Department News
Use of Dual Euler Angles to Describe General Spatial Movements of Human Joints
Seminar Date
2001-11-07
Author
오군규
Date
2001-11-07
Views
1478
1. 제목 : Use of Dual Euler Angles to Describe General Spatial Movements of Human Joints
2. 연사 : Dr. Wangdo Kim, Associate Professor at Nanyang Technological University in Singapore
3. 일시 : 2001년 11월 19일 (월) 16:00
4. 장소 : 301동 1512호
5. 내용 :
Background: Research in biomechanics is moving away form two dimensional (2D) description of human movements towards three-dimensional (3D) analyses. This study presents a modified Euler angles method--the dual Euler angles approach-- to describe general spatial human joint motions.
Method: In the dual Euler angles approach, three-dimensional joint motion is considered as three successive screw motions with respect to the axes of the moving segment coordinate system; accordingly, the screw motion displacements are represented by dual Euler angles. The algorithm for calculating dual Euler angles from coordinates of markers on the moving segment is also provided in this study. As an example, the proposed method is applied to describe motions of ankle joint complex (AJC) during dorsiflexion-plantar flexion. A ‘Flock of Birds’ electromagnetic tracking device (FOB) was used to measure joint motion in vivo.
Results: Preliminary accuracy tests on a gimbal structure demonstrate that the mean errors of dual Euler angles evaluated by using source data from FOB are less than 1° for rotations and 1mm for translations respectively.
Conclusion: Based on the pilot study, FOB is feasible for quantifying human joint motions using the dual Euler angles approach.
6. 저자 약력
Dr. Wangdo Kim, Associate Professor at Nanyang Technological University in Singapore
Ph.D., Mechanical Engineering, Lehigh University, Bethlehem, Pennsylvania, USA June 1991.
M.S., Mechanical Engineering, Lehigh University, Bethlehem, PA, USA, October 1986.
B.S., Mechanical Engineering, Seoul National University, Seoul, Korea, January 1979.
7. 문의 : 기계항공공학부 이건우 교수 (☏ 880-7141)
2. 연사 : Dr. Wangdo Kim, Associate Professor at Nanyang Technological University in Singapore
3. 일시 : 2001년 11월 19일 (월) 16:00
4. 장소 : 301동 1512호
5. 내용 :
Background: Research in biomechanics is moving away form two dimensional (2D) description of human movements towards three-dimensional (3D) analyses. This study presents a modified Euler angles method--the dual Euler angles approach-- to describe general spatial human joint motions.
Method: In the dual Euler angles approach, three-dimensional joint motion is considered as three successive screw motions with respect to the axes of the moving segment coordinate system; accordingly, the screw motion displacements are represented by dual Euler angles. The algorithm for calculating dual Euler angles from coordinates of markers on the moving segment is also provided in this study. As an example, the proposed method is applied to describe motions of ankle joint complex (AJC) during dorsiflexion-plantar flexion. A ‘Flock of Birds’ electromagnetic tracking device (FOB) was used to measure joint motion in vivo.
Results: Preliminary accuracy tests on a gimbal structure demonstrate that the mean errors of dual Euler angles evaluated by using source data from FOB are less than 1° for rotations and 1mm for translations respectively.
Conclusion: Based on the pilot study, FOB is feasible for quantifying human joint motions using the dual Euler angles approach.
6. 저자 약력
Dr. Wangdo Kim, Associate Professor at Nanyang Technological University in Singapore
Ph.D., Mechanical Engineering, Lehigh University, Bethlehem, Pennsylvania, USA June 1991.
M.S., Mechanical Engineering, Lehigh University, Bethlehem, PA, USA, October 1986.
B.S., Mechanical Engineering, Seoul National University, Seoul, Korea, January 1979.
7. 문의 : 기계항공공학부 이건우 교수 (☏ 880-7141)
