Conflicting Simulink mdoels - transfer function
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Tinotenda Kurimwi
le 28 Mai 2021
Commenté : Tinotenda Kurimwi
le 29 Mai 2021
I have a simulink model where the model on the right which is simplified does not give the same output as the expanded version on the right, I cannot figure out way as the equatiosn are the same, you may check page 5 of 9 of the pdf attached. I have attached the two simulink models as combined_control_model (left hand block diagram) and control_model (the right hand one).
Any assitance will be highly appreciated.
The constants are the same for both models, i.e:
Dm = 0.2;
L = 1.69e-2;
Km = 2.83e-2;
Kb = 2.82e-2;
Kf=5.8e-2;
J = 1.7767;
R = 0.5;
The block diagrams.
Final output velocity
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Paul
le 28 Mai 2021
The block diagrams don't represent the same system. The easiest way to see this is that the loop transfer functions are different between the two diagrams. The manipulation of the middle transfer function in the diagram on the left into the middle portion of the diagram on the right is incorrect.
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Paul
le 28 Mai 2021
They are all different. Figure 3 becuase of reason already explained. Figure 4 and Figure 5 differ because there is a term missing in the coefficent of s^3 in G2(s) in Figure 5.
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