Effective Electron Vibration Coupling by Ab Initio Methods Journal of Chemical Theory and Computation A Survey of Coupled Vibration Characteristics and Control Methods in Maglev Transportation: Challenges, Methods and Progress ScienceDirect COUPLING TYPES 4 1 Definition Couplings are mechanical components used to connect two rotating shafts for transmitting power and torque. They are designed to compensate for misalignment, absorb vibration, and reduce shock Unbalance is one of the most common causes of machine vibration but not all unbalance is the same., In this Balancing 101 video, we break down the three main types: Static, Couple, and Dynamic.,