2.2 Testing and Qualification The qualification was demonstrated by conducting elaborate test runs in component level, system level and finally in spacecraft level. 2.2.1 Functional Tests The deployment of the solar array was tested in a zero-g rig incorporating gravity compensation device, for measurement of critical parameters of latchup shock, final angular velocity and deployment time scatter. The test method was based on the principle that if the hinge axes were aligned vertically plane motions were aligned horizontally and zero friction was imparted at plane motion, then zero gravity simulation and measurement accuracy would be optimum. The rigid fixture in the rig (Fig. 3) which ensured all the alignments and the set of clustered air bearing pads moving on a precision granite table provided the zero-g compensation.
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