一、问题的提出利用频率特性可以分析系统的品质以及对线性系统进行动态综合,但是有些系统闭环频率特性的测试很不方便,即使可以测几组数据,也并非是系统闭环特性的全貌。如飞行器上的角位置跟踪系统,普通跟踪雷达的角位置跟踪系统等等,系统的原理方框图如下: First, the issue put forward The use of frequency characteristics can analyze the quality of the system and dynamic linear system synthesis, but some systems closed-loop frequency characteristics of the test is not convenient, even if the test can be a few sets of data, it is not the whole picture of the system closed-loop characteristics. Such as the angular position tracking system on an aircraft, the angular position tracking system of an ordinary tracking radar, etc. The principle block diagram of the system is as follows: