Abstract: A method for processing a signal on board an aircraft. An electronic control unit receives an input signal including useful data in a first passband, implements a first operation of bandpass filtering the input signal with a first passband to obtain a useful signal containing the useful data, with detection of interference caused by a lightning strike. The electronic control unit implements a second operation of bandpass filtering the input signal to obtain a detection signal, the bandpass filter having a second passband that is distinct from the first passband, comparing a detection value derived from the detection signal with a detection threshold, and correcting the exploitation of the useful data if exceeded.

Abstract: A method for processing a signal on board an aircraft. An electronic control unit receives an input signal including useful data in a first passband, implements a first operation of bandpass filtering the input signal with a first passband to obtain a useful signal containing the useful data, with detection of interference caused by a lightning strike. The electronic control unit implements a second operation of bandpass filtering the input signal to obtain a detection signal, the bandpass filter having a second passband that is distinct from the first passband, comparing a detection value derived from the detection signal with a detection threshold, and correcting the exploitation of the useful data if exceeded.

Abstract: A method of transmitting data between an electronic transmitter device and an electronic receiver device connected together by a data link, the method comprising the steps of: sending the data in the form of at least three identical frames sent in succession and each associated with respective checkdata calculated on the frame in question; and the electronic receiver device verifying the validity of the received frames as they are being received and making the first valid frame available for processing while ignoring the others.

Abstract: A device for the differential acquisition of current includes an acquisition circuit including a charge amplifier connected, at the input, to terminals for connection to a signal emitting component, and at the output, to an integrator. A unit for injecting a charge signal is mounted between the terminals and the charge amplifier and is connected to a control unit connected to an output of the acquisition circuit. The control unit is so arranged as to control the injection of a charge signal, to detect a resultant signal at the output of the acquisition circuit and to compare the resultant signal with the injected signal. A method includes controlling such a device.

Abstract: A method of transmitting data between an electronic transmitter device and an electronic receiver device connected together by a data link, the method comprising the steps of: sending the data in the form of at least three identical frames sent in succession and each associated with respective checkdata calculated on the frame in question; and the electronic receiver device verifying the validity of the received frames as they are being received and making the first valid frame available for processing while ignoring the others.

Abstract: Device for the differential acquisition of current, comprising an acquisition circuit comprising a charge amplifier connected, at the input, to terminals for connection to a signal emitting component, and at the output, to an integrator, characterized in that a unit for injecting a charge signal is mounted between the terminals and the charge amplifier and is connected to a control unit connected to an output of the acquisition circuit, the control unit is so arranged as to control the injection of a charge signal, to detect a resultant signal at the output of the acquisition circuit and to compare the resultant signal with the injected signal.

Abstract: A method of detecting a fault of a switching electricity source having a control stage responsive to a setpoint signal to deliver a control signal that is modulated with a predetermined duty ratio (?) to a power stage that is to deliver electricity to a load. The method includes the steps of: determining at least one nominal value (?min, ?max) for the duty ratio for normal operation, and at least one fault threshold (?SC, ?OC) as a function of the nominal value; determining at least one instantaneous value (?) of the duty ratio of the signal issued by the control stage; and comparing the instantaneous value with the fault threshold. A detection circuit implementing the method is also provided.

Abstract: A method of detecting a fault of a frequency sensor having a bias resistor and associated with a rotary member. The following steps are performed while the rotary member is stationary: injecting into the bias resistor of the sensor inverted alternating signals (S1, S2) comprising at least one first alternation (A1) and at least one second alternation (A2), the first alternation being of amplitude greater than the amplitude of the second alternation; and detecting a frequency of an output signal (S?) from the sensor. A measurement circuit implementing the method is also provided.

Abstract: A circuit for exciting at least one DC sensor is provided in which the circuit has a digital regulation controller connected to a main system and to a regulation loop. The main system has a DAC connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode. The regulation system includes an ADC connected to the amplified paths. The circuit includes a monitoring system that is connected to the controller in parallel with the converter in order to send signals as a function of an AC component of the signals taken from the amplified paths. The digital controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.

Abstract: A method of detecting a short circuit affecting a sensor, at least one terminal of the sensor being connected to a bias resistor, includes: applying to at least one bias resistor at least one test bias voltage having at least one predefined characteristic that is different from a corresponding characteristic of a nominal bias voltage of the resistor; measuring a resulting differential voltage across the terminals of the sensor; and as a function of at least one characteristic of the measured differential voltage corresponding to the predefined characteristic of the test bias voltages, determining whether the sensor presents a short circuit.

Abstract: A method for correcting measurement of a voltage across output terminals of a sensor, the sensor configured to be assimilated with an assembly including a generator and a series resistance, each of the output terminals being respectively connected to a pull up/down resistor. The method includes: evaluating the series resistance of the sensor, including measuring first and second voltages across the output terminals when first and second bias voltages are applied on each pull up/down resistor; evaluating the series resistance from the first and second voltages; and correcting, from the series resistance, a voltage measured across the output terminals of the sensor to infer therefrom a corresponding voltage generated by the generator.

Abstract: A method of detecting a short circuit affecting a sensor, at least one terminal of the sensor being connected to a bias resistor, includes: applying to at least one bias resistor at least one test bias voltage having at least one predefined characteristic that is different from a corresponding characteristic of a nominal bias voltage of the resistor; measuring a resulting differential voltage across the terminals of the sensor; and as a function of at least one characteristic of the measured differential voltage corresponding to the predefined characteristic of the test bias voltages, determining whether the sensor presents a short circuit.

Abstract: A method for correcting measurement of a voltage across output terminals of a sensor, the sensor configured to be assimilated with an assembly including a generator and a series resistance, each of the output terminals being respectively connected to a pull up/down resistor. The method includes: evaluating the series resistance of the sensor, including measuring first and second voltages across the output terminals when first and second bias voltages are applied on each pull up/down resistor; evaluating the series resistance from the first and second voltages; and correcting, from the series resistance, a voltage measured across the output terminals of the sensor to infer therefrom a corresponding voltage generated by the generator.

Abstract: A method of detecting a fault of a switching electricity source having a control stage responsive to a setpoint signal to deliver a control signal that is modulated with a predetermined duty ratio (?) to a power stage that is to deliver electricity to a load. The method includes the steps of: determining at least one nominal value (?min, ?max) for the duty ratio for normal operation, and at least one fault threshold (?SC, ?OC) as a function of the nominal value; determining at least one instantaneous value (?) of the duty ratio of the signal issued by the control stage; and comparing the instantaneous value with the fault threshold. A detection circuit implementing the method is also provided.

Abstract: A method of detecting a fault of a frequency sensor having a bias resistor and associated with a rotary member. The following steps are performed while the rotary member is stationary: injecting into the bias resistor of the sensor inverted alternating signals (S1, S2) comprising at least one first alternation (A1) and at least one second alternation (A2), the first alternation being of amplitude greater than the amplitude of the second alternation; and detecting a frequency of an output signal (S?) from the sensor. A measurement circuit implementing the method is also provided.

Abstract: A circuit for exciting at least one DC sensor is provided in which the circuit has a digital regulation controller connected to a main system and to a regulation loop. The main system has a DAC connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode. The regulation system includes an ADC connected to the amplified paths. The circuit includes a monitoring system that is connected to the controller in parallel with the converter in order to send signals as a function of an AC component of the signals taken from the amplified paths. The digital controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.