48 results about "Transient failure" patented technology

The invention discloses a fault diagnosis method, system and device based on a first-in first-out strategy and a medium. The method comprises the following steps: dynamically caching cache data of a preset duration according to the first-in first-out strategy through a circular queue; performing wavelet hierarchical compression processing on the cached data to obtain fundamental wave layer data and high-frequency layer data; if the cache data meets a preset condition, feature extraction is carried out on the fundamental wave layer data and the high-frequency layer data, and overload detection features and short circuit detection features are obtained; and inputting the overload detection characteristics and the short circuit detection characteristics into a preset diagnosis model to determine confidence corresponding to each fault type, determining a switch life state based on the switch opening driving signal, and determining a fault diagnosis result based on the confidence corresponding to each fault type and the switch life state. According to the invention, the identification accuracy and efficiency of the transient fault can be improved.

The invention relates to a wind turbine spindle health state real-time monitoring method, device and equipment and a medium, and the method comprises the steps: generating a synchronous purification vibration sequence and an environment parameter sequence through multi-sensor data cooperative processing, and constructing an environment correction feature vector based on the combination of the dynamic change of wind speed and the temperature and humidity coupling effect; an intelligent boundary decision algorithm is utilized to fuse historical states and real-time features to generate a self-adaptive anomaly detection threshold value, and finally a spindle health state identifier is output through real-time comparison of a vibration feature norm and a dynamic threshold value. The method breaks through the limitation of traditional fixed threshold value monitoring, effectively solves the problem of false alarm caused by sudden wind speed change and temperature and humidity interference, remarkably reduces the coupling influence of environmental factors, realizes millisecond-level response to transient faults, and provides accurate and reliable health state evaluation for the main shaft of the wind turbine unit.

The present storage solution provides an order of operations of a computer-implemented method for performing transient failure handling with an improved application I / O resumption time for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing persistent failure handling with an improved application I / O resumption time for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing transient failure handling with an improved application I / O resumption time to maintain dependent write order consistency for a symmetric distributed storage system; an order of operations of a computer-implemented method for performing secondary side write Op handling to maintain dependent write order consistency for a symmetric distributed storage system; and an order of operations of a computer-implemented method for performing secondary side read Op handling to maintain dependent write order consistency for a symmetric distributed storage system in accordance with some embodiments.

A three-phase adaptive reclosing method and system for wind farm transmission lines based on parallel reactor current is provided. When a phase to phase or three-phase fault occurs in the transmission line, the circuit breakers at both ends trip. The current transformer is used to sample the three-phase current signal of the parallel reactor, calculate the differential mode current of the parallel reactor, and perform zero crossing detection to construct a fault nature identification criterion. The fault nature is determined within the maximum discrimination time limit combined with the sliding time window. For permanent faults, the reclosing device is locked; for transient faults, calculate the time when the fault disappears and determine the reclosing time, and open the reclosing device. The method and system identifies the nature of faults by detecting whether the differential current of parallel reactors crosses the zero axis, with low sampling rate requirements, and small errors.

The invention discloses a fault-tolerant control method for a discrete-time Markov jump power system, which belongs to the technical field of power system control and comprises the following steps of: introducing a hidden Markov process with unknown partial information to solve the problems of transient faults in a power line, subsequent switching of related circuit breakers and limited mode information of the power system; the influence of the fault-tolerant control of the power system on the stability is considered; establishing a controller model to obtain a closed-loop system model of the system; on the basis of the Lyapunov stability theory, sufficient conditions for ensuring the random stability of the closed-loop system and meeting expected performance are obtained; proving that the inequality condition is effective by utilizing a Lyapunov function and a performance index function; calculating a gain matrix of the controller by using simulation software; and realizing fault-tolerant control of the system according to the gain matrix of the controller and given system parameters. According to the invention, fault-tolerant control of the system can be realized based on a mode of combining performance index control and controller control.

The invention belongs to the technical field of rail traffic signals, particularly relates to a rail circuit interference test analysis method, system and equipment, and aims to solve the problems that a mixed interference source is difficult to accurately position, accidental faults cannot be captured and diagnosis is subjective. The method comprises the following steps: performing multi-channel synchronous acquisition and real-time storage on a voltage signal and a current signal of a track circuit; processing the original signal in real time, analyzing different frequency components through high-resolution spectrum analysis, and comparing with a preset threshold in combination with time domain analysis to trigger an alarm and generate a real-time analysis report; and performing intelligent analysis on historical data, performing verification and feature recognition on fault period data by establishing a probability model of a normal working condition, and generating a diagnosis analysis report. According to the method, the interference source can be accurately separated and positioned, the transient fault is automatically captured, objective and intelligent fault diagnosis is provided, and the efficiency and reliability of track circuit troubleshooting are remarkably improved.

The present invention discloses a cable status assessment method, device, and non-volatile storage medium. The method comprises: constructing a fault arc model and a line model corresponding to a target cable; generating a simulation waveform based on the fault arc model and the line model; determining target fault parameters based on the measured waveform and the simulation waveform at the fault point in the target cable, wherein the target fault parameters represent indicator data describing the fault characteristics and status; determining the waveform characteristics of the fault point based on the target fault parameters; and determining the target cable status assessment result based on the waveform characteristics. The present invention solves the current technical problem of difficulty in sensitively capturing and accurately assessing early-stage faults in cable equipment, particularly transient fault characteristics, resulting in inaccurate cable assessments.

The invention discloses a high-temperature superconducting cable equivalent analysis method, a high-temperature superconducting cable equivalent analysis system, a medium and electronic equipment, and relates to the technical field of power devices and superconducting power transmission. Constructing a first equivalent circuit model based on the structural characteristic parameter set, and performing cross generality screening on the material parameters by adopting a multi-factor influence separation method to obtain a first equivalent parameter set; constructing a first coupling model based on the first equivalent parameter set, and applying disturbance signals of different frequencies to perform fault simulation to obtain a working condition equivalent model; extracting transient response data based on the working condition equivalent model, and identifying transient quenching response characteristics of the high-temperature superconducting cable based on the transient response data; according to the method, a multi-objective optimization function is constructed based on transient quench response characteristics, control parameters are optimized by adopting an NSGA-III algorithm, an optimal control strategy is obtained, and the problems of high quench expansion risk and difficulty in timely regulation and control of the high-temperature superconducting cable under a transient fault are solved.

A method for managing a plurality of imaging devices in a vehicle includes determining that a change of data security mode is indicated for frames of image data transmitted over a first data communication link, determining whether a sensor management system has sufficient processing capacity to support the change of data security mode, increasing the processing capacity of the sensor management system by modifying data security settings for at least one other data communication link when the processing capacity of the sensor management system is insufficient to support the change of data security mode, and initiating the change of data security mode when the sensor management system has sufficient processing capacity to support the change of data security mode. The change of data security mode may include a change from an application-based to a link-based data security mode or a change from the link-based to the application-based data security mode.

The present application belongs to the field of rail transit signal technology, and specifically relates to a rail circuit interference test analysis method, system and device, aiming to solve the problems of difficult accurate positioning of mixed interference sources, inability to capture occasional faults and subjective diagnosis. The present application comprises: multi-channel synchronous acquisition and real-time storage of voltage signals and current signals of the rail circuit; real-time processing of the original signals, analysis of different frequency components through high-resolution spectrum analysis, comparison with a preset threshold to trigger an alarm and generate a real-time analysis report in combination with time domain analysis; intelligent analysis of historical data, verification and feature recognition of fault period data through establishment of a probability model of normal working conditions to generate a diagnostic analysis report. The present application can realize accurate separation and positioning of interference sources, automatically capture transient faults, and provide objective and intelligent fault diagnosis, significantly improving the efficiency and reliability of rail circuit fault troubleshooting.

The application relates to a method for reconstructing and fusing an angle-of-attack signal, which comprises the following steps: reconstructing an inertial angle-of-attack estimation value according to first inertial data; performing transient fault judgment and steady-state fault judgment by using an effective measured angle-of-attack signal and the inertial angle-of-attack estimation value, screening a non-fault measured angle-of-attack signal according to the transient fault judgment result and the steady-state fault judgment result, and performing primary monitoring voting by using the non-fault measured angle-of-attack signal to obtain a primary voting state and a primary voting value; if the primary voting state is a non-singular state, the primary voting value is taken as a first angle-of-attack voting output value; if the primary voting state is a singular state, secondary monitoring voting is performed by using the inertial angle-of-attack estimation value and the non-fault measured angle-of-attack signal to obtain a secondary voting state and a second angle-of-attack voting output value; and a precise angle-of-attack fusion signal is reconstructed according to any one of the first angle-of-attack voting output value and the second angle-of-attack voting output value and an inertial angle-of-attack rate signal, so as to be used by an aircraft.

An energy storage power generation system and a control method thereof. When a transient fault occurs in the power grid, the plurality of power conversion systems may enter a transient-state operating mode from a steady-state operating mode, and a parallel expansion multiple of the energy storage power generation system is less than a transient overload multiple. In embodiments, a physical characteristic of transient overloading and a short-time overload capability of the power conversion system are fully used, and the power grid is supported when a power grid fault is detected. This solution simplifies an architecture of the system and increases efficiency of the system. It is easy to understand that because a quantity of power conversion systems is reduced and costs of the system are also reduced.

A diagnostic system for a high-power laser system that detects and responds to malfunctions in the interlock of a laser safety system. When a fault is detected in any of the interlock circuits, the operating conditions of the laser are restricted or even shut down. To distinguish between typical transient faults caused by ambient conditions and persistent faults caused by a failed component or circuit that require external intervention for repair, the system uses a database of possible fault classifications to determine the likely type of fault. If the fault is likely to be transient, the laser is maintained in a reduced-power state until one or more temporary interlocks are applied as a backup for the failed interlock. The system can be repeatedly tested at full-power output for fault correction. Once recovered from a fault, the backup interlock can be disabled and the system returned to full operation.

The application relates to a high-performance bus transmission security guarantee method and system, which comprises a bus security unit, a host, a slave and a bus matrix group composed of multiple bus matrices; the bus security unit is connected between the host and the slave; the bus security unit uses a transmission time length counting module to perform error monitoring; the decoded slave port number is compared with a preconfigured slave port number to determine whether a slave port error occurs; and error processing at an operating system layer or a bus controller layer is performed when the error occurs. The application can independently act on the bus and the bus matrix group mechanism, can find loss or timeout error in the bus transmission process caused by register transient failure or abnormal flip of the register in a transparent manner of the bus, the host and the slave, can be independently mounted and used or integrated with the bus, has high flexibility and less additional hardware and software overhead.

The application discloses an online electric leakage detection and early warning module for outdoor line poles and relates to the technical field of power line monitoring. The module comprises a current collection unit, a signal conditioning unit, an environment sensing unit and a main control processing unit. An adaptive threshold calculation submodule and a dynamic sampling scheduling submodule are arranged in the main control processing unit. The adaptive threshold calculation submodule divides the environment into bins according to temperature and humidity, constructs a robust baseline with a median and an absolute deviation of the median, and generates a dynamic alarm threshold. The dynamic sampling scheduling submodule divides the operation into five states, i.e., deep sleep, fast scanning, monitoring, intensive capture and alarm confirmation, and the transition is driven by the dynamic threshold and the signal trend. The two submodules are coordinated through a sample bucket permission flag, the data during the fault period is prohibited from being backfilled into the baseline, and closed-loop purification is realized. The application takes into account low false alarm, high sensitivity and transient fault capture capability, and does not significantly increase power consumption.

This invention provides a method for optimizing a distributed system leader selection strategy, belonging to the field of distributed computing technology. The method optimizes the distributed system leader selection strategy in terms of robustness and stability. By assessing the state of network links between nodes and adopting different leader selection methods, the leader selection strategy improves the distributed system's fault tolerance to transient and catastrophic failures.

The invention discloses a cable state evaluation method and device and a nonvolatile storage medium. The method comprises the following steps: constructing a fault arc model and a line model corresponding to a target cable; generating a simulation waveform based on the fault arc model and the line model; target fault parameters are determined based on the actual measurement waveform and the simulation waveform of the fault point in the target cable, and the target fault parameters represent index data describing fault characteristics and states; determining waveform characteristics of the fault point according to the target fault parameter; and determining a state evaluation result of the target cable based on the waveform characteristics. The technical problem that cable assessment is not accurate enough due to the fact that early faults, especially transient fault features, of cable equipment are difficult to sensitively capture and accurately assess at present is solved.

A method for managing a plurality of imaging devices in a vehicle includes determining that a change of data security mode is indicated for frames of image data transmitted over a first data communication link, determining whether a sensor management system has sufficient processing capacity to support the change of data security mode, increasing the processing capacity of the sensor management system by modifying data security settings for at least one other data communication link when the processing capacity of the sensor management system is insufficient to support the change of data security mode, and initiating the change of data security mode when the sensor management system has sufficient processing capacity to support the change of data security mode. The change of data security mode may include a change from an application-based to a link-based data security mode or a change from the link-based to the application-based data security mode.

Various embodiments of the present disclosure relate to managing transient faults within storage elements, and in particular, to maintaining the integrity of data stored in memory (109). In one example embodiment, a technique for performing a data integrity process (200) is provided. The technique first includes accessing address data stored in a first location (111) in memory (109) such that the address data is indicative of a second location (113) in memory (109). The technique then includes accessing data stored in the second location (113) in memory (109) and generating a data integrity value based on the accessed data. Once generated, the technique includes performing a comparison between the data integrity value and a reference value associated with the accessed data. If the comparison shows the data integrity value matches the reference value, then the technique includes outputting a positive indication. Else, the technique includes outputting a negative indication.

A method includes detecting a functional safety fault and determining whether the functional safety fault is a transient fault or a permanent fault. The method further includes identifying a scalable block of a processing unit from which the functional safety fault occurred in response to the functional safety fault being determined to be a permanent fault. The method optionally includes power collapsing the scalable block. The method also includes notifying a scheduler to prevent the scheduler from scheduling future workloads to the scalable block.

The invention provides a fault detection method and device in a network-on-chip, equipment and a storage medium, and the method comprises the steps: carrying out the retransmission processing based on an error event signal if the error event signal is received, and carrying out the fault detection based on the error event signal and a retransmission processing result. Updating the state of the counter corresponding to the error event signal; if the state of the counter reaches a fault question condition, generating a detection data packet, and detecting an error event corresponding to the error event signal based on the detection data packet to obtain a corresponding detection result; if the detection result shows that the error event passes the detection, determining that the target fault type of the error event is a transient fault; and if the detection result shows that the error event does not pass the detection, determining that the target fault type of the error event is a permanent fault. Through the technical scheme provided by the invention, a dynamic evaluation system based on a counter and a permanent fault questioning mechanism is realized, and the misjudgment rate of transient faults and permanent faults can be remarkably reduced.

The present invention discloses a mechanical transient fault diagnosis method and device based on group delay ridge optimization, belonging to the technical field of intelligent mechanical fault diagnosis, and is used to solve the technical problems that the existing vibration signal processing methods are difficult to extract the transient signal features from the vibration signals with complex components, are easily affected by interference, and have a low fault diagnosis accuracy. The method includes: performing time-frequency transformation and phase modulation wavelet transformation on the vibration signal to obtain the corresponding time-frequency transformation result; extracting the group delay ridge of the first mode in the vibration signal; performing group delay band filtering on the group delay ridge to obtain the optimized group delay ridge; removing the time-frequency coefficients corresponding to the optimized group delay ridge, iteratively extracting the group delay ridge of the second mode, and optimizing the ridge line of the searched group delay ridge until the group delay ridge of each mode is obtained; obtaining the optimized time-frequency transformation result according to the group delay ridge of each mode, and performing mechanical transient fault diagnosis.

The present specification provides a data processing method and device, a computing device, a computer readable storage medium and a program product, which are applied to a video processing device deployed on a target vehicle, and the method comprises the following steps: in the case that a target event of the target vehicle is detected, writing the target event, an event occurrence time corresponding to the target event and an event state into an event registry, the event state being used to identify a protection state of the target event; obtaining an event to be processed with the event state in an unprotected state from the event registry, and obtaining a video recording of a target period according to the event occurrence time corresponding to the event to be processed, in the case that the video recording is obtained, performing content verification on the video recording to obtain a verification result; in the case that the video recording contains the event to be processed, locking the video recording, and updating the event state of the event to be processed to a protected state; a remedy opportunity is provided for the locking mechanism, and the risk of video loss caused by transient failure is greatly reduced.

The present application relates to the technical field of power equipment state monitoring and fault diagnosis, in particular to a vacuum circuit breaker fault detection method and system based on deep fusion perception, which responds to a preset operation instruction, synchronously acquires an electrical control loop transient current signal, a main loop transient voltage drop signal and an envelope signal of a high-frequency electromagnetic field of a near-field space of an arc extinguishing chamber, and constructs a multi-dimensional state matrix; based on an electromechanical coupling energy admittance operator containing an energy conversion coefficient and an admittance matrix, phase space reconstruction is carried out, transient energy flow rate is calculated, and a transient energy trajectory in a three-dimensional energy phase space is generated; the transient energy trajectory is compared with a health state energy manifold, an orthogonal projection residual vector is calculated, and a specific fault type is determined, a quantitative diagnosis report is generated or the health state energy manifold is updated, and the present application realizes interpretable identification of vacuum circuit breaker opening and closing transient faults and improves anti-interference capability.

The invention relates to the technical field of equipment acoustic state monitoring and fault diagnosis, in particular to a compressed garbage truck fault judgment method and system based on voiceprint recognition. Comprising the steps of synchronously obtaining an audio signal, real-time working condition data and an action instruction of a vehicle, and performing adaptive noise reduction on the audio signal by using the working condition data; then double-path diagnosis is performed on the noise-reduced signals in parallel, systematic relevance faults in one path are diagnosed through causal time sequence analysis, and early transient faults of components in the other path are diagnosed through auto-encoder reconstruction error analysis; and finally, giving an alarm according to the diagnosis result of any path. According to the method, the working condition self-adaptive noise reduction and the double-path parallel diagnosis model are fused, so that the problems of low diagnosis accuracy and single fault identification type under strong interference and variable working conditions in the prior art are solved, and comprehensive and accurate diagnosis of systematic associated faults and early transient faults is realized.

The invention relates to the technical field of transformer detection, and provides a small control rectifier transformer on-line monitoring method, which comprises the following steps: step 1, collecting an on-off state signal of a high-breaking small circuit breaker in real time, and carrying out hardware filtering and software anti-shake processing; step 2, synchronously acquiring an alternating current input voltage signal and a direct current output voltage signal of the small control rectifier transformer; 3, transmitting the acquired signal to a local monitoring device through a control cable with the cross section area of 1.5 mm < 2 >; 4, AC / DC conversion and low-pass filtering are carried out on the voltage signals in the local monitoring device, and interference signals with the frequency higher than 50 Hz are filtered out. The rectifier bridge fault is accurately positioned by associating the opening and closing time sequence of the circuit breaker with the voltage fluctuation characteristics, and the misjudgment rate is reduced from 15% to lt; 1.2%, the duration time lt cannot be captured by manual inspection; for 5-second transient faults, the system can early warn breakdown of the rectifier tube 2 hours in advance, and hidden dangers can be found 14 days in advance compared with a traditional method.

The present application relates to the technical field of intelligent maintenance of refrigeration equipment, in particular to a kind of intelligent maintenance system of refrigeration equipment based on digital twinning;Contain working condition perception, twin model management, stress fault decoupling, transient fault diagnosis, maintenance risk decision and closed-loop control execution unit;System determines transient disturbance index through working condition perception, and dynamically constructs twin model;Its core is to decouple out fault deviation index using dynamic stress baseline model, and diagnose fault occurrence likelihood under specific working condition, and then weighted fusion into comprehensive maintenance risk index;System executes performance optimization, life extension with disease or safety protection strategy according to risk level;The present application realizes the effective distinction of severe working condition disturbance and early fault by dynamic stress baseline model, reduces false alarm and false negative under high load.

Disclosed herein is a self-timed memory circuit with a bypass mode for testing output shadow logic. The circuit is applicable to various memory types, including ROM, HistoRAM, and TCAM. In normal operation, the memory array outputs data through sense amplifiers and latches, controlled by self-timing circuitry. The output then passes through shadow logic for additional processing. The bypass mode allows direct testing of the shadow logic by inputting test patterns (address bits or search keys) that bypass the memory array. These test signals use the same self-timing mechanisms as normal operations, providing for accurate timing representation. This approach enhances fault coverage for shadow logic, enabling detection of transient faults and at-speed errors that might be missed by conventional static testing.

The invention belongs to the field of fault early warning, particularly relates to a real-time fault early warning method and system for a labyrinth piston compressor, and aims to solve the technical problems that an existing deep learning model is insufficient in sensitivity to transient faults, and hyper-parameter optimization is prone to falling into local optimum. The early warning method comprises the following steps: S1, acquiring multi-source time sequence monitoring data, and performing normalization processing to form an input feature vector sequence; s2, constructing a time sequence feature extraction network; s3, optimizing the parameters of the network by using a partition collaborative zebra optimization algorithm; and S4, using the optimized time sequence feature extraction network to process the monitoring data in real time, outputting a fault probability sequence, and generating an early warning signal when a continuous value in the sequence is higher than an early warning threshold within a specified time length. The balance between global search and local search is realized, local optimum can be jumped out, and full optimization of parameters is ensured.

The application provides a controller redundancy bus health degree evaluation method and device, equipment and a storage medium. The method comprises the following steps: obtaining a link error rate and a signal-to-noise ratio from a physical layer chip; capturing a transient signal of a physical layer chip state pin by a field programmable gate array logic in a controller to generate a transient fault event; counting the number of transient fault events in a set sliding time window to determine a transient disturbance deduction value; determining an error code degradation deduction value and a physical signal deduction value according to the error rate and the signal-to-noise ratio; and finally determining a link performance integrity score based on a preset reference score minus the three deduction values. The method overcomes the deficiency of binary logic that cannot prewarn performance gradual change, can identify and grade the prewarning link performance degradation state in advance, and overcomes the long software polling sampling period by using the field programmable gate array logic to capture the microsecond-level transient signal, so that the transient fault can be accurately perceived and quantitatively counted.