再磨过程的泵池液位和给矿压力双速率区间控制

发布时间：2018-10-16 11:52

【摘要】：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.
[Abstract]:Hematite regrinding process is a strongly nonlinear cascade industrial process with slurry pump frequency as input, ore pressure as inner loop output and pump tank liquid level as output. When the size distribution of hematite varies in a wide range, the flow rate of primary grinding and magnetic separation slurry and regrinding discharge flow fluctuate frequently, and the liquid level of pump pool fluctuates frequently, resulting in frequent fluctuation of inner and outer rings. In this paper, the above dynamic characteristic changes are described by unmodeled dynamics, and the feedback controller based on linear model is designed to eliminate the unmodeled dynamic compensation signals at the previous moment. The one-step optimal feedforward control law and lifting technique are adopted. A dual rate interval control algorithm for pump level and feed pressure is proposed. The stability and convergence analysis of the proposed control algorithm are given. The results of hardware-in-the-loop simulation show that the proposed control algorithm can control the level of pump pool and the rate of change of feed pressure which are in frequent random fluctuations within the target range.
【作者单位】：东北大学流程工业综合自动化国家重点实验室;国家冶金自动化工程技术研究中心;
【基金】：国家高技术研究发展计划(863计划)(2015AA043802)资助~~
【分类号】：TD921.4;TP273

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