Almost all multidisciplinary engineering systems have significant mechanical content. The mechanical part is often the most determining factor for the final performance of the total mechatronic system.
The key attributes of a mechanical system are inertia (mass and mass moment of inertia), compliance (springiness), and energy dissipation (friction), and these attributes are distributed throughout the mechanical system. The variables used to describe mechanical system behavior are force (or torque) and velocity (or angular velocity), the product of which is power. The parasitic effects in mechanical systems include friction, backlash, compliance, and resonance.