Vladimir S. Syromiatnikov Spacecraft Docing Devices deom SSI

where The maximum initial velocity and deformation is usually found by calculating the direct impact with roll (see section 5.4.6. paragraph 3). In the general case, the rotations are accompanied by shock absorption of the lateral impact. Since in a real construction the same shock absorbers work, combined solution of equations like (5.20) is needed to determine their maximum course and energy capacity. Shock absorption of pitch and yaw rotations, analogous to those examined for “rod and cone” docking devices, can be studied independent of the work of other shock absorbers. The low frequency angular oscillations of the bodies relative to the transverse axes are described by the same equations (5.39). The required energy capacity of the angular shock absorbers can be approximately determined from the formula where l0 is defined by expression (5.28). The value of this energy may be significant (see Table 5.1). On the other hand, the characteristics of the angular shock absorbers, which were calculated in the analysis of an impact of the rings with the requirement of insuring linkage, turn out to be too “soft” and are ineffective to absorb the shock of rotation. The 1 introduction of constant damping, as indicated, is harmful before linkage, when the angular velocity of the ring may reach 25-30 degrees/s; in rotation after linkage, with maximum velocities not exceeding 2-3 degrees/s, this damping insignificantly increases the energy capacity of the shock absorbers. Thus, the contradiction in the requirements on the shock absorbers in angular (in pitch and yaw) displacements of the ring are more clearly manifested in peripheral docking devices than in “rod and cone” ones. The problem can be solved in a number of ways.

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