[2] Optimal design of the optical pickup suspension plates using topology optimization
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G.H. Yoon and Y. Y. Kim. AIAA journal 41, no. 9 (2003): 1841-1843.
In this work we deal with the design optimization of the suspension plates of a high-speed optical pickup used in DVDs or CD-ROMs. Figure 1 shows a typical pickup assembly with the bobbin and the suspension plates. The four suspension plates are made identical to minimize unwanted motions. The structural design issues and related references on this subject can be found in Kim et al.1 and Kim and Lee.2 The speci. c design target here is to increase the torsional eigenfrequency of the pickup as high as possible while keeping the focusing eigenfrequency between 25 and 35 Hz and the tracking eigenfrequencybetween 43 and 57 Hz. These frequency ranges are set to meet design constraints such as servocontrollability.To . nd an optimal plate shape, we employ the topology optimization methodology.3;4 Speci. cally, the multiscale topology optimizationmethod5 will be used to enhance the solution efficiency.