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please help! new to modeling DC motor using simulink

please help! new to modeling DC motor using simulink

please help! new to modeling DC motor using simulink

(OP)
Dear Simulink experts,

I just started learning simulink. The project I am testing is very simple:

A DC motor attached to a linkage. The linkage is attached to a door slides open and close. I model the DC motor in sumulink. One of the inputs is inertia. Is it correct that the inertia is the inertia of the door + the linkage? If this is the case, how can I obtain the inertia of the door + linkage? Some CAD package gives moment of inertia of solid parts but, usually based on relative to its center of mass or a global coordinate. And in all 3 direction, ie, Ixx/Iyy/Izz. So, I am not sure about this. In addition, the door/linkage move during motion. Does the inertia change during motion?

I am using simulink and NX motion co-simulation. NX motion will model the door and the linkage.

It will be appreciated if someone here can give me some guidance.

Pei-Ying

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