Abstract: A communication system adapted for a vehicle includes a network for communication between at least two communication interfaces respectively connected to a first controller which manages/runs a control application and a second controller which also manages/runs the control application. The communication interfaces have, per controller, at least one communication port from which a communication link is possible. The communication link is a PLC (Power Line Communication) link having at least two electrically conductive links connected to each of the respective communication ports through at least one coupling transformer, for a control application transmission between the two communication interfaces.

Abstract: A ship hull includes at least one float (10) and a center of buoyancy (CB) situated behind the center of flotation. (CF), the distance between the center of buoyancy and center of flotation is greater by 5% than the waterline length L of the hull.

Abstract: A secure system has two computers that are intrinsically safe and implements a method for verifying the redundancy for the outputs where a very high level of safety is required. The method makes it possible to handle inconsistencies in the outputs of the two computers when they are working in redundant mode. Each computer receives the output states determined by the other computer and compares them to states calculated. A state of divergent operation is detected if the computers have determined two different states for a single output. If a divergence is detected for at least one output, the state of that output is determined by preventing any transition from a restrictive state to a permissive state.

Abstract: A communication system adapted for a vehicle includes a network for communication between at least two communication interfaces respectively connected to a first controller which manages/runs a control application and a second controller which also manages/runs the control application. The communication interfaces have, per controller, at least one communication port from which a communication link is possible. The communication link is a PLC (Power Line Communication) link having at least two electrically conductive links connected to each of the respective communication ports through at least one coupling transformer, for a control application transmission between the two communication interfaces.

Abstract: The invention aims to provide a compact device for despatching a command. For this purpose, the invention proposes a novel type of output stage. A secure verification device of the despatching of a binary command signal from at least one conductor has an input terminal and an output terminal. Means of insertion despatch a verification message on said conductor. At least one optical coupler has an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.

Abstract: A ship hull includes at least one float (10) and a centre of buoyancy (CB) situated behind the centre of flotation (CF), the distance between the centre of buoyancy and centre of flotation is greater by 5% than the waterline length L of the hull.

Abstract: A secure system has two computers that are intrinsically safe and implements a method for verifying the redundancy for the outputs where a very high level of safety is required. The method makes it possible to handle inconsistencies in the outputs of the two computers when they are working in redundant mode. Each computer receives the output states determined by the other computer and compares them to states calculated. A state of divergent operation is detected if the computers have determined two different states for a single output. If a divergence is detected for at least one output, the state of that output is determined by preventing any transition from a restrictive state to a permissive state.

Abstract: The invention aims to provide a compact device for despatching a command. For this purpose, the invention proposes a novel type of output stage. A secure verification device of the despatching of a binary command signal from at least one conductor has an input terminal and an output terminal. Means of insertion despatch a verification message on said conductor. At least one optical coupler has an emission diode coupled to the conductor so as to copy the verification message when the binary signal is in a first state and not to copy it when it is in a second state different from the first state.

Abstract: A logic AND circuit comprises, in a cascade arrangement, a threshold oscillator having a power supply input connected to a first circuit input and a clamping amplifier providing an output signal only when simultaneously the voltage on a second circuit input exceeds a threshold and the threshold oscillator delivers an output signal. The oscillator comprises a single transistor whose emitter and collector circuits contain two primary windings of a transformer whose secondary winding constitutes a tuned circuit in association with a four-lead capacitor and whose base is biased from the first input via a filter cell having a parallel-connected four-lead capacitor.