This paper briefly introduces the structure and principle of a new system of self-excited oscillations, which is a magnetic pendulum with swing-controlled switch.
本文将对一种新的自激振动系统，即带有摆控开关的磁力摆的结构、原理及实验结果作一扼要的介绍和讨论。
Based on the theory of horizontal pendulum, the theoretical function model of magnetic error of self adjusting level is deriveted, and observation equation in geomagnetic field is set up.
利用物理摆原理导出了自动安平水准仪磁致误差的理论函数模型，建立了地磁场中的观测方程。
Based on the theory of horizontal pendulum, the theoretical function model of magnetic error of self adjusting level is deriveted, and observation equation in geomagnetic field is set up.
利用物理摆原理导出了自动安平水准仪磁致误差的理论函数模型，建立了地磁场中的观测方程。
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