密封电磁继电器电枢系统随机振动特性分析方法

Zhai Guofu, C. Yinghua, Ren Wanbin
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引用次数: 0

摘要

含电枢系统的密闭式电磁继电器的振动性能是判断设备可靠性的一个重要因素。建立了考虑接触损耗的非线性单自由度数学模型,采用Fokker-Planck方程和蒙特卡罗模拟方法研究了外部高斯白噪声激励下电枢的动态特性。接触力的谱值和统计结果与实际情况吻合较好。从统计结果和谱图上讨论了失触概率、模型参数和系统行为之间的关系,所得结论对密闭式电磁继电器的可靠性设计具有重要意义。
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Analyzing Method of Random Vibration Characteristic for Armature System of Hermetically Sealed Electromagnetic Relay
The vibration performance of hermetically sealed electromagnetic relay which contains armature system is an important element when we judge the reliability of apparatus. A nonlinear single-degree-of-freedom mathematic model considering contact loss was built in this paper, and the dynamic behavior of armature subjected to external Gaussian white noise excitation was investigated by using Fokker-Planck equation and Monte Carlo simulation. Both the spectral contents and statistical results of the contact force showed great coincidence with reality. From the statistical results and spectral diagrams, the relation between the probability of loss contact, model parameters and system behavior was discussed, and the conclusions are of great importance for the reliability design of hermetically sealed electromagnetic relay.
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