开环系统频率特性 ,当 =1rad/s 时 ,其频率特性相角 ( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/e7cfea65119246b6b9ff7aeed1d9719c.png
举一反三
- 开环系统频率特性 ,当 =1rad/s 时 ,其频率特性相角 ()。http:/...b9ff7aeed1d9719c.png
- 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" />
- 设开环系统频率特性G(jω)=,则其频率特性相位移(ω)=180°时对应频率ω为()。 A: 1(rad/s) B: (rad/s) C: 3(rad/s) D: 10(rad/s)
- 设开环系统频率特性G(jω)=,当ω=1rad/s时,其频率特性幅值A(1)=( )。 d42fdac799470cda8302d3b087da3597.gif
- 设开环系统的频率特性G(jω)=,当ω=1rad/s时,其频率特性幅值G(1)=()。 A: 1 B: C: D: