<p>某控制系统的结构如题-图所示，己知:<img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/f9/c9/f9c988761f446e1e2c7eebedf2db65a6.jpg" style="width: 100%;height: auto;"><img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/e8/85