1) half-power method
半功率法
1.
The former eight resonance damping ratios were tested with DEUI as well as with half-power method and modal analysis method,while the correlations of their experimental results were analyzed.
利用分布激励突卸法进行了转子叶片的前8阶阻尼比测试,对同样的转子叶片进行半功率法和模态分析法阻尼比试验,将三者的试验结果进行相关分析。
2) Half Power Point Method
半功率点法
3) half-power bandwidth method
半功率带宽法
1.
The half-power bandwidth method is the commonly used method at home and abroad,the authors discover that factors,such as the sampling frequency,the frequency resolution,the ratio of the sampling frequency to the signal frequency,the analyzed width and the damping ratio,make the estimated damping ratio fluctuate vastly.
半功率带宽法是国内外常用的测试阻尼的方法,笔者发现半功率带宽法由于受到信号处理中的①采样频率SF②频率分辨率△f③采样频率与信号频率之比K④采样分析的长度T和⑤阻尼比D的大小等因素的影响使得测得的阻尼比值波动很大,除少数状态是可信的外,多数状态是不稳定的,有时误差惊人,得到的测试数据不能使用,易导致错误的结论。
4) half-wave power
半波功率
补充资料:点对点法
分子式:
CAS号:
性质:发射光谱分析中,将金属试样制成两个锥体状电极,分别作为光源的上下电极,彼此相对以电弧或火花法进行激发摄谱。该法因无辅助电极,所摄光谱中可无其伴存谱线。
CAS号:
性质:发射光谱分析中,将金属试样制成两个锥体状电极,分别作为光源的上下电极,彼此相对以电弧或火花法进行激发摄谱。该法因无辅助电极,所摄光谱中可无其伴存谱线。
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