c3.pps
TRANSCRIPT
-
Ging vin: Nguyn c HongB mn iu Khin T ngKhoa in in Ti Hc Bch Khoa Tp.HCMEmail: [email protected]
MN HC
-
C TNH NG HCCHNG 3
-
Ni dung chng 33.1 Khi nim3.2 c tnh thi gian3.3 c tnh tn s3.4 c tnh ng hc ca cc khu in hnh 3.5 c tnh ng hc ca h thng t ng3.6 Kho st c tnh ng hc dng MatLab
-
Khi nimc tnh ng ca h thng m t s thay i ca tn hiu u ra theo thi gian khi c tc ng u vo.Tn hiu vo: hm xung n vhm nc n vhm iu haC 2 loi:c tnh thi gianc tnh tn s
-
c tnh thi gianTn hiu vo: hm xung n v hoc hm nc n vTn hiu vo: hm xung n v g(t): p ng xung hoc hm trng lng
-
c tnh thi gianTn hiu vo: hm nc n v h(t): p ng nc hoc hm qu
-
V d: c tnh thi gianCho h thng:p ng qu p ng xung
-
V d: c tnh thi gianMatlab: G = tf([5],[1 5]); impulse(G); step(G)p ng xung p ng qu
-
c tnh tn sTn hiu vo: hm iu haTn hiu vo: hm sinGi s G(s) c n cc pi phn bit tha: pi j
-
c tnh tn sNu h thng n nh th: Re{pi} < 0Tn hiu ra xc lp l hnh sin cng tn s.
-
c tnh tn sTn hiu ra xc lp l hnh sin cng tn s.
-
c tnh tn snh ngha: c tnh tn s = Tng qut: G(j) l hm phc
-
c tnh tn sC 2 dng th biu din c tnh tn s:Biu BodeBiu NyquistBiu Bode bin : biu din L() theo Vi L() = 20logM() (dB)Biu Bode pha: biu din () theo Cn gi l ng cong Nyquist: biu din G(j) theo trong h ta cc khi = 0 .
-
V d: c tnh tn sCho h thng:Biu Bode:G=tf([1],[1 1 1 0]);bode(G);hocbode(G,{0.01,100});
-
V d: c tnh tn sCho h thng:Biu Nyquist:G=tf([1],[1 1 1 0]);nyquist(G);
-
c tnh ng hc ca cc khu in hnh Khu t l Khu tch phn l tng Khu vi phn l tng Khu qun tnh bc nht Khu sm pha bc nht Khu dao ng bc hai Khu tr
-
Khu t lHm truyn:c tnh tn s : Bin : Pha:
-
Khu t lBiu Bode:
-
Khu tch phn l tngHm truyn:c tnh tn s : Bin : Pha:
-
Khu tch phn l tngBiu Bode:
-
Khu vi phn l tngHm truyn:c tnh tn s : Bin : Pha:
-
Khu vi phn l tngBiu Bode:
-
Khu qun tnh bc nhtHm truyn:c tnh tn s : Bin : Pha:
-
Khu qun tnh bc nhtBiu Bode:
-
Khu sm pha bc nhtHm truyn:c tnh tn s : Bin : Pha:
-
Khu sm pha bc nhtBiu Bode:
-
Khu dao ng bc haiHm truyn:c tnh tn s : Bin : Pha:
-
Khu dao ng bc haiBiu Bode:
-
Khu trHm truyn:c tnh tn s : Bin : Pha:
-
Khu trBiu Bode:
-
c tnh tn s ca h thngXt h thng c hm truyn:c tnh tn s : Bin : Pha:
-
PP v gn ng biu BodeVit hm truyn dng:Cc Gi(s) l cc khu c bn, l s khu tch phn l tng nu < 0, nu > 0 th h thng c khu vi phn l tng.Tm tt c cc tn s gy: Xc nh im A:
-
PP v gn ng biu BodeQua A v ng thng c dc 20 dB/dec, ko di ti tn s gy 1 Ti tn s gy 1, dc c cng thm -20dB/dec nu c 1 khu qun tnh bc nht hoc -40dB/dec nu c 1 khu dao ng bc 2,. ri ko di n tn s gy tip theo.Qu trnh lp li cho n ht cc tn s gy
-
PP v gn ng biu Bodei vi Bode pha, ta lp bng. Tnh cc gc ti mt s tn s ri ni li
123..k()
-
V dV Bode h thng c hm truyn:
-
V d
-
Tiu chun n nh Bode d tr bin v d tr pha:MGMC-
-
Tiu chun n nh BodeXt h thng vng kn sau :H thng vng kn n nh nu h h c d tr bin v d tr pha dng.
-
V biu Bode
-
V biu Bode