北京工业大学学报
北京工業大學學報
북경공업대학학보
JOURNAL OF BEIJING POLYTECHNIC UNIVERSITY
2015年
9期
1296-1301
,共6页
王民%刘国付%昝涛%姚子良
王民%劉國付%昝濤%姚子良
왕민%류국부%잠도%요자량
磨削颤振%频谱能量百分比%控制图%颤振预测
磨削顫振%頻譜能量百分比%控製圖%顫振預測
마삭전진%빈보능량백분비%공제도%전진예측
grinding chatter%spectral energy ratio%control chart%chatter prediction
为了预测磨削过程中颤振的发生,提出一种基于休哈特控制图的磨削颤振预测方法。该方法基于统计质量控制中所遵循的“Kσ”原则来绘制颤振传感信号特征量的控制图,以监测识别磨削振动中不稳定性信号成分,达到快速准确预测磨削颤振的目的。首先,根据磨削加工过程中颤振信号的频谱分析得到颤振发生的敏感频段,以该频段能量占整个分析频段能量的百分比作为颤振特征量。然后,以平稳磨削过程振动信号的颤振特征量为统计特性值绘制控制图,并计算其均值和方差,进而得到控制图的上、下控制界限值。最后,利用控制图的判断准则对统计特性值是否发生异常波动进行判别,从而实现颤振预测。实验结果表明:基于控制图的磨削颤振预测方法能够准确地预测颤振的发生。
為瞭預測磨削過程中顫振的髮生,提齣一種基于休哈特控製圖的磨削顫振預測方法。該方法基于統計質量控製中所遵循的“Kσ”原則來繪製顫振傳感信號特徵量的控製圖,以鑑測識彆磨削振動中不穩定性信號成分,達到快速準確預測磨削顫振的目的。首先,根據磨削加工過程中顫振信號的頻譜分析得到顫振髮生的敏感頻段,以該頻段能量佔整箇分析頻段能量的百分比作為顫振特徵量。然後,以平穩磨削過程振動信號的顫振特徵量為統計特性值繪製控製圖,併計算其均值和方差,進而得到控製圖的上、下控製界限值。最後,利用控製圖的判斷準則對統計特性值是否髮生異常波動進行判彆,從而實現顫振預測。實驗結果錶明:基于控製圖的磨削顫振預測方法能夠準確地預測顫振的髮生。
위료예측마삭과정중전진적발생,제출일충기우휴합특공제도적마삭전진예측방법。해방법기우통계질량공제중소준순적“Kσ”원칙래회제전진전감신호특정량적공제도,이감측식별마삭진동중불은정성신호성분,체도쾌속준학예측마삭전진적목적。수선,근거마삭가공과정중전진신호적빈보분석득도전진발생적민감빈단,이해빈단능량점정개분석빈단능량적백분비작위전진특정량。연후,이평은마삭과정진동신호적전진특정량위통계특성치회제공제도,병계산기균치화방차,진이득도공제도적상、하공제계한치。최후,이용공제도적판단준칙대통계특성치시부발생이상파동진행판별,종이실현전진예측。실험결과표명:기우공제도적마삭전진예측방법능구준학지예측전진적발생。
To predict the grinding chatter, a prediction method of grinding chatter based on Shawkart control chart is proposed. To predict the grinding chatter quickly and accurately, this method draws the control chart of chatter sensing signal feature based on “Kσ” principle of statistical quality control to monitor the unstable signal component. First, according to the chatter signal's spectral analysis of grinding process, the sensitive frequency band of chatter was obtained. The percentage of the sensitive frequency band energy accounted for the entire analyzed band energy was regarded as chatter characteristic value. Then, the chatter characteristic values of stable grinding process vibration signals were treated as statistical characteristic values to draw control chart. By calculating mean and variance of the statistical characteristic values, the upper and lower control limits of control chart were calculated. Finally,the rules of control chart were used to distinguish whether the abnormal fluctuation of statistical characteristic values occurred. In this way, the chatter was predicted. Experimental results show that the prediction method of grinding chatter based on control chart can predict the occurrence of chatter accurately.