نتایج جستجو برای: off and toe

تعداد نتایج: 16847256  

Journal: :journal of computational applied mechanics 0
majid sadedel center of advanced systems and technologies (cast), school of mechanical engineering, college of engineering, university of tehran, tehran, iran. aghil yousefikoma center of advanced systems and technologies (cast), school of mechanical engineering, college of engineering, university of tehran, tehran, iran faezeh iranmanesh center of advanced systems and technologies (cast), school of mechanical engineering, college of engineering, university of tehran, tehran, iran.

the main objective of this article is to optimize the walking pattern of a 2d humanoid robot with heel-off and toe-off motions in order to minimize the energy consumption and maximize the stability margin. to this end, at first, a gait planning method is introduced based on the ankle and hip joint position trajectories. then, using these trajectories and the inverse kinematics, the position tra...

The main objective of this article is to optimize the walking pattern of a 2D humanoid robot with heel-off and toe-off motions in order to minimize the energy consumption and maximize the stability margin. To this end, at first, a gait planning method is introduced based on the ankle and hip joint position trajectories. Then, using these trajectories and the inverse kinematics, the position tra...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1380

هدف تحقیق حاضر تعیین تاخیر برخی اندازه های آنتروپومتریکی چون طول دست ، تنه نشسته، طول پا، طول قد و تیپ بدنی بر روی میزان انعطاف پذیری در آزمونهای خمش به پایین (toe-touch) و خمش به جلو(sit and reach) است .

Journal: :Journal of biomechanics 2003
Saryn R Goldberg Sylvia Ounpuu Scott L Delp

The diminished knee flexion associated with stiff-knee gait, a movement abnormality commonly observed in persons with cerebral palsy, is thought to be caused by an over-active rectus femoris muscle producing an excessive knee extension moment during the swing phase of gait. As a result, treatment for stiff-knee gait is aimed at altering swing-phase muscle function. Unfortunately, this treatment...

Journal: :Journal of biomechanics 2006
Saryn R Goldberg Sylvia Ounpuu Allison S Arnold James R Gage Scott L Delp

Stiff-knee gait is a movement abnormality in which knee flexion during swing phase is significantly diminished. This study investigates the relationships between knee flexion velocity at toe-off, joint moments during swing phase and double support, and improvements in stiff-knee gait following rectus femoris transfer surgery in subjects with cerebral palsy. Forty subjects who underwent a rectus...

Journal: :Gait & posture 1999
G P Austin G E Garrett R W Bohannon

This study investigated the effect of obstacles of different heights on the locomotion of 15 healthy subjects. The following parameters were studied: (1) the distance of the toe and heel markers from the obstacle during toe-off and heel contact, respectively, (2) the minimum clearance distance of the toe and heel markers, and (3) the angular displacements and velocities of the hip, knee, and an...

Journal: :Journal of applied biomechanics 2009
Christopher A Miller Alan H Feiveson Jacob J Bloomberg

Gait kinematics have been shown to vary with speed and visual-target fixation distance, but their combined effects on toe trajectory during treadmill walking are not known. The purpose of this investigation was to determine the role of walking speed and target distance on vertical toe trajectory during treadmill walking. Subjects walked on a treadmill at five speeds while performing a dynamic v...

Journal: :Journal of biomechanics 2004
Frank C Anderson Saryn R Goldberg Marcus G Pandy Scott L Delp

A three-dimensional dynamic simulation of walking was used together with induced position analysis to determine how kinematic conditions at toe-off and muscle forces following toe-off affect peak knee flexion during the swing phase of normal gait. The flexion velocity of the swing-limb knee at toe-off contributed 30 degrees to the peak knee flexion angle; this was larger than any contribution f...

Journal: Physical Treatments 2014

Purpose: Given the high prevalence of varus malalignment of the knee and the consequences of walking on different surfaces on this malalignment, the aim of the present study was to investigate the effect of walking inclination on knee angle in the frontal plane of patients with varus malalignment. Methods: 18 male subjects with varus malalignment classified at grade 3 bowleg, within the a...

2018
Rui Zhang Qiaoli Ji Dianlei Han Haijin Wan Xiujuan Li Gang Luo Shuliang Xue Songsong Ma Mingming Yang Jianqiao Li

In ostriches, the toes are the only body parts that contact loose sand surfaces. Thus, toe interphalangeal joint motions may play vital biomechanical roles. However, there is little research on ostrich phalangeal joint movements while walking or running on sand. The results from the three-dimensional motion track analysis system Simi Motion show that gait pattern has no significant effect on th...

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