489 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 discloses a combustion chamber wall surface pit array structure design method and a combustion chamber. The method comprises the following steps: extracting a three-dimensional fluid model and carrying out bench test; establishing and verifying an in-cylinder combustion and emission simulation model; performing temperature field bench test on the cylinder cover, the piston and the cylinder sleeve; establishing and verifying a heat transfer simulation model; establishing a heat engine coupling simulation model; parameterization design is conducted on the pit array structures on the piston, the cylinder sleeve and the cylinder cover, a collaborative optimization mathematical model of pit array structure design is established, an optimal solution set is obtained, and typical solutions are selected; key parts in the typical solution are machined, an installation test is carried out, and the optimal pit array structure design scheme is obtained through the test. According to the pit array structure obtained through the collaborative optimization design method, the weight of components can be reduced, a turbulent layer can be formed on the near wall face of the combustion chamber to promote oil-gas mixing, then nitric oxide and particulate matter are reduced, and the combustion performance of an engine is improved.

The invention provides an air conditioner testing method and device, a medium and electronic equipment, and relates to the technical field of air conditioners, and the air conditioner testing method comprises the steps that a to-be-tested air conditioner is tested in an enthalpy difference laboratory, and the outdoor environment temperature of the enthalpy difference laboratory is obtained; according to the outdoor environment temperature and different benchmark test parameters of the to-be-tested air conditioner, the benchmark power consumption is determined, and the different benchmark test parameters are obtained through testing after the to-be-tested air conditioner operates under different standard operation conditions; and determining energy-saving evaluation information of the to-be-tested air conditioner according to the reference power consumption. When the to-be-tested air conditioner operates in the enthalpy difference laboratory under the standard operation condition, the operation mode and parameters of the air conditioner are fixed, and dynamic adjustment in an energy-saving mode is not involved. Therefore, the reference power consumption is actually determined based on the hardware performance of the air conditioner, and the basic energy consumption level of the air conditioner to be tested can be represented. Therefore, the performance of the air conditioner can be evaluated more objectively through the reference power consumption.

The invention relates to a transmission shaft bench test device and method, and the device comprises a bumping sliding mechanism which comprises a pedestal, the pedestal is in sliding connection with a sliding platform through a sliding rail, and the pedestal is provided with a first actuator which drives the sliding platform to do reciprocating lifting motion in the length direction of the sliding rail; the side-tipping rotating mechanism comprises a side-tipping platform rotationally connected with the sliding platform through a rotating shaft, and a second actuator for driving the side-tipping platform to rotate around the rotating shaft is connected between the sliding platform and the side-tipping platform; the steering driving mechanism comprises a gearbox fixed on the roll platform, an input shaft of the gearbox is connected with a driving motor through a coupler, an output shaft of the gearbox is connected with a transmission shaft to be tested, and the transmission shaft to be tested is connected with a dynamometer. Performance and endurance tests of the transmission shaft under multiple working conditions can be simulated and detected more truly, and objectivity and accuracy of detection of the detected transmission shaft are improved.

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.

The invention discloses a multi-dimensional load spectrum acceleration compilation method for a vehicle frame based on a WLTC working condition, and the method comprises the following steps: setting rigid connection of the vehicle frame, and building a whole vehicle dynamics model; creating a WLTC event working condition, carrying out whole vehicle dynamics simulation, and extracting a load at a connection point; performing finite element analysis by using an inertial release method; carrying out fatigue life analysis on the frame, and extracting fatigue hot spot numbers; reconstructing an analysis process, and extracting stress time sequence data; carrying out pseudo damage analysis on the stress time spectrum to intercept an original load spectrum; carrying out smooth connection processing on the intercepted acceleration spectrum fragments; and performing power spectrum density analysis on the acceleration spectrum and the original spectrum, screening the acceleration spectrum according to a result, and finally obtaining the multi-dimensional load acceleration spectrum of the vehicle frame based on the WLTC working condition, thereby shortening the bench test time and reducing the development cost of the vehicle frame.

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 present invention discloses a test device for a tumbling pretreatment stand for bulletproof vests and a method for using the same. The device comprises a base, wherein universal wheels are respectively installed at the corners of the base, the bottoms of the universal wheels are in contact with the inner wall of the bottom of a walk-in environmental test chamber, the surface at one end of the base is connected to the two ends of a push rod, the surface at one end of the base is installed with a driving device, the driving device is connected to a conventional roller through a support plate, the outer ring of the conventional roller is in contact with two groups of symmetrically arranged roller frames, and the outer ring of the conventional roller is equidistantly provided with a plurality of first perforations. The present invention mainly solves the problem that when a combatant wears a bulletproof vest and performs various tactical actions (such as lying down, lying down, and rolling), the bulletproof vest will be deformed with the various tactical actions, causing the combatant to feel uncomfortable or even unable to wear the vest, thereby affecting the combatant's tactical actions and life safety. The present invention also solves the problem of extremely important quality performance testing of bulletproof vests in different battlefield environments.

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 utility model discloses a mounting assembly for enabling a test bench to adapt to a transmission, and belongs to the technical field of transmission testing. According to the utility model, the structure is simple and reasonable, and the installation problem of eight hole sites on the AT brake plate is solved by ingeniously simulating the design of a crankshaft adapter flange and carrying out two matched adapter flanges of '6-hole to 8-hole 'and '8-hole to 8-hole'; an existing MT rack support is subjected to hole cutting treatment to meet the requirement for installing an AT brake plate; the design of the mounting plate meets the hole site requirement of the AT transmission front casing. According to the utility model, bench test installation of an MT transmission and bench test installation of an AT transmission can be considered at the same time. As the structures of the gearbox support, the adapter flange, the simulated crankshaft assembly and the mounting plate are improved, the problems that the simulated crankshaft is not matched with an AT transmission brake plate and the mounting plate are not matched are avoided, the coaxiality of the brake plate, a hydraulic torque converter and a test bench driving motor during AT transmission test is kept, and the test bench meets the AT transmission test requirements.

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 simulation testing, and provides a multi-level scene coverage simulation testing method and a related device, and the method comprises the steps: carrying out the value combination of a road parameter, an environment parameter, an information parameter and an interaction parameter of scene coverage, and obtaining a scene space; constructing a test scene according to the test requirement and the scene space; and carrying out reproduction test on the test scene on the bench test system to obtain a test evaluation result of the intelligent driving system. The method integrates the advantages of a three-pillar verification method, is popular, can solve the bottleneck problem of the current expected function safety test demand, can achieve the high scene coverage of the intelligent driving system test, and also can improve the expected function safety performance and reliability of the intelligent driving system test.

The embodiment of the invention discloses a thermal insulation performance testing method, device and equipment and a medium. The method comprises the following steps: acquiring the current environment chamber temperature, and adjusting the initial position temperature of each candidate test position in a to-be-tested cab according to the current environment chamber temperature to obtain the candidate position temperature; when all the candidate position temperatures are the same as the current environment chamber temperature, the candidate position temperatures are updated based on the indoor heat supply amount in the air conditioner running state, and the reference position temperature is obtained; when the reference position temperature at the benchmark test position is the indoor temperature peak value, obtaining the reference position temperature at each candidate test position in the cab to be tested, and obtaining the target position temperature at each candidate test position after the preset test duration in the state that the air conditioner is turned off; and according to the reference position temperature, the target position temperature and the preset test duration, determining a thermal insulation test result of the to-be-tested cab. And the accuracy of testing the thermal insulation performance of the commercial vehicle cab is improved.

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 discloses an HIL bench test method and system for an electric differential lock controller, and the method comprises the steps: simulating a preset electric differential lock test condition through an HIL upper computer input condition, and outputting an electric differential lock switching signal through an HIL bench; the electric differential lock switching signal is input into an electric differential lock controller, the electric differential lock controller controls a differential lock motor to operate, and an actual result is obtained; and comparing the actual result with the expected performance, and testing the function of the electric differential lock controller. According to the method provided by the invention, the normal working and fault working scenes of the differential lock can be simulated through the HIL to verify the control logic of locking, unlocking and fault processing of the electric differential lock, so that the resource demand and the time period of function verification are reduced.

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 embodiment of the invention provides an oil supply system for a low-speed diesel engine bench test, which is provided with at least two lubricating oil cabinets, a first oil outlet header pipe, a second oil outlet header pipe, a test run line, an oil feeding line, a lubricating oil cooler, a first diesel engine and a second diesel engine, a first oil outlet valve and a second oil outlet valve of each lubricating oil cabinet are connected with a first oil outlet main pipe and a second oil outlet main pipe respectively, the test run line and the oil feeding line respectively comprise two output branches, the first test run output branch is connected with a crosshead lubricating oil pipe or a hydraulic oil pipe of a first diesel engine, and the second test run output branch is connected with the first diesel engine. The first oil feeding output branch is connected with a crosshead lubricating oil pipe or a hydraulic oil pipe of a second diesel engine, the second oil feeding output branch is connected with the second diesel engine, and all the parts are connected to a test run line and an oil feeding line through pipelines, so that multiple oil supply modes are met, and meanwhile, the two diesel engines can work in the same time period. One machine is used for feeding oil, and the other machine is used for testing.

The utility model relates to the field of new energy automobile chassis, and discloses a new energy automobile chassis control arm static tensile strength test device, which comprises a gantry upright post, an oil cylinder (with a force sensor), a gantry frame, a spring, a control arm body and a hydraulic power system, the oil cylinder with the force sensor is composed of a knuckle bearing lug, a knuckle bearing ball, a knuckle bearing, an oil cylinder body, a piston rod, the force sensor, a threaded fastener and a connecting fork rod. The control arm part is composed of a connecting block, a control arm body and a support. According to the utility model, the limit stress condition and durability of the control arm in a real vehicle state can be simulated, the rigidity influence of different material levels or single / double-plate type control arms can be evaluated, the verification accuracy of a bench test is high, and the lightweight design and development of each part of a chassis suspension can be guided.

The invention relates to the technical field of automobile noise simulation tire modeling, in particular to a tire model modeling method, device and equipment for whole automobile road noise simulation, and the method comprises the steps: building a tire structure model and a tire cavity inner vocal cavity model, and building a tire structure model and a tire cavity inner vocal cavity model on the basis of the tire structure model and the tire cavity inner vocal cavity model; establishing a coupling relationship between a tire structure and a sound cavity in a tire cavity, and obtaining a tire finite element model according to constraint conditions of tire ground contact ground; utilizing a test bench for coupling and expressing an intra-cavity acoustic cavity resonance effect and a preset tire transfer function of the intra-cavity acoustic cavity model of the tire to obtain a transfer function of a bench test; and obtaining an objective function through a correlation coefficient between the transfer function calculated by the finite element model and the transfer function tested by the bench, and carrying out iterative optimization on the objective function by taking the plurality of tire modeling parameters as optimization variables until a preset iteration condition is met, thereby obtaining the tire model for whole vehicle road noise simulation.

The invention discloses a bearing sealing ring bench testing machine which comprises a base, a turnover main machine, a hydraulic pump station and an electric control cabinet. The base is used for fixing and supporting the host; a fixing disc, a gear motor, a rotating ring, a fixing ring and a sealing ring fixing device are arranged on the turnover main machine; the hydraulic pump station is used for providing a pressure source for the testing machine; the electrical control cabinet is used for control operation of the testing machine; the fixing disc and the base are connected in a turnover mode, a gear motor is installed on the back face of the fixing disc, a rotating ring is installed on the front face of the fixing disc and driven by the gear motor, a fixing ring is arranged on the periphery of the rotating ring, a gap is reserved between the fixing ring and the rotating ring, and a sealing ring to be tested is installed on the inner ring of the fixing ring. And after installation, the lip of the sealing ring is contacted with the outer ring of the rotating ring. According to the invention, the actual use condition test condition can be simulated, so that the actual wear resistance, pressure maintaining capability, friction torque, temperature rise condition and sealing performance under the eccentric jumping condition of the sealing ring can be effectively fed back.

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 relates to the technical field of vehicle control, in particular to a braking friction coefficient self-learning method and device, a vehicle and a storage medium. The method comprises the following steps: obtaining bench test data of a vehicle, and establishing a preset braking temperature model by using a CAE technology based on the bench test data; actual driving information of the vehicle is obtained, and the current braking friction pair temperature is determined based on a preset braking temperature model and the actual driving information; and determining the current brake friction coefficient according to the current brake friction pair temperature. Therefore, by accurately acquiring the real-time temperature of the braking system before braking and matching the accurate braking friction coefficient according to the temperature, the calculated braking torque can be closer to the actual torque, and the problems that in the braking process, due to temperature rise, the feeling of a brake pedal is different, and deceleration output is affected are solved; therefore, the braking performance is optimized, and the stable and reliable speed reduction effect of the vehicle under various working conditions is ensured.

The invention discloses a bench test device and method for a vehicle-mounted pantograph and a storage medium, and relates to the technical field of traffic transportation, and the device comprises two supporting frame bodies and two actuators. Wherein each actuator is arranged on an upper cross rod of the corresponding supporting frame body; each actuator comprises a linear motor module and two cable fixing blocks arranged on a sliding block of the linear motor module; the linear motor module comprises a motor, a guide rail and a sliding block and is used for driving the sliding block to linearly move along the guide rail through rotation of the motor. Each cable fixing block is used for fixing a contact network cable; according to the invention, after the pantograph of the electrified road vehicle needing to be tested between the two support frame bodies is lifted in place, the two contact net lines in contact with the pantograph can be controlled by the actuator to move transversely, so that the test of the transverse following control function of the pantograph can be realized; the defects of the pantograph of the electrified road vehicle can be found in advance, and the research and development cost is reduced.

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 provides a wood pattern anchor pulling bench test device and test method. The wood pattern anchor pulling bench test device comprises a test bench for carrying a simulation ship body and an anchor system, the simulation ship body and a hawse pipe, and positioning and posture adjustment of the hawse pipe and an anchor mouth are completed through a push rod; the angle of the anchor mouth around the axis of the hawse pipe is adjusted by adjusting the initial butt joint position of the anchor mouth and the hawse pipe; under the working conditions of different hawse pipe and anchor mouth positioning and postures, the smooth condition of anchor lifting and dropping, the interference condition of an anchor fluke and a ship body outer plate on a rack and the fitting condition of an anchor and an anchor mouth are tested; a push rod is used for completing adjustment of transverse and longitudinal inclination angles of a simulated ship body, and transverse inclination and longitudinal inclination postures on the sea are simulated through combined adjustment of the transverse inclination angles and the longitudinal inclination angles of an anchor pulling test bed to carry out an anchor pulling and dropping test; by means of the angle indicating dial, the initial anchor weighing angle can be adjusted within the range of 0-180 degrees in the plane, the random anchor weighing angle is simulated to conduct the anchor pulling test, and by means of the onshore adjustable wood mold anchor pulling test, the correctness of anchor system design and the reasonability of installation are verified.

The invention provides a durability evaluation method for a three-way catalytic converter and related equipment, and belongs to the field of performance detection.The method comprises the steps that the rack aging time of a target three-way catalytic converter is estimated, and the estimated rack aging time is obtained; determining preset bench test environment information corresponding to the target three-way catalyst; determining a characterization test coefficient corresponding to the preset bench test environment information, wherein the characterization test coefficient characterizes an association relationship between the hydrothermal aging effect and the bench aging effect; according to the characterization test coefficient and the estimated rack aging time, the estimated hydrothermal aging time corresponding to the target three-way catalyst is determined; and based on the estimated hydrothermal aging time, carrying out a hydrothermal aging test on the target three-way catalyst so as to carry out durability evaluation on the target three-way catalyst. According to the method, only the hydrothermal aging test is needed in the evaluation process, rack aging or real vehicle aging test is not needed, the time consumption of the durability evaluation process is reduced, the cost is reduced, and the research and development efficiency is improved.

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.