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【单选题】
对于负反馈控制系统,前向通路传递函数是G(s),反馈回路传递函数是H(s),若以输入R(s)比较端的输出信号为误差信号E(s),则该闭环控制系统的误差传递函数为A.
1/[1-G(s)H(s)]
B.
G(s)/[1-G(s)H(s)]
C.
G(s)/[1+G(s)H(s)]
D.
1/[1+G(s)H(s)]
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