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Draw tangent line in step response ?

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Nguyen Trong Nhan
Nguyen Trong Nhan 2015-11-17
回答： rupesh singh 2018-8-19
Hi all. I'm designing the PID controller. When I have drawn my step response function. I need to draw a tangent line at the maximum slope point of step response to find T1, T2 for designing PID controller(like the picture). Could you help me to do this ? This is my code and step response result.
if true
clc
num = [0.25 0.10875];
den = [1 2.496 1.7992 0.325383 0.021463];
plant = tf(num,den);
step(plant)
end
clc
num = [0.25 0.10875];
den = [1 2.496 1.7992 0.325383 0.021463];
plant = tf(num,den);
step(plant)

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回答（1 个）

rupesh singh
rupesh singh 2018-8-19
why u all r doing bullshit provide correct code

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