摘要
电液伺服阀作为液压伺服系统的核心部件,其性能好坏将直接影响整个液压系统的稳定性和控制精度。具体分析了某型双喷嘴挡板型电液伺服阀的工作原理,建立了液压仿真模型。通过调整模型参数进行故障模拟,进而获取故障数据。最后分别采用支持向量机(SVM)、主元分析法-支持向量机(PCA-SVM)和小波包能量特征向量-支持向量机(WPEE-SVM)进行故障分类。综合比较分类精度和速度表明,PCA-SVM是最佳诊断算法。
The electro-hydraulic servo valve, as the core component of hydraulic servo system, its performance directly affects the stability and control accuracy of the whole servo system. The principle of a dual nozzle-flapper type electro-hydraulic servo valve is analyzed specifically, and the hydraulic simulation emulated model is built, through adjusting parameters of the model, the fauh emulation is conducted and then to acquire fault data; in addition, the faults are classified by using SVM, PCA-SVM, and WPEE-SVM respectively. Through comparing the accuracy and soeed of classification. PCA-SVM is the best diagnostic method.
出处
《自动化仪表》
CAS
北大核心
2013年第1期21-24,27,共5页
Process Automation Instrumentation
关键词
电液伺服阀
PCA
SVM
控制精度
故障诊断
Electro-hydraulic servo valve Principal component analysis （PCA） SVM Control accuracy Fault diagnosis
