Figure 1.29. Elements of the docking mechanism drive with the cable system of the APDA (Apollo), a. drive of the docking mechanism; b. cross section; 1. guide rollers; 2. centering socket; 3. centering rod of the ring; 4. compensating spring; 5. drive; 6. drum; 7. cable connection; 8. ring (in retracted state); 9. hull of the APDA. retracted position (in the passive state of the APDA) is provided by centering conical rods and sockets. The mechanism is equipped with three terminal switches installed in the upper hinges of the shock absorbers. The APDA uses a redundant alternating current drive. During retraction of the ring the drive must overcome the force of the shock absorbers, which is created by the springs and dampers. The schematic of the latches of the ring is similar to that described above. To disengage the latches, sequential electromagnets are used (see Figure 1.25). Two doubling magnets installed in each of the three pairs of latches operate on a general lever mechanism, releasing the latches in each pair. To disengage in the
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