classical swing equation 经典摇摆方程
The swing equation of gyro theodolite is nonlinearity, and data processing result is not good after linearizing.
陀螺的摆动方程是非线性的，线性化后的数据处理结果都不理想。
The approximate solution to the nonlinear differential dynamic equation of a swing is derived by using another simple method, which is very suitable for discussing in class.
用另一种方法导出了秋千非线性动力学微分方程的近似解，很适合课堂讨论。
Starting with the friction underwent, we discuss the regularity of the variety of the max swing angle, the simple way to work out the friction doing work and the equation of motion etc.
从分析其受的摩擦力出发，讨论了最大摆角变化的规律；计算摩擦力作功的简便方法；运动方程及振动经历的时间问题。
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