Abstract
The purpose of this study is to understand the force and energy balance in the wobble plate drive mechanism referred to as the virtual ellipse drive (VED). The moving affine constraint presented by the precessing wobble plate's contact with the stator and rotor plates offers a subtlety that is difficult to account for in a standard classical mechanics approach. This subtlety has made it difficult to account for energy conservation in simulations, even when including vibration and friction.