نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، دانشکدهی مهندسی مکانیک، دانشگاه یزد، یزد، ایران
2 استادیار، دانشکدهی مهندسی مکانیک / هستهی علمی سامانههای پشتیبان در توسعهی سلامت، دانشگاه یزد، یزد، ایران
3 دکتری بیومکانیک ورزش، هستهی علمی سامانههای پشتیبان در توسعهی سلامت ، دانشگاه یزد، یزد، ایران
کلیدواژهها
موضوعات
عنوان مقاله English
نویسندگان English
Finding the center of rotation (COR) is needed for defining the anatomical axis of the skeletal system and for the kinematic calculation of joints in biomechanical studies. For this purpose, predictive and functional methods can be used. In the predictive methods, regression equations obtained from anthropometric measurements are used, and in the functional methods, the relative motion of the two adjacent segments is used to find COR. The purpose of this study is to formulate the circle fitting algorithm as a functional method with two analytical and optimization solutions. In order to evaluate the algorithm, error analysis was performed by both analytical and numerical methods. Also, effective factors in error estimating of COR position such as standard deviation of measurement system error (σ), rotation angle (α) and the distance between marker and COR (r), was evaluated. The results showed a high correlation (r=0.99) between analytical and numerical solution, which proved the accuracy of the error analysis. In this study, optimization method according to the accuracy of better estimates in low quantities α, less influence on high quantities σ and high speed in problem solving, can be taken into consideration to reconstruct human movements in biomechanical studies. Use of functional methods, eliminates the need for attaching markers to anatomical landmarks and provides a new development in motion data acquisition.
کلیدواژهها English