为倒立摆建模。通常倒立摆系统建模成一个线形系统，因此模型只对小幅度摆动的摆才有效。
Modeling an inverted pendulum. Generally the inverted pendulum system is modeled as a linear system, and hence the modeling is valid only for small oscillations of the pendulum.
通过测量物体在四簧倒立试验台上的摆动周期和平衡，不仅确定了物体的惯性矩和惯性积，也确定了物体的质心位置。
By measuring the swing cycles and balances of the body on the four spring handstand equipment, we can determine not only the inertial moment and products of the body, but also the center of mass.
通过测量物体在四簧倒立试验台上的摆动周期和平衡，不仅确定了物体的惯性矩和惯性积，也确定了物体的质心位置。
By measuring the swing cycles and balances of the body on the four spring handstand equipment, we can determine not only the inertial moment and products of the body, but also the center of mass.
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