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JRM Vol.16 No.6 pp. 643-648
doi: 10.20965/jrm.2004.p0643
(2004)

Paper:

Effects of the Lower Leg Bi-Articular Muscle in Jumping

Toru Oshima*, Kiyoshi Toriumi**, Tomohiko Fujikawa***,
and Noboru Momose*

*Department of Mechanical Systems Engineering, Faculty of Engineering, Toyama Prefectural University, Kurogawa 5180, Kosugi, Toyama 939-0398, Japan

**Faculty of Education, Toyama University, Gofuku 3190, Toyama 939-8555, Japan

***Department of Electronic Control Engineering, Toyama National College of Maritime Technology, Ebieneriya 1-2, Shinminato, Toyama 939-0293, Japan

Received:
July 7, 2004
Accepted:
September 28, 2004
Published:
December 20, 2004
Keywords:
lower leg, jumping, bi-articular muscle, jumping posture, ground reaction force
Abstract

We studied the effects of the lower leg bi-articular muscle in vertebrates in jumping. We used the proposed Jumping Jack model in computer simulation to analyze the impact of bi-articular muscle on postural jumping stability, energy transition caused by postural change, and the relationship between the ground reaction force and the center of gravity. We made a trial model and measured the jumping posture, ground reaction force, and jumping height to verify simulation results. The bi-articular muscle adjusted the ground reaction force so that the line of action invariably passed near the center of gravity and the conversion of elastic energy to rotational kinetic energy was suppressed, leading to a stable posture after takeoff.

Cite this article as:
Toru Oshima, Kiyoshi Toriumi, Tomohiko Fujikawa, and
and Noboru Momose, “Effects of the Lower Leg Bi-Articular Muscle in Jumping,” J. Robot. Mechatron., Vol.16, No.6, pp. 643-648, 2004.
Data files:
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