主动减振是指用控制系统抑制机械振动。它的悠久历史可以追溯到用离心摆调节蒸汽机的转速,至于应用伺服系统抑制结构振动,则是一项新兴技术。这是由于被动减振技术抑制超低频振动和宽频带随机振动的效果较差,往往不能满足工程界提出的技术要求。另一方面,最近三四十年内自动控制技术有飞跃发展,为主动减振技术的兴起创造了必要条件。因为它的实用价值很 Active vibration control means to suppress mechanical vibration. Its long history can be traced back to the use of centrifugal pendulum to regulate the speed of the steam engine, and the application of servo system to suppress structural vibration is an emerging technology. This is due to the passive damping technology to suppress ultra-low frequency vibration and wide band random vibration less effective, often can not meet the engineering requirements of the proposed technology. On the other hand, in the recent three or four decades, automatic control technology has made rapid progress, creating the necessary conditions for the active vibration reduction technology. Because of its practical value