Detc / Dac 3978 Robust Design for Dynamic Performance : Optical Pick - up Example

To achieve high quality and reliability in mechatronics products, thorough consideration of dynamic performance in structural design is essential. Typical examples include the design of optical pick-ups for disk related products, such as Compact Disc (CD) drives, and Magneto-optical Disc (MO) drives. Many researchers have developed design methodologies to optimize the nominal dynamic characteristics. Recently, robustness of dynamic performance has become an important issue in addition to optimizing nominal performance. Engineers seek to improve the quality of products by minimizing the effects of numerous variations that arise during the product’s manufacturing and life-cycle operation. This paper reports on the application of the robust design concept to the dynamic design of an optical pick-up actuator focusing on shape synthesis using computer models and design of experiments. By comparing this approach to analytical sensitivity solution, the authors provide a rationale for using the relatively simple statistical approach with orthogonal arrays.