286 results about "Bench test" patented technology

The invention discloses an automobile chassis lightweight structure design method based on topological optimization, and relates to the technical field of lightweight design. Constructing a macro-micro coupling model, and simulating and quantifying material parameter fluctuation by using Monte Carlo; establishing a rigid-flexible coupling multi-body dynamic model, simulating working conditions such as braking and turning, and generating a load spectrum by using a rain flow counting method; constructing a multi-objective function containing light weight, rigidity and modality, and solving manufacturing constraints such as pattern draft and the like by using an NSGA-II (Non-dominated Sorting Genetic Algorithm-II) algorithm; dividing steel, aluminum and carbon fiber material domains; and fusing bench test data to correct the model. According to the method, multi-scale collaborative optimization is realized, dynamic loads are accurately mapped, and light weight and performance are balanced; the connection reliability is improved through the multi-material gradient design; manufacturability is ensured through feature recognition and process verification; the batch consistency is guaranteed by digital twinning and robustness optimization; the chassis design efficiency and quality are integrally improved, and the service life is prolonged.

The invention provides a nodular cast iron material and a preparation method and application thereof. The preparation method of the nodular cast iron material comprises the following steps that S1, a mixture of pig iron, low-manganese waste steel and foundry returns is heated to be completely molten, alloy and auxiliary materials are supplemented and adjusted to target components, and base iron is obtained; s2, a spheroidizing agent is added into the base iron to conduct spheroidizing treatment, ladle-to-ladle inoculation is conducted after spheroidizing treatment, and an efficient inoculant is added during ladle-to-ladle inoculation; s3, pouring is conducted, and during pouring, a long-acting stream inoculant is added for instantaneous inoculation; and S4, carrying out vibration aging treatment to obtain the nodular cast iron material. According to the nodular cast iron material, collaborative upgrading is achieved in the three dimensions of graphite form-matrix strength-thermal stress dissipation, in a bench test, the number of hot cracks is greatly increased, the service life is obviously prolonged, and reliable guarantee is provided for braking safety of heavy vehicles.

A vehicle system receives indication of a newly trained machine learning model designated for validation. The system load a copy of the model into shadow execution hardware, capable of background execution of the model and subscribes to one or more data topics to which input data for the model, gathered by a vehicle data gathering process, is published. The system executes the model in the background as the vehicle travels, using data published to the data topics and benchmarks output from the model to determine whether the model outperforms a prior version of the model, that represents the model prior to the model being newly trained, based on relative performance of both models compared to performance expectations defined in a configuration file stored by the vehicle. Also, the system, responsive to the model outperforming the prior version of the model based on the performance expectations defined by the configuration file, validates the model as suitable for deployment.

The invention relates to a noise simulation testing method and device of a vehicle and electronic equipment, and relates to the technical field of vehicles, in particular to the technical field of simulation testing, and the method comprises the steps: obtaining the sound power level data of a bench test of a to-be-tested electric drive system; constructing a noise simulation model of the target vehicle, and determining an electric drive noise excitation source in the noise simulation model based on the sound power level data; and performing a noise simulation test based on the noise simulation model to obtain a noise simulation test result. The noise excitation source in the electric drive shell is determined based on the bench test result, electric drive actual excitation of the vehicle under different working conditions can be better reflected, and then the accuracy of the noise simulation result is improved.

The invention provides a vehicle diesel engine bench simulation emission test method, system, device and medium, and belongs to the bench test technology field, a test bench and a test device are configured, a flowmeter and an analyzer are calibrated through a linear regression equation, and a mapping relation between a measured value and an output quantity is established; an engine transient working condition model is constructed based on real vehicle data, and mapping of the rack control process and the real vehicle operation working condition is achieved; configuring the rotating speed, the torque, the air inlet temperature and the air inlet humidity controlled by the rack as boundary conditions, evaluating the control following performance through a correlation coefficient calculation mode, and verifying the environmental parameter consistency based on a mean value deviation; calculating the exhaust flow, and configuring measurement data based on the intake flow and the fuel consumption; executing a transient test, and obtaining real-time data of an engine running state and discharged pollutants; and under the condition that the double boundary condition constraints are met, carrying out equivalence analysis on a rack and a real vehicle emission result.

The invention belongs to the technical field of driving system simulation, and provides a hybrid vehicle driving assembly NVH simulation method and system and application, and the method comprises the steps: building a transmission system model, a structure-electromagnetic coupling model and a suspension system model; coupling the transmission system model and the structure-electromagnetic coupling model, constructing a rigid-flexible coupling model, and constructing a motor simulation model; electromagnetic excitation output by the motor simulation model is imported into a rigid-flexible coupling model, and the rigid-flexible coupling model integrates electromagnetic excitation and mechanical excitation to serve as an input excitation source of the suspension system model; and the suspension system model receives the vibration response from the rigid-flexible coupling model to obtain a drive assembly NVH simulation result, and corrects and optimizes the rigid-flexible coupling model in combination with a rack test result to complete hybrid vehicle drive assembly NVH simulation. According to the method, the high requirement of NVH development of the hybrid power system can be met, and the problem that an existing simulation model does not conform to the reality is solved.

The invention relates to a distributed electric drive endurance load spectrum generation method and system. The method comprises the following steps: constructing a distributed electric drive whole vehicle simulation model; constructing a working condition database, wherein the working condition data comprises a plurality of working conditions and a torque distribution strategy corresponding to each working condition; constructing a simulation parameter database of the distributed electric drive whole vehicle based on the vehicle model information of the distributed electric drive whole vehicle; loading the working condition database and the simulation parameter database to the distributed electric drive whole vehicle simulation model to obtain original load data; and carrying out calculation processing on the original load data to generate a standard load spectrum for life check and bench test. According to the method, multiple torque distribution strategies are considered, and the working conditions, the torque distribution strategies and the whole vehicle parameters are associated, so that the generated load spectrum better fits the actual use scene. Therefore, the durability and reliability of the distributed electric drive system and the sub-components thereof can be evaluated more accurately by carrying out life check and bench test on the basis.

The invention relates to the technical field of artificial intelligence, can be applied to business scenes of financial science and technology, medical health and the like, and discloses a benchmark test-driven prompt word tuning method, device, equipment and medium, and the method comprises the following steps: analyzing input data to generate a benchmark test set; generating a cue word parameter configuration set based on the benchmark test set; calling a language model interface to process the input text to obtain a model output set; comparing the model output set with expected output to generate a comprehensive performance index set; updating a cue word parameter configuration set according to the comprehensive performance index set; and judging whether a termination condition is met or not, if not, continuing to execute model calling and parameter updating, and if yes, outputting a target cue word configuration and optimization report. According to the method, a structured evaluation and parameter iteration mechanism is introduced, cue word optimization is converted into a systematic process from artificial experience driving, repeated trial and error are reduced, cue word tuning efficiency is improved, and stability and mobility of the model in different tasks are achieved.

The utility model discloses a bench static load test device, and relates to the technical field of bench test equipment, and the bench static load test device comprises a test bench, the test bench is slidably connected with an installation box, the installation box is connected with a pressure sensor, the pressure sensor is connected with a pressure plate, the test bench is connected with a first driving assembly and a second driving assembly, and the first driving assembly and the second driving assembly are connected with the bench. The first driving assembly is used for driving the mounting box to slide in the Z-axis direction, and the second driving assembly is used for driving the mounting box to slide in the X-axis direction. The first driving assembly drives the pressure plate to slide in the direction close to the stool, the pressure plate abuts against the stool and applies force to the pressure sensor, the pressure sensor can know the pressure value of the pressure, the steps are repeated, and the pressure plate and the pressure sensor test each stool surface of the stool. After the test, the chair does not have obvious damage and permanent deformation, the chair meets the standard, and otherwise, the chair does not meet the standard. And the bench is automatically tested, so that the efficiency of testing the bench is improved.

The invention discloses a marine engine manufacturing full-process decision prediction method combined with machine learning, and relates to the technical field of marine engine manufacturing and testing. The method solves the problems of model prediction deviation, confidence coefficient imbalance, response lag and the like caused by difference between a bench test and a sea test environment in key working condition feature statistical distribution, selects an adversarial domain adaptation or confidence calibration algorithm for model training, constructs a prediction model based on a deep neural network, and improves the prediction accuracy. Through adversarial optimization or post-processing calibration of the feature extraction network, the main task prediction sub-network and the domain discrimination sub-network, the generalization ability and confidence reliability of the model are improved, the model is deployed in a sea test environment and verified in real time, and closed-loop decision control is executed based on a model prediction result by calculating an error index of a predicted value and a measured value. Through data layer alignment, model layer adaptation, verification layer verification and execution layer control, the prediction accuracy and operation safety of the marine engine in the sea test stage are remarkably improved.

The invention belongs to the field of wheel road tests and bench tests, and particularly relates to a wheel bench impact test method and system equivalent to test field road impact. The method comprises the following steps: determining a road impact condition of a vehicle for road test; the road impact working condition is reproduced; in the reproduced road impact working condition, simulation prediction of rack impact test energy is carried out; and generating a bench impact test scheme based on a simulation prediction result. Compared with a traditional road test, the method has the same test effect, the test period can be greatly shortened, test resources and cost are saved, potential risks of the wheel road test are found in advance, and a necessary rapid test verification means is provided for wheel design and verification. The assessment of the road test on the wheel is equivalent to the bench test, the reliability of the road test on the wheel is verified before the whole vehicle road test, the risk of failure of the wheel in the whole vehicle road test stage is reduced, and the method is wide in application range, simple, reliable and low in cost.

The invention relates to the technical field of data acquisition, in particular to a road resistance time sequence data analysis method for an intelligent networked automobile test bed. The method comprises the following steps: acquiring an oscillation stationary characteristic value and a response decay time characteristic value of road resistance data; marking a response attenuation time characteristic value of the road resistance data according to a road resistance data difference and an oscillation stationary characteristic value between different road resistance data sequences, and obtaining a target measurement distance between the station test road resistance data in the station test road resistance data sequence and the road test road resistance data in the road test road resistance data sequence; and obtaining a difference evaluation result between the bench test road resistance data sequence and the road test road resistance data sequence according to the target measurement distance. And the accuracy and the credibility of difference or similarity evaluation between the bench test road resistance data and the real road test road resistance data can be improved.

This application belongs to the field of aero-engine design and presents a design method for high-altitude starting fuel supply patterns based on the low-altitude starting fuel supply patterns. It involves first conducting high-altitude bench tests on the starter to obtain the power reduction characteristics of the starter at different altitudes. Then, based on the power balance equation, the acceleration time of the starter from rotor standstill to idle speed is determined. Finally, based on the acceleration time of the starter from rotor standstill to idle speed, the time allocation of the three starting stages of the starting process—starter engagement, starter disengagement, and engine starting—is performed to obtain the high-altitude starting fuel supply pattern. This method enables rapid and accurate design of the high-altitude fuel supply pattern, taking into account the engine's stability margin design in high-altitude areas, starter power characteristics, and the attenuation characteristics of starter power with increasing altitude, thus avoiding abnormal phenomena such as engine cold suspension and overheating. Furthermore, it can be based on ground starting data statistics, achieving better design compatibility and reducing debugging work.

The application relates to a noise simulation test method and device of a vehicle and electronic equipment, relates to the technical field of vehicles, in particular to the technical field of simulation tests, and comprises the following steps: obtaining sound power level data of bench test of an electric drive system to be tested; constructing a noise simulation model of a target vehicle, determining an electric drive noise excitation source in the noise simulation model based on the sound power level data; performing noise simulation test based on the noise simulation model to obtain a noise simulation test result. The noise excitation source inside the electric drive shell is determined based on the bench test result, the actual excitation of the electric drive under different working conditions of the vehicle can be better reflected, and the accuracy of the noise simulation result is improved.

The invention provides an air filter blockage detection method, a vehicle and a storage medium, and relates to the technical field of vehicles. The method comprises the following steps: acquiring a plurality of target curves corresponding to the current working condition of a vehicle; wherein each target curve is used for representing the corresponding relation between the rotating speed of the supercharger and the supercharging pressure under different blocking degrees of the air filter, and the target curves are obtained based on a bench test; the current rotating speed and the current supercharging pressure of a supercharger of the vehicle are obtained; and based on the current rotating speed and the current supercharging pressure of the supercharger and the target curve, the current blocking degree of the air filter is determined. According to the technical scheme provided by the invention, the problem that the blockage of the air filter cannot be treated in time due to the fact that whether the air filter is blocked or not is difficult to detect in time in the prior art can be solved.

The invention discloses a method, a device and equipment for determining the output power of a power battery and a medium, and belongs to the technical field of battery simulation. The method comprises the following steps: constructing an equivalent circuit model corresponding to a target battery pack according to a circuit structure in the target battery pack; the circuit structure comprises each battery cell and a system connecting piece; internal resistances of at least two battery cells in the target battery pack are different; simulating the equivalent circuit model under each working condition, and obtaining the instantaneous power of the target battery pack when any battery cell is reduced to cut-off voltage; and based on the instantaneous power under each working condition, determining the limit output power of the target battery pack under each working condition. According to the scheme, the test can be carried out according to the more accurate minimum output power in the subsequent bench test and road test process, power prediction distortion and whole vehicle undervoltage faults are avoided, and the test effect of the whole vehicle is improved.

The application relates to a chassis angle system-based automobile brake judder bench test method, which comprises the following steps: S1, obtaining a chassis angle system and fixing the chassis angle system on a bench; S2, setting experimental variables; S3, setting changes of brake oil pressure and bench static torque motor torque; S4, controlling one experimental variable in friction plate wear rate, brake disc temperature, humidity and brake disc rotation direction, and not controlling other experimental variables, and performing brake judder experiments on the fixed chassis angle system; S5, obtaining sensor feedback data; S6, using vibration acceleration signals at brake calipers in the feedback data to analyze whether brake judder occurs, if not, returning to S4 to perform brake judder experiments again, otherwise, performing S7; and S7, analyzing various parameters of brake judder in the experiments based on the vibration acceleration signals at the brake calipers. Compared with the prior art, the application has the advantages of more comprehensively analyzing automobile brake judder and the like.

The invention discloses a control method, device and system for a diesel engine supercharger. The control method comprises the following steps that current state data of a diesel engine are obtained; according to the rotating speed of the engine and the fuel injection quantity, the current intake manifold required pressure is determined in a table look-up MAP mode; determining a correction coefficient according to the altitude; determining a demand pressure value according to the correction coefficient and the current intake manifold demand pressure; and the real-time air inlet pressure of the air inlet manifold is obtained, and the opening degree of the electronic throttle valve is controlled according to the required pressure value till the real-time air inlet pressure of the air inlet manifold is equal to the required pressure value. According to the method, the engine rotating speed, the oil injection quantity and the corresponding optimal required pressure are determined through the bench test when the real-time rotating speed of the supercharger is equal to the supercharger rotating speed limit value, the current required pressure of the intake manifold can be determined through table look-up in actual operation, and it is guaranteed that the supercharger does not overspeed; and the problem of engine power loss caused by fuel injection quantity reduction is avoided.

This invention provides a time-series control-based hard drive power-down testing method, computer program product, and system. The method includes: initializing the hard drive under test and a programmable power control unit; writing benchmark test data to the hard drive under test and generating corresponding data fingerprint information; executing a preset input / output load scenario and monitoring the internal operating state of the hard drive under test in real time; identifying key operation windows based on the internal operating state of the hard drive under test, and triggering a power-down command at a specified delay time within the key operation window to control the programmable power control unit to cut off power supply; after a preset recovery waiting time, controlling the programmable power control unit to restore power supply and monitoring the power-on recovery process of the hard drive under test; performing multi-level data integrity verification, including comparing the recovered data of the hard drive under test with the data fingerprint information; generating a test report based on the multi-level data integrity verification results, and determining that the hard drive power-down test is passed if the verification results are passed.

The invention discloses a clutch slip early warning method and system for an engine bench test. The method comprises the steps of collecting key signals in real time, calculating the theoretical rotating speed and slip rate, conducting primary judgment based on the rotating speed criterion, conducting secondary verification based on the torque criterion, conducting multi-parameter fusion decision making, executing early warning operation and the like. Through multi-sensor information fusion and double criterion verification, early warning and automatic safety protection of clutch slipping are achieved, the safety and automation level of the test are improved, meanwhile, data support is provided for health assessment of the clutch, and the test efficiency is improved. The problems of hysteresis, poor reliability and lack of evaluation ability in the prior art are solved.

The invention relates to a strength analysis method for a lower control arm of a heavy truck, and solves the problems that the design iteration period is prolonged and the cost is increased due to the fact that a deviation exists between a traditional analysis method and a real working condition and the strength needs to be verified through a large number of bench tests in the later period. Selecting a lower control arm front end point, a lower control arm rear end point, a spiral spring lower end point and a spherical hinge point from the initial finite element model as nodes for extracting loads, endowing material parameters of the lower control arm: an elastic model, density and Poisson's ratio, and laying a foundation for building a multi-body dynamic model; when the multi-body dynamic model is built, template models of tires, suspensions and flexible bodies are built, a whole vehicle assembly model is assembled, loading of a vertical bending working condition, a horizontal bending working condition and a torsion working condition is carried out, loads of all nodes are submitted, calculated and extracted, the loads are reversely loaded to a complete finite element model, and a strength analysis result of the lower control arm is obtained through calculation. A simulation analysis result is closer to a real vehicle reliability test result.

The invention discloses a multi-source data adaptive fitting method for a liquid hydrogen storage tank bench test, which comprises the following steps: synchronously acquiring multi-source sensor data in the liquid hydrogen storage tank bench test in real time, and preprocessing the data to obtain preprocessed real-time data; establishing a physical priori constraint equation based on a low-temperature thermodynamic law and a heat transfer mechanism, embedding the physical priori constraint equation into a data fitting objective function, performing physical constraint, and determining energy conservation, phase equilibrium and heat transfer boundary conditions required to be met by a fitting result; extracting data features of the preprocessed real-time data, matching the data features with a preset working condition feature library, and performing working condition identification to obtain a current test working condition identifier; adjusting regularization parameters by adopting an iteration method according to the current test working condition identifier, the data fitting residual error and the noise level; and carrying out data fitting by combining physical constraints, current test working condition identifiers and the adjusted regularization parameters, and inverting the state parameters in the storage tank. The algorithm can provide a reliable basis for design optimization and safety evaluation of the liquid hydrogen storage tank.

The invention discloses a rack test system for a vehicle air pump and an application method of the rack test system, and belongs to the technical field of vehicle air pump performance testing, the rack test system comprises a touch screen (1), an industrial personal computer (2) and a main control module (3), and the touch screen (1), the industrial personal computer (2) and the main control module (3) directly communicate through the Ethernet; the device further comprises a temperature control liquid temperature and pressure adjusting unit (IV), a lubricating oil temperature and pressure adjusting unit (V), a driving shaft power control unit (VI), a gas pressure measurement and control unit (VI) and a gas flow measurement unit (VII). And the main control module (3) is respectively connected with the temperature control liquid temperature and pressure regulating unit (IV), the lubricating oil temperature and pressure regulating unit (V), the driving shaft power control unit (VI), the gas pressure measurement and control unit (VI) and the gas flow measurement unit (VII). The parameters of the air pump for the test vehicle are quickly obtained through the control circuit and an efficient and safe control program.

The application discloses a kind of suspension simulation bench and test method, belong to automobile bench test field, comprising: road input part, road input part is provided with execution end;Long optical axis, long optical axis includes multiple, the first end of multiple long optical axis is connected with the top of road input part;Tire simulation part, tire simulation part is slidably connected with long optical axis, the first end of tire simulation part is connected with execution end;Shock absorber simulation part, shock absorber simulation part is slidably connected with long optical axis, the first end of shock absorber simulation part is connected with the second end of tire simulation part;Weight placement part, weight placement part includes weight placement platform, weight placement platform is slidably connected with long optical axis, the first end of weight placement platform is connected with the second end of shock absorber simulation part.The application guarantees precision while reducing size, reduces cost, can effectively simulate active, semi-active and passive suspension system dynamic performance, and the structure is reasonable and durable, can accurately and stably carry out suspension control algorithm experiment.

A rotor engine comprehensive bench test system and test method belong to the technical field of engine test. The system contains rotor engine, AC power dynamometer, main control unit and other groups of modules. The dynamometer can realize forward and reverse reversible rotation of the engine. The main control unit is provided with forward and reverse switching and three-stage alarm module. Each component is connected and communicated. Sensors, acquisition modules, analyzers and the main control unit are cooperatively networked. The test method sequentially completes bench building, system inspection, pre-starting verification, lubrication establishment, engine starting, top dead center searching, mechanical loss test, warming, full-range boundary monitoring, hot-state running-in, ECU online calibration and data evaluation. The combustion analyzer can calculate cylinder pressure parameters. ECU modified parameters take effect immediately. Data analysis covers power and economic indicators. The present invention solves the problem that existing benches cannot adapt to rotor engine tests, builds a safe and efficient comprehensive test platform and provides technical support for rotor engine research and development.

The invention provides an HIL bench test method for an automobile water valve, a controller, a medium and a program product, and the method comprises the steps: generating an active test model for testing a multi-way water valve, and adjusting the model parameters of the active test model; executing a water valve control test sequence based on the active test model to simulate a water valve passage under various working conditions; and obtaining HIL output parameters of the active test model after the execution of the water valve control test sequence is completed, and determining the performance level of the multi-way water valve according to the HIL output parameters. Therefore, the performance of the multi-way water valve under different working conditions can be tested through the water valve control test sequence by utilizing the adjusted active test model, and the accurate test of the control process of the multi-way water valve under different working conditions can be realized.

The invention relates to the technical field of clamping fixtures, in particular to a clamping fixture for a shock absorber bench test, which comprises a fixture body, a control body, a threaded rod, an elastic element, a connecting rod and a wedge block, and is characterized in that the control body is in threaded connection with the fixture body, the threaded rod is in threaded connection with the control body, and the elastic element is in threaded connection with the connecting rod; the connecting rod is arranged in the clamp body in a sliding mode, one end of the connecting rod is connected with the threaded rod, the other end of the connecting rod is in contact fit with the wedge-shaped block, and the portion, in sliding fit with the clamp body, of the connecting rod is provided with a non-circular section. The wedge-shaped block moves transversely due to movement of the clamp body relative to the control body, in addition, the purpose of guiding the wedge-shaped block to move along a preset path is achieved by arranging a matched structure of the containing groove and the inclined guide face, the overall structure is simple and compact, the equipment cost is remarkably reduced, and portability is improved.

The present invention aims to improve the efficiency of automobile development by front loading the evaluation of an on-road driving test, and comprises a virtual evaluation step of simulating the on-road driving test using a driving environment model which models a driving environment, an operating state model which models an operating state, and a vehicle model which models the actual vehicle; a bench test evaluation step of imitating the on-road driving test by combining a part or all of the actual vehicle, a part or all of the vehicle model, a part or all of the driving environment model, and a part or all of the operating state model, and conducting a bench test of a part or all of the actual vehicle, and an on-road driving test evaluation step of conducting the on-road driving test of the actual vehicle in a real driving environment.

The application provides a whole vehicle sound source noise target setting method, system, device and medium, relates to the NVH technical field, and the method comprises the following steps: firstly, obtaining the sound pressure level noise data of a test vehicle under a target working condition through a first bench test; then, respectively determining the sound transmission functions of the test vehicle and a target vehicle through a second bench test; then, performing frequency spectrum analysis on the sound pressure level noise of the test vehicle to obtain target sound pressure level noise in a specific frequency range. Combined with the sound pressure level noise of the test vehicle and the sound transmission function thereof, the sound source noise of the test vehicle is calculated; further, the target sound pressure level noise and the sound transmission function of the target vehicle are utilized to determine the sound source noise of the target vehicle; finally, according to the sound source noises of the test vehicle and the target vehicle, the sound source noise target value of the target vehicle is set. The application can effectively solve the problem that the bench test is inconsistent with the actual performance of the whole vehicle, and improve the accuracy and rationality of the sound source noise target setting.

The invention discloses a load translation control method for a hybrid diesel locomotive considering a diesel engine and a gas engine. The method comprises the following steps: in a ground bench test, respectively simulating typical operation conditions of the diesel / gas engine, and determining respective safe power fluctuation intervals; in the running process of the hybrid diesel locomotive, the output power of the diesel / gas engine is dynamically corrected based on the power fluctuation threshold value of the running data; and scene-based multi-energy load translation control is carried out, the scene comprises the dynamic operation characteristics of acceleration and deceleration of the train, and the engine power of the hybrid diesel locomotive is adjusted according to the working mode of the power battery and the power fluctuation difference value, so that the load translation of the hybrid diesel locomotive is met based on the engine power. According to the method, multi-energy cooperative control considering load translation, scientific and controllable threshold value and working condition adaptation is achieved, the comprehensive traction force of the hybrid diesel locomotive is improved, and energy conservation and emission reduction are achieved.