Zhuang Min-20151130-TOAUTOCJ-MS

The vibration velocities of the seat platform and traditional mechanical reduction vibration device were measured through tests, which provided certain basis for proposing and design of the parallel mechanism with six degree of freedom in subsequent paragraphs. Adopting the parallel mechanism as the main part of the seat and the active joints with spring damping elements as the reduction vibration actuator, then the reduction vibration seat model with the 3-PRPS parallel mechanism with six degree of freedom was established. With position and attitude of the mechanism as the premise, stability indexes of the reduction vibration seat in motion were put forward, and then getting the task space of moving platform by the inverse solution of the mechanism position. To achieve reduction vibration effectively, branched chain velocity matrix was built by vector method. Optimal parameter values were obtained by MATLAB numerical calculation to improve the reduction vibration space and flexibility. Finally, simulation analysis was carried out on the results. Meanwhile, comparison was carried out on the reduction vibration effects of the parallel mechanism with six degree of freedom and traditional mechanical reduction vibration device. The results show that this mechanism has a better vibration reduction performance, which provides a new thought for designing reduction vibration seat. Meanwhile, it also provides important reference for application and research of other parallel mechanisms.