Modal Analysis And Dynamic Performance Research On Shock Isolation Of Optical Disc Driver

With the speed increase of optical disc driver, principal axis motor must enhance its velocity. The fastest rotated speed of principal axis motor of optical disc driver has reached about 12000rpm nowadays. The vibrancy aroused by imbalance will prick up if only the optical disc exits eccentricity quality when principal axis motor rotated at so high speed. It is very difficult for optical head to focus and follow track. In order to increase optical disc driver speed to transmit data, avoiding the vibrancy of optical disc driver is an important problem to resolve.The main aim to research the vibrancy of optical disc driver is analyzing the dynamic performance of optical disc driver and finding way to restrain its vibrancy. The work from three aspects has been done to study the problem. First, the influence, such as the vibrancy of optical disc driver to optical head focus and servo, rand spirit to the vibrancy of optical disc driver system and the interrelated theory, like the different part of optical disc driver performance and the response inspirited by rand has been analyzed and researched. The main part models of optical disc driver were built and their modal analysis was made in ANSYS environment at follow. Finally, it has been introduced how to build the models that affected the vibrancy of optical disc driver in ADMAS and how to simulate the whole system and optimize the damp mat parameters. It was necessary to gain some physics parameters to finish the simulation and model analysis by experiment.The main parts performance and the factors affected the vibrancy of optical disc driver have been known more about by the research. At the same time, optimizing and studying the damp mat parameters reduced the vibrancy. The simulation result has indicated it.