Wyniki wyszukiwania - BazTech

1

Comparative analysis for kinematics of 5-DOF industrial robotic manipulator

Manjaree S., Nakra B. C., Agarwal V.

Acta Mechanica et Automatica

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2015

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Vol. 9, no. 4

229--240

EN

This paper gives the kinematic analysis of a 5-DOF industrial robotic manipulator while considering wrist in motion. Analytical solutions have been obtained for forward kinematics and inverse kinematics to accurately position the end-effector of robotic manipulator in three dimensional spaces. For the first time, a hybrid neuro-fuzzy intelligent technique with two different membership functions has been studied and their performances are comparatively evaluated with analytical solutions. An experiment has been performed for a desired trajectory. It is seen that the results for the intelligent technique are reasonably in agreement with experiment. Also, the results obtained highlight the importance of selection of a particular membership function for robotic manipulators of industrial use.

2

Flexion and Extension Angles of Resting Fingers and Wrist

Lee K.-S., Jung M.- C.

International Journal of Occupational Safety and Ergonomics

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2014

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Vol. 20, No. 1

91--101

EN

This study determined flexion and extension angles of resting fingers and wrist in terms of forearm posture (neutral, pronation and supination) and shoulder flexion (0°, 45°, 90° and 135°). The participants participated in 12 angle measurements for 16 finger joints and wrist. The finger joints flexed more in supination than in neutral posture and pronation and the thumb flexed more than the other fingers because of the gravity and skin tension. This phenomenon became more apparent as the shoulder flexed. The carpometacarpal joint had the largest flexion angle in the thumb joints, whereas the proximal interphalangeal joints had the largest flexion angles in the other finger joints. The resting posture of the wrist extended of ~16° in any forearm postures when the shoulder was at 0°. The results of this study could be useful for rehabilitation tool and product designs.

3

Prototyp urządzenia do ćwiczeń czynnych w odciążeniu z oporem mięśni prostowników palców i nadgarstka

Musiolik A., Jureczko P.

Aktualne Problemy Biomechaniki

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2008

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z. 2

115--122

PL

W artykule zostały przedstawione dostępne na rynku urządzenia do rehabilitacji ręki. Dodatkowo przeprowadzono badanie w systemie BTS SMART w celu wyznaczenia prędkości i przyspieszeń ręki. Ponadto zaproponowano nowy model prototypu urządzenia do rehabilitacji ręki dla chorych z niedowładem połowicznym kończyny górnej lewej i prawej po urazach mózgowych.

EN

This paper is a demonstration of the prototype of the device to active practices in the relief with the resistance of the muscles rectifiers to the fingers, with the partial paresis of the upper limb left and / or right after cerebral injuries. Furthermore it includes a investigation of the hand in the BTS SMART Software and results.

4

Computer Professionals and Carpal Tunnel Syndrome (CTS)

Ali K. M., Sathiyasekaran B. W. C.

International Journal of Occupational Safety and Ergonomics

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2006

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Vol. 12, No. 3

319--325

EN

Carpal Tunnel Syndrome (CTS) is an important problem among computer professionals. Hence the prevalence of CTS among computer professionals and risk factors were studied. 648 subjects were selected from 4,276 computer professionals from 21 companies with a simple random sampling method. CTS was diagnosed based on clinical features.The prevalence of CTS was found to be 13.1% (95% CI 10.5–15.7%). Subjects with over 8 years of computer work, over 12 hrs of work per day and system administrators were at a higher risk for CTS (OR 3.3, 4.9 and 2.5 respectively). Flexed or extended hand position had higher risk for CTS. Higher risk for CTS was found with higher exposure to computer work. Ergonomic considerations are important in facilitating proper positioning of hand while working with a computer. Further studies on CTS risk factors among computer professionals are essential for planning prevention.