Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Design Optimization of Moving-Coil Type Linear Actuator Using Level Set Method and Phase-Field Model

레벨셋법과 페이즈 필드 모델을 이용한 가동코일형 리니어 액추에이터 최적설계

  • 임성훈 (한양대학교 자동차공학과) ;
  • 오세안 (한양대학교 자동차공학과) ;
  • 민승재 (한양대학교 미래자동차공학과) ;
  • 홍정표 (한양대학교 미래자동차공학과)
  • Received : 2011.04.12
  • Accepted : 2011.06.21
  • Published : 2011.10.01
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Abstract

A moving-coil type linear actuator has been widely used in the system reciprocating short stroke because of its several advantages, such as the structural simplicity, low weight and a fast control response speed. This paper presents a design approach for improving the actuating performance with a clear expression of optimal configuration represented by a level set function. The optimization problem is formulated to minimize the variation of magnetic force at every moving displacement of the mover for fast and easy control. To consider the manufacturability of actuator, the concept of phase-field model is incorporated to control the complexity of structural boundaries. To verify the usefulness of the proposed method, the core design example of cylindrical linear actuator is performed.

가동코일형 리니어 액추에이터는 다른 형식의 액추에이터에 비해 구조가 간단하고 제어가용이하여 다양한 산업 분야에 활용되고 있다. 본 연구에서는 리니어 액추에이터의 가동 특성을 향상시키기 위해 가동자의 모든 동작점에서의 추력을 반영한 목적 함수를 구성하고 최적설계 문제를 정식화하였다. 명확한 형상표현을 위해 레벨셋 함수를 설계변수로 설정하여 최적설계를 진행하고 성능과 생산성을 동시에 만족하는 액추에이터를 설계하기 위해 페이즈 필드 모델의 개념을 최적설계에 적용하여 최종형상의 단순화를 고려하였다. 제안한 기법의 효용성을 확인하기 위해 액추에이터 진동과 소음의 원인인 추력의 변동폭을 최소화하기 위한 코어 설계를 수행하여 추력의 변동을 감소시킬 수 있는 최적 형상을 제시하였고 복잡도 계수에 의한 최종 형상의 단순화도 확인하였다.

Keywords

References

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