摘要
为实现层压器内温度和压力两项物理参数的自动控制,设计了一种新型的层压器控制系统。该系统的测量单元包括铂金电阻(PT100)温度传感器和扩散硅压力传感器,执行机构包括可控硅和智能电动球阀,过程控制由比例积分微分(PID)调节器完成,调节器通过控制执行机构调节温度和压力,从而使温度和压力按照设定的经验工艺曲线变化;此外,为便于分析数据和组成分层系统,设计了上位机软件,按照一定的通讯协议从调节器获取数据和下达指令。在控制现场,采用了临界比例度法和经验凑试法寻找最适合系统的PID参数,并根据上位机记录的实际工作曲线与设定曲线的耦合度分析了运行效果。研究及试验结果表明,该系统的温度设定值与实际值的误差在±1℃以内,压力稳定在±0.02 MPa以内,实际工作曲线与设定曲线基本吻合,系统运行稳定,可以满足工艺需求。
Aiming at automatic control of two physical parameters which include temperature and pressure in laminate device, a new type of laminate device control system, whose measurement unit was consisted of both PT100 temperature sensor and proliferation silicon pressure sensor , executive body was comprised of silicon controlled rectifier（SCR） and intelligent electric ball valve, process control was completed by proportion integration differentiation（PID）regulator which controlled executive body to regulate temperature and pressure , was designed to change both of them on basis of configured experienced craft curve. In addition, PC software which follows fixed communication protocol was designed to acquire data from regulator, and to send instructions to it for convenience of analyzing data and building hierarchical system. In the control filed, the optimum PID parameter was searched by the way of the critical ratio degree and the experiential trial, and the operating effect was analyzed on the basis of the coupling degree between actual work curve recorded by PC software and the rated one. Many experiments result shows that the error between temperature set value and actual one is less than 1 ℃, and pressure could be stabilized in less than 0. 02 MPa, basically actual work curve is consistent with the set curve. These experimental results show that the system runs stably, and can satisfy process requirement.
出处
《机电工程》
CAS
2012年第11期1294-1298,共5页
Journal of Mechanical & Electrical Engineering
关键词
层压器
PID调节器
过零触发
集散控制
参数整定
laminate device
PID regulator
zero-crossing trigger
distributed control
parameter tuning
