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Random, quasi-periodic and chaotic vibrations of farm tractors

机译:随机,准周期性和农用拖拉机的混沌振动

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摘要

The nonlinear dynamics of a larger size tractor was investigated experimentally using a frequency response test over a wide range of forward speed chosen as the controlled parameter. The analysis was carried out in the time domain and the qualitative changes of the dynamics of the tractor were analyzed using the phase portrait and Poincare' section that identified the quasi-periodic vibrations in the middle speed range of 1.51~3.08 m/s. Quantitative analysis using the correlation dimension analysis identified the random vibration in the low speed range of 0.63~1.42 m/s and deterministic chaotic vibration with the largest Lyapunov exponents occurred in the high-speed range of 3.32~4.50 m/s.
机译:通过根据受控参数选择的频率响应试验实验研究了较大尺寸拖拉机的非线性动力学。 在时域中进行分析,使用相位肖像和庞的振动分析拖拉机动态的定性变化,该部分确定了中间速度范围为1.51〜3.08 m / s的准周期性振动。 使用相关尺寸分析的定量分析鉴定了0.63〜1.42米/秒的低速范围内的随机振动,并在高速范围为3.32〜4.50 m / s的情况下发生了最大的Lyapunov指数的确定性混沌振动。

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