Figure 3.3. Geometric correlation in the locks of the docking frame, a. tightened position; b. linked position. the plane of the joint considering the tolerances equal to the maximum gap in the joint. The value of this gap is the sum of the height of the seal and the possible nonplanar nature of the joint Consequently, it is necessary to satisfy the following inequality: The value of the loads and lock parameters of the docking frame for some docking devices are given in Table 3.1. Analysis of this data shows that loads on the joint rise from project to project, which is explained by the increase in the mass and size of the spacecraft, as well as more complex flight programs. At the same time, size and mass limitations do not permit one to substantially increase the number of locks; this requires efficient planning, increasing the force of tightening and increasing durability, as well as increasing the urgency of measures to insure the closure of the joint. 3.3.2. Construction of the Lock System Most widespread are docking frame locks with a single drive and a closed cable connection. The number of required locks depends on the diameter and
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