35 results about "Motion boundary" patented technology

The invention discloses a permanent magnet synchronous motor joint simulation method, which comprises the following steps of: firstly, establishing a permanent magnet synchronous motor finite element model in Maxwell, and defining material nonlinear characteristics and motion boundary conditions; a motor drive control circuit is constructed in Simplorer, the finite element model is imported through a Twinbuild tool, and an electromagnetic-circuit joint simulation environment is established; creating a motor multi-body dynamic model and an external load model in Adams, and respectively exporting the motor multi-body dynamic model and the external load model into an FMU format and an Adamssub format; and finally, establishing an electromagnetic-circuit-mechanism joint simulation platform in the Simulink, and executing joint simulation. Compared with traditional joint simulation, according to the method, through electromagnetic-circuit-mechanism three-field real-time interaction, the motor can sense the load sudden change working condition, then the torque and current of the motor are rapidly adjusted through the PI controller, the problems that in engineering practice, the external load of the motor is not real, and the abnormal load is detected are solved, and the reliability of the motor is improved. And the crossing from an ideal load to an actual load is realized.

The invention provides a multi-axis cooperative shearing motion trajectory planning method and system. The method comprises the following steps: reconstructing a space-time elastic coefficient of a slave axis synchronization interval; outputting a dynamically compressed or extended synchronous window, and establishing a speed-interval nonlinear mapping rule; the kinetic energy change gradient is converted into a slave axis motion boundary constraint condition, a time-varying acceleration decision curve is generated, and motion energy distribution is made to be matched with load kinetic energy characteristics; the mechanical-control coupling parameter offset is reversely decoupled through difference feedback of the real-time motion characteristics and the virtual trajectory; and autonomously reconstructing a track to generate kernel parameters, and forming a self-digestion mechanism of a dynamic error factor. The system comprises a synchronous window output module, a constraint condition establishment module and an offset decoupling module. Under the variable acceleration working condition, the slave shaft position synchronization error is controlled, the speed synchronization precision is improved, and meanwhile the system resonance risk index is reduced; the technical bottleneck that the dynamic response and the steady-state precision cannot be obtained at the same time in the traditional follow-up shearing control is broken through.

The invention relates to the technical field of precision measurement, in particular to a method for determining a clamping posture in five-axis detection of a blade disc, a medium and equipment. Comprising the following steps: firstly, acquiring a yaw angle omega and a pitch angle phi of a probe direction required for planning a measurement path of a to-be-measured blade of a blade disc and a measurement boundary direction in a spherical coordinate system, and mapping the yaw angle omega and the pitch angle phi to pixel points corresponding to a global accessibility map (GAM); and according to the inclusion condition of each to-be-measured blade pixel group and the angle constraint curve in the measurement boundary direction in the image, adjusting the blade disc clamping yaw angle and / or pitch angle, and setting the blade disc inclination attitude as the optimal clamping attitude when the angle constraint curve contains the most pixel groups. According to the method, based on a GAM image data structure, clamping optimization is converted into an image processing problem, the constraint relation between the probe direction and the moving boundary can be visually presented, the optimal clamping posture can be automatically planned, the minimum clamping times can be accurately determined, and compared with existing commercial software, the method has more advantages.

This invention discloses a performance simulation processing method and system for triboelectric nanogenerators. The method involves collecting physical parameter data sets and structural parameter data sets of the triboelectric nanogenerator device; defining material regions, motion boundaries, and load interfaces in the three-dimensional geometric model of the triboelectric nanogenerator; setting external load parameter data sets and environmental frequency data sets as coupling boundary conditions in a multiphysics coupling model; performing finite element numerical simulation to obtain output characteristic data sets, generating key parameter data subsets; constructing a multi-objective optimization model based on the key parameter data subsets and output characteristic data sets, and setting optimization objective weights and constraints; obtaining an optimized structural parameter data set; updating the optimized structural parameter data set to the three-dimensional geometric model of the triboelectric nanogenerator, and performing judgments until the convergence criterion is met. This invention can significantly improve the targeting of structural design and the optimization convergence efficiency.

This invention relates to the field of motion monitoring technology and discloses a detection system for an NFC behavior detection wristband. The system includes an initial model determination module, which determines the initial motion monitoring model by having the wristband touch the first NFC node; a multi-model matching analysis module, which analyzes the matching of the initial motion monitoring model and multiple candidate models with the current motion state to obtain weight change results; a candidate boundary determination module, which performs statistical analysis based on weight changes to determine candidate boundaries for motion state switching; an anchor point backtracking correction module, which backtracks and corrects previous motion data when the NFC confirmation node is touched to determine the actual motion boundary; and a monitoring mode update module, which updates the motion monitoring model based on the actual motion boundary. By combining NFC technology and multi-model dynamic matching, motion state monitoring and mode switching are achieved, capturing changes in motion state in real time and automatically adjusting the monitoring model, thereby improving the accuracy and automation of motion monitoring.

The invention discloses a millimeter wave radar point cloud moving target segmentation method based on a layered space-time network. The method comprises the following steps: step 1, obtaining a radar point cloud sequence data set; 2, constructing a layered space-time consistency moving target segmentation network HSTC-MoSeg, wherein the layered space-time consistency moving target segmentation network HSTC-MoSeg comprises a layered context attention block, a space adaptive point convolution module and a time consistency enhancement module; 3, training the improved model and obtaining a test result; and 4, performing an ablation experiment to verify the effectiveness of each module. According to the method, local and global semantic contexts are balanced through the hierarchical context attention block, and the problem of unbalanced feature expression caused by uneven point cloud density is solved; local aggregation of density robustness is realized through spatial adaptive point convolution, and feature degradation of a sparse region is reduced; through a time consistency enhancement module, the segmentation consistency is enhanced by using cross-frame time information, and the jitter of a motion boundary is inhibited. Experiments on a RadarMOSEVE data set show that the method provided by the invention is obviously superior to the existing method in indexes of IoU-Avg, F1-Avg and Movin-F1, and the accuracy and robustness of radar point cloud moving target segmentation are effectively improved.

The application relates to a method and device for estimating a ventricular wall motion based on an adaptive regularization optical flow model, belonging to the technical field of ultrasonic image processing. The method is characterized in that: firstly, the obtained optical flow vector is analyzed through two-dimensional wavelet analysis and function mapping to obtain motion boundary information of the motion field relative to sudden change; secondly, the sudden change motion boundary information is adaptively fed back to the optical flow calculation model to correct the regularization coefficient of the smoothing term and recalculate the optical flow field; finally, the optical flow calculation process is repeated until the wavelet high-frequency component of the optical flow field converges; the method reflects the gradient difference between the myocardial ventricular wall and the surrounding tissue in the regularization coefficient, thereby improving the accuracy of motion estimation.

The invention belongs to the field of particle distribution optimization, and particularly relates to an SPH particle distribution optimization method based on gradient particle migration, which comprises the following steps: carrying out WCSPH calculation, initializing a fluid domain and a rigid body motion boundary in a WCSPH solver, defining a center coordinate according to the structural characteristics of a solved object, delimiting a migration region based on the center coordinate, and carrying out gradient particle migration. Traversing particles in the marked area after the calculation step is finished, and updating the center coordinates in real time when the solving object moves; calculating the Euclidean distance from the marked particles to the boundary of the migration region, calculating a migration volume correction coefficient, and calculating a synthetic migration vector by combining the position vector of the marked particles; and updating the position of the marked particle according to the synthesized migration vector, and updating a density field to complete particle migration. The simulation feasibility of engineering problems such as the actual ship inflow surge effect is remarkably improved, and the method has outstanding industrial application value.

This invention discloses a vehicle convertible control method, system, electronic device, storage medium, and vehicle. The method includes: responding to a vehicle convertible control signal; when the control signal is deemed valid, parsing the control signal and generating a corresponding control command; responding to the control command, capturing a motion trajectory image of the vehicle convertible based on a preset frame rate; identifying the motion boundaries and obstacle information of the motion trajectory image according to a convertible recognition algorithm; calculating the difference between the identified motion trajectory image and the preset motion trajectory information based on an image matching algorithm; executing corresponding convertible control logic based on the difference between the identified motion trajectory image and the motion trajectory information; and displaying the status of the vehicle convertible in real time. This method features high automation, high safety, high intelligence, and strong adaptability, significantly improving the user experience of vehicle convertibles.

The invention discloses a performance simulation processing method and system applied to a friction nano-generator. The method comprises the following steps: acquiring a physical parameter data set and a structural parameter data set of a friction nano-generator device; defining a material area, a motion boundary and a load interface in the three-dimensional geometric model of the friction nano-generator; setting an external load parameter data set and an environment frequency data set as coupling boundary conditions in the multi-physics field coupling model; finite element numerical simulation is executed to obtain an output characteristic data set, a key parameter data subset is generated, a multi-target optimization model is constructed according to the key parameter data subset and the output characteristic data set, and optimization target weights and constraint conditions are set; obtaining an optimized structure parameter data set; and the optimized structure parameter data set is updated to the three-dimensional geometric model of the friction nano-generator, and judgment is carried out until the convergence criterion is met. According to the method, the pertinence of the structural design and the optimization convergence efficiency can be remarkably improved.

The invention provides a wing dynamic grid prediction model construction method, a wing dynamic grid prediction method and related equipment, and relates to the technical field of wing dynamic grid generation, and the method comprises the steps: obtaining a first motion boundary displacement based on an external node of a wing surface, and obtaining a preset grid topology which comprises a plurality of internal nodes; and constructing a continuous medium mechanical equation, solving an internal and external node displacement change relation based on the continuous medium mechanical equation, and inputting the internal and external node displacement change relation and the first motion boundary displacement into a neural network model for training. According to the method, the continuous medium mechanical equation is constructed, the change of the internal node displacement of the grid along with the external node displacement is learned, and the technical problem that in the prior art, an artificial model generally aims at specific motion mode training, and one motion needs to be retrained is solved.

The application discloses a small Reynolds number liquid film flow simulation method, which is based on a flow physical model, derives normal stress and shear stress balance conditions and motion boundary conditions of a liquid film surface under the action of gravity, airflow shear force and evaporation effect, and carries out non-dimensionalization and simplification on wall surface non-slip boundary conditions, flow mass equation and momentum equation and liquid film surface boundary conditions; aiming at small Reynolds number flow, the method is based on long wave theory to derive a differential equation of liquid film thickness evolution with time and space under the synergistic influence of gravity, airflow shear force and evaporation effect; the differential equation is subjected to weak nonlinear evolution analysis of wave, the change relationship of wave instability growth rate with gravity, airflow shear force and evaporation effect is obtained, and a change image of the influence of airflow shear force and evaporation effect on the liquid film wave instability growth rate is given.

This invention discloses a multi-axis cooperative motion control system and method for industrial robots, relating to the field of robot control technology. The system includes a data acquisition module, a machining constraint processing module, a constraint matching module, a conflict relationship generation module, a constraint arbitration module, and a motion reconstruction module. The data acquisition module acquires the machining trajectory, tool status, axis motion status of each joint axis, and current machining segment number in the surface grinding machining program. The machining constraint processing module generates a set of machining constraints including maintenance-type machining constraints, amplitude-limiting deviation-type machining constraints, substitution adjustment-type machining constraints, and axis motion boundary constraints. The constraint matching module calculates the execution requirements and matches them with the axis motion boundary constraints. The conflict relationship generation module generates a machining constraint conflict relationship table. The constraint arbitration module generates machining constraint arbitration results. The motion reconstruction module generates local multi-axis motion reconstruction instructions based on these results. The system can transform machining constraint conflicts in surface grinding into executable multi-axis motion control results.

The invention discloses an industrial robot software reliability test profile generation method and device based on a large model and operation data, and a storage medium. The method comprises the following steps: collecting multi-modal data of an industrial robot in actual operation; on the basis of the aligned multi-modal data, segmenting a continuous data stream into independent motion segments according to a software event or a motion boundary, and constructing a feature representation for describing an event-response relationship; based on the extracted feature vectors, constructing a software event-motion response association model, and identifying a typical operation mode and an abnormal mode; and based on the obtained correlation model analysis result, carrying out inductive reasoning and probabilistic modeling by utilizing a large model, and generating a JSON format test profile. According to the method, low-frequency and hidden time sequence defects and logic errors can be efficiently and automatically found, and the test coverage rate and the fault reproduction capability are remarkably improved.

This invention discloses a mechanical modeling method for clustered tensioned monolithic structures. This invention can be used for quasi-static and dynamic simulations of this type of structure. The provided model has simple motion boundary conditions, is easy to implement, and has high computational efficiency. The method of this invention includes: a mechanical modeling method for clustered tensioned monolithic structures based on arbitrary Lagrange-Euler descriptions.

A high-speed projectile water entry supercavitation flow numerical value prediction method comprises the following steps: dividing a flow field computational domain by adopting an overlapped grid, realizing accurate capture of a motion boundary of a projectile through dynamic cutting, and executing a grid independence test; based on the computational domain, constructing a three-phase control equation based on a VOF model; on the basis of the established control equation, a flow field is solved through a Standard k-epsilon model and a Schnerr-Sauer cavitation model, and flow field pressure is output; predicting a projectile motion track by using a six-degree-of-freedom dynamic grid; according to the system, the equipment and the medium, numerical prediction of the high-speed projectile in-water super-cavitation flow process is realized based on the method; according to the method, the accuracy of the method is verified through grid independence test and experimental data comparison (the initial speed is 75.4-142.7 m / s), and finally, a Standard k-epsilon model is selected as an optimal turbulence model; the coupling problem of phase change, turbulent flow and cross-medium flow in the high-speed water entry process is solved, and a high-precision numerical prediction tool is provided for projectile design.

This application relates to a motion capture method, device, equipment, and medium for ice hockey passing and control training. The method includes: acquiring raw motion data from an inertial measurement unit (IMU), synchronizing and cleaning it to obtain a synchronization data matrix; constructing an initial spatiotemporal graph using IMUs as nodes and spatial relationships as edges; generating weight information using a LASSO feature selector, and weighting it to obtain an updated spatiotemporal graph; inputting the updated spatiotemporal graph and weights into a graph neural network for synchronous inference of motion segmentation, category, and quality assessment information; decoding the motion boundaries and category labels using the Viterbi algorithm; inputting the data into a scoring regression model to calculate a technical quality score, and outputting the motion analysis results. This method can accurately capture ice hockey passing and control motions, achieving integrated motion segmentation, classification, and quality assessment, thus improving training analysis efficiency.

This application relates to a method for simulating adhesive leveling, a method for determining adhesive bonding process parameters, and an apparatus. The method includes: constructing an adhesive leveling simulation computational domain based on the geometric parameters and adhesive properties of the target process model; the computational domain includes a first bonding wall, a second bonding wall, and a fluid domain located between the first and second bonding walls; dividing the fluid domain into a first edge layer region, an intermediate deformation region, and a second edge layer region along the direction of the distance change between the first and second bonding walls; wherein the first and second edge layer regions use boundary layer meshes with unchanged topology, and the intermediate deformation region uses a dynamic meshing method for mesh updating; simulating the bonding motion based on preset motion boundary conditions, and performing the simulation based on a gas-liquid two-phase interface tracking model. This method can improve the computational efficiency and accuracy of dynamic leveling simulation of the adhesive under pressure while ensuring computational stability.

This invention relates to the field of weeding equipment control, and particularly to a method and system for controlling the travel speed of physical weeding equipment. It includes: acquiring signals of the spatial distribution of the work area to be worked on and constructing a parameterized task space model; extracting the projection vector relationship of weed feature clusters within the motion boundary constraints of the work space; determining the frequency of spatial task execution based on the projection vector relationship, and determining the minimum task cycle by combining real-time data throughput rate and physical response rate; determining a time delay term based on the installation distance between the forward sensing module and the controlled operating system and the real-time feed rate; and generating a feed rate control command based on the minimum task cycle and the time delay term to adjust the travel speed. Through feedforward spatial topology pre-sensing and kinematic constraint calculation, adaptive speed adjustment for non-uniform weed distribution is achieved, avoiding actuator saturation and logic accumulation, and improving weeding accuracy and work efficiency.

This specification relates to the field of circuit breaker simulation technology, and more particularly to a method and apparatus for simulating the dynamics of a circuit breaker. The method for simulating the dynamics of a circuit breaker includes: constructing a first multibody dynamics model of the transmission mechanism in the circuit breaker; extracting first motion boundary conditions for a target interface based on the global simulation results of the first multibody dynamics model; constructing a finite element model of the target interface; obtaining first local simulation results of the finite element model based on the first motion boundary conditions; constructing equivalent nonlinear mechanical elements based on the first local simulation results; updating the first multibody dynamics model based on the nonlinear mechanical elements to obtain a second multibody dynamics model; and obtaining the dynamics simulation results of the transmission mechanism based on the second multibody dynamics model and the finite element model. The embodiments in this specification can improve the accuracy of dynamics simulation of circuit breaker transmission mechanisms.

The application discloses a laser limiter, and relates to the technical field of laser precision positioning, which comprises a geometric perception module, a reflection analysis module, an incidence optimization module, a laser detection module, a limiting coordinate calculation module and a limiting control response module; geometric boundary information at the end of a target moving component is collected to construct a parameter set containing a normal vector and a curvature; laser ray tracing and reflection risk factor analysis are combined to dynamically adjust the wavelength, divergence angle and incidence angle of a laser source, so that the laser beam can be stably incident; the laser detection module monitors the change of signal strength in real time, generates a space truncation judgment value, and is fitted with a theoretical intersection position to obtain actual limiting coordinates; the limiting response is triggered according to the change of the receiver signal to control the moving component to accurately stop at a target position; the application has the advantages of high precision, high adaptability and non-contact, and is particularly suitable for the accurate limiting control of a moving boundary in a micro-scale space.

This invention belongs to the field of computer vision technology, specifically relating to an optical flow estimation method, program, device, and storage medium based on a state-space model. The invention designs an image feature enhancement network based on a CNN-Mamba hybrid module and a Mamba feature cross-enhancement module, and designs a neural network with a CNN-Mamba hybrid recurrent regression framework. This invention utilizes the CNN-Mamba hybrid module's image feature enhancement network to efficiently extract global information from the input image, not only exploring long-range dependencies between pixels but also maintaining linear complexity. This invention uses the Mamba feature cross-enhancement module to obtain global motion features, aggregates global texture information within the motion boundary, and enhances the texture features, ultimately improving the accuracy of optical flow estimation.

The application relates to a moving boundary pressure field reconstruction method, a system, a device and a medium, and the moving boundary pressure field reconstruction method comprises the following steps: acquiring moving boundary flow field data, wherein the moving boundary flow field data comprises a velocity field and a moving boundary; generating training data, wherein the training data comprises velocity supervision data, boundary supervision data and flow parameters; constructing a double neural network model according to preset parameters, wherein the double neural network model comprises a boundary network and a flow field network; training the double neural network through the training data; inputting the spatial coordinates of a to-be-predicted point; and the trained double neural network correspondingly outputs the pressure value of the point to predict the pressure field and the boundary under the moving boundary condition. The application obtains accurate boundary conditions and reduces the pressure reconstruction error of the flow field under the moving boundary.

This invention provides a method and system for controlling the production of silicone sealant based on digital twins. The method includes: simulating the flow field evolution in a digital twin stirring model using impeller motion state data as motion boundary conditions, combined with static boundary conditions and initial flow field conditions, to obtain the flow state distribution relationship of the sealant within a physical stirring device; constructing a state evolution model of the sealant during the mixing process based on the flow state distribution relationship; predicting the stirring intervention strategy indicated when the sealant reaches the target mixing state based on the state evolution model; controlling the physical stirring device to perform operations based on the stirring intervention strategy; updating the motion boundary conditions based on the operating parameters of the physical stirring device after the operations; simulating the flow field evolution and state evolution prediction based on the updated motion boundary conditions; iteratively optimizing the stirring intervention strategy until the target mixing state is met, at which point the physical stirring device is stopped. This invention improves the product quality of silicone sealant during the production process.

A method for autonomous navigation of an autonomous vehicle includes: estimating the stop duration for the autonomous vehicle to come to a complete stop, based on the vehicle's current speed; calculating a critical time from the current time multiplied by the stop duration; detecting an object in a scanned image of a field near the autonomous vehicle, captured by a sensor on the autonomous vehicle at the current time; deriving the object's current location and movement from the scanned image; calculating a future state boundary representing an area of ​​terrain accessible to the object up to the critical time, based on the object's current location and movement and a set of predefined movement boundary assumptions for generic objects near public roads; and choosing a navigation action to avoid entering the future state boundary before the critical time.

This invention discloses a method for analyzing table tennis training movements based on multi-source information fusion. It employs at least two video sources, a nine-axis posture sensor at the trainee's wrist, and an audio source to acquire training process information. After unified time synchronization, frame alignment, and preprocessing, a YOLO-based detection and keypoint extraction module outputs bounding boxes for the trainee, racket, and table tennis ball, as well as keypoints on the human body. A nine-axis posture analysis module outputs posture sequences and motion features, while an audio event detection module outputs peak values ​​for ball impact and table contact. A multi-source feature matrix is ​​then constructed and input into an improved TriDet temporal motion localization model to obtain the motion category, start time, end time, and confidence level. Finally, the method outputs training movement analysis results, comprehensive evaluation indicators, and training suggestions. This approach improves the accuracy of motion boundary localization, the accuracy of ball impact recognition, and the comprehensiveness of training evaluation, and is suitable for edge deployment.

The invention discloses a target detection method based on computer vision, and relates to the technical field of dynamic vision detection, and the method comprises the steps: analyzing an event stream in a collected event image data set to generate event data points, filling a space counting grid with the event data points, and constructing an event space-time matrix; calculating a local information entropy graph based on the event space-time matrix, generating a dynamic sparse mask according to a preset entropy threshold, inputting the RGB image frame into a convolutional neural network to generate an RGB feature graph, and performing mask sparsification to generate a sparse RGB feature graph; and extracting an event optical flow field in a mask coverage area, performing resolution adaptation of the event optical flow field, and performing motion compensation on the sparse RGB feature map in a mask non-zero area to generate a sparse alignment feature map. Through a cooperation mechanism of dynamic mask generation and precise local motion compensation, the limitation of traditional dynamic target detection is broken through, and the target contour is precisely locked by using the entropy gradient characteristic of the event stream at the motion boundary.

The invention discloses a vehicle-mounted radar multi-target track-before-detect method based on multi-coordinate system collaboration, which comprises the following steps of: firstly, establishing a four-dimensional discrete measurement space by introducing azimuth angle speed according to acquired multi-frame measurement data, discretizing a state space according to the four-dimensional discrete measurement space, mapping a discrete state originally in an antenna coordinate system to a unified navigation coordinate system, and carrying out multi-target track-before-detect on a vehicle-mounted radar. The method comprises the following steps: deducing a state transition range of a previous frame by using a moving boundary constraint strategy, converting states in the state transition range into an antenna coordinate system to accumulate a value function, finally obtaining a candidate target state set based on a preset detection threshold, screening an optimal candidate state from the candidate target state set, and finally obtaining the optimal candidate state. And carrying out track backtracking to obtain a target estimated track. According to the invention, effective detection and tracking of multiple targets by the vehicle-mounted radar can be realized under the condition that the radar platform moves and the prior information of the targets is unknown.

The present application relates to the field of precision measurement, in particular to a method for determining the clamping posture in five-axis detection of a blisk, a medium and an apparatus. The method comprises the following steps: obtaining the yaw angle ω and the pitch angle φ of the required probe direction and the measurement boundary direction in the spherical coordinate system for planning the measurement path of the blade to be measured of the blisk, and mapping them to the corresponding pixel points of the global accessibility map (GAM). According to the inclusion of each pixel group of the blade to be measured and the angle constraint curve of the measurement boundary direction in the map, the yaw angle and / or the pitch angle of the blisk clamping are adjusted, and the tilting posture of the blisk when the angle constraint curve contains the most pixel groups is determined as the optimal clamping posture. The method is based on the image data structure of GAM, converts the clamping optimization into an image processing problem, can intuitively present the constraint relationship between the probe direction and the motion boundary, can automatically plan the optimal clamping posture, and can accurately determine the minimum clamping times, and has more advantages than the existing commercial software.

Real-time neural video codecs face significant latency and energy bottlenecks due to pixel-level grid sampling, which requires irregular, fine-grained memory accesses and limits efficient hardware acceleration. To address this, a sub-tile-based grid sampling technique is disclosed herein. The technique determines super tile sizes using motion vector gradients, neural network parameters, and available on-chip memory. A super tile is split into sub-tiles by detecting motion boundaries through motion vector analysis, where a sub-tile has homogeneous motion vectors. For each sub-tile, a reference bounding box is computed to enable efficient block transfers of reference data, and per-pixel metadata is generated for feature interpolation. The pipelined, parallelizable solution reduces number of memory accesses and computational overhead, compared to existing pixel-based techniques.