Moog Provides Hardware for ATV-5 Georges Lemaître
29 July 2014
ATV-5 heads toward the ISS on a resupply mission
Moog Inc. (NYSE: MOG.A and MOG.B) Space and Defense Group provided hardware to Thales Alenia Space in support of Automated Transfer Vehicle 5 (ATV-5) Georges Lemaître, designed and built by Airbus Defence and Space as prime contractor,that launched on July 29, 2014 from ELA-3, Kourou, French Guiana atop an Ariane 5 launch vehicle built by Airbus Defence and Space and operated by Arianespace. Georges Lemaître is the fifth ESA-built ATV; thirty companies from ten European countries, as well as eight other companies from Russia and the United States, work under the supervision of Airbus Defence and Space, the world’s second largest space company.
The International Space Station (ISS) depends on regular deliveries of experiment equipment and spare parts, as well as food, air and water for its permanent crew. ATVs are intended to launch every year, carrying 6.6 tons of cargo to the Station, 400 km above Earth.
The Ariane 5 ES, also built by Airbus Defence and Space as prime contractor, is an expendable launch vehicle used to deliver the ATV to the ISS. The Vulcain main engine is equipped with six Moog structural supports, which support the engine during launch. Moog also supplies the propellant valve assemblies (PVA), which control the pressure fed hypergolic upper stage engine. The Moog PVA is a single assembly that controls all functions of the engine, including purging for multiple starts and cooling. Each assembly has a main inlet and outlet for the propellants and GHe for pilot and purging. Electromechanical thrust vector control (EM TVC) actuatorsalso play a key role on the Upper Stage Engine, supporting attitude control after separation of the first stage.
Moog provided a pressure equalization assembly (PEA) which confirms that the cabin pressures of the ISS and of the ATV are equalized when the ATV docks to the station. The PEA also monitors the internal cabin pressure inside the pressurized compartment of the ATV. In addition, Moog also supplied the cabin fan assembly.
Critical propulsion components were also supplied by Moog, including thruster valves, pressure transducers and non-return valves. Pressure transducers are used for pressure gauging in various subsystems and consist of a pressure-sensing element and a dedicated set of electronics, integrated into one compact design. Non-return valves are required to prevent back flow and mixture of fuel (MMH) and oxidizer (NTO) liquid or vapor from the propellant tanks to the helium pressurization system.
ATV-5 is named after Belgian scientist Georges Lemaître; this continues the tradition of drawing on great European visionaries to reflect Europe’s deep roots in science, technology and culture. After launch, ATV automatically navigates to a precision docking with the Station’s Russian Zvezda module. It remains attached to the ISS for up to six months before reentering the atmosphere and deliberately burning up together with several tons of Station waste.
Moog Inc. is a worldwide designer, manufacturer, and integrator of precision control components and systems. Moog’s high-performance systems control military and commercial aircraft, satellites and space vehicles, launch vehicles, missiles, automated industrial machinery, wind energy, marine and medical equipment. Additional information about the company can be found at www.moog.com. Additional information about Moog’s Space Sector can be found at www.moog.com/space.