Analysis of harmonic response found out the peak frequency of the joint possible to resonate and the stress and strain under peak frequency.

谐响应分析主要是研究联轴器的幅频响应特性，分析其可能的共振峰值频率以及峰值频率下的应力应变情况。

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Frequency capacitive dividers are used to measure the output power frequency test equipment peak, RMS, Harmonic, also doubles as a coupling capacitor.

工频试验变压器主要用于测量工频试验设备的输出峰值、有效值、谐波，亦可兼作耦合电容器。

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And then, we mainly discuss the peak current controlling mode and the sub-harmonic oscillation when the duty cycle exceeds 50%.

同时，着重分析了峰值电流控制模式下，由于电流扰动和占空比扰动导致系统在占空比大于50%情况下而出现次谐波振荡原因。

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