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H v tn :Nguyn Di Hoi

Mssv : 081411D

Lp : 08DD2D

BO CO TH NGHIM

BI 4: NG DNG SIMULINK IU KHIN NG C

2.1 Kho st h vng kn, nhn dng h thng theo m hnh ZieglerNichols.

Bc 1: Dng simulink xy dng m hnh iu khin vng kn vtr ng c nh sau:

Trong : Step: l tn hiu hm nc n v. Transfer FcnTransfer Fcn1Transfer Fcn2: m hnh ng c tuyn

tnh ha.

Ng ra ca Transfer Fcn2 l vtr a vo Scope quan st.Bc 2:iu chnh cc gi tr hm nc nh sau:

Step time = 0 Initiall calue = 0 Final value = 1 Chnh Stop time = 50s

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Bc 3: Nhp chut vo Parameters, vo trang Data History b Limit data points tolast.

Bc 4:Thay i h s Gain trong khi Gain. Lp i lp li cho n khi p ng cdao ng u khng tt dn ( bin gii n nh ).

Gain = 66,8

Bc 5: Nhn Run m phng qu trnh. Double click vo khi Scope, ta c nhsau:

Kgh = 66.8 v Tgh = 0.8

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2.2 Kho st m hnh iu khin ng c PID ( phng php Ziegler Nichols ).

Bc 1: Dng Simulink xy dng m hnh vng kn iu khin vtr ng c DC:

Bc 2:Xc nh thng s ZeiglerNichol

Kp = 40 Ti = 0.4 Td = 0.1 Kd = 4 Ki = 100

Bc 3: Nhp cc thng s PID, khi Repeating Sequence c cc thng s:

Time values: [ 0 2.5 5 7.5 10] Output values: [ 0 5 0 -5 0 ]

Bc 4: Nhn Run m phng qu trnh ta c nh sau:

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