WHOLE-SPACECRAFT PASSIVE LAUNCH ISOLATION

A spacecraft is subjected to very large dynamic forces from its launch vehicle during its ascent into orbit. These large forces place string ent design requirements on the spacecraft and its components to ensure that the trip to orbit will be survived. The severe launch environmen t accounts for much of the expense of designing, qualifying, and testi ng satellite components, Reduction of launch loads would allow more se nsitive equipment to be included in missions, reduce risk of equipment or component failure, and possibly allow the mass of the spacecraft b us to be reduced. These benefits apply to military as well as commerci al satellites. The design and testing is reported of a prototype whole -spacecraft isolation system that will replace current payload attach fittings, is passive only in nature, and provides lateral isolation to a spacecraft that is mounted on it. This isolation system is being de signed for a medium launch vehicle and a 3000-kg (6600-lb) spacecraft, but the isolation technology is applicable to practically all launch vehicles and spacecraft, small and large. The isolator significantly r educes the launch loads seen by the spacecraft.