MATLAB Program for finding Error Coefficients

Q. The open-loop transfer function of a unity feedback control system is given by

Find error coefficients (a). Kp  (b). Kv  (c). Ka

Program

% program for calculation of error coefficients
% provided by electricalvoice.com
clc
clear all
numg=10
deng=[1 6 10]
%step input
%calculation of error coefficient kp
G=tf(numg, deng)
kp=dcgain(G)
Ess=1/(1+kp)
%ramp input
%calculation of error coefficient kv
numsg=conv([1 0], numg)
densg=[1 6 10]
sG=tf(numsg, densg)
kv=dcgain(sG)
ess=1/kv
%parabolic input
%calculation of error coefficient ka
nums2g=conv([1 0 0], numg)
dens2g=[1 6 10]
s2G=tf(nums2g, dens2g)
ka=dcgain(s2G)
ess=1/ka
pause

 

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