If the driver is present, modifying the initial position and velocity of the mannequin file allows the model to move and analyze.
Then, If I know the initial position and final position, Is there any way to predict the model's motion and make it move?
If you want a driver where you specify the initial starting point and a final position, i would use an AnyKinEqInterpolDriver with this driver you can specify an interpolation function. In it's simplest form this could be start and end positions.