pairs of disks; when n is further increased the mobility of the disks in the package is disrupted. The value of the applied mass of moving parts of the brake is usually small for example, for the Soyuz-Salyut docking mechanism = 0.7 kg, which is 1.5% of the total mass of moving parts of the docking mechanism. The brake can work in vacuum at temperatures from —50 to +60*C, and maintains good characteristic stability. The most critical failure of the self-regulating friction brake is a shaft breakdown. 6.4. Electromechanical Damping Electromechanical damping provides a force proportional to the velocity of deformation of the shock absorbers, which makes it possible to obtain favorable characteristics for the docking device (coefficient of recovery and filling, small contact forces). The electromechanical brakes of the electromagnetic brake have a good compatibility with the general scheme of electromechanical docking mechanisms. At the same time, as experience has shown, the use of electromechanical damping requires careful and reasonable design, and detailed calculation of the electromagnetic brake and damper as a whole. 6.4.1. Damping by Brakes with Permanent Magnets Up until now, docking devices have used electromagnetic (or more accurately, magnetoelectric) brakes. The brake is an electric machine. At the terminal gap of the brake stator, which is formed from permanent magnets, rotates a full rotor (Figure 6.7). This construction provides low inertia and efficiency in the other characteristics of the brake. The brake with permanent magnets is very simple in construction, does not require control or an external source of energy and is reliable. The principle of action of the electromechanical brake is based on the interaction of the resulting magnetic field in the gap with eddy currents induced in
RkJQdWJsaXNoZXIy MTU5NjU0Mg==