I'm trying to calculate the torque needed to rotate an array of solar panels. I've found some formulas for calculating torque, but they require moment of inertia. I designed this array in Autodesk Inventor and it gives me multiple options for the moment of inertia calculation. I've tried asking on the autodesk forums but no one will help me. I would be fine calculating this manually if need be also.
The pivot point is in the center of the array and the dimensions are: 117" x 1.5" x 129 1/16". The weight is 470 pounds and the center of gravity is in the center of the axis of rotation. The pivot is on the center of the 117" side. (see drawing below)
Which of these moments of inertia would I want to use in this equation, should I use principal global or center of gravity? I'm currently on the principal tab and it gives me I1, I2, and I3. Are any of these the right one?
The speed of rotation is no more than 0.001 rpm. (0.00003333333 π rad/s) Does anyone know what value I should use for the angular acceleration on a dc motor? I know very little about physics and I'm having trouble.