摘要
针对大型旋转机械动平衡,利用离散傅里叶变换和正交相关法,提出了提取振动信号特征量的数据处理算法,可以从通频振动信号中提取出基频信号的幅值和相位;利用数值计算的算法,实现通频信号真有效值的测量;开发了以数字信号处理器(DSP)为核心的八通道数据采集电路,并利用复杂可编程逻辑器件(CPLD)和锁相倍频技术,设计了准确的数据采集触发逻辑电路。实验表明,所提出的算法简捷,易于实现,所设计的测试系统可实现不平衡量的精确测量和准确定位,检验了算法的有效性。
A concise algorithm for dynamic balance test of large rotary machines is presented in the paper from the aspects of both DFT （ discrete Fourier transform） and digital cross correlation. The amplitude and phase of the fundamental frequency component in the vibration signal of large rotary machines can be obtained by this algorithm. To measure the RMS, a numerical computation method is adopted. On these bases, a hardware circuit based on DSP is developed, and an accurate triggering logic unit for data acquisition is p with CPLD and phase lock loop. This test system, can perform precise measuring and locating of unbalanced weight.
出处
《电机与控制学报》
EI
CSCD
北大核心
2006年第3期321-323,328,共4页
Electric Machines and Control
基金
黑龙江省研究生创新科研项(YJSCX2005-244HLJ)
