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基于模糊聚类分析的冷连轧负荷分配修正 总被引:1,自引:0,他引:1
由于冷连轧负荷分配优化的数学模型精度不高,使得将负荷分配优化的结果直接用于生产过程中往往达不到最优,甚至会影响生产.为此提出使用基于模糊等价关系的模糊聚类分析法,利用现场实际使用的负荷分配对优化结果进行修正,使修正结果既能达到最优化,又能满足生产.以等功率负荷分配和等相对功率负荷分配为例,进行了修正前后的对比,获得了很好的效果.实践证明这种方法是有效的,为提高负荷分配的精度提供了一种修正措施. 相似文献
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在热连轧的非稳态轧制过程中,负荷分配不均会导致板形控制精度的下降.针对负荷分配不合理的情况,以传统机理模型为基础,建立了板形和轧制均衡的目标函数,开发了改进快速非支配排序遗传算法(NSGA-Ⅱ)的负荷分配智能优化方法,利用该优化算法对热连轧精轧机组进行了负荷分配优化.通过工业试验将经验法、GA与NSGA-Ⅱ优化得出的负荷分配数据进行对比,发现采用新方法的优化结果明显比经验法更合理,GA和NSGA-Ⅱ的优化结果将机架F5和F6相对凸度误差从4.63%分别降低至1.06%和0.79%,且NSGA-Ⅱ在末机架的相对凸度差为-0.000 009 88,小于GA的-0.000 050 47.应用结果表明,该负荷分配优化算法明显优于GA,对非稳态轧制过程中的负荷分配优化及板形控制具有理论指导意义和实际应用价值. 相似文献
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针对热连轧精轧机组负荷分配优化问题的特点,将遗传算法与序列二次规划法相结合,构成用于优化该问题的混合遗传算法.该算法通过改进遗传算子与序列二次规划算法结合,提高了局部搜索的速度和求解质量.根据模型仿真验证,该算法提高了收敛速度和求解精度,保证了全局收敛性,在热连轧精轧机组负荷分配优化中作用是有效的. 相似文献
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Load distribution is the foundation of shape control and gauge control, in which it is necessary to take into account the shape control ability of TCM (tandem cold mill) for strip shape and gauge quality. First, the objective function of generalized shape and gauge decoupling load distribution optimization was established, which considered the rolling force characteristics of the first and last stands in TCM, the relative power, and the TCM shape control ability. Then, IGA (immune genetic algorithm) was used to accomplish this multi objective load distribution optimization for TCM. After simulation and comparison with the practical load distribution strategy in one tandem cold mill, generalized shape and gauge decoupling load distribution optimization on the basis of IGA approved good ability of optimizing shape control and gauge control simultaneously. 相似文献
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Based on rolling feature of continuous tandem cold rolling mill, such as multi-variable, strong coupling, non-linear, analyze and set the equal relative load, preventing slippage and profile well as the multi-objective optimization goal, BP neural network with self-learning function is adopted to replace traditional rolling force models and then Levenberg-Marquardt algorithm is adopted to predict the rolling force. Then use multi-objective fuzzy theory to solve the problem of multi-objective optimization of tandem cold rolling schedule. With the example of 1370mm tandem cold rolling, the rolling schedule of the common rolling, the single-object optimization design and the multi-objective fuzzy optimization design are compared with each other, optimization result shows the proposed optimization method decreases the value of three objective functions simultaneous. The performance of the optimal rolling schedule is satisfying and it is promising. 相似文献
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在考虑轧机设备能力限制、提高产量和产品质量、减少能耗的基础上,建立了按功率最大化轧制策略的冷连轧机轧制负荷分配优化数学模型,并开发了MATLAB程序.通过仿真实例证明,该算法计算速度快、精度高,克服了传统的负荷分配模型中求解非线性方程组时对初值要求苛刻、计算速度慢的缺点,适用于冷连轧机初始压下分配和轧制规程的离线模拟计... 相似文献