The purpose of this paper is to improve the NVD optical disk driver performance in combined sound system. Based on the optical valley of China-Wuhan R&D (research and development) red HD-NVD mecha system application, structural dynamic characteristics of the optical disk driver main parts and vibration isolation system can be analyzed by the multi-physical analysis software, ALGOR. Obtain the various modal parameters of vibration isolation system provides a solution of the unstable problem of the optical disk driver working performance which due to the low frequency vibration audio system. It is theoretically showed that the secondary vibration isolation system is feasible and laid the foundation for the optimization design of vibration isolation system.
In this paper, a 2-DOFs (two-degree-of-freedoms) right-angle-shape piezoelectric energy harvester is designed and analyzed for widening the operation bandwidth (-3dB bandwidth) of piezoelectric energy harvester in low frequency vibration environment. The finite element simulation results show that, the operation bandwidth of the optimized device comprises two operating frequency bands near the first resonant frequency 21.67Hz and second resonant frequency 48.75Hz, the operation bandwidth of two beams are 13.8Hz and 14.2Hz, the outputpowers reach 25mW and 41mW respectively. It is demonstrated that the 2-DOFs right-angle-shape piezoelectric energy harvester which reduces each order natural frequency, increases the output-power density, and ensures the wide operation bandwidth, could be efficient and adaptive in low-frequency vibration environment.
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