Modeling movements of a long hand-held tool with effects of moments of inertia.
The current experiment aimed to investigate the effects of weight position on movement time in target acquisition tasks. Subsequently, a simple mathematical model was developed to describe the movement time with the moments of inertia. Ten right-handed participants conducted continuous Fitts pointing tasks using a laparoscopic instrument as a long hand-held tool. The results showed significant effects of weight position on movement time. Furthermore, an extended Fitts' law model is proposed for the moments of inertia produced by the hand, instrument, and a constant mass in different positions. This predictive model accounted for 63% of the variance in movement time. The predictive model proposed in the present study can be applied not only to estimate movement time given a particular target width, instrument movement amplitude, and weight position of a long hand-held tool but also to standardize movement time and establish training standards.
Department of Industrial Management, National Taiwan University of Science and Technology, Taipei, Taiwan.
Chiuhsiang Joe
CJ
Lin
Department of Industrial Management, National Taiwan University of Science and Technology, Taipei, Taiwan. Electronic address: g9302405@cycu.org.tw.
Hung-Jen
HJ
Chen
D000328:Adult; D001696:Biomechanical Phenomena; D004215:Distance Perception; D005260:Female; D006801:Humans; D020706:Laparoscopes; D008297:Male; D008962:Models, Theoretical; D011597:Psychomotor Performance; D011930:Reaction Time; D012016:Reference Values; D053001:Tool Use Behavior; D016474:Weight-Bearing; D055815:Young Adult
Fitts’ law; Long hand-held tool; Moment of inertia; Weight position