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Floquet's theorem and matrices for parametric oscillators: Theory and demonstrations

机译:参数振荡器的Floquet定理和矩阵:理论和论证

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摘要

The restoring force (kx) df a parametric oscillator is proportional to the displacement (x) but the proportionality factor (k) varies periodically with time (t). This fact gives rise to novel dynamic behavior that can be described with elementary mathematics without knowing the specific dependence of k on t. In addition to gathering together previously available results we also treat special cases, including the effects of degeneracy and damping. A particularly simple practical oscillator (the "yendulum") is described which makes use of five yen Japanese coins for demonstrating the results presented in the theory of the oscillator. (C) 1999 American Association of Physics Teachers. [References: 15]
机译:参数振荡器的恢复力(kx)与位移(x)成比例,但比例因子(k)随时间(t)周期性变化。这一事实引起了新颖的动力学行为,可以用基本数学来描述它,而不必知道k对t的特定依赖性。除了收集以前可获得的结果外,我们还处理特殊情况,包括退化和阻尼的影响。描述了一种特别简单的实用振荡器(“日圆”),其使用五日元的日本硬币来证明振荡器理论中呈现的结果。 (C)1999年美国物理教师协会。 [参考:15]

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