of the main methods is debugging and verification of actions when individual failures arise, or when there are deviations in operation (irregular situations). 7.5. Types of Test Equipment To reproduce the real process of operation of the docking device in Earth conditions during debugging and control verification, universal testing equipment is used, as well as special simple and complex test units. The test units reproduce the process of docking, the operation of shock absorbers, drives, and other elements of the docking mechanism and monitor their functioning. The greatest problem is the reproduction on Earth of the movement and interaction of spacecraft during docking in weightlessness. Thus, great attention is devoted to dynamic test units. In addition to dynamic test units to test docking devices, various other types of test units are created which perform static testing, verify the operation of assemblies, and measure their characteristics. Verification is done in thermal vacuum chambers and other units. Aids have been created which facilitate servicing and verification of assemblies as part of the spacecraft. 7.6. Goals of Dynamic Testing. Types of Test Units The goals of testing in dynamic test units are verification of the shock absorption system and reproduction of the docking process as a whole. In both types of testing it is expedient to reproduce extreme ambient conditions which affect the characteristics of the shock absorbers. This primarily includes increases and decreases in temperature, and partial vacuum. Tn accordance with the two main goals, testing is divided into comprehensive dynamic testing and verification of the shock absorption system and individual shock absorbers. Verification of the shock absorbers is done on dynamic test units, and the reproduction of the docking process on comprehensive dynamic test units (Table 7.2).
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