發(fā)布時間：2018-01-15 02:25

  本文關(guān)鍵詞：無刷直流電機輸出轉(zhuǎn)矩的非線性偏最小二乘回歸估計　出處：《電工技術(shù)學報》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 無刷直流電機 轉(zhuǎn)矩估計 直接轉(zhuǎn)矩控制 非線性偏最小二乘

【摘要】：針對無刷直流電機直接轉(zhuǎn)矩控制系統(tǒng)中,電機輸出轉(zhuǎn)矩估計或觀測存在需檢測電機狀態(tài)信號難以精確地檢測、觀測或計算等不可避免的難題,提出一種利用電機線電流和轉(zhuǎn)速兩個易檢測信號進行電機輸出轉(zhuǎn)矩估計的方法。該方法首先基于拉丁超立方抽樣方法確定建模數(shù)據(jù),確保離散數(shù)據(jù)的可靠性;然后通過核函數(shù)將建模數(shù)據(jù)中的自變量變換到特征空間,將自變量與因變量之間的非線性關(guān)系在特征空間中線性地展開;最后在特征空間中利用偏最小二乘回歸方法建立電機輸出轉(zhuǎn)矩的估計模型。通過對轉(zhuǎn)矩估計精度和控制系統(tǒng)性能進行分析及實驗驗證,證明了所提轉(zhuǎn)矩估計方法能準確地估計電機輸出轉(zhuǎn)矩,確保電機直接轉(zhuǎn)矩控制系統(tǒng)的性能,該方法具有較強的實用性。
[Abstract]:In the direct torque control system of brushless DC motor, there are some unavoidable problems such as estimating or observing the output torque of the motor, which is difficult to detect, observe or calculate the motor state signal accurately. This paper presents a method to estimate the output torque of the motor by using two easily detectable signals: linear current and rotational speed. Firstly, the modeling data are determined based on Latin hypercube sampling to ensure the reliability of discrete data. Then the independent variables in the modeling data are transformed into the feature space by the kernel function, and the nonlinear relations between the independent variables and the dependent variables are expanded linearly in the feature space. Finally, the estimation model of motor output torque is established by using partial least square regression method in the feature space. The precision of torque estimation and the performance of control system are analyzed and verified by experiments. It is proved that the proposed torque estimation method can accurately estimate the output torque of the motor and ensure the performance of the motor direct torque control system.
【作者單位】： 道路災變防治及交通安全教育部工程研究中心;工程車輛安全性設(shè)計與可靠性技術(shù)湖南省重點實驗室;長沙理工大學汽車與機械工程學院;
【基金】：國家自然科學基金項目(51675057) 長沙理工大學道路災變防治及交通安全教育部工程研究中心開放基金項目(kfj110304) 交通運輸部應用基礎(chǔ)研究項目(2013319825090)資助
【分類號】：TM33
【正文快照】： 0引言無刷直流電機(Brushless DC Motor,BLDCM)具有能量密度大、控制簡單、運行穩(wěn)定、調(diào)速性能好等優(yōu)點,已被廣泛應用于各領(lǐng)域[1]。為了提高控制系統(tǒng)的動態(tài)特性,降低轉(zhuǎn)矩波動,近年來無刷直流電機的直接轉(zhuǎn)矩控制(Directed Torque Control,DTC)已成為電機控制研究的重點內(nèi)容。注

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本文編號：1426391