Application Research of Grey Soft Sensor for Charge Ratio of Media

Through analyzing the ball milling process,and based on radiate basis function(RBF) network,a soft sensor method was presented to estimate the ball mill's charge ratio of media(CRM) on line,which couldn't be measured on line in the past.Combining grey relation analysis,a uniform-incidence-degree arithmetic was proposed to determine the secondary variables of soft sensor.Simulation results show that the mean relative error of the soft sensing method is less than 0.7% and can meet the practical demands.Meanwhile,uniform incidence degree arithmetic can exactly obtain the correlation between variables,which is an effective way to select secondary variables.