摘要
针对海洋蛋白酶(marine protease,MP)发酵过程中某些关键参量难以在线检测,离线测量存在大滞后、易染菌的问题,提出了一种基于改进的粒子群-径向基神经网络(PSO-RBFNN)的MP发酵过程软测量建模方法。首先采用指数下降惯性权重(exponential decreasing inertia weight,EDIW)策略对粒子群算法进行改进,克服了固定惯性权重和自适应惯性权重的粒子群算法易于陷入局部极小,进化后期收敛速度慢以及全局搜索能力弱的缺点;然后,采用改进后的粒子群算法对径向基神经网络连接权值进行在线优化,确定RBFNN拓扑结构;最后,根据MP发酵过程的输入/输出向量构建RBFNN软测量模型。实验仿真结果表明,EDIW策略改进的PSO-RBFNN软测量模型训练时间缩短了40%左右,模型预测精度提高了3%以上。
Some key parameters in the fermentation process of marine protease(MP)are difficult to be detectedonline.There is the existence of large time-delay and easily stained bacteria in off-line measurement.A soft sensormodeling method based on the improved PSO-RBFNN in the MP fermentation process was proposed.Firstly,exponential decreasing inertia weight(EDIW)strategy was used to improve PSO algorithm,and overcome thedisadvantages that PSO with fixed inertia weight and adaptive inertia weight is easy to fall into the local minimum,the convergence rate is slow in late evolution and the global search ability is weak.Then the improved PSO algorithmwas used to optimize the connection weight of RBFNN,and the RBFNN topology was successively determined.Finally,the RBFNN soft sensor model was constructed according to the input/output vector of MP fermentationprocess.The simulation results showed that the training time of the EDIW-PSO-RBFNN model was reduced by atleast(about)40%,and the prediction accuracy of model was improved by more than3%.
作者
朱湘临
凌婧
王博
郝建华
丁煜函
ZHU Xianglin;LING Jing;WANG Bo;HAO Jianhua;DING Yuhan(College of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;Open Laboratory of Marine Enzyme & Enzyme Engineering, Yellow Sea Fisheries Research Institute, Qingdao 266071, Shandong, China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2018年第3期1221-1227,共7页
CIESC Journal
基金
国家自然科学基金面上项目(41376175)
江苏省自然科学基金项目(BK20140568,BK20151345)
江苏省高校自然科学研究面上项目(14KJB510007)
江苏高校优势学科建设工程资助项目(PAPD)
