摘要
针对采用PID控制方式的自动核子皮带秤存在最佳PID参数难以确定、过冲震荡、控制精度差的缺点,研究基于核子皮带秤的物料流量精确控制的方法。利用物质对γ射线吸收的物理关系、流量与速度的关系,推导得到皮带速度与皮带机负荷和物料流量之间关系的数学模型,根据核子皮带秤的结构特点设计延后控制的动态矩阵,从而实现自动核子皮带秤的物料流量精确控制。实践应用表明:使用该算法控制的自动核子皮带秤物料流量控制准确度≤±1%,而且控制稳定性好,无过冲震荡。
The arithmetic used in precise control of material flow based on nucleonic belt weigher has been researched in this article for solving the problems of nucleonic belt weighers controlled by PID including the optimal PID parameters is difficult to determine,overshoot shocks and poor control precision.The mathematical model of relation between belt speed and belt conveyor load,material flow is built according to physical principle of material absorption in γ-ray and relationship between flow and speed.The delay control dynamic matrix has been designed based on the structure features of belt conveyor and then precise control of material flow on automatic nucleonic belt weigher is achieved.Practice indicates that the control precision of material flow on automatic nucleonic belt weigher controlled by this arithmetic is in the range of ±1% and the system can get an excellent stability and has no overshoot shock.
出处
《中国测试》
CAS
北大核心
2012年第6期57-59,63,共4页
China Measurement & Test
关键词
自动控制技术
流量控制
核子皮带秤
算法
automatic control technology
flow control
nucleonic belt weigher
arithmetic
