Figure 3.4. Dependences of force, momenta, and displacements in the lock (Soyuz APDA). a. dependence of force on the deformation of the passive clamp; b. the same for the active clamp; c. diagram of the force, momenta, displacements, and angles of rotation of the eccentric shaft; 1. maximum values; 2. minimum values; 3. kN; 4. drawing of the torque on the shaft of the drive; 5.; 6. characteristic of seal during compression; 7. maximum protrusion of seal; 8. beginning of deformation of latches in a nonplanar joint- 1mm; 9. entry of clamps into linkage. where is the eccentricity of the lock shaft; is the radius of the pulley; is the forces on the clamp of the lock (Figure 3.4) when the eccentric rotates by an angle at which maximum momentum is reached on the pulley; is the durability resource of the cable; is the resource of force developed by the drive; is the ratio of the maximum force of the drive to the minimum (coefficient of force scatter). In order to have the minimum size and mass of the structure, small values of the resource coefficients and a drive is chosen with the minimum scatter of developed force . To calculate the maximum tightening
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