XIAO Ming-wei1, YANG Yong-ming1, ZHONG Yu-lin2, et al. Research on the measurement of low-frequency vibration of water turbine generators[J]. 2011, 30(5): 54-57.
XIAO Ming-wei1, YANG Yong-ming1, ZHONG Yu-lin2, et al. Research on the measurement of low-frequency vibration of water turbine generators[J]. 2011, 30(5): 54-57. DOI: 10.13873/j.1000-97872011.05.014.
The hydropower generating units’ vibration parameter is an important index to monitor its operating stability.To measure the low-frequency vibration of the large and middle scale of hydropower generating units
according to frequency characteristic compensation principle of the vibration sensor
a low-frequency compensating circuit is designed to extend the frequency characteristics to the low frequency region.To make the design of compensating circuit convenient
the equivalent quality factor Q is brought in.The mathematical model of the magnetoelectric vibration sensor and the design of the compensation circuit are described in detail.The amplitude-frequency characteristics of the sensor and its mathematical model are comparatively analyzed before and after compensation respectively.The experimental result shows that the design could extend the amplitude-frequency characteristics to the low frequency region
and have good stability and linearity.
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references
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