Abstract: The present invention relates to a device making it possible to turn on a sub-assembly of an electrical item of equipment hosted in a bigger system, which, if turned on unchecked, may impair the operation of the other items of equipment of the system. An embodiment includes three make/break switches in series in the power supply line and a control of the opening or closing of these make/break switches. Two of the make/break switches are controlled by two independent discrete state indicators, to determine whether the power supply of the sub-assembly of the item of equipment may be energized without undue risk to other equipment of the system. The third make/break switch is controlled by a validation command based on the two discretes, actuating the third make/break switch only if the discretes are in the desired state and if a switching of these discretes has been noted.

Abstract: The invention relates to a data transmission chain for a function of an aircraft onboard facility comprising a first computation chain and a second computation chain executing the same function as the first chain to validate the computation of the first chain, wherein the second computation chain uses the same hardware resources as the first chain and comprises, connected in series, a transformation means for transforming the input data, an acquisition means, the computer, a means for compensating the transformation and the comparison means, in such a way that the second computation chain executes a dissimilar computation from the first computation chain and the transformation compensation means makes it possible to compare the result data of the first and the second computation chain.

Abstract: The technical field of the invention is that of secure display devices. The latter comprise at least one matrix screen, electronics for controlling the screen, a fault-detection circuit and electronic means for managing the display device, the screen consisting of pixels placed in lines and in columns, the lines of pixels being controlled by an electronic “drivers” card comprising electronic means arranged so as to generate a first electronic signal representative of the correct or incorrect operation of the said electronic “drivers” card, the fault-detection circuit arranged so as to generate, from the first signal, a second signal processed by the electronic means for managing the display device.

Abstract: The present invention relates to a device making it possible to turn on a sub-assembly of an electrical item of equipment hosted in a bigger system, which, if turned on unchecked, may impair the operation of the other items of equipment of the system. An embodiment includes three make/break switches in series in the power supply line and a control of the opening or closing of these make/break switches. Two of the make/break switches are controlled by two independent discrete state indicators, to determine whether the power supply of the sub-assembly of the item of equipment may be energized without undue risk to other equipment of the system. The third make/break switch is controlled by a validation command based on the two discretes, actuating the third make/break switch only if the discretes are in the desired state and if a switching of these discretes has been noted.

Abstract: The management process of the invention is in particular intended for the temporal management of an ARINC 629 bus for avionics rigs, and it is characterized in that the rigs to which new information is not available or to which only inconsistent information is available are made to send substituted information (WS(2), WS(3)) furnished with characteristic identifications (S1, S2) at the send instants (TA) which are assigned thereto.

Abstract: A method for producing a result prepared from asynchronous external events, wherein two mutually independent counting processes are activated, the temporal coincidence of the ends of counting of these two processes are verified and, on the basis of the information elements pertaining to the verification of each of these two counting processes and according to a specific sequencing of the application considered, a non-consolidated intermediate action is activated for each of the two sequencing processes and, after the verification of the temporal coincidence of the intermediate actions, and taking account of possible external priority actions, a resultant action is produced if all the necessary conditions are fulfilled.