单位反馈系统的开环传递函数为G(S)=K(2s+1)/(s+1)平方(4/7 s-1)绘制根轨迹,确定K的范围.系统的开环极点怎么细求(s+1)平方极点也是-1?
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![单位反馈系统的开环传递函数为G(S)=K(2s+1)/(s+1)平方(4/7 s-1)绘制根轨迹,确定K的范围.系统的开环极点怎么细求(s+1)平方极点也是-1?](/uploads/image/z/1551187-19-7.jpg?t=%E5%8D%95%E4%BD%8D%E5%8F%8D%E9%A6%88%E7%B3%BB%E7%BB%9F%E7%9A%84%E5%BC%80%E7%8E%AF%E4%BC%A0%E9%80%92%E5%87%BD%E6%95%B0%E4%B8%BAG%28S%29%3DK%282s%2B1%EF%BC%89%2F%28s%2B1%29%E5%B9%B3%E6%96%B9%EF%BC%884%2F7+s-1%EF%BC%89%E7%BB%98%E5%88%B6%E6%A0%B9%E8%BD%A8%E8%BF%B9%2C%E7%A1%AE%E5%AE%9AK%E7%9A%84%E8%8C%83%E5%9B%B4.%E7%B3%BB%E7%BB%9F%E7%9A%84%E5%BC%80%E7%8E%AF%E6%9E%81%E7%82%B9%E6%80%8E%E4%B9%88%E7%BB%86%E6%B1%82%28s%2B1%29%E5%B9%B3%E6%96%B9%E6%9E%81%E7%82%B9%E4%B9%9F%E6%98%AF-1%3F)
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