steady state error command
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Is there a command that will give the steady state error of the the response of a transfer function
回答（2 个）
Paulo Silva
2011-3-30
SP=5; %input value, if you put 1 then is the same as step(sys)
[y,t]=step(SP*sys); %get the response of the system to a step with amplitude SP
sserror=abs(SP-y(end)) %get the steady state error
7 个评论
Naufal Indrastoto
2020-5-31
I have already tried this and it says undefined function or variable 'sys'. Could please you explain more about it?
Eric Chua
2020-5-31
sys is your transfer function
HanJie Chong
2020-6-10
编辑：HanJie Chong
2020-6-10
The result of this code is already in %?
EXP: 0.4= 40% or 0.4%
Walter Roberson
2020-6-10
No, sserror would be absolute value, not relative value. You would have to divide by SP to get relative value as a fraction, which you could then multiply by 100 to get percentage.
Mohammad Hosein Forghani
2020-6-27
Thanks, it worked for me
irshad maz
2021-1-14
what is SP stand for Sir
JAMES KEEN
2021-2-24
@irshad maz I believe it means setpoint i.e. the point of which you want the system response to settles at.
Mohammad Hosein Forghani
2020-6-27
0 个投票
Another approach theoretically would be final value theorem, I might also implement that in MATLAB.
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2021-2-24
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