59results about How to "Reduced simulation time" patented technology

A CFD (computational fluid dynamics)-based wind turbine generator load simulation method under a high slope comprises the following steps: step 1, acquiring topographic data and position information of the high slope: acquiring the topographic data and position information of the high slope through a multi-source data acquisition means; step 2, constructing a high slope simplified physical model according to the high slope topographic data and the machine position information; 3, a CFD tool is used for flow field numerical simulation calculation, and according to the constructed high slope simplified physical model, the CFD tool is used for obtaining the wind speed distribution and turbulence intensity distribution conditions of the whole wind wheel face of the wind turbine generator; step 4, generating a target wind seed file by using a TurbSim tool; 5, establishing a high slope wind file library; step 6, calculating the dynamic response of the whole machine; and obtaining an accurate load result of the wind turbine generator under the high slope terrain. The accuracy of the simulation result is improved, and the safety, the power generation efficiency and the service life of the wind turbine generator are improved.

The invention provides a photoelectric sensor simulation platform and a synthetic aperture radar (SAR) imaging method in the simulation platform. The method comprises the following steps: step 1, subdividing a target three-dimensional model; step 2, acquiring a propagation path of a ray by using a ray tracing method homologous with that in an optical imaging system; and step 3, performing simulation calculation on the far-region scattered field of the target by using a bounce ray method, and performing data processing on the far-region scattered field to obtain a synthetic aperture radar image of the target. According to the technical scheme, the working frequency of the sensor simulation platform and the photoelectric sensor simulation platform is successfully expanded to the field of radar microwaves. Radar SAR and optical homologous simulation imaging lay a good foundation for subsequent research in the fields of image registration, feature fusion, target recognition and the like.

The invention discloses a high-precision integrated temperature sensor circuit and application, and relates to the technical field of integrated circuits, and the high-precision integrated temperature sensor circuit comprises a band-gap reference circuit, a buffer circuit, an analog-to-digital conversion circuit, a two-phase non-overlapping clock generation circuit and an FIR (Finite Impulse Response) digital filter. It needs to be explained that a key circuit sigma-delta modulator adopts an integrator cascade feed-forward structure CIFF, compared with a CIFB with a feedback structure, an STF function of an ADC of a feed-forward structure is close to 1, a peak value can appear only at a high frequency, only a very small error signal can pass through a whole loop, and therefore the stability of the analog-to-digital converter is greatly improved. Therefore, the gain of the amplifier in the first-stage integrator can be made relatively large, and noise and nonlinearity generated by the rear-stage integrator are effectively suppressed. Moreover, each stage of integrator does not process a feedback signal with high-frequency noise, so that the bandwidth requirement on the next stage of operational amplifier is reduced, the power consumption required by the CIFF structure is lower, and meanwhile, the output swing has better stability due to no feedback structure.

The invention discloses a real-time simulation method and device for a power transmission system, electronic equipment and a storage medium, which are used for solving the problem that the traditional electromagnetic transient simulation cannot completely meet the actual simulation analysis requirement of a power grid and cannot achieve a large-scale refined real-time simulation effect. According to the method, an on-chip system is adopted as a software and hardware collaborative acceleration platform of a power transmission system, and the software and hardware collaborative acceleration platform comprises a scalar engine and an adaptive engine; acquiring a main circuit and a primary sub-module circuit of the power transmission system; performing circuit segmentation on the first-stage sub-module circuit to obtain a plurality of second-stage sub-module circuits, and dividing the plurality of second-stage sub-module circuits into a plurality of first sub-module circuits and a plurality of second sub-module circuits; performing parallel simulation calculation on the simulation tasks of the second sub-module circuits through a scalar engine, and performing parallel simulation calculation on the simulation tasks of the main circuit and the first sub-module circuits through an adaptive engine; and outputting a power simulation result of the power transmission system.

The invention discloses a chip simulation acceleration method and system, and the method comprises the steps: 1, collecting all redundant design module names in a given chip, and obtaining a redundant design module name list; 2, inputting the redundancy design module name list into a preset automatic dummy module generation and replacement script, and updating a simulation file list; and 3, verifying the given chip according to the updated simulation file list. According to the method, the actual simulation scale of the chip can be effectively reduced, the simulation time can be greatly shortened, the simulation efficiency is effectively improved, and the delivery cycle of the chip is powerfully ensured.

The embodiment of the invention discloses a transient response simulation method and device of a power amplifier, equipment and a storage medium. According to the method, the temperature value of each stage of tube core of the power amplifier in a thermal stable state is determined, a preset variable is defined in a simulation environment, the variable quantity of the temperature value generated along with time in the working process of the power amplifier is simulated through the preset variable, and the preset variable is scanned; generating a curve of the gain value of the power amplifier changing along with the preset variable, calculating the slope of the curve, and adjusting the parameter information in the simulation circuit according to the slope. According to the transient simulation method, the junction temperature change of the power amplifier generated along with the change of the working time is utilized to influence the gain change characteristic of the power amplifier, and the time change is simulated through the temperature change, so that the problems of non-convergence and low simulation speed caused by time scanning in the existing transient simulation scheme are solved; the accuracy of transient response simulation of the power amplifier is effectively improved, and the simulation time is shortened.

The invention relates to the field of battery performance testing, in particular to a new energy automobile power battery pack performance testing method and system. The method comprises the following steps: acquiring a real-time monitoring log of the power battery pack; performing multi-period feature analysis on the real-time monitoring log of the power battery pack, performing operation scene inference, and generating battery pack operation scenes in different periods of time; extracting multi-dimensional battery pack operation state parameters based on the abnormal optimization real-time monitoring log; scene state matching is carried out on the battery pack operation scenes in different time periods based on the multi-dimensional battery pack operation state parameters, so that the operation state characteristics of each operation scene are obtained; and performing real-time operation condition analysis on the operation state characteristics of each operation scene, performing virtual condition modeling, and constructing a battery pack virtual operation condition model. According to the invention, efficient and accurate performance testing of the power battery pack is realized.

The invention relates to the technical field of chip simulation, in particular to a TCL script-based waveform dump method, which comprises the following steps of: defining a system, a subsystem / submodule of the system, a dump level of the subsystem module and a dump level of the dump level according to a verification requirement of a chip in a simulation command line and / or makefile, and representing the dump level by using parameters; compiling an execution script based on a tool command language, the execution script being used for identifying the parameter representation of the simulation command line to analyze the verification demand of the chip, the execution script converting the verification demand into an analysis code; and adding a parameter for starting a UCLI command line mode in the simulation command line, and calling the analysis code in the UCLI command line mode to perform waveform dump. According to the application, after the verification demand of the chip is given through the simulation command line or the makefile, flexible selection of the dump waveform is realized.

The novel application discloses an aviation fuel gear pump tooth tip clearance area pressure reconstruction analysis method, which comprises the following steps: step one: deriving an aviation engine fuel gear pump fluid domain three-dimensional model; step two: carrying out grid independence test and simulation calculation of multiple typical working conditions, and carrying out test verification on the calculation results; step three: combining a time function with a POD orthogonal basis to complete pressure reconstruction of the gear pump tooth tip clearance area. The simulation time of the fuel gear pump is reduced, the simulation calculation stability is increased, and the continuous change of pressure and other parameters on a smaller simulation time scale has obvious advantages. The specific work is that, for the tooth tip clearance area, the pressure of the selected plane part time observation point is analyzed by combining the POD modal analysis method, the continuous change value of the pressure under a shorter time interval is obtained, the time cost of the unsteady flow field calculation in the CFD is reduced, and the linear heat map and the spectrum analysis are used to find that the pressure of the tooth tip clearance periodically changes with the rotation of the gear.

The present invention relates to a crop leaf area index inversion method and system. The three-dimensional structure of crops in different growth periods is simulated by a crop growth model, and the canopy reflectivity under different planting parameters is simulated by a three-dimensional radiation transmission model. A neural network is trained by constructing a crop canopy reflectivity simulation data set. At the same time, the high spatial resolution crop leaf area index is inverted in combination with satellite remote sensing data. The method can effectively reduce the simulation time of the three-dimensional radiation transmission model, improve the inversion accuracy of the crop leaf area index, and realize near real-time monitoring of crop growth.

The invention relates to the field of simulation, and discloses a simulation convergence judgment method, electronic equipment and a computer readable storage medium. The method comprises the following steps: constructing a gas flow simulation equation in a target space based on the target space, wherein the target space comprises at least one return air inlet; simulating gas flow in the target space by utilizing iteration of the simulation equation; after each time of iteration of the simulation equation, at least one of the current space average temperature of the target space, the first average value of the target space, the current air opening average temperature of all the air return openings and each second average value corresponding to each air return opening is obtained; and in response to the condition that the preset condition is met, determining that the result of the simulation equation meets convergence, and stopping iteration of the simulation equation. In this way, the accuracy of simulation convergence judgment can be improved.

The invention relates to the technical field of chip interconnection path verification, and relates to a verification method and system. The method comprises the following steps: determining a pin name from a pin file through a script program according to a core function or an extended function of a pin to be verified by a user; according to the name of the pin, determining a trigger target name and a function keyword of the pin through a script program; when the script program determines that an interconnection path corresponding to the pin does not have time delay based on the pin name, controlling the script program to construct a first interconnection path file based on the pin name, the pin triggering target name and the pin function keyword; and inputting the first interconnection path file and a first constraint file in the script program into a verification tool, and controlling the verification tool to verify the first interconnection path file. According to the method, the verification efficiency of the interconnection path is improved.

The verification method disclosed in the present invention is used for on-board FPGA reconfigurable software verification. The verification test method comprises: a main control board receives a reconstruction configuration file and a verification test configuration file from a host computer; a first FPGA of the main control board stores the received configuration file in a main control board storage system, and performs a verification test execution reload program and a configuration release of a reload program of an FPGA to be tested according to actual test board requirements; a test execution FPGA of the test board calls a test execution FPGA reload program to generate a test execution FPGA dynamic test stimulus, and applies the dynamic test stimulus to the FPGA to be tested to perform a prototype verification test; the FPGA to be tested gives a test stimulus feedback to the test stimulus, and uploads and feeds back the test result through an interface control system; the host computer receives the FPGA verification test result for comparison and analysis to obtain the fault type and fault location, and at the same time, dynamically adjusts the verification file for the found or potential fault through a file configuration operation.

The invention belongs to the technical field of motors, and discloses a method for calculating the radial force of a switched reluctance motor in a multi-type air gap eccentric state, and the method comprises the following steps: S1, building an inductance parameter sample set of a hub switched reluctance motor in an air gap eccentric state; s2, establishing a nonlinear model of the hub switch reluctance motor in an air gap eccentric state; s3, establishing a radial force calculation model of the hub switched reluctance motor in an air gap eccentric state; and S4, verifying the effectiveness of the radial force calculation model under the air gap eccentric state of the switched reluctance motor by the established radial force measurement rack. According to the method for calculating the radial force of the switched reluctance motor in the multi-type air gap eccentric state, the change characteristics of the radial force of the switched reluctance motor with different structure parameters in the multi-type air gap eccentric state are fully considered, and the radial force of the switched reluctance motor with different structure parameters in the air gap eccentric state can be accurately calculated; and the simulation time of the three-dimensional finite element model of the switched reluctance motor is reduced.

The application discloses a kind of fast simulation method of ion scattering track cluster driven by bypass factor, including constructing basic radiation parameter table;According to the basic radiation parameter table, search discrete energy point, form lookup table;According to the variation of bypass factor of each discrete energy point in lookup table, determine the scattering angle distribution characteristic parameter corresponding to discrete energy point, and generate scattering angle sample based on scattering angle distribution characteristic parameter and store in scattering angle sample pool;Initialize three-dimensional grid, set the initial position and direction of incident ion;Carry out incident ion transport and energy deposition cycle;Parallel execution of the simulation task of multiple incident ions, respectively in independent three-dimensional grid copy incident ion transport and energy deposition cycle, finally all three-dimensional grid copy is obtained Total dose distribution.This method achieves optimal balance between calculation efficiency and accuracy, so as to generate high-fidelity three-dimensional dose distribution chart.

The present application discloses a reliability simulation method, a reliability simulation device, a simulation equipment and a non-volatile computer-readable storage medium. The method includes obtaining a periodic interference signal of an electromagnetic interference signal; performing a Gaussian mixture simulation on the obtained periodic interference signal of the electromagnetic interference signal to obtain a Gaussian mixture interference signal time domain function; converting the periodic interference signal into a rectangular pulse signal according to the Gaussian mixture interference signal time domain function and a preset acceleration factor model, wherein the preset acceleration factor model is the ratio of the expected failure time under normal working conditions to the actual failure time under preset accelerated stress conditions, and the preset acceleration factor model satisfies the degradation consistency condition; and using the rectangular pulse signal as an input boundary condition, inputting it into a preset simulation software to simulate a preset number of times, so as to output the degradation rate of the transistor to be simulated, and the degradation rate is configured to characterize the reliability of the transistor to be simulated. In this way, the simulation result can accurately reflect the reliability of the transistor to be simulated.

This invention discloses a high-performance computing-based system and method for evaluating colorectal cancer screening strategies, belonging to the field of medical information processing technology. It includes: a dual-pathway disease model module supporting both adenoma-carcinoma pathways and serrated adenoma pathways, modeled using age-dependent normal distribution progression time; an individualized risk scoring module integrating risk factors such as family history, inflammatory bowel disease, obesity, and diabetes; a screening strategy simulation module supporting combined screening strategies using different tools, employing compliance parameters specific to the Chinese urban population; a high-performance computing module using Numba JIT compilation technology for acceleration, multi-process parallel processing for further acceleration, and data structure optimization such as integer age to reduce memory usage; and a health economics evaluation module calculating indicators such as QALY, LYG, and ICER. This invention achieves significant performance improvements while maintaining model accuracy, greatly reducing simulation time for large-scale populations.

The invention provides a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery compartment, which comprises the following steps: carrying out full-power charge-discharge thermal simulation analysis on a single liquid-cooled battery pack to obtain a simulation analysis result of a battery cell module in the single liquid-cooled battery pack; performing flow and flow resistance simulation analysis on the liquid cooling pipeline in the battery cabin to obtain a simulation analysis result of the flow and flow resistance of the liquid cooling pipeline in the battery cabin; counting the maximum flow and the minimum flow of a liquid cooling plate of a single liquid cooling battery pack according to the simulation analysis result of the flow resistance of the liquid cooling pipeline in the battery cabin; respectively carrying out full-power charging and discharging thermal simulation analysis on the single liquid-cooled battery packs under the conditions of the maximum flow and the minimum flow to obtain the temperature difference of the battery cell modules in the battery cabin; according to the temperature difference of the battery cell modules in the battery compartment, whether the heat dissipation system of the battery compartment meets the design requirement or not is judged. The method is easy to implement, and has the advantages of being rapid in analysis, saving computing resources and improving the design and development efficiency of the battery compartment.

The invention discloses a universal method for accelerating EDA (Electronic Design Automation) simulation speed, which comprises the following steps: S1, preparing information required by chip simulation or verification, the information comprising a design file, a process file and last-round simulation or verification data; s2, after the information preparation is completed, according to a simulation or verification type needing to be performed, determining a proper EDA tool, starting the tool, and reading information including a design file, a process file and previous simulation or verification data so as to perform chip simulation and verification; and S3, exporting a simulation or verification result, and exporting simulation or verification data of the round. The invention discloses a universal method for accelerating EDA (Electronic Design Automation) simulation speed, which is a new method for accelerating calculation or reducing calculation amount by introducing previous-round simulation or verification data in a current-round simulation or verification process, and exporting a database for accelerating next-round simulation or verification in the current-round simulation or verification process. And the simulation or verification time is greatly reduced.

This invention relates to the field of sliding bearing simulation and optimization technology, and more specifically to a high-precision simulation and optimization design method for hydrostatic thrust sliding bearings. It establishes an efficient decoupling model of the fluid-solid-thermal three-physics field of the hydrostatic thrust sliding bearing, decomposing the overall thermodynamic field into two subfields, which are coupled with the fluid force field and the solid force field, respectively. Then, it constructs a gap oil film flow / thermal field model and a friction pair deformation solid / thermal field model, achieving equivalent coupling through data transfer. The oil film control equations are iteratively solved to obtain oil film pressure, temperature, and flow velocity; the friction pair equations, including elastic constitutive and thermal strain equations, are solved to obtain their elastic and thermal deformations, with bidirectional data transfer achieving coupled iteration. Based on the above method, simulations are performed, establishing sub-models of oil film flow and friction pair deformation, using local interpolation and dynamic meshing to process the interface; the oil cavity is optimized based on the simulation results, parametric analysis is used to establish the mapping between structural parameters and lubrication performance, the objective function and constraints are defined, and the optimal oil cavity structure is obtained through algorithms.

The present invention relates to a rapid simulation method, system and storage medium for assessing urban lifeline waterlogging risk. The method comprises obtaining key data; constructing a multi-layer superimposed grid model including a surface layer, an underground pipe network layer and a lifeline facility layer based on the key data; using the multi-layer superimposed grid model as a basis, using a numerical simulation method to pre-calculate the water depth distribution data under different rainfall intensities, and using a pre-calculation method to interpolate the water depth value under the actual rainfall intensity; superimposing the water depth value with the lifeline facility to calculate the flooding risk degree of the lifeline facility; and visually displaying the water depth distribution data and the flooding risk degree. The present invention realizes the pre-calculation and real-time interpolation of the water depth distribution under different rainfall conditions. Under actual rainfall conditions, accurate water depth distribution can be quickly obtained without complex real-time calculations, which greatly shortens the simulation time and provides efficient technical support for emergency response to urban waterlogging.

This invention relates to a design method for cross-flow ducts. A two-dimensional model of the axial cross-flow fan is created, meshed, and imported into a solver. Material properties, boundary conditions, and time steps are set, and the solver is run to monitor the volumetric flow rate Q at the cross-flow duct outlet. v The numerical change of Q v When periodic fluctuations are reached, the solver stops solving; then the time step is reduced, and the solver is run again; the noise model is enabled, and the solver is run again, outputting Q. v And A-weighted sound pressure level dB(A), finally selected Q v The design method identifies the range of variables to be designed when the airflow design requirements are met and the dB(A) noise design requirements are met. Within each range, the minimum value of the variable is selected as the optimal value. The cross-flow duct is then designed according to the optimal value of each variable. This design method is efficient and improves design reliability.

The invention discloses a method for predicting the longitudinal force of a tire based on finite element transient simulation. The method comprises the following steps: carrying out pure longitudinal slip simulation in finite element simulation software to obtain finite element simulation data, respectively carrying out steady-state simulation under a small slip rate and transient simulation under a large slip rate, and extracting a simulation calculation result; randomly generating a group of magic formula model parameters, and calculating an effective slip rate in combination with a slip rate sequence extracted by longitudinal slip scanning under a large slip rate; calculating a transient longitudinal force, an error between the transient longitudinal force and a simulation transient longitudinal force, and an error between the longitudinal force under a small slip rate and the simulation longitudinal force; optimizing and outputting the error between the transient longitudinal force and the simulated transient longitudinal force and the optimal parameter of the magic formula model when the error between the longitudinal force and the simulated longitudinal force under the small slip rate is minimum; and substituting the initial slip rate sequence into the optimized model, and calculating a steady-state longitudinal force. According to the prediction method, the longitudinal force of the tire can be predicted by using a small amount of simulation data, and the precision is high.

In the transformer inter-turn short circuit fault tracing method, storage medium and computer device provided in the application, an actual port current waveform when the transformer occurs an inter-turn short circuit fault is obtained; a plurality of estimated short circuit reasons of the transformer sent by a transformer user are received; a transformer finite element model is constructed, the transformer finite element model comprising a winding, the winding comprising a short circuit part and a non-short circuit part; for each estimated short circuit reason, the short circuit part and the non-short circuit part of the winding in the transformer finite element model are modeled in sections according to the estimated short circuit reason, the transformer finite element model after the modeling in sections is used to simulate the estimated short circuit reason, and a simulation port current waveform of each estimated short circuit reason is obtained; a cross-correlation coefficient of the actual port current waveform and the simulation port current waveform of each estimated short circuit reason is calculated, and an inter-turn short circuit fault reason of the transformer is determined according to each cross-correlation coefficient. In this way, the artificial detection cost can be reduced and the finite element model simulation time can be reduced.

The invention belongs to the technical field of nuclear reaction, and discloses a nuclear reactor physical numerical simulation method and system based on a CPU / GPU heterogeneous platform, and the method comprises the steps: assuming that each resonance nuclide adopts a subgroup fixed source equation needing to be solved for N times on average; according to subgroup transport calculation, circulation is carried out on each subgroup of each resonance nuclide in a calculation system, for M resonance nuclides, the number of calling times of a characteristic line method transport solver by a subgroup fixed source equation is MN, and characteristic line scanning calculation needs to be carried out for each calling; the MN subgroups are combined together to form a'multi-group 'structure; the multi-group structure is applied to subgroup fixed source transport calculation, feature line scanning is carried out in the whole multi-group structure at the same time, and fixed source flux of all subgroups is solved at the same time; a multi-group grouping calculation method is adopted, it is assumed that the number of energy groups adopted by final multi-group transport calculation is G, and sub-group fixed source calculation of a multi-group structure is conducted through existing multi-group transport variables.

The embodiment of the invention discloses a configuration method and device, a storage medium and a computer program product, and the configuration method comprises the steps: generating a configuration program of a register module in a to-be-tested chip through employing the structural features of a register address mapping distribution table; verifying the read-write function of the register module; under the condition that verification of the register module is passed, the register module is configured through the configuration program so that the to-be-tested module in the to-be-tested chip can be supported to execute function verification.

The invention discloses a method for efficient simulation of TACAN navigation, comprising the following steps: S1, defining coarse angular resolution and fine angular resolution; S2, calculating the signal propagation result by the initial first simulation sampling and recording it; S3, simulating the rotation antenna according to the fine resolution; S4, if the angle variation exceeds the coarse angular resolution, then performing electromagnetic propagation simulation calculation of the signal; S5, looping the intermediate sampling points according to the simulation result of the sampling point of the last simulation calculation and the simulation result of the sampling of the current simulation calculation, and obtaining the simulation result by interpolation calculation; S6, summarizing all the radio wave propagation results to obtain the simulated angle measurement result. The angle resolution of TACAN angle measurement is processed by the interpolation method, and the simulation analysis is performed using a larger coarse angular resolution. The angle resolution between the results of the two analyses is quickly obtained using the linear interpolation method, thereby reducing the calculation amount of the simulation processing to one tenth of the original amount, and greatly improving the processing efficiency of the simulation.

The present application relates to the field of chip technology, and specifically discloses a K value selection method and related equipment for the K-means clustering algorithm in chip simulation. The method includes: obtaining a first number of first program slices of a benchmark test program corresponding to a target chip, calculating a first type of performance indicator data for the first program slice; performing feature analysis on the first type of performance indicator data to obtain a corresponding feature classification result; performing calculations based on the feature classification result to obtain a corresponding maximum preset K value, and generating a K value range based on the maximum preset K value; sending the K value range to a preset K value selection model, receiving a target K value output by the K value selection model, and finally using the target K value in the K-means clustering algorithm in chip simulation to obtain a corresponding simulation result, which not only reduces the chip simulation time, but also ensures the accuracy of the chip simulation result.

The utility model discloses an automobile paint performance testing device. The automobile paint performance testing device comprises a brush, a motor, a sample tool, a PLC (Programmable Logic Controller) and a liquid spraying mechanism, the sample tool is arranged below the brush and is used for fixing an automobile paint plate sample; the brush is connected with an output shaft of the motor, the liquid spraying mechanism is used for spraying water flow containing smoke dust to the automobile panel during testing, and the PLC is a controller of the motor. According to the utility model, a sample can be repeatedly scrubbed under different environments and working conditions of a vehicle, such as mixed water added with dust and a vehicle washing medium, and the paint layer condition of the automobile panel sample after different scrubbing times can be observed, so that a reliable basis is provided for the real use performance of automobile paint, and research and development and production data can be provided for OEM.