A new method for the simultaneous measurement of the moment of inertia, the damping coefficient and the location of the centre of mass of a body segmentin situ

Hatze, H.

doi:10.1007/bf00999935

Cited by 48 publications

(10 citation statements)

References 7 publications

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“…which is exactly what we set out to achieve, because the effective striking mass does not figure in the equation. The moment of inertia of the shank–foot segment is referred to in many textbooks, but can also be found in a quick‐release experiment ( Hatze 1975; Winter 1990). Some textbooks have tables of moments of inertia of different body segments where the weight of the subject is the only parameter needed.…”

Section: Collision Between Foot and Ballmentioning

confidence: 99%

Collisions in soccer kicking

1999

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An equation to describe the velocity of the soccer ball after the collision with a foot was derived. On the basis of experimental results it was possible to exclude certain factors and only describe the angular momentum of the system, consisting of the shank, the foot and the ball, leading to an equation that was simple and useful. Furthermore, it was found that the main reasons for changes in ball velocity are the velocity of the foot before impact and the coefficient of restitution. The mass of the shank–foot segment does not influence the velocity of the ball significantly.

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Section: Collision Between Foot and Ballmentioning

confidence: 99%

Collisions in soccer kicking

1999

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“…By using an averaged estimate of arm-tissue density of 0.001 1 kg/cm3 (Dempster,195% the mass was computed. We measured the moment of inertia by modeling the arm and hand as a series of disks, each 5-cm thick (Hatze, 1975). We calculated and added together the moments of the disks to determine the moment of inertia of the arm and hand, as follows:…”

Section: Anthropometric Paranietersmentioning

confidence: 99%

Resonance Tuning in Rhythmic Arm Movements

Hatsopoulos

Warren

1996

Journal of Motor Behavior

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The hypothesis was tested that the preferred frequency of rhythmic movement corresponds to the resonant frequency of the muscle-limb system, as proposed by the hybrid spring-pendulum model (Kugler Turvey, 1987). In contrast to previous studies, the resonant frequency and stiffness of the system were estimated independently, which permitted quantitative predictions of the preferred frequency to be made. Human subjects (N = 5) were asked to oscillate their forearms in the vertical plane at their preferred frequency under conditions of added mass and external spring loading. Subjects also oscillated their arms at frequencies below and above the preferred frequency, which enabled the investigators to estimate the resonant frequency and stiffness of the elbow joint by using the phase transfer method (Viviani, Soechting, Terzuolo, 1976). The preferred frequency corresponded to the resonant frequency of the muscle-limb system under each condition, as predicted. The oscillation amplitude varied inversely with the preferred frequency, which was also predicted. Finally, the internal joint stiffness was modulated so that it matched the impedance of the external springs but was unaffected by added mass. The results are consistent with an autonomous oscillator model that incorporates proprioception about the dynamics of the periphery.

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“…There are a number of experimental techniques for determining the inertia parameters of the body segments of a living individual (Bouisset and Pertuzon, 1968;Hay, 1973;Hatze, 1975;Tichonov, 1976). However, none of these techniques is suitable for determining moments of inertia of a central segment such as the pelvis, or for determining the moment of inertia of a limb about its longitudinal axis.…”

Section: Introductionmentioning

confidence: 99%

The simulation of aerial movement—II. A mathematical inertia model of the human body

Yeadon

1990

Journal of Biomechanics

313

305

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A mathematical inertia model which permits the determination of personalized segmental inertia parameter values from anthropometric measurements is described. The human body is modelled using 40 geometric solids which are specified by 95 anthropometric measurements. A 'stadium' solid is introduced for modelling the torso segments using perimeter and width measurements. This procedure is more accurate than the use of elliptical discs of given width and depth and permits a smaller number of such solids to be used. Inertia parameter values may be obtained for body models of up to 20 segments. Errors in total body mass estimates from this and other models are discussed with reference to the unknown lung volumes.

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A new method for the simultaneous measurement of the moment of inertia, the damping coefficient and the location of the centre of mass of a body segmentin situ

Cited by 48 publications

References 7 publications

Collisions in soccer kicking

Collisions in soccer kicking

Resonance Tuning in Rhythmic Arm Movements

The simulation of aerial movement—II. A mathematical inertia model of the human body

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