scheme. In testing on a horizontal test unit this error does not usually exceed 10% for changes in in a range of ±15*. For a more accurate reproduction of the main parameters m3 and in principle it is possible to readjust the test unit by changing and in testing at different angles. From the first formula (7.3) it follows that testing of the central impact is done without readjustment of the test unit Reproduction of the relative trajectories makes it possible to experimentally determine the coefficient of recovery by recording the trajectories of motion of the head before impact with the inclined plane and after impact (Figure 7.15) using a formula obtained from expression (4.11) where and arc the initial and final angles of the slope of the trajectory. The method of this testing is rather simple, thus it is usually included in control testing of the docking mechanism. Figure 7.15. Reproduction of the relative trajectories in impacts with the inclined plane in the horizontal test unit with a rocking load. 1. inclined plane; 2. portion of slippage; 3. trajectory of motion of the head after impact ( = 0.5 kN/(m/s); 4. the same for = 3.5 kN/(m/s); 5. trajectory of motion of the head before impact.
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