Analysis and Optimization of a Vibration Isolation Platform Based on 6-DOF Parallel Mechanism

Abstract:

In this paper a 6-DOF(Degree of Freedom) vibration isolation platform with structural configuration of 3CPS (3 Cylindrical-Prismatic-Spherical)-1UPS (1 Universal-Prismatic-Spherical) parallel mechanism is proposed. Firstly, the dynamic model is developed through virtual work principle. The transfer function and the complex frequency response function were obtained from the dynamical equation. Then, 36 amplitude frequency diagrams are obtained from the frequency response function. By analyzing the 36 amplitude frequency diagrams, 10 vibration coupling terms were chosen. The range of the spring stiffness coefficient and the range of the damping coefficient of the magneto-rheological damper are determined by analyzing the acceleration transmissibility of the 10 vibration coupling terms. At last, an integrated optimization combining structural and controller optimization is developed. The optimal parameters of the parallel mechanism are obtained through Genetic Algorithm (GA). This work is significant for the prototype design and verification of the vibration isolator.

• Periodical: Key Engineering Materials (Volume 625)
• Pages: 748-753
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.625.748
• Online since: August 2014
• Authors: Teng Da Yi*, Bing Li, Nan Wang
• Keywords: Dynamic, Optimization, Parallel Mechanism, Vibration

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