再磨过程的泵池液位和给矿压力双速率区间控制

赤铁矿再磨过程是以矿浆泵频率为输入、以给矿压力为内环输出、以泵池液位为外环输出的强非线性串级工业过程.当赤铁矿粒度分布大范围变化,导致一段磨矿与磁选矿浆流量和再磨排矿流量频繁波动,使泵池液位频繁波动,造成内外环频繁波动.本文将上述动态特性变化用未建模动态来描述,通过设计消除前一时刻未建模动态补偿信号叠加于基于线性模型设计的反馈控制器,采用一步最优前馈控制律和提升技术,提出了泵池液位和给矿压力双速率区间控制算法.给出了所提控制算法的稳定性和收敛性分析,通过半实物仿真实验表明所提出的控制算法可以将处于频繁随机波动的泵池液位和给矿压力变化率控制在目标值范围内....

Full description

Saved in:
Bibliographic Details
Published in自动化学报 Vol. 43; no. 6; pp. 993 - 1006
Main Author 王兰豪 贾瑶 柴天佑
Format Journal Article
LanguageChinese
Published 东北大学流程工业综合自动化国家重点实验室 沈阳110819%东北大学流程工业综合自动化国家重点实验室 沈阳110819 2017
国家冶金自动化工程技术研究中心 沈阳110819
Subjects
PI控制
再磨过程
双速率控制
未建模动态补偿
PI control
Regrinding process
再磨过程
unmodeled dynamic compensation
dual-rate control
双速率控制
PI控制
未建模动态补偿
Online AccessGet full text
ISSN0254-4156
1874-1029
DOI10.16383/j.aas.2017.c170134

Cover

More Information
Summary:赤铁矿再磨过程是以矿浆泵频率为输入、以给矿压力为内环输出、以泵池液位为外环输出的强非线性串级工业过程.当赤铁矿粒度分布大范围变化,导致一段磨矿与磁选矿浆流量和再磨排矿流量频繁波动,使泵池液位频繁波动,造成内外环频繁波动.本文将上述动态特性变化用未建模动态来描述,通过设计消除前一时刻未建模动态补偿信号叠加于基于线性模型设计的反馈控制器,采用一步最优前馈控制律和提升技术,提出了泵池液位和给矿压力双速率区间控制算法.给出了所提控制算法的稳定性和收敛性分析,通过半实物仿真实验表明所提出的控制算法可以将处于频繁随机波动的泵池液位和给矿压力变化率控制在目标值范围内.
Bibliography:Regrinding process; unmodeled dynamic compensation; PI control; dual-rate control
WANG Lan-Hao1, JIA Yao1 ,CHAI Tian-You1, 2（ 1. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang 110819; 2. National Engineering Research Center of Metallurgy Automation, Shenyang 110819）
The regrinding process of hematite is a strong nonlinear cascade process with frequency of slurry pump as the input, feeding pressure as the inner loop output and sump level as the outer loop output. During its operation, frequent fluctuations of first stage grinding, magnetic separation slurry flowrate and discharge regrinded flowrate generated from the distribution of hematite particles which changes in a large range will cause large variations in the sump level and frequent fluctuation between inner and outer loop. In this paper, a novel dual-rate interval controller of sump level and feeding pressure is developed by representing the variations of dynamics characters as the unmodeled dynam
ISSN:0254-4156
1874-1029
DOI:10.16383/j.aas.2017.c170134