44results about How to "Reduced simulation time" patented technology

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 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 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 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.

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.

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 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 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.

The present invention provides a mechanical optimization analysis and design system and method for steel-concrete connectors of concrete poles, which relates to the technical field of concrete optimization design, including a multi-scale modeling module, a nonlinear material model module, an adaptive grid refinement module, a parallel computing module, a dynamic boundary condition module, and a user interface module. The multi-scale modeling module is used to accurately couple microstructure information to a macro model, which significantly improves the accuracy of the model and makes the simulation results closer to the actual situation. The high-precision modeling is particularly outstanding in capturing the micromechanical properties and overall mechanical behavior of steel-concrete connectors. The system realizes multi-level iterative optimization of the simulation model, ensuring the high accuracy and high reliability of the simulation results. In addition, the simulation result prediction and optimization method based on deep learning significantly shortens the simulation time while maintaining a high prediction accuracy.

This invention discloses a rapid beamforming method for large antenna arrays based on partitioned calibration and proximity coupling, belonging to the field of antenna design and electromagnetic simulation technology. It aims to obtain the actual realized gain pattern of large mutually coupled arrays at low cost and high speed. This invention models the array in differentiated regions: precise simulation of local coupling is performed on edge elements, while data reuse is achieved for central region elements using a pre-calibrated equivalent model. After acquiring the electric field data of each element, a global optimization algorithm based on the mutually coupled environment is used to directly solve for the element excitation distribution that optimizes beam pointing performance, and the actual realized gain pattern conforming to the actual port matching state is quickly synthesized. Simulation results show that, while maintaining accuracy similar to full-wave simulation, this invention only requires simulating a small number of key elements to efficiently synthesize the radiation pattern of a large-scale array, significantly improving design efficiency.

A control circuit for a photovoltaic inverter with reference current regulation is characterized in that: the control circuit of the inverter includes a power limiting unit, an active reference current generating unit, a reactive current injection unit, and a coordinate transformation unit; wherein, the power limiting unit provides reactive and active reference voltages to the control circuit, and generates reactive and active reference currents based on the voltages; the active reference current generating unit selects and generates a new active reference current according to the fault condition of a decrease in the output voltage of the photovoltaic power generation system; the reactive current injection unit provides compensation for the reactive reference current according to the fault condition of a decrease or increase in the output voltage of the photovoltaic power generation system; the coordinate transformation unit performs coordinate transformation on the compensated reactive reference current and the new active reference current, and outputs it to the PWM unit to realize the control of the inverter by the PWM unit and realize high and low voltage ride-through.

The invention belongs to the technical field of underwater cooling and thermal management, and particularly relates to an oil-immersed cooling underwater frequency converter temperature field simulation method and system, and the method comprises the steps: building a geometric model of an underwater frequency converter and an internal fluid domain model of the underwater frequency converter; carrying out grid division on a solid grid and a fluid domain of the underwater frequency converter model, and setting material attributes; setting a contact type and a friction condition between objects in the underwater frequency converter; the environment temperature of the underwater frequency converter, the convection coefficient of a shell and seawater, the natural convection and heat transfer coefficient of internal oil and the thermal load of each heating module are set, and the overall heat dissipation performance is verified and optimized through simulation. The technical problems that in the prior art, due to the fact that the thickness of a shell of a pressure-resistant cabin is large, the heat conduction path is long, the heat dissipation efficiency is low, and local overheating is caused due to the fact that the pressure-resistant cabin cannot adapt to water temperature changes and complex distribution of heating devices are solved; the heat dissipation simulation accuracy is improved; and the overall heat dissipation performance is optimized.

The application relates to a flexible remote sensing satellite attitude maneuver planning method based on an improved adaptive pseudospectral method, relates to the technical field of flexible remote sensing satellite attitude control, and solves the problems that the existing method is prone to causing a large increase in the number of grid refinements, inevitably increasing the number of iterations, consuming more on-board computer resources, and further reducing the on-orbit application efficiency of a satellite, and the like, and comprises the following steps: firstly, combining satellite dynamics, kinematics and a vibration equation of a flexible accessory, a rigid-flexible coupling state space equation for an optimal control method is established; secondly, on the basis of establishing an optimal objective function containing algebra-differential constraints, control torque constraints, angular momentum constraints, path constraints and the shortest time, an improved hp adaptive pseudospectral method is used to convert an optimal control problem into a nonlinear programming problem for solving. The method can generate an optimal trajectory meeting various constraint requirements in the shortest time, and compared with a traditional hp adaptive pseudospectral method, the method is shorter in time consumption under the same precision and has higher solving efficiency.

The invention discloses a vector simulation method and device, electronic equipment and a storage medium, and relates to the technical field of optical metasurs.The vector simulation method comprises the steps that mapping calculation is conducted according to a preset scalar phase to obtain structural parameters of a target metasurface optical element; the structure parameters are input into a preset vector simulation model, a vector near-field simulation result of the target metasurface optical element is obtained, far-field lighting effect information of the target metasurface optical element is obtained according to the vector near-field simulation result, and the vector simulation model is a trained neural network model. The vector simulation speed for the metasurface optical element can be increased, and meanwhile consumption of computing resources is reduced.

The invention belongs to the technical field of power system frequency response, and particularly relates to a virtual control unit frequency response credible capacity quantification method. According to the method, multiple types of power distribution side distributed resources are aggregated into a virtual control unit; constructing a distributed resource individual characteristic model, and simulating a running state; establishing a frequency response capacity evaluation model of the resource individuals in combination with the resource characteristics and the operation state; analyzing the selected resource graphical description feasible region to form a frequency response capacity analysis and evaluation method of a resource individual; establishing a virtual control unit frequency response credible capacity quantification model based on confidence and Monte Carlo simulation; and carrying out simulation analysis on the virtual control unit frequency response credible capacity quantitative model, and determining credible capacities under different confidence coefficients. According to the method, frequency modulation resources in shortage of the system can be effectively supplemented, and the frequency response credible capacity of the virtual control unit aggregating various power distribution side distributed resources can be accurately evaluated.

The application discloses an inductance winding optimization method based on finite element simulation software, relates to the technical field of converters, and first obtains the impedance of each turn winding by using the finite element simulation software, then arranges the winding by programming, matches the impedance of each parallel winding by using winding series connection, makes the parallel winding current as evenly distributed as possible, reduces winding loss, combines the simulation tool with theoretical calculation, and can quickly and accurately find the optimal arrangement mode of the inductance winding, compared with a solving method based on a theoretical loss model, can avoid a complex theoretical solving process and has higher precision, and compared with a solving method based on the finite element simulation software alone, can save a large amount of simulation time.

The invention discloses an FPGA-oriented single event effect software simulation method and system. The method comprises the following steps: determining a signal list which may generate a single event effect for an FPGA; a single-particle simulation module sets a single-particle injection position and time for the signal list; generating a test case for simulating single-particle injection according to the single-particle injection position and time; the single event effect simulation controller loads the test case into the FPGA and operates FPGA simulation; a result analysis module observes a corresponding FPGA signal at a single event effect injection moment; the result analysis module analyzes a single event effect injection simulation result and generates a traceable waveform; and after the test case is completed, the single event effect simulation controller controls the single event simulation module to generate a next test case until the test cases of all the signals in the signal list are completed. The single event effect simulation time can be greatly shortened, the single event effect simulation efficiency is effectively improved, and meanwhile the coverage range of single event effect simulation is widened.

The invention discloses an accelerated convergence method for aerodynamic numerical simulation of an aircraft, which only needs to add a function for judging and correcting the variable quantity of the physical quantity of the current step after each iteration, and the original program is slightly changed. According to the method, the target of dynamically adjusting the local CFL number according to the local flow field change is achieved, the dependence of a program on the experience of a user is reduced, and the robustness and the calculation efficiency of the numerical simulation process are improved.

This invention provides a surface adaptive lifting method, relating to the field of workpiece heat treatment technology, comprising: S1, determining model parameters; S2, creating a geometric model and meshing; S3, establishing a coordinate system within the meshed geometric model set; S4, dividing the tooth surface of a large-module rack into three parts and continuously adjusting the sensor movement speed in each region to solve the dynamic temperature field distribution; and S5, using a tooth surface path adaptive speed regulation method to complete the heating process in the deceleration zone, transition zone, and acceleration zone. This invention cleverly utilizes a tooth surface path adaptive speed regulation method, enabling intelligent adjustment of the large-module rack's temperature consistency under varying sensor speeds, thus optimizing the traditional moving induction heating simulation method which suffers from difficult speed control and complex calculations.

The invention discloses a printing method and device of chip software and hardware simulation character strings, equipment and a medium, and relates to the technical field of chip embedded simulation, and the printing method of the chip software and hardware simulation character strings comprises the following steps that S10, a preset printing function is executed in response to a printing instruction, obtaining a character string needing to be printed according to the obtained character string address; wherein the preset printing function is edited based on a character string address; and step S20, printing the obtained character string. According to the method, the original printing function based on one-by-one printing of the single characters is modified into the printing function based on the character string address, and when the instruction of printing the character string is executed, the time required for printing can be shortened, so that the simulation time can be saved, and the simulation efficiency can be improved. In addition, too many resources of the chip CPU are not occupied when the serial port is written.