Simulation of thermomechanical behavior during continuous casting process based on MiLE method

A new method called mixed Lagrangian and Eulerian method(MiLE method) was used to simulate the thermomechanical behavior during continuous casting process of steel YF45MnV.The simulation results are basically in agreement with the measured data.The delaying period at the beginning of solidification is about 0.1 in square root of solidification time which is agreement with the data in literatures,and shell thickness increases in linear relation to square root of solidification time.The bloom surface temperature decreases gradually as the casting proceeds.The effective stress in the corner is much larger than that in the mid-face.The corner area is the dangerous zone of cracking.The effects of mold flux break temperature on the air gap and hot tearing indicator were also modeled.The model predicts that the bloom surface temperature increases with the increase of the mold flux break temperature,but the heat flux decreases with the increase of the mold flux break temperature.The hot tearing indicator is much smaller when the mold flux break temperature is higher.     

基于模糊PID的锂电池极片卷绕设备张力控制

锂电池极片卷绕设备卷绕过程中,控制好张力对卷绕的顺利进行、产品质量的保证起到关键的作用。文章以张力为对象,对锂电池极片卷绕设备控制系统进行设计,并将模糊自适应PID算法应用于张力控制系统。仿真结果表明,加入模糊自整定PID后系统稳定误差基本消除,系统响应时间和系统超调量明显减少,系统响应速度和控制精度有很大的改善,张力也稳定控制。     

基于SMS和nRF24E1的智能家居远程监控系统设计

由单片射频收发芯片nRF24E1和短信收发模块TC35组成的智能家居远程监控系统,通过嵌入51单片机内核的单片射频收发芯片nRF24E1构成星形结构网络,采集、处理以及无线收发家居中可能出现的意外情况并利用GSM模块的短消息收发功能,实现远程安防监控和家电控制。