基于一种改进灰关联分析的双进双出钢球磨制粉出力软测量建模

Soft sensor modeling for mill output of duplex inlet & outlet ball pulverizer system based on an improved grey relational analysis

由于双进双出钢球磨直吹式制粉系统出力较难直接测量,且影响因素较多。本文将一种改进的灰关联分析用于双进双出钢球磨制粉系统中,得出了各辅助变量对制粉出力影响的灰关联度,忽略次要因素,建立了制粉系统出力的软测量模型,并实现了模型的降维。仿真结果表明,降维后的软测量模型的学习速度和收敛速度均较好,为模型在制粉系统中的在线应用打下良好的基础。

The mill output of duplex inlet and outlet ball pulverizer system is difficult to be measured directly,and the impact factors of mill output are numerous.An improved gray relational analysis method is used to analyze the duplex inlet and outlet ball mill system,and the gray relational grade of every instrumental variable that affects the mill output is obtained.Ignoring minor factors,a soft sensor model of the mill system is established,and the model dimensionality reduction is implemented.The two models（before and after grey relational analysis） are compared with each other.Simulation results show that the learning speed and convergence rate of the dimension reduction model are better.This will lay a good foundation for the model online application in pulverizing systems.