Method The natural frequencies of the hypergravitation training facility were modified by using sensitivity analysis method.

方法采用灵敏度分析法对超重训练设备的固有频率进行修改设计。

Based on the correlation principle, an algorithm to decomposite the damped free vibration signals of a two degrees of freedom system with close natural frequencies is put forward.

摘要基于单一频率成分的自由衰减振动响应信号的相关性原理，提出了一种频率密集成分的两耦合振子自由衰减振动响应信号的解耦算法。