December 16, 2013

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Article

ATK and NASA Complete Tests on SLS Rocket Boosters

Press Release

December 16, 2013

Promontory — NASA and ATK have completed two key avionics tests for the solid rocket boosters for the space agency's new heavy lift rocket, the Space Launch System (SLS), being constructed to embark on missions to explore deep space.

The avionics tests, called hot fires, operate the booster's thrust vector control (TVC) system as if the booster were actually launching the SLS on a mission. The tests were conducted at ATK's Promontory, Utah.

The new avionics system is a critical aspect of the twin SLS boosters, providing power distribution, communication with the flight computers, booster ignition, command and control of the booster steering system and booster staging. The tests simulated SLS launch sequences both in preflight checks and in an ascent profile by verifying communication between ground and flight systems, starting motor ignition and moving the TVC system. The successful testing validated the new SLS booster avionics subsystem and electronic support equipment (ESE).

Training and evaluating the test team was an additional component of the test as team members were subjected to a variety of atypical conditions during simulated countdowns and firings. People, processes and tools were evaluated to strengthen and enhance performance at launch.

"Knowledge transfer is one of the most critical aspects of the avionics test and one of the most rewarding," said Charlie Precourt, vice president and general manager of ATK's Space Launch division.

Other test objectives included validating the new electronic support equipment that replaced heritage ground equipment. Much of the equipment replaced was designed and built during the mid- to late-1970s and was successfully used on all 53 of the Space Shuttle Reusable Solid Rocket Motor and three 5-segment development motors static motor firings. The equipment demonstrated in these tests reduces cost and increases reliability of the booster system.

ATK developed the avionics subsystem and ESE at its facilities in Clearfield and Magna, Utah, with support from NASA Marshall Space Flight Center in Alabama. 

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