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70results about How to "Improve Simulation Efficiency" patented technology

Simulation method and device of AR optical system, medium and electronic equipment

The invention discloses a simulation method and device of an AR optical system, a medium and electronic equipment, and the method comprises the steps: obtaining an initial source file, converting the initial source file into a target file based on a Kogelnik coupling wave theory and a preset volume holographic grating structure requirement, and importing the target file into ZEMAX; acquiring a corresponding luminous source according to preset parameters of the display; obtaining an initial collimation component, converting the initial collimation component into a target collimation component, and importing the target collimation component into the ZEMAX; in a non-sequence mode of ZEMAX, calling a target file, generating a volume holographic grating, and obtaining a holographic waveguide assembly; and connecting the light emitting source, the target collimation assembly, the holographic waveguide assembly and a preset detector to obtain the target AR optical system. Compared with the prior art, simulation of the holographic waveguide assembly and simulation of the integrity of the AR optical system can be achieved, the simulation efficiency is improved, the systematicness, integrity and quality of simulation are improved, and then the optical performance of the optical system in AR equipment is improved.
Owner:JIANGXI RUIHONGDA TECHNOLOGY CO LTD

A swing laser welding equivalent heat source modeling method and a swing laser welding simulation method

ActiveCN115630512BImprove Simulation EfficiencyShorten the calibration cycle
The application discloses a kind of swing laser welding equivalent heat source modeling methods, comprising: the energy distribution nephogram of actual laser welding heat source under different swing trajectory, swing frequency and swing amplitude is constructed;Along the direction of heat source center position, extract energy distribution curve, obtain the spatial position information of multiple target interest points;Equivalent Gaussian heat source model is respectively constructed for each target interest point;Gaussian heat source model and actual laser welding heat source are verified, and the Gaussian heat source model that passes verification is used as the equivalent heat source model of actual laser welding heat source.The application also provides a kind of swing laser welding simulation method, and the equivalent heat source model is constructed using the aforementioned modeling method, and welding simulation is carried out based on equivalent heat source model.The application can greatly shorten the heat source checking period when swing laser welding simulation, improve the simulation efficiency of entire swing laser welding.
Owner:JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD +1

Seamless track key influence factor identification method considering multi-source uncertainty

PendingCN121787145AAccurately characterize the key influencing factors of service performanceReduce stepsDesign optimisation/simulationNeural learning methodsData setSensitive analysis
The invention relates to the technical field of railway engineering reliability analysis, and particularly discloses a seamless track key influence factor identification method considering multi-source uncertainty, and the method comprises the steps: firstly, constructing an initial factor library and a parameter set based on field and literature data; secondly, a Latin hypercube sampling (LHS) technology is adopted to generate samples in an uncertain parameter space, and an input-response data set is obtained through parametric simulation; secondly, training a high-precision efficient proxy model based on simulation data to replace an original physical model; and finally, implementing Monte Carlo simulation (MCS) based on the agent model, and completing system probability reliability evaluation and global sensitivity analysis. According to the method, the influence of multiple parameters and the coupling effect thereof on the service performance of the seamless track can be evaluated simultaneously in single simulation, the analysis efficiency is remarkably improved, and the method is suitable for reliability analysis and optimization design of the seamless track in a complex environment.
Owner:SOUTHWEST JIAOTONG UNIV +3

Wind power plant equivalent modeling method for maintaining subsynchronous / supersynchronous oscillation characteristics

The invention discloses a subsynchronous / supersynchronous oscillation characteristic-maintained wind power plant equivalent modeling method, which comprises the following steps of: constructing a frequency domain impedance model based on a doubly-fed fan series compensation grid-connected system; based on the frequency domain impedance model, the influence of the wind speed and the grid-connected distance on the frequency domain impedance characteristic is analyzed, and a dynamic grouping result of the doubly-fed wind turbine generator is obtained through a clustering algorithm; adopting a capacity weighting method to obtain parameters of an equivalent wind turbine generator; determining reserved nodes and eliminated nodes of the system according to a dynamic grouping result of the wind turbine generator, and obtaining equivalent parameters of the current collection network by adopting an REI static equivalence method; and establishing a doubly-fed fan series compensation grid-connected system simulation model based on the simulation platform, comparing the steady-state power flow, the dynamic response and the sub / super-synchronous oscillation characteristics before and after equivalence, and analyzing the equivalence precision. The new energy station dynamic equivalence method provided by the invention has good equivalence precision in steady-state power flow and dynamic response characteristics, and provides an accurate model basis for analyzing the stability of a high-proportion new energy power system.
Owner:STATE GRID ANHUI ELECTRIC POWER CO LTD +3

Shock absorber road load acquisition method, analysis method and system, and storage medium

ActiveCN117592195BEnsure degrees of freedomSolve the problem of not being able to extract lateral forceRoad surfaceMechanics
The application relates to a shock absorber road load acquisition method, an analysis method and system and a storage medium, which comprise the following steps: determining hard points connected with other components in a shock absorber assembly in a suspension design state; establishing a shock absorber assembly dynamics model, and establishing a local load coordinate system of each hard point related to the dynamic load of a shock absorber piston rod on the shock absorber piston rod; establishing a local load coordinate system of each hard point related to the dynamic load of a shock absorber cylinder on the shock absorber cylinder; setting displacement output between an upper point of the shock absorber piston rod and a lower fixed center point of the shock absorber, force and torque output borne by the shock absorber piston rod, and force and torque output borne by the shock absorber cylinder; establishing a whole vehicle multi-body dynamics model; and simulating the response of each system of the vehicle under various virtual road surface excitations. The application can truly simulate the change condition of the shock absorber road load.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD

Method, device, medium and equipment for improving efficiency of module drop simulation

ActiveCN115828657BReduce simulation timeNo need to change qualityGeometric CADDesign optimisation/simulationSimulationGeometric modeling
This invention provides a method, apparatus, medium, and device for improving the efficiency of module drop simulation. The method includes: receiving a geometric model of a module; dividing the geometric model according to a preset partitioning strategy to generate a mesh model; the mesh model includes multiple mesh elements; filtering the mesh model based on a preset minimum step time to obtain target mesh elements; the target mesh elements are mesh elements that reduce simulation computation efficiency; adjusting the target mesh elements to reduce the simulation time required by the mesh model; thus, when performing drop simulation on the module, mesh elements with longer simulation times are filtered out and then adjusted, thereby reducing the simulation time required by the entire mesh model and improving simulation efficiency; and without needing to scale the mass of the entire mesh model, ensuring the accuracy of the simulation results.
Owner:KUNSHAN QIUTI PHOTOELECTRIC TECH CO LTD

Circuit breaker fault diagnosis method and system based on simulation model

The invention provides a circuit breaker fault diagnosis method and system based on a simulation model, and relates to the technical field of fault diagnosis, and the method comprises the steps: pre-constructing a three-dimensional electromagnetic field simulation model and a temperature field simulation model of a circuit breaker; coupling simulation is carried out, and a reference database is constructed; acquiring real-time operation current, acquiring real-time temperature distribution, and retrieving target associated working condition mapping data; calling a target simulation temperature, and carrying out pixel-level deviation comparison on the target simulation temperature and the real-time temperature distribution; performing backtracking parameter adjustment according to the temperature deviation threshold exceeding area; and performing fault judgment according to the fault root cause and the temperature deviation threshold exceeding region, and outputting a real-time fault type and an alternative maintenance strategy. Through the circuit breaker fault diagnosis method and device, the technical problem that in the prior art, due to the fact that a traditional method is not sensitive to early-stage local faults and slow-change deterioration of a circuit breaker, the circuit breaker fault diagnosis precision is low is solved, and through coupling simulation of the three-dimensional electromagnetic field simulation model and the temperature field simulation model, the circuit breaker fault diagnosis precision is improved.
Owner:大唐观音岩水电开发有限公司 +2

Hydroelectric water flow simulation method and system based on digital twinning

InactiveCN121859777AAccurately assess complexityAccurately assess instabilityDesign optimisation/simulationAdaptive optimizationWater flow
The invention relates to the technical field of hydropower station data processing, in particular to a hydropower flow simulation method and system based on digital twinning, and the method comprises the steps: analyzing the distance between any two data points in a cluster where a data point corresponding to a main frequency is located, and the energy and local density corresponding to each data point, so as to determine the energy intensity; the water flow fluctuation degree is determined by analyzing the water flow speed at any moment within the preset duration before each moment, the difference between the water flow speed at any moment and the water flow speed at the adjacent previous moment, and the energy intensity; and by analyzing the dispersion degree of the angles between the tangent vector of each grid and the tangent vectors of all adjacent grids and the similarity of the tangent vectors, determining the disordering degree of the tangent vectors, and optimizing the grid size in combination with the water flow fluctuation degree. According to the method, the precision and efficiency of hydroelectric flow simulation are improved by adaptively optimizing the grid size.
Owner:ZHIJIEYUNFU (DALIAN) INFORMATION TECH CO LTD

A method and system for numerical simulation of atomizer atomization based on temperature change characteristics

The present application relates to the technical field of atomization numerical simulation, and relates to an atomizer atomization numerical simulation method and system based on temperature variation characteristics, which comprises the following steps: confirming a test atomizer set and an ambient temperature set, obtaining a plurality of normal liquid viscosity sets and a plurality of normal liquid droplet surface tension sets, obtaining an optimized temperature interval, constructing a viscosity surface tension momentum equation, setting a solver parameter, sequentially extracting an optimized temperature value from the optimized temperature interval, simulating a pre-constructed simulation atomizer according to the solver parameter, the optimized temperature value and the viscosity surface tension momentum equation, obtaining a simulation atomization parameter, otherwise, taking the simulation atomization parameter as an optimized atomization parameter, summarizing the optimized atomization parameters, obtaining an optimized atomization parameter set, obtaining an optimal atomization parameter, and completing the atomizer atomization numerical simulation based on the temperature variation characteristics based on the optimal atomization parameter. The present application can improve the performance and atomization effect of the atomizer.
Owner:MEGA TECH (DONGGUAN) CO LTD

Parallel simulation method and system for large-scale multi-modal traffic based on cpu and gpu

The application discloses a large-scale multi-mode traffic parallel simulation method and system based on CPU and GPU, relates to the technical field of traffic control, and comprises the following steps: acquiring traffic road networks to be simulated and multi-mode traffic demand data, dividing the traffic road networks to be simulated and the multi-mode traffic demand data based on a preset dynamic spectrum division algorithm to obtain a multi-mode traffic network division result; performing dynamic congestion detection and information feedback processing on the multi-mode traffic network division result based on a preset cross-process congestion feedback algorithm and an MPI communication optimization strategy to obtain congestion state information; inputting the congestion state information into a pre-established microscopic traffic intelligent agent model to perform microscopic behavior parallel calculation, and outputting microscopic behavior data based on the limitation of a regionalized Bucket communication mechanism; and performing simulation processing based on the microscopic behavior data to obtain a final traffic parallel simulation result, so that the simulation precision and efficiency are significantly improved.
Owner:SOUTHEAST UNIV

A method for calculating a number of physical bits of a 5G NR network SSB

PendingCN122661072AEfficient and easy calculationImprove production efficiencyFrequency spectrumResource element
The application discloses a method and system for calculating the physical bit number of SSB of a 5G NR network, and belongs to the technical field of mobile communication. The method comprises the following steps: determining the time domain distribution pattern and the possible position of the starting time domain symbol of SSB according to the subcarrier spacing, carrier frequency, duplex mode and spectrum sharing access scene of SSB, then determining the number of candidate SSB indexes, and combining the high-level protocol parameter ssb-PositionsInBurst to calculate the number of time domain symbols occupied by the actual transmission of SSB; determining the number of frequency domain subcarriers occupied by SSB according to the offset of the starting subcarrier of SSB and the starting subcarrier of the common resource block 0; and finally calculating the total number of time-frequency resource elements and multiplying the modulation order to obtain the physical bit number of SSB. The application can quickly and accurately calculate the physical bit number of SSB based on the physical layer parameters without implementing a complex protocol signal processing algorithm, and significantly improves the efficiency of SSB data generation and test work.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD

VFTO distribution characteristic analysis method and system of extra-high voltage GIS based on multi-confidence interval evaluation

The invention discloses an extra-high voltage GIS VFTO distribution characteristic analysis method and system based on multi-confidence interval evaluation, and the method comprises the steps: firstly collecting breakdown voltage data caused by GIS isolation switch operation, and obtaining the posterior distribution of BDV through employing a hierarchical Bayesian model in combination with MCMC sampling of PyMC; then corresponding upper and lower bounds of a confidence interval are extracted under multiple confidence levels, upper and lower boundary curves are fitted through a parameterization function, upper and lower boundary mathematical expressions describing the change of the BDV along with time are formed, and the expressions are directly embedded into an EMTP / ATPdraw simulation model to serve as breakdown voltage boundary conditions. The VFTO characteristics under different dispersity conditions are quickly simulated on the premise that a random sequence does not need to be generated.
Owner:CHINA THREE GORGES UNIV

An efficient three-dimensional spectral element metamaterial electromagnetic simulation technique

ActiveCN117034698BImprove orderwith spectral precision
A highly efficient three-dimensional spectral element metasurface electromagnetic simulation technique belongs to the field of electromagnetic simulation. 1) Based on the desired function, find suitable metasurface scattering elements, solve for the scattering parameters, and synthesize the polarizability tensor required for the generalized thin-film transition conditions; 2) Establish a three-dimensional geometric model, selecting the model's material parameters, boundary conditions, and the size and form of the incident beam; 3) Mesh the geometric model using a hexahedral mesh, and mesh the zero-thickness equivalent thin film of the metasurface using a quadrilateral mesh; 4) Read the mesh information, perform preprocessing, set boundary conditions and material parameters, generate the system matrix using the spectral element method, and obtain the spatially discretized matrix equations; 5) Solve for the electric field value and observe the electric field distribution; 6) Determine if the electric field distribution meets expectations. If so, plot the electric field distribution; otherwise, correct the result by adjusting the scattering parameters and resolving the polarizability, repeating steps 4) to 5) until convergence.
Owner:XIAMEN UNIV

Reinforcement learning simulation step control method based on closed-loop adaptive noise injection and entropy increasing optimization strategy

ActiveCN120255376BImprove exploration abilityExplore efficiencySimulator controlTransient analysisAlgorithm
This invention discloses a reinforcement learning simulation step size control method based on closed-loop adaptive noise injection and entropy increase optimization strategy, belonging to integrated circuit computer-aided design technology. Specifically, the method involves: first, inputting the circuit netlist and interacting with the simulator using file read / write; next, establishing two new network output layers to convert the deterministic actions of the policy network's output into a probability distribution; then, obtaining the entropy regularization term based on the probability density function and weight coefficients, and adding it to the policy loss function; next, generating Gaussian-distributed exploration noise and adjusting the standard deviation of the noise at each step using a PID controller; finally, adjusting the policy network parameters using a gradient update method and injecting the exploration noise into the output actions to obtain the final time step. Using this invention helps enhance the simulation stability of pseudo-transient analysis, improves simulation efficiency, and provides a new method for DC analysis.
Owner:SOUTHEAST UNIV

Multi-scene simulation and data evaluation method for unmanned aerial vehicle flight performance

ActiveCN119761136BAccurately predict flight performancereflect flight performanceDesign optimisation/simulationMachine learningElement analysisPhysical model
The present application relates to the technical field of unmanned aerial vehicles, and specifically relates to a method for simulating flight performance of unmanned aerial vehicles in multiple scenarios and evaluating data, comprising the following steps: firstly, a three-dimensional physical model of the unmanned aerial vehicle is established using computer-aided design, and aerodynamic and structural mechanics simulations are performed through computational fluid dynamics and finite element analysis; secondly, real-time meteorological data and terrain information are fused to simulate the flight performance of the unmanned aerial vehicle in complex flight environments; the simulation process is accelerated using high-performance computing, and machine learning algorithms are applied to optimize nonlinear parameters in the simulation model; finally, the actual flight data of the unmanned aerial vehicle is used for calibration, sensor data is processed through techniques such as Kalman filtering, the lift coefficient and drag coefficient are back-calculated, and a closed-loop optimization system is formed; this method can effectively improve simulation accuracy and adaptability in multiple scenarios, reduce the number of actual flight tests, reduce research and development costs and risks, and is suitable for performance evaluation and optimization of various unmanned aerial vehicles.
Owner:CHINESE PEOPLES LIBERATION ARMY NAVAL SPECIALTY MEDICAL CENT

Non-bearing body frame torsional strength analysis method and system

The application provides a non-load-bearing vehicle body frame torsional strength analysis method and system, which comprises the following steps: constructing a finite element model of a frame of a measured vehicle type based on a three-dimensional model of the vehicle type, performing simulation analysis on the finite element model, and obtaining unit torsional angle stress data of the frame; obtaining torsional angle combination spectrum data of a frame rear cross beam on a combined road surface according to a real vehicle road test; grouping parts of the frame according to material properties, matching the torsional angle combination spectrum data with the finite element model of the frame to simulate a frame fatigue test; and calculating fatigue damage values of each part of the frame according to the unit torsional angle stress data of the frame and the torsional angle combination spectrum data, until it is determined that any part fails according to the fatigue damage values. The application can preliminarily verify the torsional strength of the frame in the early stage of design and development, has high test accuracy, provides a reliable basis for frame development, shortens the test cycle and cost, and improves the research and development efficiency.
Owner:VOYAH AUTOMOBILE TECH CO LTD

Helical thread cutting simulation method and system based on analytical expression of skew helicoid

This invention relates to the field of thread turning technology, and discloses a thread turning cutting simulation method and system based on the analytical formula of a helical surface. The method includes: acquiring helical surface data during thread turning and constructing a geometric space model of the helical surface that can represent the tool sweep body; acquiring blank data and constructing a blank model using a tri-dexel model; for dexel segments parallel to the rotation axis, calculating the corresponding rotation angle and axial intersection point using the helical surface geometric space model, and calculating the axial cutting result of the tool based on the axial intersection point; for dexel segments perpendicular to the rotation axis, solving multiple solutions for the rotation angle and multiple intersection points using the helical surface geometric space model, selecting the effective intersection points as non-axial intersection points, and calculating the non-axial cutting result of the tool based on the non-axial intersection points. This invention can improve the efficiency and accuracy of thread turning cutting simulation.
Owner:SHENZHEN QIANJI SOFTWARE CO LTD

Current collection system modeling method and device for new energy station, equipment and medium

PendingCN121981058Areduce in quantityDoes not exceed maximum electrical node limitsCAD circuit designReduced modelNew energy
The invention relates to the technical field of electric power simulation modeling, and discloses a current collection system modeling method, device and equipment for a new energy station and a medium, and the method comprises the steps: constructing a new energy power generation equipment simplified model, a direct current converter simplified model and simplified models of all sections of cables in a current collection line; determining an electrical connection relation between the new energy power generation equipment simplified model and the direct current converter simplified model according to a circuit topology of an actual current collection system; on the basis of the electrical connection relation, the new energy power generation equipment simplified model and the direct current converter simplified model are connected through the cable simplified model, the number of electrical nodes can be reduced, the number does not exceed the maximum electrical node limit of simulation software, the simulation calculation amount is reduced, and the simulation efficiency is improved.
Owner:CHINA THREE GORGES CORPORATION

A network-configuration type multi-converter modeling method based on sub-microsecond simulation

This invention discloses a modeling method for grid-type multi-converter based on sub-microsecond simulation, belonging to the field of converter modeling and simulation technology. The method involves discretizing the switching elements to construct a generalized constant admittance switching model based on the LC equivalent circuit. Then, by discretizing the system state matrix, an extended modeling from a single converter to a multi-converter system is achieved. Furthermore, by combining the inertia characteristics of a virtual synchronous generator, a complete grid-type multi-converter model including control elements is established. Finally, a simulation model of the grid-type multi-converter system is built in PSCAD / EMTDC, verifying the correctness and effectiveness of the method. This invention demonstrates good applicability and stability in integrating the generalized constant admittance switching model with the inertia characteristics of a virtual synchronous generator at a sub-microsecond simulation step size. It significantly improves the simulation accuracy and efficiency while achieving rapid convergence of transient processes in the grid-type multi-converter and active support for grid voltage and frequency.
Owner:NANJING UNIV OF SCI & TECH +2

Single event effect simulation method and related device

The embodiment of the invention discloses a single event effect simulation method and a related device, and the method comprises the steps: calculating particle energy deposition according to an incident particle model, a geometric material model and a configured model which is used for representing the physical process of particles and a sensitive body, the geometric material model is used for digitally describing three-dimensional structures and material compositions of all objects in a simulation space, and all the objects in the simulation space comprise a target material model and a sensitive body model; particle energy deposition is converted into distribution of electron hole pairs relative to spatial positions; determining the distribution positions of the electron hole pairs and the corresponding distribution energy according to the distribution of the electron hole pairs relative to the spatial positions; and determining a single-particle transient current waveform according to the distribution position of the electron hole pair and the corresponding distribution energy, wherein the single-particle transient current waveform is used for representing the electrical property change caused after the particles enter the sensitive body through the target material. By adopting the embodiment of the invention, the improvement of the precision and simulation efficiency of the radiation damage model is facilitated.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

A method for modeling and updating a dynamic system simulation model based on Apmss software

The application relates to a modeling and updating method of a dynamic system simulation model based on Apmss software, which comprises the following steps: in the Apmss software, an independent sample initial template is established for the same structural unit in each subsystem; a subsystem modeling tool is used to instantiate the independent sample initial template to generate a plurality of subsystem simulation model files, namely *.apmss files; an apmss program is used to convert the subsystem simulation model files into cmd command files for generating the subsystem simulation model in the adams software; an assembly command file is generated and executed, the assembly command file comprises reading the cmd command files of the subsystem simulation models and generating an aview.cmd command stream file and starting the adams software; the aview.cmd command stream file is a total file for modeling in the Adams software, and the total file comprises the cmd command files for generating the subsystem simulation models; after the Adams software is started, the aview.cmd file is automatically called to generate the subsystem simulation models in the Adams software and assemble the subsystem simulation models together to obtain a dynamic simulation system model.
Owner:SHANGHAI AEROSPACE SYST ENG INST

A steady-state approximation modeling method for thermal characteristics of high power pulsed semiconductor lasers

The application discloses a steady-state approximate modeling method for thermal characteristics of a high-power pulse semiconductor laser. The method comprises the following steps: obtaining material parameters of each layer of a laser chip, and calculating heat diffusion time of heat in the chip layer; determining characteristic heat diffusion time required for the device to complete main heat diffusion through transient heat simulation of a single pulse period; determining an effective heat participation coefficient according to the heat diffusion time and the characteristic heat diffusion time; multiplying average heat power density of an active region of the high-power pulse semiconductor laser by the effective heat participation coefficient to obtain equivalent heat source density of the active region, and loading the equivalent heat source density into a steady-state heat analysis model for calculation. By introducing the effective heat participation coefficient based on the heat diffusion mechanism, the application corrects errors of a traditional average power model under high-frequency and short-pulse working conditions, realizes the consideration of calculation accuracy and efficiency, and can quickly and accurately predict active region temperature and thermal stress distribution of the pulse laser.
Owner:NANJING UNIV OF SCI & TECH

Urban growth simulation form correction method and system based on grid-vector cooperation

PendingCN121982159AHigh reliability of resultsHigh accuracy of resultsImage enhancementMathematical modelsComputer graphics (images)Algorithm
The invention discloses an urban growth simulation form correction method and system based on grid-vector collaboration, and the method comprises the steps: segmenting remote sensing image data to obtain segmented patches, and forming a fused space unit in combination with a block unit obtained through the processing of vector road data; inputting the land utilization and driving factor data into the grid CA model to obtain converted city cells, and obtaining a city growth simulation result map of the grid CA; and correcting the urban growth simulation result graph of the grid CA by using a form correction strategy to obtain a final corrected urban growth simulation result graph. According to the method, the fused composite space unit is obtained by combining the segmented plaque and the block unit, the fineness of the divided space unit is improved, a more accurate space base is provided for form correction, and effective balance among calculation efficiency, process rationality and form authenticity is realized by utilizing a grid simulation-vector correction cooperation mechanism.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Precision quartz table finite element modeling method for hexahedral mesh division

The invention relates to a precision quartz watch finite element modeling method for hexahedral mesh division, which is suitable for the field of precision instrument finite element simulation, and comprises the following steps: firstly, simplifying a precision quartz watch geometric model, and deleting geometric features which are not beneficial to but do not influence mesh division in geometry; secondly, geometric cutting is conducted on the pendulous reed assembly and the torquer, the overall complex geometric structure is divided into a plurality of geometric parts conforming to the topological mapping relation, feature lines are generated on the surface of the model and the geometric contact face to serve as grid division boundaries, a two-dimensional plane grid is divided according to the feature lines, and therefore the two-dimensional plane grid is obtained; and taking the two-dimensional grid as a mapping matching reference of the hexahedral grid so as to guarantee grid quality and node connection. According to the method, geometric segmentation of the precise quartz watch with a complex structure and difficult grid mapping can be effectively carried out, the grid quality of finite element simulation of the precise quartz watch is improved, the simulation precision and efficiency are both considered, and the method can be popularized and applied to hexahedral grid division of fine instruments such as the quartz watch.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES

Solar flare X-ray full-link simulation method and system based on Geant4

The invention discloses a Geant4-based solar flare X-ray full-link simulation method and system, and belongs to the technical field of space satellite detection and numerical simulation. The method comprises the following steps: building a Geant4-based high-performance hybrid parallel computing platform; a layered magnetization solar atmosphere model is constructed based on the platform, a physical process list is configured, and a high-energy electron particle source is generated; through a ray tracing algorithm and a user-defined stepping action module, tracking simulation is carried out on transmission, scattering and polarization evolution of X-rays in the layered magnetized solar atmosphere; and through a pixelated imaging and data output module, the photon information is mapped to imaging planes of a plurality of virtual detectors, and X-ray imaging pictures, energy spectrums and polarization degree data of different observation visual angles are output. The problems that an existing model is not matched with multi-satellite stereoscopic observation data, Compton scattering details are missing, polarization information is insufficient and calculation efficiency is low are solved, and an effective tool is provided for analysis and simulation of multi-satellite combined observation data.
Owner:SHANDONG UNIV

Steady state simulation method and system for rapidly determining liquid level height difference of double oil tanks and medium

The invention provides a steady-state simulation method and system for rapidly determining the height difference of the liquid levels of two oil tanks and a medium, and belongs to the technical field of commercial vehicle oil supply. The method comprises the steps that the volume ratio is calculated, the stable state condition is set as that the liquid levels of the two oil tanks synchronously descend with the fixed liquid level height difference, and the net oil outlet flow ratio is equal to the volume ratio; converting the liquid level height difference corresponding to the stable state into a pressure difference of the two oil tanks, and setting the pressure difference as a simulation boundary condition; the method comprises the following steps: calculating the net outlet oil flow ratio of two oil tanks in an initial full oil state and the net outlet oil flow ratio of two oil tanks in an empty oil extreme state of a small oil tank through simulation, judging that a stable state exists when the volume ratio is between the two net outlet oil flow ratios, and searching a target pressure value through an iterative algorithm by taking pressure values corresponding to the initial full oil state and the extreme state as intervals; the net oil outlet flow ratio of the two oil tanks obtained in simulation calculation is equal to the volume ratio of the two oil tanks; and obtaining a stable liquid level height difference according to the found target pressure value. The method can quickly determine the liquid level height difference of the double oil tanks.
Owner:SINO TRUK JINAN POWER CO LTD

A method and device for locating the cause of an aperiodic signal, electronic equipment and medium

PendingCN122221761AGive full play to the role of cause and effectReduce troubleshooting timeInference methodsComputer aided design
The application discloses a method and device for locating the cause of an undetermined state signal, electronic equipment and a medium, and relates to the technical field of computers. The method comprises the following steps: when a first signal of an undetermined state type appears in a simulation waveform, the simulation waveform is analyzed to obtain a driving relationship between signals in the simulation waveform; in the current signal tracking round, at least one driving signal of the first signal in the simulation waveform is determined based on the driving relationship; for each driving signal, it is judged whether the driving signal is a signal of an undetermined state type; when the driving signal is a signal of an undetermined state type, the next signal tracking round is entered, and the driving signal of the driving signal in the simulation waveform is determined again based on the driving relationship until the driving signal is a signal of a determined state type; and the cause of the appearance of the first signal in the simulation waveform is determined based on the driving signal of a determined state type in all signal tracking rounds. Through the application, the efficiency and accuracy of locating the cause of an undetermined state signal are improved.
Owner:SHANDONG YUNHAI GUOCHUANG CLOUD COMPUTING EQUIP IND INNOVATION CENT CO LTD

Planning method, system, equipment, medium and product for producing hydrogen ammonia alcohol by using new energy

The embodiment of the invention relates to the technical field of new energy system design, and discloses a planning method, system, equipment, medium and product for producing ammonia alcohol by using new energy, the planning method comprises the following steps: importing a system simulation model for producing ammonia alcohol by using new energy; a scheme generation step; a scheme verification step; re-executing the scheme generation step and the scheme verification step based on the optimized planning algorithm to generate a new planning scheme and a corresponding simulation result; and after iterating for several times, outputting a plurality of planning schemes and corresponding simulation results so as to select an optimal planning scheme from the planning schemes. The method is based on an optimization-simulation iterative framework, provides scientific decision support for planning of the new energy hydrogen-to-ammonia-alcohol system, has the advantages of simple system, flexible deployment, stable operation and low cost, and realizes economical planning of the new energy hydrogen-to-ammonia-alcohol.
Owner:SHANGHAI KELIANG INFORMATION ENG

Ansys-based brake disc thermosetting coupling analysis method

The invention discloses an Ansys thermosetting coupling analysis method for a brake disc based on Spaceclaim, relates to the technical field of brake disc thermosetting coupling simulation, and aims at solving the problems that an existing racing car brake disc thermosetting coupling analysis method is complex in working condition, large in calculation amount and not easy to operate. The method is technically characterized by comprising the steps that firstly, a brake disc and friction plate model is established and imported into finite element analysis software Ansys, materials are selected for the brake disc and the friction plate, material attributes are input, and the step number and time are set; 2, boundary conditions are applied, force generated by braking is regarded as a linear process, and braking force is applied; step 3, repairing the distorted grid; 4, defining a contact surface as friction, a formula as a generalized Lagrangian method, updating rigidity as each iteration, and the rest as program control, setting a connection mode as geometry-ground, and a type as revolution; and 5, temperature distribution and deformation quantity are obtained through thermosetting coupling analysis.
Owner:HARBIN INST OF TECH AT WEIHAI