Patents by Inventor Mohammed El Badaoui

Mohammed El Badaoui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250180436
    Abstract: A method for monitoring the engine speed of a rotating machine, includes constructing a raw spectrogram from a vibratory signal; denoising the spectrogram to obtain an equalised spectrogram, the denoising including a first sub-procedure of determining a foot of the spectrogram, the foot of the spectrum being a set of random harmonic components contained in the raw spectrogram, the first sub-procedure including a first sub-sub-procedure of constructing a regression function robust to the peaks of the spectrogram, the regression function being applied to a logarithm of the spectrogram or to the spectrogram; a second sub-sub-procedure of determining the foot of the spectrum from the regression function; a second sub-procedure of determining the equalised spectrogram from the foot of the spectrogram; separating sources in the equalised spectrogram by determining an estimator of the frequencies of interest; determining an instantaneous speed of rotation of the engine speed from the estimator.
    Type: Application
    Filed: March 27, 2023
    Publication date: June 5, 2025
    Inventors: Yasmine HAWWARI, Dany ABBOUD, Yosra MARNISSI, Mohammed EL BADAOUI, Jérôme ANTONI, Hugo ANDRE
  • Publication number: 20250003833
    Abstract: A method for monitoring a rotary mechanical system of an aircraft including in particular the steps of determining an estimated power spectral density (V) of a noise (v) from a signal (x) representative of vibrations of the rotary mechanical system, determining an equalized power spectral density (Q) by dividing the estimated power spectral density (X) of the signal (x) by the estimated power spectral density (V) of the noise (v), extracting peaks (Qdet) from the equalized power spectral density (Q), and identifying a failure in the rotary mechanical system from the extracted peaks.
    Type: Application
    Filed: October 24, 2022
    Publication date: January 2, 2025
    Inventors: Yasmine HAWWARI, Dany ABBOUD, Yosra MARNISSI, Mohammed EL BADAOUI
  • Patent number: 12140217
    Abstract: A method includes for each of the portions of a guide of the actuator, obtaining an operating signal measured when a movable element of the actuator travels over the guide portion in question, upon each of a plurality of successive activations of the actuator; for each of the guide portions, seeking wear of the actuator from the operating signals obtained for this guide portion; and locating the wear on the guide or on the motor according to the guide portions from which the wear has been found.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: November 12, 2024
    Assignees: SAFRAN, SAFRAN ELECTRONICS & DEFENSE
    Inventors: Amadou Assoumane, Mohammed El Badaoui, Badr Mansouri, Audrey Venon
  • Publication number: 20240361206
    Abstract: A method for detecting a defect in a bearing of a rotating system, includes acquiring a bearing position signal, a vibratory signal from the bearing and a theoretical characteristic vector of the bearing; determining a deterministic part of the vibratory signal and removing the deterministic part to obtain a residual signal function of the position signal; calculating, from the theoretical characteristic vector, lower and upper bounds of defect frequencies; calculating, from the vibratory signal, a spectral coherence and the square of the amplitude of the spectral coherence; calculating, from the square of the amplitude of the spectral coherence and the lower and upper bounds of the defect frequencies, a current characteristic vector of the bearing; determining a spectral cyclic contrast of the defect; finely identifying signatures of interest by calculating a weighted integrated cyclic coherence associated with the defect, and determining diagnostic indicators easily interpretable by an operator.
    Type: Application
    Filed: August 9, 2022
    Publication date: October 31, 2024
    Inventors: Amadou ASSOUMANE, Dany ABBOUD, Mohammed EL BADAOUI, Yosra MARNISSI
  • Publication number: 20240328892
    Abstract: A method for monitoring a turbine engine, said method including, for at least one blade of a rotor with which the turbine engine is equipped, the steps of: obtaining a plurality of samples of at least one analogue time signal acquired by means of at least one fixed proximity sensor and representing a passage of said at least one blade in front of said at least one proximity sensor; calculating a deflection of said at least one blade for each of said samples: determining, in the form of a linear combination of sinusoidal signals, a so-called “approximation signal”, minimizing a cost function evaluating a deviation between said calculated deflections and said approximation signal; and monitoring the vibratory behavior of said at least one blade on the basis of frequencies and/or amplitudes and/or phases of the sinusoidal signals that make up said approximation signal.
    Type: Application
    Filed: June 24, 2022
    Publication date: October 3, 2024
    Applicants: SAFRAN, INSTITUT NATIONAL DES SCIENCES APPLIQUEES DE LYON
    Inventors: Dany ABBOUD, Mohammed EL BADAOUI, Jérôme ANTONI, François GIRARDIN, Fulbert MBAILASSEM
  • Patent number: 12055459
    Abstract: Method for monitoring a turbomachine comprising a stator and a rotor, device, system, aircraft and computer program product. The method comprises a step of acquiring an input signal which represents a deformation of the stator or rotor of the turbomachine. The input signal has been acquired by a deformation gauge which is attached to the stator or rotor. The input signal comprises a first component which represents deformations of the stator or rotor which are caused by rotation of the rotor vanes in relation to the stator, and a second component which represents deformations which are caused by different elements of the rotor vanes. The method comprises a step of re-sampling the input signal in order to obtain a re-sampled input signal comprising a predefined whole number of samples per revolution of the turbomachine rotor.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: August 6, 2024
    Assignees: SAFRAN, SAFRAN AIRCRAFT ENGINES
    Inventors: Dany Abboud, Mohammed El Badaoui, Nicolas Paul Tableau
  • Publication number: 20240253811
    Abstract: A method and a device for detecting a fault in a mechanical system comprising a rotating member and a vibration sensor transmitting a temporal vibration signal. The method comprises processing the temporal vibration signals transmitted over a predetermined period in order to transform the temporal vibration signals firstly into angular vibration signals, then into frequency vibration signals. Next, series of amplitudes are generated, each series being associated with a specific frequency channel and comprising the amplitudes of the frequency vibration signals for this frequency channel. The frequency channels displaying an increasing trend consistent with the fault of interest are then identified. The frequency channels that display an increasing trend are then compared with characteristic frequencies of a known fault of interest in order to check for the possible presence of such a fault in the mechanical system.
    Type: Application
    Filed: December 26, 2023
    Publication date: August 1, 2024
    Applicant: AIRBUS HELICOPTERS
    Inventors: Hervé MOREL, Jérémy JOUVE, Anas HAD, Hugo ANDRE, Mohamed EL BADAOUI
  • Publication number: 20240255380
    Abstract: A method for determining the cyclostationarity of a vibration signal transmitted by a vibration sensor arranged on a mechanical system and allowing a cyclostationarity indicator I? to be calculated. The present disclosure also relates to a method for arranging vibration sensors, using the method for determining cyclostationarity applied to the signals transmitted by these vibration sensors at different positions and orientations. A position of a vibration sensor is validated as a function of this cyclostationarity indicator I?. The present disclosure finally relates to a method for monitoring a mechanical system 10 using the method for determining cyclostationarity to determine the cyclostationarity of the vibration signals relating to the mechanical system before calculating the monitoring indicators of the mechanical system.
    Type: Application
    Filed: December 29, 2023
    Publication date: August 1, 2024
    Applicant: AIRBUS HELICOPTERS
    Inventors: Hervé MOREL, Jérémy JOUVE, Anas HAD, Hugo ANDRE, Mohamed EL BADAOUI
  • Publication number: 20240094089
    Abstract: The invention relates to a method for monitoring the state of mechanical components such as bearings and gears on a shaft line equipping a rotating machine. Said method includes a step of obtaining at least one measurement yc[k] of the absolute acceleration of the shaft, as well as a set of steps of: obtaining a value fr[k] of the rotational frequency of the shaft, determining a matrix H[k] making it possible to define a state model described by: [k+1]=x[k]+w[k]etY[k]=[(y_c [k])¦SE[k]]=H[k]×x[k]+v[k], determining an estimator of the vector x[k] based on data from the state model, said set of steps further including, for at least one mechanical component, steps of: determining, from said estimator, a quantity characteristic of a contribution of said component to the vector Y[k], comparing said quantity with a threshold, detecting a possible defect of said at least one mechanical component.
    Type: Application
    Filed: January 19, 2022
    Publication date: March 21, 2024
    Applicant: SAFRAN
    Inventors: Amadou ASSOUMANE, Dany ABBOUD, Mohammed EL BADAOUI
  • Patent number: 11927501
    Abstract: The invention concerns a method for monitoring a gear system (1) comprising at least two wheels, each wheel having a characteristic frequency (f1, f2), a vibratory or acoustic signal representative of these vibrations having been acquired by a sensor (21), a vibratory or acoustic digital signal x(t) having been obtained, the method comprising, for each characteristic frequency of the system (1), the steps of filtering (E1) the digital signal by means of a filter in such a way as to obtain an image monitoring signal of at least one vibratory component of at least one defect; determining (E3) the square envelope of said monitoring signal, defined by the square absolute value of the Hilbert transform of the monitoring signal so as to extract an image of the modulating signals associated with the rotation of the wheels from the monitoring signal; determining (E4) the synchronous average of said square envelope relative to the period of rotation of a wheel of interest chosen from the wheels of the gear, said avera
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: March 12, 2024
    Assignee: SAFRAN
    Inventors: Dany Abboud, Mohamed El Badaoui, Yosra Marnissi
  • Publication number: 20240026962
    Abstract: A method includes for each of the portions of a guide of the actuator, obtaining an operating signal measured when a movable element of the actuator travels over the guide portion in question, upon each of a plurality of successive activations of the actuator; for each of the guide portions, seeking wear of the actuator from the operating signals obtained for this guide portion; and locating the wear on the guide or on the motor according to the guide portions from which the wear has been found.
    Type: Application
    Filed: December 13, 2021
    Publication date: January 25, 2024
    Inventors: Amadou ASSOUMANE, Mohammed EL BADAOUI, Badr MANSOURI, Audrey VENON
  • Patent number: 11754435
    Abstract: The invention relates to a method (1) for monitoring a rotating machine (100) of an aircraft, wherein a measurement signal is acquired from the rotating machine. According to the invention, instantaneous frequencies (fK(t)) of sinusoidal components of the measurement signal are estimated, and, using a computing module (12), a plurality of successive iterations are carried out in each of which: complex envelopes of the components are updated (C1), parameters of a model of a noise of the signal are updated (C21) on the basis of the envelopes, whether the model has converged from the preceding iteration to the present iteration is tested (C4), with a view to: o if not, carrying out a new iteration, o if so, performing a computation (D) of the complex envelopes on the basis of the iterations that have been carried out.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: September 12, 2023
    Assignee: SAFRAN
    Inventors: Yosra Marnissi, Dany Abboud, Mohammed El Badaoui
  • Publication number: 20230016039
    Abstract: Method for monitoring a turbomachine comprising a stator and a rotor, device, system, aircraft and computer program product. The method comprises a step of acquiring an input signal which represents a deformation of the stator or rotor of the turbomachine. The input signal has been acquired by a deformation gauge which is attached to the stator or rotor. The input signal comprises a first component which represents deformations of the stator or rotor which are caused by rotation of the rotor vanes in relation to the stator, and a second component which represents deformations which are caused by different elements of the rotor vanes. The method comprises a step of re-sampling the input signal in order to obtain a re-sampled input signal comprising a predefined whole number of samples per revolution of the turbomachine rotor.
    Type: Application
    Filed: December 4, 2020
    Publication date: January 19, 2023
    Applicants: SAFRAN, SAFRAN AIRCRAFT ENGINES
    Inventors: Dany ABBOUD, Mohammed EL BADAOUI, Nicolas Paul TABLEAU
  • Publication number: 20220412793
    Abstract: The invention relates to a method (1) for monitoring a rotating machine (100) of an aircraft, wherein a measurement signal is acquired from the rotating machine. According to the invention, instantaneous frequencies (fK(t)) of sinusoidal components of the measurement signal are estimated, and, using a computing module (12), a plurality of successive iterations are carried out in each of which: complex envelopes of the components are updated (C1), parameters of a model of a noise of the signal are updated (C21) on the basis of the envelopes, whether the model has converged from the preceding iteration to the present iteration is tested (C4), with a view to: o if not, carrying out a new iteration, o if so, performing a computation (D) of the complex envelopes on the basis of the iterations that have been carried out.
    Type: Application
    Filed: November 3, 2020
    Publication date: December 29, 2022
    Applicant: SAFRAN
    Inventors: Yosra MARNISSI, Dany ABBOUD, Mohammed EL BADAOUI
  • Patent number: 11422024
    Abstract: A method detects a defect in a vibration sensor including the whitening of the vibratory signal delivered by the vibration sensor, and the calculation of an indicator of asymmetry of the whitened vibratory signal. The whitening may be a cepstral whitening implemented simply by dividing the Fourier transform of the signal by its modulus. The asymmetry indicator is a counter of aberrant points in the whitened vibratory signal.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: August 23, 2022
    Assignee: SAFRAN
    Inventors: Dany Abboud, Mohamed El Badaoui
  • Patent number: 11333576
    Abstract: A method includes obtaining a vibration signal acquired by an accelerometer sensor; eliminating a deterministic component of the vibration signal; obtaining, for a determined defect, a characteristic theoretical frequency of this defect and a determined maximum deviation around this theoretical frequency; computing, as a function of a cyclic frequency, an integrated cyclic coherence of the processed vibration signal; estimating an actual frequency of the defect on the basis of the integrated cyclic coherence, of the theoretical frequency of the defect and of the maximum deviation; computing a diagnostic indicator of the defect by summing M integrated cyclic coherences of the vibration signal evaluated as M cyclic frequencies respectively equal to M harmonics of the estimated actual frequency of the defect; comparing the diagnostic indicator of the defect with a predetermined threshold, and in the event of it being exceeded, detecting the defect on the bearing.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 17, 2022
    Assignee: SAFRAN
    Inventors: Dany Abboud, Mohammed El Badaoui
  • Patent number: 11280701
    Abstract: The invention relates to an acquisition module for a monitoring system of a rotating machine, in particular of an aircraft engine, the acquisition module comprising at least one measurement sensor for measuring an analogue signal x(t) of a physical quantity of a member of the rotating machine, at least one sample-and-hold device configured to collect a sample of the analogue signal x(t) at sampling times t n and to maintain it constant between two sampling times t n, and at least one memory for storing samples, the sample-and-hold device being configured to collect a sample of the analogue signal x(t) at sampling times t n defined in a random manner, the sampling times t n being defined according to the following law t n=n? t+? n, the samples and the sampling times t n being stored in the memory.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: March 22, 2022
    Assignee: SAFRAN
    Inventors: Dany Abboud, Mohamed El Badaoui
  • Publication number: 20210239570
    Abstract: The invention concerns a method for monitoring a gear system (1) comprising at least two wheels, each wheel having a characteristic frequency (f1, f2), a vibratory or acoustic signal representative of these vibrations having been acquired by a sensor (21), a vibratory or acoustic digital signal x(t) having been obtained, the method comprising, for each characteristic frequency of the system (1), the steps of filtering (E1) the digital signal by means of a filter in such a way as to obtain an image monitoring signal of at least one vibratory component of at least one defect; determining (E3) the square envelope of said monitoring signal, defined by the square absolute value of the Hilbert transform of the monitoring signal so as to extract an image of the modulating signals associated with the rotation of the wheels from the monitoring signal; determining (E4) the synchronous average of said square envelope relative to the period of rotation of a wheel of interest chosen from the wheels of the gear, said avera
    Type: Application
    Filed: April 19, 2019
    Publication date: August 5, 2021
    Applicant: SAFRAN
    Inventors: Dany ABBOUD, Mohamed EL BADAOUI, Yosra MARNISSI
  • Publication number: 20210080352
    Abstract: The invention relates to an acquisition module for a monitoring system of a rotating machine, in particular of an aircraft engine, the acquisition module comprising at least one measurement sensor for measuring an analogue signal x(t) of a physical quantity of a member of the rotating machine, at least one sample-and-hold device configured to collect a sample of the analogue signal x(t) at sampling times t n and to maintain it constant between two sampling times t n, and at least one memory for storing samples, the sample-and-hold device being configured to collect a sample of the analogue signal x(t) at sampling times t n defined in a random manner, the sampling times t n being defined according to the following law t n=n? t+? n, the samples and the sampling times t n being stored in the memory.
    Type: Application
    Filed: April 2, 2019
    Publication date: March 18, 2021
    Applicant: SAFRAN
    Inventors: Dany Abboud, Mohamed El Badaoui
  • Publication number: 20210063276
    Abstract: A method includes obtaining a vibration signal acquired by an accelerometer sensor; eliminating a deterministic component of the vibration signal; obtaining, for a determined defect, a characteristic theoretical frequency of this defect and a determined maximum deviation around this theoretical frequency; computing, as a function of a cyclic frequency, an integrated cyclic coherence of the processed vibration signal; estimating an actual frequency of the defect on the basis of the integrated cyclic coherence, of the theoretical frequency of the defect and of the maximum deviation; computing a diagnostic indicator of the defect by summing M integrated cyclic coherences of the vibration signal evaluated as M cyclic frequencies respectively equal to M harmonics of the estimated actual frequency of the defect; comparing the diagnostic indicator of the defect with a predetermined threshold, and in the event of it being exceeded, detecting the defect on the bearing.
    Type: Application
    Filed: December 19, 2018
    Publication date: March 4, 2021
    Applicant: SAFRAN
    Inventors: Dany ABBOUD, Mohamed EL BADAOUI