performed by a spring force usually not exceeding 100 N. Tt is also possible to create latches which prevent jamming along the course of compression by introducing additional moving or disruptive elements. Linkage may be prevented by lack of compression of the working elements of the sensors, for example, when their plungers jam. It is expedient to provide for their compression by installation on an elastic or destructible element. In construction one should create sufficiently stable (durable and rigid) elements (primarily the ring with guides), the deformation of which may cause disengagement. 9. Nonalignment of the joint may be caused by a lack of compression or elements on the docking frames not engaging. Thus, the plungers are equipped with additional duplicate guides. Electrical connectors which recess when there is no docking do not prevent coupling. Other elements (sensors, hydraulic connections, etc.) are also expediently installed on compressible or destructible elements. The entry of guide rods into sockets is usually necessary to equalize and contract the frames, thus, their construction should be as simple as possible and be able to compensate Tor possible distortions of the geometry. 10. Seals which insure the hermeticity of the joint are usually duplicated. The back-up set of locks of the docking frame, in the case of lack of hermeticity, can be used to increase the force of seal compression. It is expedient to have additional hermetization equipment on board. 11. One should use redundancy in the drives by using gears and other types of differentials, which exclude failures when engines and other quickly rotating elements break down, such as gears, bearings, etc. This prevents the failure of a drive due to jamming, breakdown, or disruption of the supply circuit of the electrical engines or commutating elements. Tn the latter case it is necessary to cut off the part of the reducer that is not working. Usually cut-off couplings are used. This construction also simplifies duplication of the electrical circuits of supply and control. 12. Where possible it is expedient to use manual operations to duplicate the work of mechanisms and their inspection. For example, opening and hermetization of the hatches may be done using drives or manually; these operations may be done from inside the spacecraft or in the tunnel. Moreover, reliability of performance is
RkJQdWJsaXNoZXIy MTU5NjU0Mg==