When the passive frequency stabilization we use, such as constant temperature, quakeproof, airproof and sound insulation, can not satisfy the demand of the system, the active frequency stabilization is required.
若采用恒温、防震、密封隔声等被动稳频措施,频率稳定性还不能满足系统要求,就需要主动稳频。
参考来源 - 单纵模激光器主动稳频控制系统研究·2,447,543篇论文数据，部分数据来源于NoteExpress
System frequency of substation is dependant on active load of power grid. when system frequency exceeds allowable limits load shall be regulated immediately for stabilization of system frequency.
变电站的系统频率由电力网的有功负荷来决定，当系统频率超出允许范围时，应及时调整所带负荷以稳定系统频率。
Active stabilization techniques use the technology of the gyroscopes in order to realize close loop control, which are used to eliminate low frequency motions and vibration.
主动稳定系统主要是应用陀螺技术进行闭环稳定控制，用于消除低频运动和振动的影响。
Experimental results for many video sequences show that the method can eliminate high frequency tremble, remain active motion of camera and realize real time image stabilization satisfactorily.
实验结果说明该方法可以较好地去除高频抖动，保留摄像机的主动运动，实现实时稳像。
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