基于微分型MRAS模型的速度估算方法
曾樹華1,呂敬祥2,聶小武1,3
(1 湖南鐵路科技職業(yè)技術學院,湖南 株洲 412006; 2 中國科學院電工研究所,北京 100190; 3 中南大學 信息科學與工程學院,湖南 長沙 410016)
摘 要:模型參考自適應(MRAS) 方法一般采用電壓模型來進行磁鏈估計,但電壓模式的純積分環(huán)節(jié)的直流分量一直困擾著MRAS 方法在低速時的控制性能。對電壓模型進行了改進,把輸入改為磁鏈,輸出改為電壓,然后把計算的電壓與測量電壓進行比較從而校正轉速,徹底解決了電壓模型的積分問題。利用Simulink 搭建仿真模型分別在高、低速進行轉速仿真實驗,證明了該模型的觀測轉速效果好。
關鍵詞:速度估算;模型參考自適應;積分誤差;電壓模型
中圖分類號:TM301.2 文獻標識碼:A 文章編號:1007-3175(2016)11-0001-04
Speed Estimation Method Based on Differential Model
Reference Adaptive Control Model
ZENG Shu-hua1, LV Jing-xiang2, NIE Xiao-wu1,3
(1 Hunan Railway College of Science & Technology, Zhuzhou 412006, China;
2 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 School of Information Science and Engineering, Central South University, Changsha 410016, China)
Abstract: The model reference adaptive control (MRAS) method is a common method adopting voltage model to carry out flux linkage estimation, but the direct current component of pure integration element in voltage mode always troubles the control performance of MRAS method at low speed. The voltage model was improved, the input was flux linkage and the output was the voltage, then the calculative voltage was compared with the measuring voltage to adjust the rotate speed, completely solving the integral problem of voltage model. Simulink was used to construct the simulation model to carry out simulated experiments at high and low rotate speed, which proves that this model has good effectiveness to observe rotate speed.
Key words: speed estimation; model reference adaptive control; integration error; voltage model
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