the verification of the execution of basic functions, electrical parameters, force and durability characteristics, and vibration resistance. In the testing of docking devices attention should be devoted to functioning in the interaction of individual mechanisms, considering deformations (including during cooling). Testing of assemblies with the reproduction of extreme conditions is expediently done in thermal vacuum chambers, since this avoids the condensation of moisture and simplifies verification of hermeticity. Tn order to confidently determine the limits of work capacity of docking devices in extreme conditions it is expedient for the construction to experience these effects in a wider range than the technical requirements. This is primarily applicable to the most critical parameters, such as decreased temperature and initial approach velocities. 7.4. Content and Volume of Testing Three types of autonomous testing are included in the following basic groups, that is, testing of 1) preservation of work capacity after a cycle of Earth preparation (transportation, storage, partial use of resources, etc.); 2) preservation of work capacity after the active part of the flight on a rocket booster (vibrations, overloads, etc.); 3) correctness of the execution of the electrical circuits and their quality; 4) execution of specific operations; 5) stability and work capacity in space conditions (vacuum, radiation, weightlessness, heating and cooling); 6) hermeticity (for hermetic docking devices). 7.4.1. Acceptance and Control Testing This testing includes verification of the effect of individual manufacturing or assembly (tolerances, regulation, correctness and quality of assembly and soldering, durability of screw locking devices, etc.). This testing verifies: 1) vibration overloads (verifies the durability of attachment, screw locking, soldering, etc.); 2) electrical correctness and quality of assembly and insulation (verification of basic parameters considering tolerances and regulation, interaction, electrical assembly, required currents, length of operations, etc.); 4) work in extreme
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