Biomedical subjects
Publications and source records attributed to A V Zinkovskiĭ.
A dynamic model for studying man's movements is proposed. Lagrange equations of the second order are used. Differential equations of the model are presented in the matrix form, and all the coefficients involved are calculated from recurrent formulae. The dynamic model described is easily algorythmized. Differentiating operations can be thus avoided which are realized on electron computers with difficulities.
Dynamics of control and construction of man's movement was modeled on a computer. Measuring--computing complex was elaborated which involved means for movement recording, mathematical model and program provision for computing direct and inverse problems of dynamics. Equations of movement and subsequent operations were carried out directly on the computer. Cubic smoothing splines were used during approximation and differentiation of the experimental data. Two human concrete movements were studied. It was found that control over man's elementary movements was realized according to TAU laws in complex movements controling and stabilizing functions of the movements can be distinguished.
An anthropomorphic model was elaborated, which permitted estimation of foot elasticity in man's movements. The foot in the model is presented as an elastic rod. In this model it turned necessary to introduce additional limitations as the zero moment point in support, and the effect of foot elasticity on the dynamics of man's movement was estimated. The movements of the model performing a jump synthetized on a computer proved to be adequate to similar movement of the man.
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The control of man's movements during adaptation to an altered gravity field was modelled by mathematical methods. Two types of movements were investigated: forearm displacements with various loads and repulsions from a support in zero-g and at high g's. It has been shown that movement coordination in altered gravity fields can be maintained due to a rearrangement of the control over muscle contraction which includes changes in the amplitude and pattern of joint momenta in harmony with the gravity changes.