Abstract: An apparatus for diagnosing and controlling the aerodynamic stability of a compressor and method there of are provided. The apparatus includes a measurement device (100), a signal processing device (200) and a control and execution device (300), wherein the measurement device (100) is configured to measure the pressure or velocity fluctuations of air flows in different positions inside a compressor in real time, and to transmit real-time measurement signals obtained from different positions to the signal processing device (200); the signal processing device (200) is configured to determine, according to the real-time measurement signals, a type and spatial distribution of instability precursor in the compressor, and to output corresponding control strategy signals to the control and execution device (300); and the control and execution device (300) executes, according to the received control strategy signals, corresponding control actions to regulate the stability of the compressor (S3).

Abstract: Methods, apparatus, and articles of manufacture are disclosed. An example pre-amplifier includes a demodulator to combine a chirp signal with an acoustic emission signal to generate a sideband acoustic emission signal, sample spectral data of the sideband acoustic emission signal at an intermediate center frequency in an intermediate frequency bandwidth, and generate demodulated acoustic emission data based on mapping the sampled spectral data to a measurement center frequency, the measurement center frequency different from the intermediate center frequency, and a transmitter to transmit the demodulated acoustic emission data to a computing device.

Abstract: According to an aspect, there is provided method for analyzing movement. Initially, information on one or more desired movement properties for a moving element of a mechanical system powered by an electrical machine which is controlled by a drive is maintained in a memory of a wireless sensing device. The wireless sensing device including one or more sensors is detachably fixed to the moving element of the mechanical system. The one or more sensors include one or more kinematic sensors. The wireless sensing device acquire results of a plurality of measurements performed by the wireless sensing device while the moving element is in motion. During the acquiring, the wireless sensing device compares results of the plurality of measurements with the one or more desired movement properties and communicates with the drive to adjust one or more drive parameters based on the comparing.

Abstract: A contact vibration detection device 100 for detecting contact vibration due to contact between a rotational shaft 12 and a stationary part 13 includes: a rotation waveform determination unit 101 configured to determine a rotation waveform of the rotational shaft 12 based on displacement of the rotational shaft 12 during rotation; a parameter change detection unit 102 configured to detect a change in a parameter of at least one of an effective value of the rotation waveform or a phase angle of the rotation waveform; and a contact vibration determination unit 103 configured to determine whether the contact vibration occurs based on presence or absence of the change in the parameter.

Abstract: An apparatus for detecting a transient event in an operating machine, the apparatus comprising: a controller configured to control performance of the following steps: a measurement step comprising measuring a periodic signal from a machine; a processing step comprising synchronously processing the periodic signal to track the primary frequency; a filtering step comprising removing the primary periodic component and its harmonics from the periodic signal to yield a filtered dataset; an integration step comprising integrating the filtered dataset over the remaining frequencies to yield an integrated dataset representing the periodic energy at frequencies other than the primary frequency and its harmonics; an analysis step comprising identifying a short-term transient in the integrated dataset to identify a transient disruption in the operation of the machine.

Abstract: A test arrangement for fatigue testing a wind turbine blade, including a floor-mounted test rig having a fixing device for fixing the wind turbine blade to the test rig and an excitation assembly for exciting the wind turbine blade at a test frequency, wherein the test rig includes a liquid tank having a chamber containing a predefined liquid, wherein the liquid in the liquid tank has a resonance frequency depending on the amount of liquid in the liquid tank and the chamber geometry is provided.

Abstract: A vibration measurement and analysis system identifies faulty bearings in a machine based on spectral vibration data. The system includes vibration sensors attached to the machine that generate vibration signals. A vibration data collector generates vibration spectral data based on the vibration signals. The vibration spectral data comprises vibration amplitude versus frequency data that includes peak amplitudes at corresponding peak frequencies. At least some of the peak amplitudes are associated with vibration generated by the faulty bearings.

Abstract: A device for identifying a type of a bearing is provided. The device includes a detection unit for detecting a vibration frequency of the bearing, and an identification unit for identifying the type of the bearing based on the detected vibration frequency.

Abstract: Disclosed herein is a method of automatically determining an operating condition of at least part of a gas turbine engine 10 for an aircraft, the method comprising: measuring one or more gas pressure waves by a gas pressure detector 401, wherein the gas pressure detector 401 is located in the gas turbine engine 10; and automatically determining, by a computing system, an operating condition of at least part of a gas turbine engine 10 in dependence on an output signal of the gas pressure detector 401.

Abstract: Wind turbine lightning stroke diagnostic apparatus for a wind turbine having conductive blades. A lightning protection system input is provided for receiving measured current data associated with a current conducted by the lightning protection system following a lightning stroke. An air pressure sensor is mounted using a mount within an internal cavity of a conducive wind turbine blade assembly. A sensor monitor monitors the measured current data and the output of the air pressure sensor for identifying a bypass lightning stroke when a measured current increase coincides with the detection of a lightning generated shockwave within the internal cavity by the air pressure sensor.

Abstract: An approach for detecting rotor anomalies is disclosed. Vibration data for a vibration sensor(s) and for a transient speed operation is classified into a plurality of rotor speed ranges. A predetermined percentile vibration amplitude is determined for each rotor speed range for the vibration sensor(s). Using historical vibration measurement data obtained from a predetermined number of previous transient speed operations performed by at least the rotor, it is determine whether a vibration measurement obtained during the transient speed operation is indicative of a rotor anomaly by determining whether a trend exists in the predetermined percentile vibration amplitude for at least one of the rotor speed ranges and the vibration sensor(s) over a preset number of previous transient speed operations. A rotor anomaly is indicated where a trend exists.

Abstract: Methods and apparatus for real-time clearance assessment using a pressure measurement are disclosed. An example method includes determining a first and a second static pressure measurement at a first measurement location and a second measurement location, respectively, relative to the blade tip clearance, determining a normalized pressure measurement using the first and second static pressure measurements, generating a conversion curve to correlate the normalized pressure measurement with a clearance measurement, and adjusting active clearance control of the blade tip clearance based on a comparison of real-time in-flight pressure measurements to the conversion curve.

Abstract: A computer implemented method for detecting a damage to a gas turbine engine. The gas turbine engine includes a fan and a plurality of turbine stages including a low pressure turbine stage. The fan is drivably coupled to the low pressure turbine stage. The method includes receiving a first signal indicative of a speed of rotation of the fan. The method further includes receiving a second signal indicative of a speed of rotation of the low pressure turbine stage. The method further includes determining a difference metric representative of a difference between the speed of rotation of the fan and the speed of rotation of the low pressure turbine stage. The method further includes determining whether a damage event has occurred based on whether the difference metric passes a threshold.

Abstract: There is provided an inductive sensing circuit, comprising a signal generator, configured to generate a drive signal; one or more sensing arrangements, each of the one or more sensing arrangements comprising: two sets of one or more inductive sensing elements, configured in a half bridge arrangement, the two sets of one or more inductive sensing elements driven by the drive signal; a correction signal circuit, configured to generate a correction signal, wherein the correction signal is an adjustably scaled version of the drive signal; and a summing circuit, configured to sum an output signal of the two sets of one or more inductive sensing elements with the correction signal; and a demodulation circuit, configured to demodulate an output of the summing circuit of each of the one or more sensing arrangements.

Abstract: Methods and systems for measuring an axial position of a rotating component of an engine are described herein. The method comprises obtaining a signal from a sensor coupled to the rotating component, the rotating component having a plurality of position markers distributed about a surface thereof, the position markers having an axially varying characteristic configured to cause a change in a varying parameter of the signal as a function of the axial position of the rotating component. Based on the signal, the method comprises determining a rotational speed of the rotating component from the signal, determining the varying parameter of the signal, and finding the axial position of the rotating component based on a known relationship between the axial position, the rotational speed, and the varying parameter of the signal.

Abstract: An aero damping measurement system is provided. The system includes a shroud defining a tunnel, a hub disposed within the tunnel, and a plurality of blades coupled to the hub. The blades may rotate about the hub. A gas pressure probe may have a tip extending to the tunnel to deliver a pressurized burst into the tunnel. An aeromechanical identification system may include a pressurized gas source, a valve in fluid communication with the pressurized gas source, and the gas pressure probe may be in fluid communication with the valve. The valve may control a flow of a pressurized gas from the pressurized gas source into the gas pressure probe. A pressure sensor may be coupled to the gas pressure probe and configured to measure a pressure within the gas pressure probe.

Abstract: A bearing defect auto-detection system includes a processor to receive condition monitoring data that includes vibration harmonics corresponding to a bearing coupled to a rotatable shaft. The processor performs a pattern sweeping process that sweeps a pattern through both a speed range and a bearing class defect frequency range. In response to the test pattern having at test pattern sideband, the processor also sweeps the test pattern sideband through a sideband range, against the condition monitoring data to determine the pattern's fundamental frequency and sideband frequency. The processor determines a most probably bearing defect type associated with the bearing based on the best match value amongst results associated with the test pattern. The processor also performs a post-sweep logic process that compares a number (N) of most recent results from the pattern sweeping process to at least one conditional test to confirm the most probably bearing defect type is present.

Abstract: System for data collection and monitoring in an industrial environment are disclosed. A data acquisition circuit may interpret a plurality of detection values, each of the plurality of detection values corresponding to at least one of a plurality of input sensors. A data storage circuit may store sensor specifications, anticipated state information and detected values for use by a signal evaluation to determine a sensor overload status, a sensor fault status or a sensor validity value of at least one sensor in response to the plurality of detection values and at least one of an anticipated state information or a sensor specification. A response circuit may perform an operation in response to one of a sensor overload status, a sensor health status, or a sensor validity status.

Abstract: A crack detection device performs online identification of the occurrence and propagation of a crack in the surface of the barrel portion of a rolling roll. A rolling roll is provided with the crack detection function without any substantial modification of the rolling device and without any continuous disposition of multiple sensors in the rolling roll. The detection device is incorporated in a rolling device having a barrel portion and shaft portions extending as a unit from both ends of the barrel portion and includes the rolling roll where an AE sensor detecting elastic waves generated on a surface of the barrel portion and a calculation unit calculating a feature value of the elastic waves detected by the AE sensor are disposed in at least one of the shaft portions and a discrimination unit discriminating, from the feature value, elastic waves attributable to a crack occurring in the barrel surface.

Abstract: A system and method for monitoring a dry gas seal positionable between a stationary housing and a rotatable shaft. A plurality of sense elements may rotate in response to the rotation of the rotatable shaft and a speed sensor may sense the speed of the rotatable shaft at speeds below one thousand rotations per minute based on sensing the plurality of sense elements. An acoustic emissions sensor may sense when a first seal face and a second seal face forming a seal interface of the dry gas seal are in an operational condition relative to one another. A processor may receive output signals from the speed sensor and the acoustic emissions sensor, and may establish an operating condition of the dry gas seal based on the signal from the speed sensor when the first seal face and the second seal face reach the operational condition relative to one another.

Abstract: An apparatus for analysing the condition of a machine having a part rotating with a speed of rotation (fROT), comprising: a first sensor (10) adapted to generate an analogue electric measurement signal (SEA) dependent on mechanical vibrations (VMD) emanating from rotation of said part; an analogue-to-digital converter (40, 44) adapted to sample said analogue electric measurement signal (SEA) at an initial sampling frequency (fS) so as to generate a digital measurement data signal (SMD, SENV) in response to said received analogue electric measurement signal (SEA); a device (420) for generating a position signal (Ep) having a sequence of position signal values (P(i)) for indicating momentary rotational positions of said rotating part; and a speed value generator (601) being adapted for recording a time sequence of said position signal values (P(i)) such that there are angular distances (delta-FIp1-p2, delta-FIp2-p3) and corresponding durations (delta-Tp1-p2; delta-Tp2-p3) between at least three consecutive posi

Abstract: An engine control module comprises an input terminal configured to receive an input signal, an analog-to-digital converter configured to receive the input signal from the input terminal, control circuitry configured to receive the input signal from the analog-to-digital converter and to control at least one engine output based on the input signal, and an adjustable low-pass filter. The adjustable low-pass filter is coupled between the input terminal and the analog-to-digital converter such that the analog-to-digital converter receives the input signal from the input terminal via the adjustable low-pass filter. The adjustable low-pass filter is configured to filter the input signal from the input terminal prior to the input signal being applied to the analog-to-digital converter.

Abstract: A method for determining an arrival-time of a rotor blade that includes attaching an RF reader to a stationary surface and an RF tag to the rotor blade. Time-of-flight data points are collected via an RF monitoring process that includes: emitting an RF signal from the RF reader and recording a first time; receiving the RF signal at the RF tag and emitting a return RF signal by the RF tag in response thereto; receiving the return RF signal at the RF reader and recording a second time; and determining the time-of-flight data point as being the duration occurring between the first time and the second time. The RF monitoring process is repeated until multiple time-of-flight data points are collected. A minimum time-of-flight is determined from the multiple time-of-flight data points, and the arrival-time for the rotor blade is determined as being a time that corresponds to the minimum time-of-flight.

Abstract: Embodiments of the present disclosure provide systems, methods, and computer-readable storage media configured to monitor wind turbines and detect damage to one or more components of the wind turbines, such as damage to the blades. The techniques disclosed herein may utilize sensors (e.g., acoustic sensors) disposed within air cavities of one or more blades of the wind turbines to detect acoustic signals or acoustic energy caused by corrosive impacts (e.g., wind, dust, rain, hail, lightning, etc.) to the wind turbine. Information associated with the acoustic signals may be provided to and received by a processor used to determine whether one or more of the blades of the wind turbines have been damaged. The techniques disclosed herein may facilitate real-time or near-real-time monitoring of wind turbines for damage, which may enable more efficient operation and maintenance of wind turbines.

Abstract: A vibrometer assembly including a vibrometer configured to measure vibration of a rotating shaft, includes: a probe of the vibrometer that is to be secured to a bearing device that supports the rotating shaft; a guide cylinder that is to be provided to a case so as to penetrate the case and protrude into the case, the case being located outside the bearing device; an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.

Abstract: A display apparatus includes a display module including a display panel configured to display an image and a first sound generating device on a rear surface of the display panel, the first sound generating device including a first vibration generating device and a second vibration generating device adjacent to the first vibration generating device, the first vibration generating device is configured to vibrate a center region of the first sound generating device based on a signal applied to the first sound generating device, and the second vibration generating device is configured to vibrate a periphery of the display panel based on the applied signal.

Abstract: A real-time monitoring and analysis method for a mechanical seal. In the method, an acoustic emission signal generated by a friction pair at a mechanical seal end surface is measured; a specific acoustic source generate signals on a plurality of specific frequency bands on an acoustic scale. In a seal operating process motion causes the acoustic emission signal to change on a dynamic time scale equivalent to a period of rotation. In a long-term seal service process, cumulative performance changes occur on a service time scale due to running-in, wear, and/or aging of elastic elements; for this feature, the long-term change process of the acoustic emission signal needs to be considered. Analysis is performed, on multiple scales, in combination with auxiliary information and with determined physical characterization quantities passed to scales of longer time, thereby determining the real-time working state of the seal and providing a performance change expectation of the seal.

Abstract: A mining machine having a control system for operating the mining machine. The control system includes a vibration monitor. The mining machine further includes a sensor and a vibration control system. The sensor senses vibration of a component of the mining machine. The vibration control system determines when the mining machine is moving in a proper cycle, triggers acquisition of vibration sensor data from the sensor in response to determining that the mining machine is moving in the proper cycle, and outputs the vibration sensor data.

Abstract: A method to monitor the health status of a rolling bearing of a machinery, including a first acquiring step of a rotation speed value of a shaft coupled to the rolling bearing, a second acquiring step of a first signal generated by a vibration sensor located on the machinery in a position distant from the rolling bearing, and a first calculating step of a variation of the shaft rotation speed value during a predetermined time interval, and if the calculated variation of the rotation speed falls within a predetermined variation interval, performing a first filtering step of the first signal with a first algorithm based on a vibration produced by parts of the machinery different from the bearing at the rotation speed value, so as to obtain a second signal representative of a bearing health status.

Abstract: A method of mitigating vibration in a radar system on a moving platform includes obtaining received signals resulting from reflections of transmitted signals by one or more objects in a field of view of the radar system. The received signals are a three-dimensional data cube. The method also includes processing the received signals to obtain a first three-dimensional map and second three-dimensional map, estimating the vibration based on performing a first detection using the second three-dimensional map, and cancelling the vibration from the first three-dimensional map to obtain a corrected first three-dimensional map. A corrected second three-dimensional map is obtained by further processing the corrected first three-dimensional map; and a second detection is performed using the corrected second three-dimensional map.

Abstract: Monitoring a processing asset for one of an oil processing facility and a gas processing facility includes a data acquisition circuit structured to interpret a plurality of detection values corresponding to input received from a detection package, the detection package comprising at least one of a plurality of input sensors, each of the plurality of input sensors operatively coupled to at least one of a plurality of process components; a data analysis circuit structured to analyze a subset of the plurality of detection values to determine a status parameter; and an analysis response circuit structured to adjust a process utilizing the processing asset in response to the status parameter comprising altering at least one process parameter selected from the process parameters consisting of: a temperature, an operating speed, a utilization value of one of the plurality of process components, and a process flow.

Abstract: In one example embodiment, a fluid induced instability detection system is provided that monitors various vibration characteristics of a turbomachine, collects vibration data in real-time, and uses the vibration data to detect and analyze changes in various operating parameters such as vibration, speed, and loading conditions, and to provide an indication of a vibration anomaly and/or potential operational risk in one or more components of the turbomachine. The vibration data can be particularly associated with certain components that are directly or indirectly impacted by a modification in process fluid flow characteristics or lubrication oil flow characteristics in the turbomachine due to various reasons such as process fluid flow disturbances, lubricating oil flow disturbances, and/or a change in turbomachine operational parameters. The fluid induced instability detection system detects abnormalities in the vibration data and provides an indication of one or more potential faults in the turbomachine.

Abstract: Equipment monitoring employing time-triggered Ethernet communications is provided. Two or more sensor assemblies can be configured to transmit sensor signals representative of one or more operating parameters of a machine to a monitoring system over a token ring Ethernet network. The monitoring system can synchronize timing between the sensor assemblies and schedule timing of respective sensor signal transmissions to bound latency of the scheduled transmissions. Alternatively, or additionally, the monitoring system can include an Ethernet backplane configured to allow Ethernet communication between two or more processing cards coupled thereto. A switch in communication with the Ethernet backplane can schedule transmissions between the processing cards coupled to the Ethernet backplane to guarantee latency of the scheduled transmissions.

Abstract: A journal bearing is provided that supports a rotating shaft to be rotatable around a central axis and includes: a bearing main body that has a sliding contact surface that is in sliding contact with the rotating shaft, an outer circumferential surface that is directed outward in the radial direction to face a side opposite to the sliding contact surface, a recess that is recessed from an outer circumferential surface of the bearing main body inward in the radial direction, and a groove that continuously extends from the recess; a sensor main body that is housed in the recess; and a sensor wiring whose one end is connected to the sensor main body and in which a part thereof in a length direction is housed in the groove.

Abstract: An aero damping measurement system is provided. The system includes a shroud defining a tunnel, a hub disposed within the tunnel, and a plurality of blades coupled to the hub. The blades may rotate about the hub. A gas pressure probe may have a tip extending to the tunnel to deliver a pressurized burst into the tunnel. An aeromechanical identification system may include a pressurized gas source, a valve in fluid communication with the pressurized gas source, and the gas pressure probe may be in fluid communication with the valve. The valve may control a flow of a pressurized gas from the pressurized gas source into the gas pressure probe. A pressure sensor may be coupled to the gas pressure probe and configured to measure a pressure within the gas pressure probe.

Abstract: A method for a position determination of a turbine blade of a high-pressure turbine stage of a gas turbine that is connected to a high-pressure compressor via a shaft, wherein each turbine blade of the high-pressure turbine is recorded on a record card with a relative position. The method includes: determining a position of a blade lock of a stage of the high-pressure compressor, where the stage is selected such that, when the gas turbine is mounted, the blade lock is brought into view of a boroscope, which is guided through a boroscope opening on the gas turbine by rotating the shaft, and so that the blade lock can be identified; and marking that turbine blade on the record card that is in view of a second boroscope, which is guided through a second boroscope opening on the gas turbine when the blade lock is in view of the boroscope.

Abstract: Equipment monitoring employing time-triggered Ethernet communications is provided. Two or more sensor assemblies can be configured to transmit sensor signals representative of one or more operating parameters of a machine to a monitoring system over a token ring Ethernet network. The monitoring system can synchronize timing between the sensor assemblies and schedule timing of respective sensor signal transmissions to bound latency of the scheduled transmissions. Alternatively, or additionally, the monitoring system can include an Ethernet backplane configured to allow Ethernet communication between two or more processing cards coupled thereto. A switch in communication with the Ethernet backplane can schedule transmissions between the processing cards coupled to the Ethernet backplane to guarantee latency of the scheduled transmissions.

Abstract: A blade vibration monitor including a self-adjusting sensor gap mechanism is provided. The blade vibration monitor includes a probe configured to be disposed in a mounting hole within a turbine casing of a steam turbine. A proximity sensor is disposed within a tip of the probe producing a signal in response to a turbine blade passing the sensor. A positioning means is used to position a depth of the probe with respect to the mounting hole. A processor processes the signal to determine a gap distance between the probe and the turbine blade. Based on the determined gap distance the processor controls the positioning means to adjust the probe depth relative to the mounting hole in order to set the gap distance in real time to a minimal gap distance. A method for setting a gap distance between a turbine blade tip and a proximity sensor is also provided.

Abstract: An apparatus for analyzing the condition of a machine having a rotating part, includes: a first sensor for generating an analogue electric measurement signal; an analogue-to-digital converter for sampling the analogue electric measurement signal at an initial sampling frequency to generate a digital measurement data signal in response to the received analogue electric measurement signal; a device for generating a position signal having a sequence of position signal values for indicating momentary rotational positions of the rotating part; and a speed value generator for recording a time sequence of the position signal values such that there are angular distances and corresponding durations between at least three consecutive position signals, wherein the speed value generator establishes at least two momentary speed values based on the angular distances and corresponding durations, and further momentary speed values for the rotating part are established by interpolation between the two momentary speed valu

Abstract: An abnormality detecting apparatus (10) for a rotating machine includes: a calculating part (15) which calculates a phase difference between signals respectively output from two sensors of one or more sets, the one or more sets being predetermined combinations of two sensors among the plurality of sensors, the plurality of sensors each of which detects an elastic wave generating in the rotating machine (1) having a rotor during rotation of the rotor, the sensors being arranged at predetermined different locations of the rotating machine (1); a storing part (16) which stores in advance information concerning a relationship between a phase difference and a contact position when a contact occurs during the rotation of the rotor, regarding the one or more sets; and a specifying part (17) which specifies a contact position by using a phase difference calculated by the calculating part (15) and the information stored in the storing part (16).

Abstract: A rotor arrangement and method by which a time reference is provided for a rotor. The rotor includes N time of arrival features. The method includes steps to: provide a plurality of time of arrival probes spaced apart circumferentially outside the periphery of the rotor; for each revolution of the rotor, measure a time of arrival of each feature at each probe; select N time of arrival measurements at each probe; derive a best fit of the measured times of arrival measured at all the probes against angular position; and set the time reference for the next revolution of the rotor equal to the best fit at the end of the current revolution of the rotor.

Abstract: A method of analysing blade tip displacements (dijk) derived from a rotor having an array of blades that rotate at a rotational speed (?). The blades are monitored by an array of stationary timing probes for at least two revolutions (j) of the rotor. Define asynchronous displacement (dijk_A) as a sum of a sinusoidal term (Va) and an offset per probe term (Oo). Define synchronous displacement (dijk_S) as a sum of a sinusoidal term (Vs) and a common offset term (Cc). Solve the asynchronous displacements (dijk_A) using the blade tip displacements (dijk) to give asynchronous amplitude (|a|), offset per probe (ok) and asynchronous residuals (rijk_A). Solve the synchronous displacements (dijk_S) using the blade tip displacements (dijk) to give synchronous amplitude (|s|), common offset (cj) and synchronous residuals (rijk_S).

Abstract: A fluid energy machine, with a machine housing (10), and with at least one shaft (11) that is mounted in the machine housing (10), which is assigned at least one sensor (12), with the help of which vibrations of the respective shaft are detectable, with at least one mounting sleeve (13), which extends through a bore (14) in the machine housing (10), wherein on a first portion (15) of the respective mounting sleeve (13), which faces the shaft, a sensor (12) is mounted, wherein in the region of the first portion (15) of the respective mounting sleeve (13) an adjusting device (16) is formed in order to align the respective sensor (12) relative to the respective shaft (11), and wherein on a portion (17) of the respective mounting sleeve (13) facing away from the shaft (11) a fixing device (18) engages in order to fix and seal the respective mounting sleeve (13) on the machine housing (10).

Abstract: The present disclosure relates to a system to compensate for mechanical forces on a rotating rotor of an electric machine, to a method for compensating mechanical forces on a rotating rotor of an electric machine, and to a use of a corresponding system. Disclosed is a system for compensating torsions at a rotating rotor. The system includes at least one measuring device for measuring specific properties of the rotor, an analyzer unit for analyzing the measurement data of the measuring device, a compensation means for compensating the torsions at the rotor, the compensation means comprise a power supply unit generating a signal adapted in amplitude and frequency to the measured properties of the rotor, and to apply the generated signal to the rotor, and the power supply unit is a frequency converter.

Abstract: A method for monitoring sub-synchronous torsional oscillations of a shaft line of a steam turbine includes measuring a rotational speed of the shaft line over a period of time and generating, from the measured rotational speed, a signal representative of the rotational speed over the period of time. The method further includes performing a spectrum analysis on the signal to determine, for at least one given frequency, an amplitude of variation of the rotational speed at the given frequency, comparing the amplitude with at least one predetermined amplitude threshold for the frequency, and generating an alert signal if the amplitude exceeds at least one predetermined amplitude threshold.

Abstract: A microphone assembly is disclosed. In an embodiment, the assembly includes a transducer and an electronic circuit operatively connected to the transducer, wherein the electronic circuit comprises a test mode circuitry configured to selectively set the microphone assembly in one or more test modes or an operational mode, and wherein the one or more test modes enable determining at least one parameter of the transducer.

Abstract: An edge detector is provided for determining the axial position of the leading or trailing edge of a rotating blade within rotating machinery. The edge detector includes a set of axially spaced tip detection probes locatable within a casing of the machinery. Each probe is arranged to detect whether or not the blade tip passes over that probe. The edge detector determines the axial position of the edge of the blade as the position of the boundary between those tip detection probes which detect passage of the blade tip thereover and those tip detection probes which detect no passage of the blade tip thereover.

Abstract: A method includes receiving an input signal containing information associated with a rolling element bearing and/or a piece of equipment containing the rolling element bearing. The method also includes decomposing the input signal into a frequency-domain signal and determining at least one family of frequencies corresponding to at least one failure mode of the rolling element bearing. The method further includes generating a reconstructed input signal using the at least one family of frequencies and the frequency-domain signal. In addition, the method includes determining, using the reconstructed input signal, an indicator identifying an overall health of the rolling element bearing. The indicator could be determined using a baseline signal associated with either (i) normal operation of the rolling element bearing and/or the piece of equipment or (ii) defective operation of the rolling element bearing and/or the piece of equipment (where a severity of the defective operation will increase over time).

Abstract: A system for detecting a rotational speed of a turbocharger includes: a rotational speed sensor unit which includes a radar transmitter for emitting radar waves and a radar receiver for receiving the radar waves and which is designed to detect radar waves reflected by a machine element of the turbocharger and to provide them as a measuring signal; and an evaluation unit which is coupled to the rotational speed sensor unit and is designed to check whether the reflected radar waves are detectable by the radar receiver based on a predetermined criterion and to ascertain the rotational speed of the turbocharger based on an evaluation of the measuring signal.

Abstract: A method is provided for monitoring one or more rotating turbine engine rotor blades using a processing system and a sensor having a measurement field. The method includes steps of: (i) providing measurement data from the sensor as a first of the rotor blades passes through the measurement field; (ii) correlating the measurement data with reference data as a function of time to provide correlation data; and (iii) processing the correlation data to determine a peak correlation value that corresponds to a point in time during the passage of the first of the rotor blades through the measurement field; wherein the correlating and the processing are performed by the processing system.