Two mass system

[icnosvbovwb]

Dear @jjonkman


I established a two mass system drivetrain dynamic model based on the equation in Figure 1.
Where 1/J_w=1/38759228/97^2, 1/J_e=1/534.116, K=867637000/97^2, D=6215000/97^2
Q1:Now I want to run this simulink model, but I don't know what the two input parameters (Tw and Te)represent?
Q2:How should I input these two parameters?
Q3:What units were these two parameters inputted?

[jjonkman]

Dear @icnosvbovwb,

Tw and Te in your two-mass model are the aerodynamic torque and electrical generator torque, respectively. The units should be consistent with rest of your equations of motion (presumably they should have the units of N*m). I'm not sure why you appear to be expressing the parameters relative to the high-speed shaft; I would think it would be more naturally to express the parameters relative to the low-speed shaft.

A similar two-mass generator-rotor drivetrain model was recently discussed on our forum: https://forums.nrel.gov/t/drivetrain-dynamic-model/1864. I suspect the discussion there is useful to you.

Best regards,