负反馈系统开环传递函数，K00a0增大时，闭环系统（ 00a000a0）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/963c419a793d4a9faeb1e1633ad9728f.png
举一反三
- 负反馈系统的开环传递函数为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/a7ed7837bacb42a0bc3a3b685f1f59ca.png" />，若要绘制参数<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/20abe260498a4ba4ac78f48ef331ea76.png" />的根轨迹，其等效开环传递函数应该是（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/3fd90fdfd9534f81b6f4b6052f381f27.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/c39a9d3fb81b47bead514a12c4ad843d.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/916d03716ed144c58426442cc710f9fa.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/2f2d63241a46476a9ece1e3ccd8e96e5.png" />
- 控制系统的开环传递函数为 ，系统开环增益K为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/4bfbbf65af5a4b34b230fa8800ff9a23.png
- 系统的闭环传递函数为，则系统的闭环极点为（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/fa44dfbedcc94a06aa36b7b8f0a5dfe4.png
- 负反馈系统的开环传递函数为，若要绘制参数的根轨迹，其等效开环传递函数应该是（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/a7ed7837bacb42a0bc3a3b685f1f59ca.png
- 零初始条件下系统的微分方程如下0.2<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/a9016a8e310743f2bd58d7f9c8d9d679.png" />，则系统的传递函数为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/a4bea77a2206422f94416a8b92b1ae1b.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/8012e0d7f6374e61aeb25b284d85b182.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/9ba5daef946e4f8aa8a46e162da7a01d.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/0282eee3912a4d9586d3d28f4fbfc4b1.png" />