GEARING WITH VARIABLE GEAR RATIO APPLIED IN MECHANICAL SYSTEMS
نویسندگان
چکیده
منابع مشابه
Stuck in gear: age-related loss of variable gearing in skeletal muscle.
Skeletal muscles power a broad diversity of animal movements, despite only being able to produce high forces over a limited range of velocities. Pennate muscles use a range of gear ratios, the ratio of muscle shortening velocity to fiber shortening velocity, to partially circumvent these force-velocity constraints. Muscles operate with a high gear ratio at low forces; fibers rotate to greater a...
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Muscle fiber architecture, i.e., the physical arrangement of fibers within a muscle, is an important determinant of a muscle's mechanical function. In pennate muscles, fibers are oriented at an angle to the muscle's line of action and rotate as they shorten, becoming more oblique such that the fraction of force directed along the muscle's line of action decreases throughout a contraction. Fiber...
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A fundamental feature of pennate muscles is that muscle fibers are oriented at an angle to the line of action and rotate as they shorten, becoming more oblique throughout a contraction. This change in fiber orientation (pennation angle) can amplify the shortening velocity of a fiber and increase output velocity of the muscle. The velocity advantage resulting from dynamic changes in pennation an...
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ژورنال
عنوان ژورنال: Acta Mechatronica
سال: 2020
ISSN: 2453-7306
DOI: 10.22306/am.v5i1.57