共查询到19条相似文献,搜索用时 218 毫秒
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采用原始静态变形抗力模型,并考虑入口、出口弹性变形轧制力对模型的道次影响系数,进行计算优化,建立了1个优化的变形抗力模型。2种模型的对比表明,优化的模型精度更高,提高了轧制力的计算精度。 相似文献
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提出一种带钢热连轧精轧机组负荷分配的优化计算策略,采用多目标优化算法离线计算确定精轧各机架的轧制力分配系数,采用"压下模式+轧制力模式"相结合的方式实现负荷分配在线计算。为了确定各精轧机架的轧制力分配系数,建立兼顾轧制功率最小、负荷均衡与板形良好的负荷分配多目标优化模型;为了实现负荷分配在线计算,根据压下模式负荷分配计算确定厚度分配的初始值,根据CLAD算法进行轧制力模式负荷分配迭代计算,最后采用压下模式分配计算确定的压下率分布范围对轧制力模式分配结果进行限幅处理。新方法已成功应用于梅钢1 780mm热连轧生产线,在线应用表明该方法可以有效减少操作工干预,提高带钢精轧过程的轧制稳定性。 相似文献
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采用混合摩擦模型预报冷轧薄板轧制力 总被引:16,自引:2,他引:14
作采用包括粘着摩擦和滑动摩擦在内的混合摩擦模型,研究了冷轧薄板轧制力预报问题,建立了轧制力预报新模型。用新模型对实际生产数据进行了计算,并将理论预报值与实测值和MDStone公式计算结果进行对比,验证了新模型的正确性。 相似文献
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轧制力计算有多种模型,大多存在计算繁琐、工作效率低下的问题。通过对冷连轧多种轧制力计算模型的对比研究,针对中、薄板带钢大压下率的M.D.Stone计算模型,采用最小二乘法对轧制力进行曲线拟合,找出一种便捷的算法——轧制力曲线拟合算法,通过一般的计算器或程序即可对轧制力进行求解。应用效果表明,该算法能使轧制力预报精度和计算效率大幅提高,为轧制力预报提供了一条更加便捷、可靠的途径。 相似文献
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为了进一步提高热连轧精轧机组轧制力的设定精度,采用小波神经网络建立轧制力预报模型。并采用改进的快速BP算法来训练网络。仿真结果表明:建立的轧制力预报模型的预报值与实际值之间的相对误差在±6%以内,且学习算法收敛速度快。 相似文献
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冷连轧高速轧制过程中摩擦因数机理模型的研究 总被引:2,自引:0,他引:2
在现场试验与理论分析的基础上,针对现有摩擦模型对冷连轧高速轧制过程中摩擦因数的预报精度不高、通用性不强等问题,首先对润滑油膜厚度计算模型与摩擦因数返算方法进行了推导,然后定量研究了辊缝中润滑油膜厚度与摩擦因数之间的关系,最终建立起一套适合冷连轧高速轧制的摩擦因数机理模型,并将其应用于宝钢冷轧薄板厂1220五机架冷连轧机与宝钢冷轧厂2030五机架冷连轧机的生产实践.应用结果表明:提高了轧制的稳定性与带材的控制精度,减小了相关模型的自学习与自适应系数波动,取得了良好的使用效果. 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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In cold strip rolling control system, rolling force and forward slip are the prerequisites for the model setting calculation, and the deformation resistance and friction coefficient are the main parameters that affect their predictions. A new method based on objective function is first proposed in this paper to improve the calculation accuracy of rolling force and forward slip, and the deformation resistance and friction coefficient are taken as optimisation variables. Using the multi-population co-evolutionary algorithm to solve the objective function, the required rolling force and forward slip are obtained. The pre-set values of rolling force and roller line speed are compared with the actual measured ones in a 1450?mm five-stand tandem cold mill and other researcher’s method. Results show that the calculated values are in fair agreements with the on-line measured ones, and the thickness and flatness accuracy of the final product are improved. 相似文献
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The rolling force model for cold tandem mill was put forward by using the Elman dynamic recursive network method,based on the actual measured data.Furthermore,a good assumption is put forward,which brings a full universe of discourse self-adjusting factor fuzzy control,closed-loop adjusting,based on error feedback and expertise into a rolling force prediction model,to modify prediction outputs and improve prediction precision and robustness.The simulated results indicate that the method is highly effective and the prediction precision is better than that of the traditional method.Predicted relative error is less than ±4%,so the prediction is high precise for the cold tandem mill. 相似文献
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