Robust Design of Lens Actuator (2nd Report) 

－Realization of a Basic Function by Streamlining Coupled Simulation for Multiple Physical Field－

Abstract

In the first stage of the robust design of lens actuators, previous practice has been to evaluate each subsystem independently. For more efficient research, in this study it was decided to evaluate the generic function of the total system. As a system generally involves multiple physical fields, a CAE evaluation of the total system requires coupled simulations. The electromagnetic actuator systems used in lens actuators have a structural field and a magnetic field, requiring a coupling of structural simulation and magnetic simulation. The huge amounts of time taken by such coupled simulations have been a problem. When the generic function of the total system was evaluated in this study, the evaluation model was rationalized and more efficient coupling techniques were devised. As a result, it became possible to optimize the total system, stabilize its function, and improve its quality. The effectiveness of the new techniques was confirmed in a separate application to an SIDM (Smooth Impact Drive Mechanism) actuator, another system having structural and magnetic fields.