局部多孔质气浮输运的气膜特性及控制策略研究

项目名称： 局部多孔质气浮输运的气膜特性及控制策略研究

项目编号： No.51205174

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 钟伟

作者单位： 江苏科技大学

项目金额： 25万元

中文摘要： 玻璃基板的大型化、薄型化趋势要求其在输运过程中必须采用无摩擦非接触的方式以确保表面无损伤。局部多孔质气浮输运凭借其清洁无污染、不发热、不生磁等优势，成为非接触式输运领域的主流。然而，基于多孔质流动规律的气膜特性理论模型的匮缺在很大程度上限制了技术的发展。本项目将以自身前期开展的多孔质流量特性研究作为基础，针对局部多孔质阵列气浮支承的工况，采用平行圆板间放射状间隙流模型与Hele-Shaw势流模型相结合的方式提出气膜压力分布的高效计算方法，研究气膜承载力与刚度的影响因素，根据试验结果进行修正并建立气膜静态特性相关理论体系；建立包含多孔区域表面速度滑移边界的气膜动态特性模型，仿真结合试验分析供给流量、气浮阵列分布等对自由振荡衰减速度的影响；通过采用正负压联合加载的方式，设计鲁棒控制器对气浮间隙进行主动控制以提高输运的稳定性。课题研究可望为局部多孔质气浮输运系统的优化设计奠定理论基础。

中文关键词： 多孔质；气浮输运；气膜；静态特性；动态特性

英文摘要： The tendency of larger and thinner for the glass panel requires a non-contact mode during the conveying process in order to prevent scratch on the surface.Partial porous aerostatic conveyor has several advantages such as clean, magnetic free, and generating little heat, and therefore comes to dominate in the non-contact conveying field. However, the absence of porous flow based theory model for air film characteristics undoubtedly restricts the improvement of the technologies greatly. According to earlier research on flow rate characteristics of porous media, an efficiency method, based on the combined model of the radial flow and the Hele-Shaw flow between two parallel disks, is proposed to calculate the pressure distribution for the case that glass panel supported by aerostatic array. Influencing factors of the load capacity and stiffness of the air film are investigated, and static characteristics related theory is revised and established by experimental validation. An air film dynamic model is estabished considering a velocity-slip boundary on the porous surface, and factors that have impacts on decay speed of free vibration, such as supply flow, aerostatic array distribution, are analyzed theoretically and experimentally. As for improving the stability of aerostatic conveying, a robust controller is develop

英文关键词： Porous media；Aerostatic conveying；Air film；Static characteristics；Dynamic characteristics