회로이론 및 제어공학철도신호기사 · 2019년09월21일 · 31/80
31.그림과 같은 블록선도의 등가 전달함수는?
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정답
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해설
[{R(s) - G3(s)C(s)} x G1(s) + C(s)] x G2(s) = C(s) {G1(s)R(s) - G1(s)G3(s)C(s) + C(s)} x G2(s) = C(s) G1(s)G2(s)R(s) - G1(s)G2(s)G3(s)C(s) + G2(s)C(s) = C(s) G1(s)G2(s)R(s) = G1(s)G2(s)G3(s)C(s) - G2(s)C(s) + C(s) C(s) x {G1(s)G2(s)G3(s) - G2(s) + 1} = G1(s)G2(s)R(s) C(s) / R(s) = G1(s)G2(s) / {1 - G2(s) + G1(s)G2(s)G3(s)}