Safran Electronics & Defense

Safran Helicopter Engines

Sagem Defense Securite

Celine Liu

Nicolas Marti

Stephen Langford

Nicolas Charrier

A flight control system of an aircraft including a first processing unit, a second processing unit, communication means configured to establish a first two-way digital link and as second two-way digital link between the first processing unit and the second processing unit. The second link is redundant with the first link, and the first link and second link are likely to be active concomitantly. The system further includes backup communication means enabling data exchanges between the first processing unit and the second processing unit in the case of a failure in the first link and second link. The backup communication means includes an array of sensors or actuators and/or a secure onboard network for the avionics.

Two-way architecture with redundant CCDL's

The present invention concerns a method for switching, by a local processing unit () of a flight control system of an aircraft, configured to control at least one local actuator, connected to at least one local sensor and connected via at least one link () to an opposite processing unit () configured to control at least one opposite actuator and be connected to at least one opposite sensor, said local processing unit () being further configured to be connected to backup communication means () enabling data exchanges between the local processing unit () and the opposite processing unit () in the case of failures of the links connecting same (), said backup communication means comprising an array of sensors or actuators () and/or a secure onboard network for the avionics (), comprising steps of: &#x2022;&#x2014;sending, to the opposite processing unit (), acquisition data relative to the at least one local sensor and actuator data relative to the at least one local actuator, &#x2022;&#x2014;receiving, from the opposite processing unit (), acquisition data relative to the at least one opposite sensor and actuator data relative to the at least one opposite actuator, &#x2022;&#x2014;receiving an item of opposite health data and determining an item of local health data, &#x2022;&#x2014;switching said local processing unit () from a first state to a second state chosen from an active state (), a passive state () and a slave state (), depending on the opposite health data received and the local health data determined.

Two-way architecture

The invention concerns a bandwidth control method in an on-chip system comprising at least one main master module, at least one secondary master module, at least one slave module and a bus connected to each module on a communication link, the bus comprising interconnection means to make at least one common slave module communicate with at least one main master module and with at least one secondary master module via at least one common path portion, the method comprising the following steps carried out for each common slave module: first detection of a first request to access the common slave module, issued by a main master module, definition of a blocking time Dj associated with the common slave module, blocking, during blocking time Dj, of any data transfer on the at least one common path portion between a secondary master module and the common slave module.

Growing community of inventors

Boulogne-Billancourt, France

Celine Liu