典型系統(tǒng)動態(tài)性能和穩(wěn)定性分析的電路模擬

1、典型系統(tǒng)動態(tài)性能和穩(wěn)定性分析的電路模擬一、實驗?zāi)康?、 學(xué)習(xí)和掌握動態(tài)性能指標(biāo)的測試方法。2、 研究典型系統(tǒng)參數(shù)對系統(tǒng)動態(tài)性能和穩(wěn)定性的影響。二、實驗內(nèi)容觀測二階系統(tǒng)的階躍響應(yīng)，測出其超調(diào)量和調(diào)節(jié)時間，并研究其參數(shù)變化對動態(tài)性能和穩(wěn)定性的影響。三、實驗步驟1、熟悉實驗設(shè)備，設(shè)計并連接一個積分環(huán)節(jié)和一個慣性環(huán)節(jié)組成的二階閉環(huán)系統(tǒng)的模擬電路；2、利用實驗設(shè)備觀測二階系統(tǒng)模擬電路的階躍特性，并測出其超調(diào)量和調(diào)節(jié)時間；3、改變該二階系統(tǒng)模擬電路的參數(shù)，觀測參數(shù)對系統(tǒng)動態(tài)性能的影響，并記錄不同參數(shù)下的系統(tǒng)輸出曲線。1.開環(huán)傳遞函數(shù)為den=1,2,3,2;roots(den)%開換極點G=tf(3,1,

2、2,3,2);Gm,Pm,Wcg,Wcp=margin(G)nyquist(G)bode(G)grid onden=1,2,3,2;roots(den)%開換極點ans = -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2);Gm,Pm,Wcg,Wcp=margin(G)Gm = 1.3338Pm = 17.1340Wcg = 1.7323Wcp =1.5599G=tf(6,1,2,3,2);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.&

3、gt; In lti.margin at 89Gm = 0.6669Pm = -16.6613Wcg = 1.7323Wcp = 1.96822.將系統(tǒng)的開環(huán)傳函改為den=1,2,3,2,0;roots(den)%開換極點ans = 0 -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.> In lti.margin at 89Gm = 0.6667Pm = -43.5555Wcg

4、 = 1.0000Wcp = 1.3325將系統(tǒng)的開環(huán)傳函改為G=tf(6,1,2,3,2,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.> In lti.margin at 89Gm = 0.3333Pm = -84.3432Wcg = 1.0000Wcp = 1.6697>>>> 3.den=1,2,3,2,0,0;roots(den)%開換極點ans = 0 0 -0.5000 + 1.3229i -0.5000 - 1.3229i -1.0000 G=tf(3,1,2,3,2,0,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.> In lti.margin at 89Gm = InfPm = -115.6441Wcg = NaNWcp =G=tf(6,1,2,3,2,0,0);Gm,Pm,Wcg,Wcp=margin(G)Warning: The closed-loop system is unstable.> In