[ASME ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - Washington, DC, USA (August 28–31, 2011)] Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies - Multibody Dynamics Model for Predicting the Vibration Response and Transient Tooth Loads for Planetary Gear Systems