摘要
时间-压力点胶技术已被广泛应用于电子封装业,该过程涉及空气动力学和非牛顿流体力学,使得难以建立一个精确的点胶物理模型,更难于控制。本文在对点胶非牛顿流体特性分析和合理的假设基础上,利用贝塞尔函数法建立点胶非牛顿流体流量模型,并设计PI控制器基于模型进行预测控制。仿真和实验验证了模型和控制方法的有效性。
Time-pressure dispensing has been widely used in electronics manufactur/ng, this process relates to aerodynamics and non-Newtonian hydromechanics etc. , which makes it extremely difficult to develop an accurate physical model to represent this process. Based on the analysis and some reasonable assumptions about the dynamic of non-Newtonian fluid, a dispensing flow rate model was presented with the method of Bessel function, and a PI controller was designed to control the dispensing process based on the model. Both simulations and experiments were conducted to verify the effectiveness of the model and the control strategy.
出处
《机床与液压》
北大核心
2007年第9期173-175,共3页
Machine Tool & Hydraulics
基金
国家自然科学基金"十五"重大项目(50390063
50390064)
国家重点基础研究发展计划(973)项目(2003CB716207)
关键词
点胶
贝塞尔函数
流量模型
控制
Dispensing process
Bessel function
Flow rate model
Control
