COREX煤气压缩系统混合模型研究  

Research of Hybrid Model for COREX Gas Compression System

作　　者：董世建[1] 牛大鹏[1,2] 梁倩[2] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819 [2]东北大学流程工业综合自动化国家重点实验室,辽宁沈阳110819

出　　处：《控制工程》2013年第2期362-367,共6页Control Engineering of China

基　　金：国家自然科学基金项目(61074074);973计划子课题(2009CB320601)

摘　　要：在分析COREX煤气压缩系统各组成部件的工作原理基础上,根据流体力学、能量守恒和质量守恒等物理学原理,建立COREX煤气压缩系统机理模型。将COREX煤气压缩系统机理模型的参数辨识问题转化为优化问题,采用差分进化算法辨识机理模型中的未知参数。由于COREX煤气压缩系统存在较多的影响因素,机理模型预测性能不精确。基于多最小二乘支持向量机补偿机理模型的误差,建立预测COREX煤气压缩系统性能的混合模型。将混合模型应用于实际的煤气压缩系统中,结果表明与机理模型相比混合模型有更高的精度和预测性能。为控制COREX煤气压缩系统稳定运行奠定了良好的基础。According to the analysis of each component of COREX gas compression system, based on fluid mechanics, energy conser vation and mass conservation principles, a mechanism model of COREX gas compression system is established. Transforming parameter identification problem of the gas compression system model into an optimization problem, differential evolution algorithm is used to iden tify the unknown parameters of the model. Since COREX gas compression system has many influence factors, the mechanism model is not accurate enough. Based on multiple least squares support vector machine to compensate for the error, which could not be revealed by the mechanism model, the hybrid model for performance prediction of the COREX gas compression system is established. Applying the hybrid model to practical gas compression system, simulation analysis is verified that hybrid method is more effective in comparison with the mechanism model , which lays a solid foundation for control of the steady operation of the COREX gas compression system.

关 键 词：煤气压缩系统 机理模型 参数辨识 混合模型 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]