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On-board systems are complex assemblies, confined and mobile with different applications: trains, satellites, ships, aircraft, but oil wells too.
On-board systems are characterized by the constraints they undergo that are caused by their carrier and its environment: the shock when two stages of a launcher separate, the vibrations caused by a vehicle, the temperature and humidity encountered by rail equipment. The lack of space for equipment forming an on-board system generates extra constraints: Thermal dissipation of an electrical component, electromagnetic compatibility and particle cleanliness needed close to lenses. More frequently than not, other factors can be added to these constraints: requirements for optimizing volume and weight that entail the use of special materials and procedures.
Whether it be for static elements (housings, electronics, video cameras, structural elements) or for dynamic elements (bearings, actuators, pyrotechnic valves), in its design and build panel, ALCEN possesses resources for making equipment compatible with all these difficult environments. It takes account of induced environmental constraints in equipment: dimensions of linkage subject to vibration, use of alloys that can resist extreme temperatures, or barrier seals for protection against corrosive environments. It also provides protection systems for the most fragile equipment: armoring for electronics subjected to intense electromagnetic fields, suspensions and vibration/shock absorbers for protecting optronic assemblies and passive or active cooling systems for components in hot environments.
All ALCEN’s resources bring a decisive advantage when a given item of equipment needs to be incorporated into an on-board system, even if, a priori, the item in question does not seem to be compatible with its associated environments and constraints. ALCEN often accompanies its products with a theoretical demonstration (linked to the definition of the product) and/or a practical demonstration (linked to the manufacture of the product) of reliability levels, as well as a demonstration of service life, by using APASE methods. It also takes account of maintenance operations.