Saturation function in Simulink
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Hi, I would like to implement following block in simulink. How do I do it in Simulink: U = u_d - K/b * sat(σ /θ)
where: sat(σ/θ) = {1 if σ>θ, σ/θ if −θ ≤ σ ≤ θ, −1, σ < −θ}
u_d is input, K and b are constant. If possible even a matlab function would be appritiated.
回答（2 个）
Sruthi Geetha
2017-7-17
In Simulink, you can implement this using If block and If action subsystem block. In the If block you can specify the number of inputs, If, elseif and else conditions. Connect three If action subsystems to each condition and generate the outputs as 1, sigma/theta and -1 for each of the conditions. You can also do this using a simple code in MATLAB Fcn block:
if sigma>theta
out = 1;
elseif (sigma>=-theta)&&(sigma<=theta)
out = sigma/theta;
else
out = -1;
end
3 个评论
Peppe
2017-8-1
Leigh Boyd
2017-8-11
did you ever get an answer to this? I have a similar problrm
Peppe
2017-8-27
Endrias
2019-1-21
0 个投票
Simulink have a nice IF expression block which you can program the sat(.) function without any matlab written code. If anybody interested to see the block code, let me know.
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