کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10432278 | 910242 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Point of optimal kinematic error: Improvement of the instantaneous helical pivot method for locating centers of rotation
ترجمه فارسی عنوان
نقطه خطای سینماتیکی بهینه: بهبود روش چرخشی لحیم کاری لحظه ای برای قرار دادن مراکز چرخش
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کلمات کلیدی
مرکز چرخش محور چرخش لحظه ای، کالیبراسیون کارکردی بهینه سازی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
This paper proposes a variation of the instantaneous helical pivot technique for locating centers of rotation. The point of optimal kinematic error (POKE), which minimizes the velocity at the center of rotation, may be obtained by just adding a weighting factor equal to the square of angular velocity in Woltring׳s equation of the pivot of instantaneous helical axes (PIHA). Calculations are simplified with respect to the original method, since it is not necessary to make explicit calculations of the helical axis, and the effect of accidental errors is reduced. The improved performance of this method was validated by simulations based on a functional calibration task for the gleno-humeral joint center. Noisy data caused a systematic dislocation of the calculated center of rotation towards the center of the arm marker cluster. This error in PIHA could even exceed the effect of soft tissue artifacts associated to small and medium deformations, but it was successfully reduced by the POKE estimation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 47, Issue 7, 7 May 2014, Pages 1742-1747
Journal: Journal of Biomechanics - Volume 47, Issue 7, 7 May 2014, Pages 1742-1747
نویسندگان
Helios De Rosario, Álvaro Page, Vicente Mata,