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针对录象机的伺服驱动系统及其ＩＣ的设计和测试问题，提出了一套基于Ｗｉｎｎｅｒ－Ｈｏｐ方程对录象机伺服控制系统进行频域在线辨识的方法。从理论上推导了伺服回路各典型元件的辨识模型，归纳和分析了伺服控制系统在不同状态下的构成，实测了磁鼓及主导轴伺服环路在ＰＡＬ和ＮＴＳＣ制式下不同状态的开环、闭环特性，采用在线频域响应法估计出磁鼓和主导轴伺服控制回路的增益及滤波器带宽参数。所得实验数据为中国设计和开发录象机提供了依据。
Aiming at the design and testing of servo drive system of video camera and its IC, a method based on Winner-Hop equation for online identification of video servo system is presented. The identification model of each typical component of servo loop is deduced theoretically. The servo control system is summarized and analyzed under different states. The open-loop of drum and capstan servo loop in different states under PAL and NTSC is measured. Closed-loop characteristics, the online frequency domain response method to estimate the drum and capstan servo control loop gain and filter bandwidth parameters. The experimental data provided the basis for the design and development of video recorders in China.