根据瞬时运动中心的概念，提出一种全新的动平衡测量虚拟振动系统。

Based on the conception of instantaneous motion center, a new virtual vibration system for dynamic balancing measurement is proposed.

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采用子空间模态分析法建立了适合一致地震激励下桥梁振动控制分析的瞬时最优控制算法。

The Instantaneous Optimal Control(IOC) algorithm suitability for the vibration control analysis of bridges under uniform earthquake excitation is proposed based on the subspace mode analysis method.

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本文研究了非平稳随机振动信号的瞬时功率谱。

The instantaneous power spectrum of nonstationary random vibration signals is discussed in this paper.

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