Abstract:
An automatic monitoring system for alarm circuits used on board aircraft including a uniselector which successively energizes the alarm circuits, each comprising a plurality of parallel-connected alarm devices. Owing to detector means associated to each alarm device and one AND - gate collecting signals from the detectors, simultaneous operation of the alarm devices associated with one alarm circuit is checked and the monitoring proceeds.
Abstract:
PCT No. PCT/FR88/00002 Sec. 371 Date Aug. 12, 1988 Sec. 102(e) Date Aug. 12, 1988 PCT Filed Jan. 4, 1988 PCT Pub. No. WO88/05162 PCT Pub. Date Jul. 14, 1988.Method and system for determining the longitudinal position of the gravity center of an aircraft provided with an adjustable stabilizer. At a point of flight for which the aircraft is in equilibrium with its elevator in aerodynamic prolongation of the adjustable stabilizer and when the gravity center is at the vicinity of the focus of the aircraft, the gravity center position is calculated from: the position (XF) of the focus (F) of the aircraft, the measurement of the deflection (iH) of the adjustable stabilizer, a first function K(M, N1) of the engine speed (N1) of the engines of the aircraft and the Mach number (M); and a second function of such Mach number. There is application to the monitoring of the gravity center of a flying aircraft.
Abstract:
Method and system for monitoring cracks liable to appear and/or to grow in one point of a loaded structure. According to the invention, a theoretical increase of the length of the crack is cumulatively calculated, as and when the stresses are exerted, from said initial length, so as to determine an instant theoretical crack length; said instant theoretical length is permanently compared to said maximum acceptable length, and said point is inspected as soon as said instant theoretical length reaches said maximum acceptable length.
Abstract:
Method and system for monitoring cracks liable to appear and/or to grow in one point of a loaded structure. According to the invention, a theoretical increase of the length of the crack is cumulatively calculated, as and when the stresses are exerted, from said initial length, so as to determine an instant theoretical crack length; said instant theoretical length is permanently compared to said maximum acceptable length, and said point is inspected as soon as said instant theoretical length reaches said maximum acceptable length.
Abstract:
Method and system for monitoring cracks liable to appear and/or to grow in one point of a loaded structure. According to the invention, a theoretical increase of the length of the crack is cumulatively calculated, as and when the stresses are exerted, from said initial length, so as to determine an instant theoretical crack length; said instant theoretical length is permanently compared to said maximum acceptable length, and said point is inspected as soon as said instant theoretical length reaches said maximum acceptable length.
Abstract:
PCT No. PCT/FR88/00002 Sec. 371 Date Aug. 12, 1988 Sec. 102(e) Date Aug. 12, 1988 PCT Filed Jan. 4, 1988 PCT Pub. No. WO88/05162 PCT Pub. Date Jul. 14, 1988.Method and system for determining the longitudinal position of the gravity center of an aircraft provided with an adjustable stabilizer. At a point of flight for which the aircraft is in equilibrium with its elevator in aerodynamic prolongation of the adjustable stabilizer and when the gravity center is at the vicinity of the focus of the aircraft, the gravity center position is calculated from: the position (XF) of the focus (F) of the aircraft, the measurement of the deflection (iH) of the adjustable stabilizer, a first function K(M, N1) of the engine speed (N1) of the engines of the aircraft and the Mach number (M); and a second function of such Mach number. There is application to the monitoring of the gravity center of a flying aircraft.
Abstract:
PCT No. PCT/FR88/00002 Sec. 371 Date Aug. 12, 1988 Sec. 102(e) Date Aug. 12, 1988 PCT Filed Jan. 4, 1988 PCT Pub. No. WO88/05162 PCT Pub. Date Jul. 14, 1988.Method and system for determining the longitudinal position of the gravity center of an aircraft provided with an adjustable stabilizer. At a point of flight for which the aircraft is in equilibrium with its elevator in aerodynamic prolongation of the adjustable stabilizer and when the gravity center is at the vicinity of the focus of the aircraft, the gravity center position is calculated from: the position (XF) of the focus (F) of the aircraft, the measurement of the deflection (iH) of the adjustable stabilizer, a first function K(M, N1) of the engine speed (N1) of the engines of the aircraft and the Mach number (M); and a second function of such Mach number. There is application to the monitoring of the gravity center of a flying aircraft.
Abstract:
Un système de surveillance de la fatigue d'éléments de structure soumis à des contraintes, permettant de contrôler l'apparition et la propagation de fissures dans des structures fortement sollicitées, notamment la peau d'un aéronef. Ce système permet l'utilisation de capteurs non destructifs de contrôle de fissures, du type jauges de contrainte, qui soient robustes et fiables, tout en ne nécessitant aucune intervention humaine particulière. Le système serait intégré à un calculateur électronique.