steady state error command
显示 更早的评论
Is there a command that will give the steady state error of the the response of a transfer function
回答（3 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.
Anish Mitra
about 19 hours 前
0 个投票
Assuming your system is stable, you can use the dcgain command to compute the low frequency gain for an LTI system. Based on final value theorem (as mentioned above) this is the steady-state value of the step response.
类别
在 帮助中心 和 File Exchange 中查找有关 Linear Model Identification 的更多信息
2026-6-1，13:51
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
