适当选择附加力或控制力以减少稳态振动一直是近期论文的主题。这类控制力与原激励力的频率和相位相同。本文用正则模态法决定控制力幅值,概念上比早期方法更简单。它表明、用单个控制力能明显减少多自由度系统的共振响应,特别能减少中小阻尼系统的基频共振。 Proper selection of additional force or control to reduce steady-state vibrations has been the subject of recent papers. This kind of control force and the original excitation frequency and phase are the same. In this paper, we use the canonical mode method to determine the amplitude of the control force, which is simpler in concept than the earlier one. It shows that with a single control force can significantly reduce the resonant response of multi-degree of freedom system, in particular, can reduce the fundamental resonance of small and medium damping system.