why am I getting the following error?

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Francesca Nanni
Francesca Nanni 2020-5-8
回答： Abdo Zayet 2022-5-22
s = tf('s')
'tf' requires one of the following:
Control System Toolbox
DSP System Toolbox
Model Predictive Control Toolbox
Signal Processing Toolbox

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回答（1 个）

Abdo Zayet
Abdo Zayet 2022-5-22
clear all; %% FIRST TRANSFER FUNCTION G1: A1=[1 3 2 5]; B1=[0 1]; C1=[1 2]; G1=tf('num1','den1'); %%SECOND TRANSFER FUNCTION G2: A2=[-4 0 0 3]; B2=[1 0]; C2=[3 0]; G2=tf('num2','den2'); %%THIRD TRANSFER FUNCTION H: A3=[3 2 1 0]; B3=[1 1]; C3=[1 1]; H=tf('num3','den3'); %%GENERAL TRANSFER FUNCTION G: G1H=feedback(G1,H); G=series(G1H,G2)

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