大学物理 ›› 2015, Vol. 34 ›› Issue (3): 46-46.
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吴静[1] 姚宇峰[2] 常晓雅[1] 王鑫磊[1]
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摘要： 实验通过电磁激振方式驱动弹性摆作受迫振动,并巧妙利用RLC谐振电路中电容值在适当频率范围内的微小变化会导致电阻R上产生较大压降变化这一现象,把弹性摆与电容特性联系起来,间接得到电压变化与弹性摆运动变化的关系,进而实现通过改变激振频率来研究摆受迫振动的幅频特性与相频特性的研究目的.
关键词: 受迫振动, 非接触弹性摆, 电磁激振, RLC谐振电路
Abstract: The experiment driving the elastic swing to forced vibration by the electromagnetic vibration,and manipulating the phenomenon that small changes in capacitance value can produce a greater voltage drop on resistance in the RLC resonant circuit value（ small changes in the appropriate frequency range）,linking the elastic swing with the capacitance characteristics.Then we can get the relationship between the voltage changes and the change of elastic pendulum movement indirectly,and change the excitation frequency to study the amplitude frequency characteristic and phase frequency characteristic of the forced vibration.
Key words: forced non-contact elastic pendulum, electromagnetic vibration, RLC resonant circuit
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吴静[] 姚宇峰[] 常晓雅[] 王鑫磊[]. 基于RLC谐振电路研究非接触弹性摆受迫振动的运动特性[J]. 大学物理, 2015, 34(3): 46-46.
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