BP神经网络的软测量和软件仿真讲解.doc

PAGE  PAGE 25 摘要 软测量是一门新兴的工业技术,其原理是通过数学模型计算工程上难以检测以及无法检测的信号， 很多过程工业非线性比较严重,如果用常规的非线性建模将使算法相当复杂,而神经元网络能够以任意精度逼近任意非线性映射,在解决高度非线性和严重不确定性系统建模与控制方面具有巨大的潜力。因此,利用神经网络建立软测量模型越来越引起工程技术人员的关注。 本文在介绍基于神经网络软测量技术的基础上，采用VC++6.0设计了基于BP神经网络的软测量 和仿真软件，其输入和输出个数可根据具体工艺需要方便的修改，便于软测量在工程应用中推广。文中最后采用Matlab软件设计了仿真程序，以一个2输入1输出非线性模型为例进行了仿真，并给出了训练和仿真结果。 关键词: Matlab； 软测量技术； VC++6.0； 神经网络 Abstract Soft-sensing technique is a newly booming industry technology. Its theory is to calculate the signal in engineering field, which is hard or incapable to check, with mathematical model. The non-linear is very serious in a lot of processing industry. The algorithm will be very complex if normal non-linear model is used. However, Neural network, which has great potential in high non-linear solution and serious undefined system model construction and control, could come to non-linear image with any accuracy. So more and more industry engineers pay much attention to set up the soft-sensing model with neural network. A general neural network soft-sensing technology is introduced in this paper. In this base, BP neural network Soft-sensing and simulation software is designed using VC++6.0.And the number of input/output parameter can be modified in the field of engineering .It is designed and simulated in Matlab using the non-linear model with two Input parameter and one output parameter. The training and the simulation results is given in the end. Key words : 　 Matlab； Soft-sensing technique； VC++6.0； Neural network 目录 软测量的概述………………………………..1 软测量的技术发展………………………………………1 本文研究的内容和研究方法………………………………2 基于神经网络的软测量模型建立 2.1 软测量原理………………………………………………4 2.2 神经网络在软测量中的应用……………………………….4 2.2.1神经网络原理…………………………………………5 2.2.2神经网络软测量模型建立………………………………5 基于神经网络的软测量软件设计 3.1 软件开发工具选用……………………………………………….7 3.2 软件设计方法…………………………………………………...7 3.3 各模块的功能及实现……………………………………………. 7 软测量仿真研究……………………………..16 4.1仿真方法…………………………………………………16 4.2 仿真结果及分析………………………………………….16 4.3 小结…………………………………………………….20 结束语………………………………………..21 参考文献……………………………