磁盤驅(qū)動(dòng)讀取系統(tǒng)的分析設(shè)計(jì)

1、百度文庫磁盤驅(qū)動(dòng)讀取系統(tǒng)的分析設(shè)計(jì)一、閉環(huán)系統(tǒng)的性能分析(1)確定使閉環(huán)系統(tǒng)穩(wěn)定的Ka的取值范圍>>G1=tf(5000,1,1000);>>G2=tf(1,conv(1,0,1,20);> >G=series(G1,G2)Transferfunction:5000sA3+1020sA2+20000s開環(huán)傳函閉環(huán)傳函50000Kg3=-2s31020s220000s50000KG3=-2s31020s220000s50000K> >symsKden> >den=11020200005000*K;> >K=den(2)*de

2、n(3)/den巧000K=4080Ka值，仿真閉環(huán)系統(tǒng)的階躍響應(yīng)，并進(jìn)行分有勞斯判據(jù)可得k的范圍是0<K<4080(2)在上述取值范圍內(nèi)取較小和較大的兩個(gè)析10K=100時(shí)> >g=100*Gg1=feedback(g,1)C=dcgain(g1)Transferfunction:500000sA3+1020sA2+20000sTransferfunction:500000sA3+1020sA2+20000s+5000001c,t=step(g1);>>y,k=max(c);>>percentovershoot=100*(y-C)/Cperce

3、ntovershoot=>>t=setllingtime(g1)t=K=1000時(shí)>>g=1000*GTransferfunction:5e006sA3+1020sA2+20000s>>g2=feedback(g,1)Transferfunction:5e006sA3+1020sA2+20000s+5e006>>c,t=step(g2);>>C=dcgain(g2)C=>>y,止maxy=調(diào)節(jié)時(shí)間函數(shù)11>>percentovershoot=100*(y-C)/Cpercentovershoot=t=setll

4、ingtime(g2)t=c(tn)c()超調(diào)量100%21.6918%c()調(diào)節(jié)時(shí)間ts00.10,20.3040.50.60.70.S"09Timeoffset0K=1000時(shí)超調(diào)量%c(tp)c()100%71.0891%c()調(diào)節(jié)時(shí)間ts(s)(3)考察擾動(dòng)信號(hào)為單位階躍時(shí)，上述兩個(gè)Ka取值情況下，系統(tǒng)的抗干擾能力，并進(jìn)行分析>>g2=tf(1,conv(10,120)Transferfunction:1sA2+20s>>g1=tf(5000,11000)Transferfunction:5000s+1000>>symsk>>g

5、3=feedback(g2,g1,1)Transferfunction:s+1000sA3+1020sA2+20000s-5000>>g3=feedback(g2,-g1,1)Transferfunction:s+1000sA3+1020sA2+20000s+5000>>g4=-g3Transferfunction:-s-1000sA3+1020sA2+20000s+5000Dss1000-32/Yss1020s20000s5000Ka當(dāng)K=100時(shí)/>>g=tf(-1-1000,1102020000500000)Transferfunction:-s-10

6、00sA3+1020sA2+20000s+500000>>c,t=step(g);>>y,k=min(c)y=k=15擾動(dòng)輸入的傳遞函數(shù)c(t)=*10-3(s)當(dāng)K=1000時(shí)>>g=tf(-1-1000,11020200005000000)Transferfunction:-s-1000sA3+1020sA2+20000s+5e006>>c,t=step(g);>>y,k=min(c)y=k=11c(t)=*10-3(s)Q0.10.2Q30.40.50.80i7DJ0.91Timeoffset0(4)針對(duì)如下的性能指標(biāo)要求，折中

7、選取一個(gè)合適的Ka值性能揖標(biāo)調(diào)節(jié)時(shí)間預(yù)期值小于5%小于230ms對(duì)單位階躍干擾的最大響應(yīng)值小于5又1。7取Ka=100、速度反饋系統(tǒng)的性能分析大一RQ)-三二J3聞-平J建(1)運(yùn)用第3章中所學(xué)的勞斯判據(jù)，確定要使閉環(huán)系統(tǒng)穩(wěn)定,Ka和K1應(yīng)如何選取?YK1=針對(duì)你選取的Ka和K1,仿真閉環(huán)系統(tǒng)的階躍響應(yīng)，并計(jì)算超調(diào)量、調(diào)節(jié)時(shí)間和Ka=100,(2)對(duì)單位階躍擾動(dòng)的最大響應(yīng)值。>>g1=tf(5000,11000)Transferfunction:5000s+1000>>g2巾1,120)Transferfunction:s+20百度文庫3812Transferfunct

8、ion:1s+20Transferfunction:500000>>>>C=1y=k=0.2卜02030.8Imeolfset;0c,t=step(g0);C=dcgain(g0)>>g3=tf(1,120)>>y,止max(c)0L0>>t=setllingtime(g0)t=>>g0=feedback(g3*feedback(100*g1*g2,-1),1)sA3+1020sA2+35000s+5000001I-百度文庫17超調(diào)量9調(diào)節(jié)時(shí)間ts%C(tp)C()100%2.0650%c()/，/>>perc

9、entovershoot=100*(y-C)/Cpercentovershoot=>>g10=-feedback(g2*g3,-g1*100*1/g3+1),1)Transferfunction:-s-1000sA3+1020sA2+35000s+500000>>step(g10)>>c,t=step(g10);>>y,k=max(c)y=0k=1>>y,k=min(c)y=k=38對(duì)單位階躍擾動(dòng)的最大響應(yīng)值：c(t)=*10-3擾動(dòng)輸入傳遞函數(shù)/(s)。三、PD控制器的性能分析一一根軌跡法干擾K3值>>G3=series(G,tf(11,1)Transferfunction:5000s+5000sA3+1020sA2+20000s>>rlocus(G3)ftXYteunm