Determination of the ballistic-temporal characteristics of the motion of the center of mass of the paratrooper, dropped from the plane
To determine the ballistic-temporal characteristics of the motion of the center of mass of the paratrooper, we must choose a simplified mathematical model, which is quite accessible for analytical research and at the same time preserves the most characteristic features of the initial object.
For the construction of simplified mathematical models of the parachutist movement, analysis, determination, and systematization of the permanent and temporal parameters are carried out.
There are no regular and sufficiently substantiated methods for constructing nonlinear mathematical models at the present time; however, for solving particular problems, with the correct composition of the initial systems of nonlinear differential equations, numerical methods for their solution can give quite adequate results.
https://www.fxyz.ru/formulas_to_physics /mechanics /aerostatics /atmospheric_pressure /
Gerasimenko I.A. Airborne training: Textbook. Moscow: Military Publishing, 1986. Part 1. P. 32.