摘要
利用基于关联维数的相位随机化的替代数据算法,对不同键合压力下超声换能系统中换能杆末端轴向振动的实测数据进行正确替代,并用非线性动力学的理论来检验其是否具有非线性。通过实验对所测振动时间序列的关联维数进行计算,结果表明在实际键合过程中,不同键合压力下变幅杆末端轴向振动都具有非线性成分。这有利于更好地认识超声引线键合换能系统,并为进一步利用非线性时间序列分析方法研究引线键合过程中的复杂振动提供了深入分析的科学手段。
Surrogate-data method of phase-randomized based on correlation dimension was proposed to surrogate the test data of the amplitude of a transformer terminal in the axial direction tested with different pressures, and then the nonlinear dynamic theory was adopted to check whether the data were nonlinear. The results indicated that there are nonlinear factors in the axial vibration amplitude of the transformer terminal, after calculating the correlation dimension of the test data, when an ultrasonic wire bonding system was loaded with different pressures. They provided an analytic means for further study on vibration in an ultrasonic wire bonding system.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第4期132-136,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(50575230
50675227)
973项目(2003CB716202)
湖南省自然科学基金面上项目(07JJ3091)
关键词
超声引线键合
相位随机化
关联维数
替代数据
ultrasonic wire bonding
phase-randomized
correlation dimension
surrogate data