The Development of a Flat Parallel Structure Mechanism with One Degree of Freedom for Excitation of Vibrations on Any Kinematic Screw

Nowadays, parallel structure mechanisms are increasingly used in various industries. In this paper, the authors study a vibration table mechanism derived from a well-known parallel structure mechanism that contains three kinematic chains driven by three motors. However, to obtain small vibrations on any kinematic screw, coordinated action of all the three drives would be required. To address this issue, a flat parallel structure mechanism with three kinematic chains is synthesized. The mechanism is equipped with one central motor transmitting motion to the output link. The proposed mechanism does not require a complex control system and feedbacks to maintain a given ratio between the components of the kinematic screw.

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