374 results about "Noise estimation" patented technology

The invention discloses a weak light image enhancement method fusing noise adaptive diffusion and illumination perception, and the method comprises the steps: firstly designing a reflection-illumination decomposition module RID based on a Retinex theory, and extracting a reflectivity component and an illumination component of an input weak light image; then designing an ADRD (adaptive diffusion reflection denoising) module, performing denoising enhancement on the reflectivity component, and outputting an enhanced reflectivity image; introducing a noise estimation network, and dynamically adjusting the de-noising amplitude of the diffusion model according to the noise intensity of the region in the reflectivity graph; designing an illumination perception enhancement module IEM, fusing an attention mechanism and a local enhancement block, enhancing the illumination image, and outputting an enhanced illumination component; and building a complete neural network framework, carrying out joint training on the provided module, finally testing the stored neural network model, and outputting an enhanced image. According to the method, the problems of detail loss, noise residue and uneven illumination of the enhanced image in the prior art are solved.

The invention discloses a bimodal neural network and spectral subtraction combined underwater acoustic signal noise suppression method. Comprising the following steps: firstly, constructing a simulation underwater sound data set containing self-noise; thirdly, constructing a bimodal neural network, then training the bimodal neural network until training is completed, and obtaining a platform self-noise estimation model; inputting a to-be-processed noise-containing underwater acoustic signal into the platform self-noise estimation model, and outputting estimation platform self-noise by the model; and finally, based on the self noise of the estimation platform, noise reduction processing is carried out on the noise-containing underwater acoustic signal to be processed by using the improved spectral subtraction method, and then a noise-reduced underwater acoustic signal is obtained. The method combines an advanced deep learning method and a classical spectral subtraction algorithm, has the capabilities of autonomous learning and efficient noise reduction, remarkably improves the signal-to-noise ratio of the underwater acoustic signal, is suitable for noise reduction of the underwater acoustic signal in a non-stationary and complex marine environment, remarkably improves the low-frequency noise suppression capability and the target signal fidelity, and has a good application prospect. The method is suitable for underwater acoustic target detection, underwater acoustic communication and other scenes.

According to the VLA-based body robot SLAM method and device and the storage medium, a VLA large model is introduced on the basis of multi-modal fusion SLAM of traditional point cloud geometry, vision and the like, perception is improved from a geometric layer to semantic concept alignment, and the SLAM is more accurate. A VLA large model is used for carrying out dynamic prediction updating on dynamic interference filtering, key frame screening, factor graph relation construction, noise estimation, loopback detection and the like, the real-time requirement is met in the modes of incremental optimization and the like, and the dislocation problem of geometric constraints is corrected through global semantic constraints. The stability of the robot SLAM in extreme scenes such as excessive environmental dynamic interference, loud sensor noise and environmental degradation is improved, and the constructed hierarchical situation map can meet the requirement of a high-order navigation task while the geometric accuracy is met, so that the robot SLAM can be deployed to carriers such as a body-equipped intelligent carrier for subsequent application.

The invention discloses a combined navigation method and system of an unmanned surface vehicle. The method comprises the following steps: forming a GNSS (Global Navigation Satellite System) / INS (Inertial Navigation System) integrated navigation system by using a GNSS (Global Navigation Satellite System) and a strapdown inertial navigation system (INS), and establishing a mathematical model of a GNSS / INS integrated navigation system filter; the mathematical model comprises a state equation and a measurement equation; establishing a mathematical model of the influence of the GNSS auxiliary information on the GNSS positioning precision so as to preliminarily adjust the measurement noise in the measurement equation; through an improved Sage-Husa adaptive filtering algorithm, adaptive estimation is carried out on the preliminarily adjusted measurement noise, and a measurement noise estimation final value is obtained; and according to the motion characteristics of the unmanned surface vehicle, adding motion constraint conditions to the measurement equation. The GNSS auxiliary information mathematical model based on multivariate function fitting is established, the influence of the external environment on the positioning precision is objectively reflected, the measurement noise in the filter is dynamically adjusted, and the positioning precision of the integrated navigation system under the interference condition is remarkably improved.

The invention belongs to the field of medical image processing and radiotherapy quality control, particularly relates to a gamma distribution diagram calculation method based on a diffusion model, and aims to solve the problem that the traditional radiotherapy quality guarantee efficiency is low. The method includes deriving a field flux profile image from a radiotherapy planning system. A reverse process noise estimation network is improved based on a conditional diffusion model, a field flux distribution diagram image is taken as conditional input, field flux distribution diagram information is extracted layer by layer at an encoder part, information fusion with noise path coding is carried out at different coding scales, diffusion noise is predicted by adopting multi-scale fusion Unet, and the prediction precision is improved. And constructing to obtain a gamma distribution diagram generation model. A dual-path residual block is adopted as a basic module of an encoder and a decoder of the multi-scale fusion Unet, a moving window jump connection module is adopted to integrate global and local features of different stages, and the moving window jump connection module introduces spatial offset through a moving window mechanism.

The invention relates to the technical field of inertial navigation and sensor fusion, in particular to an IMU (inertial measurement unit) attitude estimation and error correction method based on a state space physical information neural network, which comprises the following steps: acquiring original data of an IMU and preprocessing; constructing a state space model, and designing a state transition physical information neural network based on the state space model; training the state transition physical information neural network based on the preprocessed original data, optimizing network parameters through a joint loss function in the training process, and obtaining the trained state transition physical information neural network; and collecting real-time data streams of the IMU, inputting the real-time data streams into the trained state transition physical information neural network, and outputting the corrected pose, position and speed. According to the method, physical constraints and adaptive noise estimation are fused, so that the attitude estimation precision and the error correction capability in a dynamic complex environment are remarkably improved.

The invention discloses an adaptive edge detection iterative denoising point cloud reconstruction method and system. A regularization parameter and a kernel bandwidth are automatically set through point cloud normalization and local covariance noise estimation; an implicit curved surface is fitted based on a parameterized Gaussian field, and initial curved surface construction without a normal direction is realized. Edge detection is carried out by utilizing Voronoi covariance measurement, and the edge detection is continuously mapped into a projection weight, so that feature details of the point cloud are reserved in an acute angle region, and smooth denoising is realized in a flat region. The regularization intensity is dynamically adjusted through residual trend analysis to enhance detail representation, and a triangular mesh is extracted and output in combination with octree discretization and contour surface extraction. The method has unsupervised adaptivity, has outstanding performance in the aspects of edge fidelity, noise robustness and complex structure adaptability, can effectively process point cloud data with high noise, missing normal direction or irregular structure, and is suitable for the fields of engineering survey, reverse modeling, cultural relic digitization and the like.

A label noise estimation method based on a manifold regularization transfer matrix provided by the present invention pre-trains a first network in a second network, and after distilling a data set, inputs the obtained sub-data set into the second network to obtain the probability of the class to which the data instances in the sub-data set belong and obtain a transfer matrix related to the data instances; further calculates the cross-entropy loss of the second network according to the data instance labels, and combines an association matrix expressing the consistency of the data instances belonging to the same manifold and a penalty matrix of the data instances belonging to different manifolds to calculate the loss function of the second network; adjusts the loss function to reduce the training of the second network to obtain a trained second network, thereby completing the estimation of the class to which the data instances belong. The present invention can reduce the estimation error without affecting the approximation error of the transfer matrix, and experiments prove that the present invention can achieve excellent performance in label noise learning.

The invention relates to the technical field of cable force detection, in particular to a bridge inhaul cable fundamental frequency identification method, device and equipment, a storage medium and a product, vibration acceleration data of a bridge inhaul cable structure to be monitored in the duration time is converted into a power spectrum data set, a noise floor is calculated through the power spectrum data set, the noise estimation precision is improved, and the noise estimation accuracy is improved. Energy peak value screening is carried out on the power spectrum data, part of energy peak value data is screened out, a frequency-energy peak value array is obtained, energy evaluation and scoring are carried out on the frequency-energy peak value array and a predetermined candidate fundamental frequency through a preset fundamental frequency scoring model, and the energy evaluation and scoring precision of the candidate frequency is improved; finally, the actual fundamental frequency of the to-be-detected inhaul cable is determined through the score value of the candidate fundamental frequency, manual screening is not needed, the identification efficiency is improved, and meanwhile high-precision identification of the fundamental frequency of the inhaul cable is achieved.

The invention provides an inertia / satellite / vision adaptive integrated navigation method and system. The method comprises the following steps: carrying out inertia measurement and navigation calculation to obtain inertia data; calculating satellite navigation observed quantity according to the satellite navigation data and the inertial data, and constructing a satellite observation model; calculating visual navigation observed quantity according to the visual navigation data and the inertial data, and constructing a visual observation model; aiming at a satellite and a visual observation model, respectively adopting an innovation-based adaptive covariance estimation method to obtain satellite and visual observation noise covariance updated values; constructing a satellite and visual navigation health degree, and calculating a satellite and visual fusion weight according to the satellite and visual navigation health degree; controlling updating of satellite and visual navigation observed quantity according to the satellite and visual fusion weight; and calculating a weighted equivalent observation matrix and a noise covariance, and carrying out filtering estimation. According to the method, an adaptive noise estimation and sensor health degree evaluation mechanism is introduced, dynamic weighted fusion of multi-sensor data is realized, and the robustness and precision of a navigation system in complex environments such as satellite signal lock losing and visual feature missing are improved.

The invention relates to the technical field of navigation positioning, and discloses a satellite positioning method and device based on deep learning and filter coupling driving, and a medium. Determining a coarse positioning result of the receiver based on a least square method by using an observation pseudo-range between the receiver and each satellite and a model pseudo-range between the receiver and each satellite obtained by modeling; extracting observation quality features based on a coarse positioning result; inputting the observation quality features into a noise estimation model obtained based on deep learning to obtain a measurement noise covariance matrix and a noise compensation value; determining a state vector of a filter at an initial moment based on the coarse positioning result, and updating the state vector of the filter step by step based on the measurement noise covariance matrix and the noise compensation value to obtain a state vector at a to-be-estimated moment, the state vector at the to-be-estimated moment comprising a positioning result of the receiver at the to-be-estimated moment; noise and errors in the environment can be effectively compensated, so that the influence of the noise and the errors is effectively reduced, and the accuracy of satellite positioning is improved.

The invention discloses a semantic constraint adversarial sample generation method and system. According to the method, firstly, a confrontation sample generation task based on a natural language instruction is constructed, and parameters are initialized; then deploying a proxy model and a diffusion model for double-branch noise estimation; by judging instruction complexity, mask guidance is selectively adopted to realize natural constraints of spatial differentiation; by constructing a residual-guided antagonistic DDIM sampler and combining an adaptive optimization iterative algorithm, the calculation complexity is reduced, and the attack mobility is enhanced at the same time; and aiming at a three-dimensional generation requirement, a three-dimensional Gaussian sputtering rendering model is further integrated, and geometric consistency is ensured through multi-view gradient averaging. According to the method, the problems of inaccurate semantic control, weak migration aggressiveness, poor three-dimensional generation consistency and the like in the prior art are effectively solved, the attack success rate and the visual naturalness are remarkably improved on multiple target models, and an efficient and reliable red team test tool is provided for security evaluation and alignment of a multi-modal large model.

The invention discloses an underwater acoustic OFDM impulse noise estimation enhancement method based on distributed compressed sensing, and relates to the technical field of underwater acoustic communication. Carrying out frequency offset correction on the received OFDM signal by adopting a plurality of carrier frequency offset compensation values to obtain a plurality of groups of related signals; constructing an orthogonal projection matrix, projecting a received signal to a specific orthogonal subspace to eliminate channel components, and separating impulse noise; constructing a joint observation matrix by using the time domain sparsity of the impulse noise and the strong correlation under different carrier frequency offset compensation; and carrying out joint sparse reconstruction on the multiple groups of observation signals by adopting a distributed compressed sensing algorithm, and estimating an impulse noise time domain signal. A distributed compressed sensing algorithm is adopted, two characteristics of impulse noise are utilized, impulse noise estimation accuracy is improved, an impulse noise estimation effect is enhanced, and the problem that impulse noise estimation accuracy is limited under the condition of limited pilot frequency quantity is solved.

The invention provides a non-uniform haze degraded image restoration method and a related device, and belongs to the technical field of image processing. The method comprises the following steps: estimating noise randomly sampled from standard normal distribution by using a trained noise estimator to obtain estimated noise, and removing the estimated noise from the noise randomly sampled from the standard normal distribution to obtain a noisy image; constructing a visual state space mixed scale expansion convolution module, and constructing a conditional diffusion U-shaped denoising model based on the visual state space mixed scale expansion convolution module; and based on the guide image, estimating and denoising the noisy image by using a conditional diffusion U-shaped denoising model in an iterative calculation mode to obtain a restored non-uniform haze degraded image. According to the method, the problem that the restoration sharpness degree of the degraded image is poor when the haze concentration change range is large or the non-uniform change is severe is solved.

The invention provides a filtering method and device for channel estimation, electronic equipment and a storage medium. The method comprises the following steps: acquiring initial channel estimation of a reference signal, and determining optimal noise power in a current target channel scene based on the initial channel estimation; performing first-stage Wiener filtering on the initial channel estimation to obtain first filtering channel estimation; and performing second-stage Wiener filtering on the first filtering channel estimation based on the optimal noise power to obtain second filtering channel estimation. Therefore, according to the scheme, the optimal noise power in the target channel scene is acquired in advance, so that the second-stage Wiener filtering can be immediately carried out after the first-stage Wiener filtering is completed, the process of carrying out noise estimation on the reference signal after the first-stage filtering can be omitted, the processing waiting time is reduced, and the processing efficiency is improved. And the processing time delay is reduced, so that the two-stage filter circuit can be designed in a tight coupling manner to enhance the stability of the filter performance.

The invention provides a robot action generation method and a robot control system, and the method comprises the steps: obtaining multi-modal observation data at a current moment; the modal weight and the initial noise trajectory of each modal are acquired; and according to the multi-modal observation data, the modal weight of each modal and the noise estimation model corresponding to each modal, performing iterative exploration on the initial noise trajectory according to a time inverse sequence, and generating an action trajectory sequence of the robot. According to the method, noise estimation of the pre-trained single-mode diffusion strategy can be combined during reasoning, and information of different modes can be efficiently fused, so that on the premise of avoiding complexity of multi-mode data collection and joint training, multi-mode strategy fusion is realized, and meanwhile, the multi-mode data collection and joint training efficiency is improved. And the flexibility, the real-time adaptability, the robustness and the expandability of the action generation process are enhanced. Moreover, by avoiding multi-modal joint training, the training cost and the computing resource demand are greatly reduced.

The invention provides an image noise reduction method, which comprises the following steps of: estimating a filtering radius and a regularization parameter of a guiding filtering processing module by using a guiding filtering estimation convolutional neural network, and after an estimation value is obtained, filtering an input image by the guiding filtering processing module according to the estimated filtering radius and the regularization parameter, decomposing the input image into a base layer and a detail layer according to a guide filtering processing result; the base layer comprises low-frequency information and a rough contour of an image, and the detail layer comprises high-frequency information including noise; performing noise estimation on the detail layer by using a noise estimation convolutional neural network to obtain noise, and removing the noise in the detail layer to obtain a noise-removed detail layer; and re-fusing the base layer and the de-noised detail layer to obtain a de-noised output image. The invention further provides an image de-noising device.

The invention discloses an image generation model training method and device and an image generation method and device, and the training method comprises the steps: obtaining a training data set, and carrying out the training of a generated image generation model; the training process comprises the following steps: respectively carrying out pixel feature extraction and semantic feature extraction on an original image; carrying out image feature extraction on the target image, and carrying out noise processing on the extracted image features to obtain noise features; performing noise estimation and de-noising processing on the noise features based on the pixel features of the original image, the semantic features of the original image and the guidance of the text description, and performing image restoration on the result features obtained by the de-noising processing to obtain a generated image; and updating parameters of pixel feature extraction, semantic feature extraction, noise estimation and de-noising processing based on a comparison result of the generated image and the target image, so that the generated image is closer to the target image. By applying the method and the device, the image generation model suitable for various scenes can be provided, and the high-quality image meeting user requirements can be generated.

The invention provides a mobile traffic prediction method and device based on a diffusion model, and relates to the technical field of mobile traffic prediction.The method comprises the steps that on the basis of obtained historical mobile traffic, noise mobile traffic and dynamic characteristics of the historical mobile traffic are determined, and the noise mobile traffic is the mobile traffic added with noise; the noise priori estimation unit based on the diffusion model is used for carrying out noise estimation on the noise movement flow and the dynamic characteristics to obtain noise priori, and carrying out noise prediction on the noise movement flow based on a denoising network of the diffusion model to obtain residual noise; and performing flow prediction according to the noise prior, the residual noise and the noise moving flow to obtain future moving flow. According to the invention, the accuracy of mobile traffic prediction can be improved.

The invention relates to a fixed parameter optimization cubature Kalman filtering tracking method for a high-speed high-maneuvering target, belongs to the technical field of signal processing and target tracking, and aims to solve the problem of insufficient tracking performance caused by difficulty in parameter tuning and isolation of an improved mechanism when an existing method is used for coexistence of model mismatch, noise time variation and outlier interference. According to the scheme, a framework integrating off-line multi-parameter collaborative optimization and on-line multi-mechanism adaptive filtering is constructed; in the off-line stage, an optimal combination of key parameters such as covariance adjustment factors is determined through a grid search system; in the online stage, the combination is loaded, and a complete filtering process including innovation feedback type dynamic covariance adjustment, sliding window type noise estimation and outlier suppression and trace-related adaptive regularization is executed, so that an enhanced tracking method with active pre-judgment and closed-loop learning capabilities is formed. The method is mainly used for carrying out high-precision and high-robustness real-time state estimation on the high-speed high-maneuvering target.

A distributed ultra-wide band (UWB) radar system and methods for operating the same are disclosed. The distribute radar system uses a plurality of separate UWB radios or nodes that do not use a centralized clock or source of time. However, the distributed UWB system operates to provide radar-like functionality and fine-grain sensing capabilities through synchronization based on line-of-sight (LOS) signal processing and noise estimations. Synchronized channel impulse responses (CIRs) can be processed for general object detection and tracking, gesture recognition, or even micro-motions such as monitoring vitals

The invention relates to an underwater electromagnetic detection noise suppression method based on an NARX neural network, and the method comprises the steps: collecting first magnetic field data through a first vector magnetic sensor, and collecting second magnetic field data through a second vector magnetic sensor; training a sea wave noise prediction model based on the first magnetic field data and the second magnetic field data, and repeatedly and synchronously intercepting the first magnetic field data and the second magnetic field data in a preset time range through a sliding window, inputting the intercepted first magnetic field data and the intercepted second magnetic field data into the sea wave noise prediction model for prediction to obtain a corresponding sea wave noise prediction value; and performing differential processing on the first magnetic field data in each sliding window and the sea wave noise prediction value in the corresponding preset time range, and splicing differential results to obtain secondary field information in the first magnetic field data. According to the invention, the accuracy of noise estimation is improved, and the background interference in the signal can be better stripped.

The invention discloses a tablet computer real-time speech recognition and translation system based on side cloud collaboration, which relates to the technical field of speech processing, and comprises a speech noise reduction module for performing multi-stage enhancement by adopting beam forming and a deep residual network, performing multi-channel feature fusion in combination with adaptive noise estimation and an attention mechanism, and performing speech recognition and translation. Obtaining clean voice data after signal-to-noise ratio optimization; the language recognition module inputs the clean voice data into a language recognition network, extracts a voice feature vector, performs language recognition through a language clustering model and generates a language tag; and the translation module is used for carrying out semantic optimization through semantic understanding and context modeling according to the preliminary recognition text, and carrying out translation processing by utilizing a neural network translation model to generate a translated text. According to the invention, the technical effect of effectively improving the signal-to-noise ratio of the voice signal in a complex acoustic environment is realized.

The invention provides a multi-redundancy gyroscope weighted fusion method and device based on real-time noise estimation, and relates to the technical field of inertial navigation and multi-sensor fusion. The method comprises the following steps: firstly, carrying out sliding window sampling and multi-scale wavelet decomposition on measurement signals of a plurality of redundant gyroscopes, and extracting wavelet coefficients under different frequency scales; then, applying a noise variance estimation method based on mutual difference observation on each scale, and estimating the noise intensity of each channel in real time; and finally, constructing a fusion weight according to a minimum variance criterion, and realizing weighted fusion of redundant signals and signal output of the virtual gyroscope. The system is simple in structure and efficient in calculation, can improve the measurement precision and robustness of an inertial navigation system in a dynamic environment, and is suitable for an embedded high-precision navigation system in a dynamic complex working condition.

The invention provides a high-throughput Raman spectrum-oriented identification method, and belongs to the technical field of Raman spectrum data processing. According to the method, the number of principal components is dynamically determined through the adaptive feature contribution rate and the noise estimation algorithm, flexible compression for different spectral complexity is achieved, and the operation efficiency in large-batch data processing is remarkably improved; on this basis, a lightweight convolutional neural network model introducing a channel attention mechanism is constructed to enhance the response ability to a key Raman peak position and suppress background interference; and meanwhile, an auxiliary loss function based on inter-spectrum cosine similarity constraint is introduced in the training process, the intra-class consistency and the inter-class separation degree are improved, and a visual feedback mechanism is combined to optimize the region of interest of the model on a discrimination section. Compared with a traditional Raman spectrum classification method, the method does not depend on artificial feature extraction and preset dimension parameters, has the advantages of being high in discrimination, good in interpretation, wide in adaptability and the like, and can achieve efficient and accurate classification of complex Raman spectrums.

According to an embodiment, an information processing device includes one or more hardware processors configured to: generate a plurality of exogenous noise estimation values corresponding to a plurality of variables for each of one or more pieces of record data, based on a pre-update model being a structural causal model representing a causal relationship of the plurality of variables; determine whether a causal relationship of the plurality of variables represented by the one or more pieces of record data is different from the causal relationship represented by the pre-update model, based on independence between any two or more variables in the plurality of exogenous noise estimation values with respect to each of the one or more pieces of record data; and generate a post-update model being the structural causal model based on the one or more pieces of record data when determining that the causal relationships are different.

The invention discloses a gating image low-illumination enhancement method based on an improved RRDnet network, and the method comprises the steps: carrying out the processing of a collected low-illumination gating image through employing an RGRRDnet model, and obtaining an enhanced image. In RGRRDnet, firstly, an image is divided into a reflection component, a noise component and an illumination component by using a residual decomposition network; secondly, locally adjusting an illumination component by adopting a two-dimensional adaptive Gamma correction method, and improving the problem of uneven illumination of a gated image; meanwhile, the reflection component generated by the decomposition network and the reflection component obtained through calculation are fused through an adaptive weighted fusion method, and the influence of noise estimation errors is effectively reduced; and finally, introducing a detail enhancement module, and enhancing the edge and texture information of the image by using DEConv convolution operation. Experimental results show that the method is superior to a current mainstream low-illumination enhancement algorithm in the aspects of objective indexes and subjective vision on a gated image data set.

The invention relates to a dynamic light beam shaping system and method based on a spatial light modulator. The system comprises a laser light source module, a beam expanding collimation light path, a light beam modulator, a focusing optical assembly, a detection and feedback module and a control and optimization module. According to the method, the uniformity of the output flat-topped beam can be corrected by virtue of a random parallel gradient descent (SPGD) algorithm and combining a Zernike polynomial as a control variable. Meanwhile, a composite performance index comprehensively considering energy distribution and shape features is constructed, the correction process of the flat-topped beam is accelerated by adopting a mode of gradually improving Zernike polynomial orders in multiple stages, the convergence trend of the performance index is used as a judgment basis of stage switching, stage independent variable dimension expansion is implemented, and the correction precision of the flat-topped beam is improved. And the convergence speed is obviously improved. Besides, adaptive selection of disturbance amplitude and learning rate parameters in the SPGD algorithm is realized by using noise estimation and a local linearity index, and the robustness of the system to noise and environmental disturbance is enhanced.

Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may estimate phase noise using a phase noise tracking reference signal (PTRS). A network entity may transmit a PTRS waveform to the UE including a single pilot tone with a boosted transmission power that is surrounded by zero-amplitude tones based on a capability of the UE. The network entity may transmit control signaling indicating that the PTRS waveform includes the single pilot tone. Additionally, the network entity may indicate a size of the PTRS waveform, a location of the pilot tone relative to the zero-amplitude tones, and locations of the pilot tone and the zero-amplitude tones within a wireless channel. The UE may select a phase noise estimation algorithm based on the capability of the UE and the control signaling and may estimate the phase noise in accordance with the selected algorithm.

The invention discloses an inland river ship ferry whole ship equipment health monitoring and early warning system based on the Internet of Things, and relates to the technical field of ship equipment monitoring. A dynamic dual-threshold coupling mechanism is adopted, and the method comprises the steps that a noise estimation module combines a navigation state and a historical working condition library to generate a fundamental frequency floating range vector and a harmonic ratio threshold, and the problem of signal distortion caused by vibration fundamental frequency drift is solved; the collaborative analysis module constructs a three-dimensional incidence matrix of temperature gradient, envelope energy and current distortion rate, expands a harmonic ratio threshold into a dynamic window, and realizes multi-parameter synchronous out-of-limit judgment; and the health scoring module quantifies the equipment degradation degree through dynamic regular comparison of a waveform envelope line and a historical curve. And when the incidence matrix is in a continuous five-period super-dynamic window, outputting a micro-fault feature code, and mapping the micro-fault feature code to an equipment topology library in combination with the health score to generate an operation instruction. The fault recognition rate under the variable working conditions of the ship is improved, and predictive maintenance of early faults such as bearing abrasion and electric overload is supported.