• International Society Activities

Member, American Society of Mechanical Engineering

Delegate and Science committee, ER/MR International Conference

• International Journal Editor Activities

Associate Editor (02. 07 - Present), Journal of Intelligent Material Systems and Structures (SCI Expanded), Sage Publication, London, U. K.

Member of Editorial Board (02. 11 - Present), International Journal of Vehicle Autonomous Systems, Inderscience Enterprises Limited, London, U.K.

Guest Editor (02.01-02.12), International Journal of Vehicle Design (SCI Expanded), Inderscience Enterprises Limited, London, U.K.

Member of Editorial Board (03. 1 - Present), International Journal of Control,
Automation, and Systems (SCI Expanded)     
      
Member of Editorial Board (05. 07 - Present), International Journal of Intelligent
Systems Technologies and Applications, Inderscience Enterprises Limited, London, U.K.

• International Journal Paper Reviewer/Committee

ASME Journal of Dynamic Systems, Measurements, and Control

ASME Journal of Mechanical Design

Mechanism and Machine Theory

Automatica

Journal of Sound and Vibration

AIAA Journal

Journal of Robotic Systems 

Smart Materials and Structures

Journal of Intelligent Material Systems and Structures 

Mechatronics

International Journal of  Control

Control and Cybernetics

IEEE Proceedings : Control Theory and Applications

IEEE Transactions on Control Systems Technology

International Journal of Solids and Structures

Materials and Design

Asian Journal of Control

Journal of Vibration and Control

IEEE Transactions on Automatic Control

International Journal of Systems Science

• International Conference Paper Reviewer/Committee

American Control Conference Papers('93, '95)

International Conference on ER & MR Fluids and Applications('95-present)

International Symposium on Smart Structures and Materials('97-present)

International Conference on Adaptive Structures and Technologies('03-present)

• INVITED SPEAKER AT CONFERENCE

Invited Speaker, The 6th International Conference on Electrorheological Fluids, Magnetorheological Suspensions, and Their Applications, Yonezawa, Japan,
'97.7.22-7.25, "Control Characteristics of ER Devices".

Invited Speaker, The 7th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Honolulu, Hawaii, U.S.A., July 19-23, 1999,
"Active Control of ER Valves with Application to Seaport Cargo Handling System".

Invited Speaker, The 8th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Nice, France, July 19-13, 2001, "Vibration Isolation of Structural Systema Using Squeeze-Mode ER Mounts".

Invited Speaker, The 9th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Beijing, China, August 29-September 3, 2004,
"Design Program in Graphic User Interface Environment for Automobile ER Devices".
 
Invited Speaker, The 10th International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Lake Tahoe, USA, June 18-22, 2006, "Field Test on Vibration Control of Vehicle Suspension System Featuring ER Shock Absorbers".

Keynote Lecturer, The International Symposium on Smart Materials for Engineering & Biomedical Application (SMEBA) 2006,  September 21-23, 2006, KAIST, Daejon, Korea, “Vibration Control of Vehicle Suspension System Featuring ER Shock Absorbers”

Invited Speaker, The 15th International Congress on Sound and Vibration, Daejeon, Korea, July 7-10, 2008, "Vibration Control Applications Using Smart Material Actuators"

• 국내 학회 활동

대한 기계 학회 정회원
한국 정밀 공학회 정회원
한국 자동차 공학회 정회원
한국 항공우주 학회 정회원
한국 유변학회 정회원
제어.자동화.시스템공학회 정회원
한국 소음진동공학회 종신회원
한국공학한림원 준회원

대한 기계학회 동역학 및 제어부문 운영위원회 위원 (1992. 1∼1993. 12)
대한 기계학회 공업교육위원회 위원 (1996. 1∼1997. 12)
한국 소음진동공학회 편집이사 (1995. 1∼2000. 12)
한국 소음진동공학회 평의원 (1995. 1∼2020. 12)
한국 소음진동공학회 기획위원 (2001. 1∼2002. 12)
한국 정밀공학회 편집위원 (2002.1∼2003.12)
대한 기계학회 동역학 및 제어부문 위원 (2003.1.1 1∼2004.12.31)
한국 소음진동공학회 편집이사 (2005. 1 ~ 2008. 12)

• 국내 학회지 논문심사위원

대한 기계학회 논문집
한국 정밀공학회지
한국 항공우주학회지
한국 소음진동공학회지
한국 자동차공학회 논문집
한국 복합재료 학회지
대한 전자공학회 논문집
제어.자동화.시스템 공학회 논문집