森林消防车发动机电控系统故障诊断方法研究

2021-08-23 09:14:39贺子祺储江伟周桓宇
森林工程 2021年4期
关键词:故障诊断

贺子祺 储江伟 周桓宇

摘 要:针对森林消防车发动机电控系统故障诊断问题,本文设计了基于数据融合的森林消防车电控发动机故障诊断方法。该方法诊断模型由基于反向传播神经网络(Back Propagation,简称为 BP)的数据融合方法、基于概率神经网络(Probabilistic Neural Network,简称为PNN)的分类方法和基于DS(Dempster/Shafer,简称为DS)证据理论的决策融合方法组成。首先,根据原始数据样本训练BP神经网络以达到原始数据融合的目的,而后分别对经过数据融合的原始数据和未经数据融合的原始数据进行基于KL(Karhunen Loéve)变换的特征提取。然后,使用特征提取后的数据训练概率神经网络,并使用训练好的网络验证测试样本。最后,采用DS证据理论对初步诊断结论进行决策级融合。研究结果表明,基于数据融合和概率神经网络的方法可有效地提高森林消防车电控系统的故障诊断精度。

关键词:概率神经网络; 数据融合; DS证据理论; 电控发动机; 故障诊断

中图分类号:S    文献标识码:A   文章编号:1006-8023(2021)04-0087-07

Research on Fault Diagnosis Method of Electronic Control System

of Forest Fire Engine

HE Ziqi1, CHU Jiangwei1*, ZHOU Huanyu2

(1.School of Traffic and Transportation, Northeast Forestry University, Harbin 150040, China;

2.College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China)

Abstract:Aiming at the problem of fault diagnosis of electronically controlled engine of forest fire truck, this paper designed a fault diagnosis method of electronically controlled engine of forest fire trunk based on data fusion. The diagnosis model of this method consisted of data fusion method with BP neural network, classification method by probabilistic neural network and decision fusion method based on D-S evidence theory. First of all, the BP neural network trained by the data samples was to achieve the purpose of original data fusion. Next, the data with and without data fusion was performed a feature extraction operation by K-L transform. Then, the data after feature extraction was used to train the probabilistic neural network, and the trained network was used to verify the test samples. Finally, the D-S evidence theory was used to fuse the preliminary diagnosis conclusion at the decision level. The simulation results showed that the method based on data fusion and probabilistic neural network can effectively improve the fault diagnosis accuracy of the electronic control system for forest fire truck.

Keywords:Probabilistic neural network; data fusion; D-S evidence theory; electronically controlled engine; fault diagnosis

收稿日期:2021-03-01

基金項目:国家大学生创新创业项目 (202010225172)

*通信作者:储江伟,博士,教授。 研究方向为电控故障诊断。 E-mail: cjw_62@163.com

引文格式:贺子祺,储江伟,周桓宇. 森林消防车发动机电控系统故障诊断方法研究[J]. 森林工程,2021,37(4):87-93.

HE Z Q, CHU J W, ZHOU H Y. Research on fault diagnosis method of electronic control system of forest fire engine[J]. Forest Engineering, 2021,37(4):87-93.

0 引言

森林火灾作为四大森林灾害之首,对我国森林保护及林业经济具有潜在的巨大威胁。森林消防车作为当前森林灭火的主要工具,确保其运行过程中各个性能指标处于正常状态,是保证森林火情发生时能有效地抑制火情蔓延、减小林业资源损失的前提。……

登录APP查看全文

猜你喜欢
故障诊断
基于包络解调原理的低转速滚动轴承故障诊断
一重技术(2021年5期)2022-01-18 05:42:10
ILWT-EEMD数据处理的ELM滚动轴承故障诊断
水泵技术(2021年3期)2021-08-14 02:09:20
冻干机常见故障诊断与维修
基于EWT-SVDP的旋转机械故障诊断
数控机床电气系统的故障诊断与维修
电子制作(2018年10期)2018-08-04 03:24:46
基于改进的G-SVS LMS 与冗余提升小波的滚动轴承故障诊断
改进的奇异值分解在轴承故障诊断中的应用
基于LCD和排列熵的滚动轴承故障诊断
基于KPCA和PSOSVM的异步电机故障诊断
基于WPD-HHT的滚动轴承故障诊断
机械与电子(2014年1期)2014-02-28 02:07:31