where are the current and initial length of the tracking drive; are the coefficients of amplification in position and velocity. The velocity of change of the radius vector between the hinges of drive is found as the sum of two vectors where is the vector from the center of the platform to the hinge of the drive. The length of the drive is found through its components in system of coordinates 1 and the velocity of its change is equal to The computer of the complex test unit, in which the APDAs of the Soyuz and Apollo spacecraft were tested consisted of an analog computer and a digital differential analyzer which solved (to increase modeling accuracy) the equations of rotational motion. The total error in reproducing the parameters of the process was estimated at 5%. One of the possible means of increasing accuracy is the use of a digital computer to carry out all computations; however, this requires the use of high-speed computers. 7.8. Dynamic Test Units to Test Shock Absorbers To test shock absorbers one needs test units with a simpler principal scheme and a simple method of conducting the work. These test units can be divided into
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