频率可调惯性作动器的设计与实验研究

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摘要提出用电感-负电阻分流电路来调节惯性作动器的固有频率，使惯性作动器可作为频率可调动力吸振器使用。首先分析了电感-负电阻电磁分流阻尼的理论模型，随后通过理论和实验分析了惯性作动器固有频率与分流电路参数的关系。最后以悬臂梁为控制对象，对所设计的可调惯性作动器控制效果进行实验研究。实验结果表明：在保证分流电路系统稳定的前提下，惯性作动器的固有频率随着电感值的降低而增加，惯性作动器的固有频率可以从原来的46.25Hz调节至111.3Hz。当惯性作动器固有频率与悬臂梁的固有频率相吻合时，在该固有频率附近悬臂梁的振动幅值降低90%。由此验证了所提出的通过电磁分流电路可以调节惯性作动器固有频率，在不改变惯性作动器物理结构的基础上，使其固有频率能跟踪受控结构的外干扰力频率，就可以充分发挥惯性作动器的吸振能力，最大限度地抑制结构振动。

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	何帆
	毛崎波
	赖龙程
	赵迪
	吴志杰

关键词 ：固有频率调节, 电磁阻尼, 电感-负电阻电磁分流电路

Abstract：The natural frequency of the inertia actuator tuned by the inductor-negative resistance shunt circuit is presented. The tunable inertia actuator can be used as a tunable dynamic vibration absorber. Firstly, the theoretical model of tunable inertia actuator with inductor-negative resistance circuit was analyzed. Secondly, the relationship between the natural frequency of inertial actuator and the parameters of shunt circuit was analyzed theoretically and experimentally. Finally, with an example of a cantilever beam, the control performance of the designed tunable inertia actuator is experimentally verified. The experimental results show that on the premise of ensuring the stability of the shunt circuit system, the natural frequency of the inertial actuator increases with the decrease of the inductance. The natural frequency of inertial actuator can be tuned from the original 46.25Hz to 111.3Hz. When the natural frequency of the inertial actuator is tuned to the natural frequency of the cantilever beam, the vibration amplitude of the cantilever beam around targeted frequency is reduced by 90%. The results show that the natural frequency of the inertial actuator can be tuned by the electromagnetic shunt circuit. On the basis of not changing the physical structure of the inertial actuator, the natural frequency of the inertial actuator can track the external interference force frequency of the controlled structure, which can give full play to the vibration absorption capacity of the inertial actuator and restrain the structural vibration to the maximum extent.

Key words： tune the natural frequency electromagnetic damping inductance-negative resistance electromagnetic shunt circuit

收稿日期: 2022-04-21 出版日期: 2023-04-15

引用本文:

何帆，毛崎波，赖龙程，赵迪，吴志杰. 频率可调惯性作动器的设计与实验研究[J]. 振动与冲击, 2023, 42(7): 33-37.
HE Fan, MAO Qibo, LAI Longcheng, ZHAO Di, WU Zhijie. Design and tests of frequency adjustable inertial actuator. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(7): 33-37.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I7/33

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