加工难度加大的现实问题，以阿拉尔地区周边棉花加工厂的机采地膜棉加工为对象，建立地膜棉除杂净化的控制模型，利用电磁悬浮理论，建立地膜棉在电磁场中的流动规律的微分方程；通过对原棉附电及在电磁场中运动试验，建立棉花与杂质（地膜和粉尘）在电磁场中运动差异的回归关系方程；依据当地机采地膜棉的含杂量资料，获取该地区地膜棉的棉花与杂质的比例参数，对其不同条件下的附电能力和静电分布密度差异进行分析，归纳总结出在电磁悬浮状态下棉花与杂质分离的规律；利用在线检测技术获取棉花与杂质在电磁场中的运动分离的资料；通过载波试验，结合在线检测所得数据的处理与分析，对棉花与杂质构成的流体进行优化控制，再对上述关系模型进行验证与重构；提出棉花与杂志在电磁悬浮状态下的运动分离规律模型及控制策略，为降低初加工后棉花的含杂率提供理论依据。

本项目针对南疆机采棉产量高，杂质成分复杂这一问题，发挥多学科交叉优势，开展机采棉电磁除杂的棉花与杂质分离运动规律模型的研究。通过大量的机采棉高压直流荷电和电磁除杂控制等基础数据的积累工作，获取最佳控制参数和试验方案。利用杂质成分和含量的差异对南疆各地域的机采棉进行细分的方法，研究机采棉的荷电差异性以及荷电规律，梳理出南疆机采棉荷电的特性，该机采棉荷电控制装置已获得实用新型专利授权，通过多数据的分析，建立了南疆机采棉电磁除杂的杂质运动规律模型。探索开展了不同地域的机采棉除杂的差异性，不同的控制方法和不同的机采棉水杂含量交互试验条件下的杂效果的差异性等相关试验研究。设计了机采棉电磁除杂控制平台。. 项目研究成果：获得实用新型专利6项。发表论文12篇，其中EI收录3篇，中文核心论文7篇。锻炼培养青年教师3名，组建了一支南疆机采棉电磁除杂控制研究团队。项目相关试验成果为进一步开展南疆机采棉除杂控制和为地方经济发展服务方面奠定了良好的基础。