湿式离合器磨合过程的多重分形谱预测
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摘要
针对湿式离合器试验过程中磨合状态的预测问题,结合试验过程中摩擦转矩信号的几何结构特征,提出利用多重分形谱及其参数来预测磨合状态的新方法。阐述了基于盒计数法计算多重分形谱的方法;给出了多重分形谱参数的定义及其与摩擦转矩信号之间的内在联系;利用多重分形谱及其参数对某型号湿式离合器磨合过程的摩擦转矩信号进行分形表征。分析结果表明:多重分形谱及其参数能够定量地刻画试验过程中摩擦转矩信号的几何特征,并且随着磨合过程的进行,谱宽、最大最小概率子集分形维数差及谱偏斜度都呈现逐渐减小趋势,而最小奇异指数则呈现逐渐增大趋势。因此,利用试验中摩擦转矩信号的多重分形谱能够有效地预测湿式离合器的磨合状态。
For predicting the running-in process of wet clutch test,a method based on multifractal spectrum and its parameters are proposed to predict the running-in state,combining with the geometry features of friction torque signal in test.Firstly,the concept of multifractal spectrum based on the box-counting method is introduced;and then the inherent relationship between the multifractal parameters and friction torque is discussed;finally,friction torque signals from a certain type wet clutch running-in test are analyzed and depicted by the multifractal spectrum and its parameters.The analytical results show that the geometry features of friction torque signals can be quantitatively described through multifractal spectrum and its parameters,and the breadth and fractal dimension difference of maximum-minimum probability subset of multifractal spectrum gradually decrease with the running-in process,while the minimum singularity exponent increases gradually with the running-in process.Therefore the running-in state of wet clutch can be effectively predicted by the multifractal spectrum of friction torque in test.
引文
[1]林腾蛟,张世军,吕和生.湿式摩擦离合器流道结构对油压分布的影响[J].重庆大学学报,2010,33(3):13-18.LIN TENG-JIAO,ZHANG SHI-JUN,LV HE-SHENG.Analysis of oil pressure distribution influenced by channelflow structure of wet friction clutch[J].Journal ofChongqing University,2010,33(3):13-18.
    [2]王立勇,马彪,郑长松,等.基于油液检测的综合传动台架磨合期磨损规律研究[J].润滑与密封,2008,33(7):35-38.WANG LI-YONG,MA BIAO,ZHENG CHANG-SONG,et al.A study on running-in wear of power-shiftsteering transmission based on oil monitoring[J].Lubrication and Engineering,2008,33(7):35-38.
    [3]孙涛,马彪,王立勇,等.基于光谱分析的综合传动台架磨合试验方法研究[J].机械设计,2008,25(6):39-41.SUN TAO,MA BIAO,WANG LI-YONG,et al.Researchon grinding-in testing method of synthetic transmissionplatform based on spectrum analysis[J].Journal ofMachine Design,2008,25(6):39-41.
    [4]ZHU H,GE S R,HUANG X L,et al.Experimental studyon the characterization of worn surface topography withcharacteristic roughness parameter[J].Wear,2003,255(1/6):309-314.
    [5]DU G X,NING X X.Multifractal properties of Chinesestock market in Shanghai[J].Physica A,2008,387(1):261-269.
    [6]CHAUDHARI A,SANDERS C C,LEE S L.Multifractal analysis of growing surfaces[J].AppliedSurface Science,2004,238(8):513-517.
    [7]朱华,葛世荣.摩擦力和摩擦振动的分形行为研究[J].摩擦学学报,2004,24(5):433-437.ZHU HUA,GE SHI-RONG.Study on the fractalbehaviors of frictional forces and vibrations[J].Tribology,2004,24(5):433-437.
    [8]李国宾,段树林,于洪亮,等.发动机振动信号特征参数的多重分形研究[J].内燃机学报,2008,26(1):87-91.LI GUO-BIN,DUAN SHU-LIN,YU HONG-LIANG,et al.Study on characteristic parameters of enginevibration signal based on multifractal[J].Transactionsof CSICE,2008,26(1):87-91.
    [9]李国宾,关德林.振动信号多重分形分析改进算法[J].测试技术学报,2006,20(6):543-548.LI GUO-BIN,GUAN DE-LIN.The improvedmultifractal analysis algorithm for vibration signal[J].Journal of Test and Measurement Technology,2006,20(6):543-548.
    [10]GE S R,CHEN G A,ZHANG X Y.Fractalcharacterization of wear particle accumulation in thewear process[J].Wear,2001,251(1/12):1227-1233.
    [11]ARTDE D K.Multifractal spectra of INGaN/GaN self-Assembled quantum dots films[J].Journal ofNanotechnology in Engineering and Medicine,2010,1(3):1-7.
    [12]LIU C,JIANG X L,LIU T,et al.Multifractal analysisof the fracture surfaces of foamed polypropylene/polyethylene blends[J].Applied Surface Science,2009,255(11):4239-4245.
    [13]钟明寿,龙源,谢全民,等.基于分形盒维数和多重分形的爆破地震波信号分析[J].振动与冲击,2010,29(1):7-11.ZHONG MING-SHOU,LONG YUAN,XIE QUAN-MIN,et al.Signal analysis for blasting seismic wavebased on fractal box-dimension and multi-fractal[J].Journal of Vibration and Shock,2010,29(1):7-11.
    [14]彭志科,何永勇,卢青,等.小波多重分形及其在振动信号分析中应用的研究[J].机械工程学报,2002,38(8):59-63.PENG ZHI-KE,HE YONG-YONG,LU QING,et al.Wavelet multifractal spectrum:application to analysisvibration signals[J].Chinese Journal of MechanicalEngineering,2002,38(8):59-63.
    [15]李平,胡可乐,汪秉洪.多重分形谱在材料分析中的应用研究[J].南京航天航空大学学报,2004,34(1):77-81.LI PING,HU KE-LE,WANG BING-HONG.Designand application about computing program of materialmultifractal spectrum[J].Journal of NanjingUniversity of Aeronautics&Astronautics,2004,34(1):77-81.
    [16]YU H S,SUN X,LUO S F,et al.Multifractal spectraof atomic force microscope images of amorphouselectroless Ni-Cu-P alloy[J].Applied Surface Science,2002,191(3):123-127.

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