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Automobile expected working condition noise analog simulation method and system based on reference noise matching
ActiveCN119249916Aincrease development costsAccelerate development cycleSustainable transportationDesign optimisation/simulationFeature extractionSimulation
The invention provides an automobile expected working condition noise simulation method and system based on reference noise matching, and relates to the technical field of noise simulation. The method provided by the invention comprises the steps of performing feature extraction on reference noise data to obtain reference noise features of each reference vehicle type under each original working condition; inputting the sound field influence factors of the vehicle type to be detected into a pre-trained target model to obtain predicted noise features output by the target model; comparing the predicted noise feature with each reference noise feature to obtain a target reference vehicle model matched with the to-be-detected vehicle model; and in a noise playback cavity matched with the to-be-tested vehicle model, playing back reference noise data of the target reference vehicle model under the expected working condition. According to the method, a main engine plant can simulate and evaluate noise characteristics in an early stage, so that design changes caused by noise problems are reduced.
Owner:CHINA AUTOMOTIVE TECH & RES CENT CO LTD +1
Method and system for dynamically adjusting and optimizing variable-pitch PID (Proportion Integration Differentiation) gain of wind turbine generator
ActiveCN119412280Aincrease development costsreasonable settingWind motor controlMachines/enginesProportion integration differentiationControl engineering
The invention discloses a wind turbine generator variable pitch PID gain dynamic adjustment optimization method and system. The method comprises the following steps that S1, a rotating speed-torque curve is determined; s2, variable-pitch PID gain setting is carried out under the limited rotating speed and the variable air density; s3, variable-pitch PID gain scheduling of the limited rotating speed is carried out; s4, variable-pitch PID gain scheduling of the variable air density is carried out; s5, performing variable pitch PID gain scheduling under variable turbulence; compared with an existing variable-pitch PID control method, the variable-pitch PID control method has the advantages that additional control means do not need to be added, the technical maturity is high, the needed hardware cost is low, robustness is good, the real-time performance is excellent, the influence of the limited rotating speed, air density and turbulence on variable-pitch PID gains is comprehensively considered, and the method is suitable for large-scale popularization and application. Therefore, the problems of overspeed rotating speed and power fluctuation of the generator caused by changes of the rotating speed and the air density under the condition of large turbulence are effectively reduced.
Owner:GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
Integrated production and manufacturing method and device for die castings
The invention discloses a die casting integrated production and manufacturing method and device. The method comprises the steps that a die casting is divided into a plurality of areas according to a preset rule, each area is independently produced through low-pressure casting equipment, the multiple low-pressure casting equipment synchronously operates for production, and a middleware is formed at a time; and defects on the middleware are trimmed through a material reducing machining method, and the die casting is obtained. The device comprises a plurality of low-pressure casting devices corresponding to a plurality of areas divided by a die casting according to a preset rule, and a liquid supply pipe, wherein a plurality of branch pipes connected with the low-pressure casting devices are arranged on the liquid supply pipe; each low-pressure casting device comprises a lower die assembly and an upper die assembly which are oppositely arranged, and the problems that an ultra-large die casting machine is high in manufacturing cost, long in manufacturing period, high in maintenance cost, long in maintenance time and high in production efficiency can be solved. The problems that an integrated die-casting process is blocked, die cost is high, die maintenance is difficult, die maintenance cost is high, die service life is short, heat-treatment-free aluminum alloy materials do not exist, and the yield is low are solved.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
Hub system limit load control method and system under single-blade stall condition
ActiveCN116928017Bincrease development costsImprove design requirementsWind motor controlMachines/enginesControl engineeringControl theory
The application discloses a kind of single-blade card paddle working condition under wheel hub system limit load control method and system, this method is when wind turbine generator set normal operation detects whether blade is in card paddle state, when detecting card paddle failure, shutdown action is carried out, wind turbine generator set first enters load dynamic balance control mode, then calculates the current yaw error in shutdown process, yaw control is carried out to wind turbine generator set based on yaw error, so that wind turbine generator set is far away from directly facing wind direction, reduce the wind load of wind turbine generator set, and then reduce generator speed, when the load of wheel hub system of wind turbine generator set is less than preset threshold, wind turbine generator set carries out unified variable pitch rate feathering control, so that the load of wheel hub system meets design requirement, improve the safety of unit, and then reduce the design cost of wheel hub system.
Owner:GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
Multi-channel pulse frequency modulation signal acquisition card and device
ActiveCN222441836Uincrease development costsReduce difficulty of useMouthpiece/microphone attachmentsTransducer circuitsData acquisitionUSB
The utility model provides a multichannel pulse frequency modulation signal acquisition card and equipment, and relates to the technical field of audio signal acquisition and processing. The signal acquisition card comprises a circuit substrate, and a plurality of 50-path FPC (Flexible Printed Circuit) interfaces, an FPGA (Field Programmable Gate Array) device, a USB (Universal Serial Bus) control chip and a power supply module which are arranged on the circuit substrate. Wherein the plurality of 50-path FPC interfaces are used for connecting and driving the multi-path digital microphone; the FPGA device is used for receiving a PDM signal output by the multi-channel digital microphone and converting the PDM signal into a PCM signal; and the USB control chip is used for transmitting the PCM signal to computer equipment. The signal acquisition card can acquire PDM signals of a multi-channel digital microphone and convert the PDM signals into PCM signals. The FPGA device can provide a conversion parameter configuration function, the application scene is wide, and the function is more powerful. The convenience of data acquisition and processing of the digital microphone can be effectively improved, so that the acquisition requirement of a user is met.
Owner:PIPECHINA SOUTH CHINA CO
Motorcycle protection plate forming die
ActiveCN222451201USimple structureReduce development costsStructural engineeringMechanical engineering
Owner:NINGBO ZHONGCHENG MOLDING CO LTD
Laser radar heating cover plate analysis method based on CAE joint simulation technology
ActiveCN115640640BImprove simulation accuracyImprove R&D effectivenessGeometric CADDesign optimisation/simulationStructure analysisHeat analysis
The application relates to a laser radar heating cover plate analysis method based on CAE joint simulation technology, which comprises the following steps: creating a first laser radar heating cover plate model for fluid analysis based on three-dimensional data of the laser radar heating cover plate; defining various parameters of the first laser radar heating cover plate model and performing simulation calculation to conduct thermal analysis and wind pressure analysis on the laser radar heating cover plate; creating a second laser radar cover heating cover plate model for structure analysis based on three-dimensional data of the laser radar heating cover plate; mapping simulation results of the first laser radar heating cover plate model to the second laser radar cover heating cover plate model to obtain temperature data and surface pressure data of various nodes on the mapped second laser radar cover heating cover plate model; and performing simulation calculation on the second laser radar cover heating cover plate model according to the mapped temperature data and surface pressure data to obtain a deformation amount of the laser radar cover heating cover plate. The application can guide heating wire selection, layout and structure design.
Owner:NINGBO XINTAI MACHINERY
A CAE-based light grid mist simulation method
ActiveCN115525971BAccurate and easy to defineReduce modeling difficultyGeometric CADDesign optimisation/simulationElectronic componentMesh grid
The application relates to a CAE-based light-emitting grid mist simulation method, which comprises the following steps: constructing a light-emitting grid product model based on three-dimensional data of the light-emitting grid and defining an analysis model; defining material parameters of parts of the light-emitting grid product model; defining outer wall surface simulation parameters of the light-emitting grid product model; defining the heat power of electronic components of the light-emitting grid product model; completing local mesh encryption of each part of the light-emitting grid product model; defining the inner surface of a mask of the light-emitting grid product model as a monitoring target, and defining a physical quantity as film thickness; setting solving parameters and performing calculation to obtain the film thickness of the inner surface of the mask of the light-emitting grid product model. The application can guide the internal structure design of the light-emitting grid and the layout of air holes on the shell.
Owner:NINGBO XINTAI MACHINERY
Order aggregation processing method, device and system and electronic equipment
PendingCN119599653AReduce the difficulty of dockingImprove docking efficiencyFinancePayment architecturePaymentE-commerce
The embodiment of the invention discloses an order aggregation processing method, device and system and electronic equipment. A specific embodiment of the method comprises the steps of determining whether order information matched with a value transfer request exists in response to the received value transfer request sent by a business system; in response to determining that the matched order information does not exist, writing the order information into a machine account system, and generating a receivable machine account record of the order information; determining a value receiving system for processing the value transfer request according to a value transfer mode of the value transfer request; and processing the value transfer request according to the processing flow of the value receiving system to complete value transfer. The implementation mode is related to e-commerce and payment technologies, different payment modes can be aggregated into one payment process, docking with each payment cashier system is realized, and thus the docking complexity is reduced. And moreover, automatic writing of financial related accounting data can be realized, and financial management and control requirements are met.
Owner:BEIJING JINGDONG TUOXIAN TECH CO LTD
A processing system based on financial data
The present application provides a processing system based on financial data, the system involves a management end, a business end and a data end, wherein the management end includes a first generation module, a first sending module, a second sending module, a third sending module and a server for storing data files; the first generation module is used for the management end to obtain data files in the server according to a preset timed task, and generate structured data according to the data files; the first sending module is used for the management end to generate a write request according to the structured data; the second sending module is used for the management end to filter out qualified data from the structured data according to the historical information; the third sending module is used for the management end to generate a first email message according to the difference data in the summary data when there is difference data in the summary data. Reduce the cost of development and maintenance and shorten the online cycle.
Owner:国任财产保险股份有限公司
Battery management system parameter backup synchronization method, system and storage medium
ActiveCN117194098Bincrease development costs
The application provides a vehicle battery management system parameter backup synchronization method, system and storage medium. The method comprises the following steps: an external diagnosis device sends a parameter backup instruction to an original battery management controller, the instruction comprising a backup instruction identifier and a cloud storage unit identifier; the original battery management controller sends a vehicle identifier, the cloud storage unit identifier and vehicle battery management system parameters to the cloud storage unit via an over-the-air technology module; after replacement with a new battery management controller, the external diagnosis device sends a parameter synchronization instruction to the new battery management controller; the new battery management controller sends a parameter acquisition instruction to the over-the-air technology module; and the over-the-air technology module acquires the vehicle battery management system parameters from the cloud storage unit and sends them to the new battery management controller for storage. The application solves the problems of parameter loss and failure to synchronize after replacement of the battery management controller.
Owner:FAW VOLKSWAGEN AUTOMOTIVE CO LTD
Planar transformer structure of integrated control chip
PendingCN119673632Areduce volumeImprove power densityTransformers/inductances coils/windings/connectionsTransformers/inductances magnetic coresMechanical engineeringPrinted circuit board
The invention relates to the technical field of planar transformers, solves the technical problems that a traditional power module is low in integration level and reuse rate, long in development and design period, high in cost and low in yield, and particularly relates to a planar transformer structure of an integrated control chip. Comprising a planar transformer PCB (printed circuit board), a transformer magnetic core and a patch area reserved outside the planar transformer magnetic core on the planar transformer PCB, a control chip is integrated on the patch area, and the planar transformer PCB and the transformer magnetic core are selectively combined on a power supply bottom plate module to form a power supply module structure. In addition, the crystal nucleus of the control chip can be arranged in the PCB corresponding to the patch area. The power density of the power supply module can be improved, the complexity of production and processing of the power supply module is reduced, design replacement of a chip according to an application scene of the power supply module is facilitated, and the relatively independent processing technology can improve the yield of products and shorten the design time.
Owner:HEFEI XIANHU SEMICON TECH CO LTD
A method for measuring the spatial distribution of the plate separation of a fabry-perot filter based on solar observation
ActiveCN120684995BIncrease the difficulty of installation and adjustmenthigh riskUsing optical meansParallel plateObservation data
This invention discloses a method for measuring the spatial distribution of the Fabry-Perot filter plate spacing based on solar observation, relating to the field of optical technology. The method includes the following steps: constructing an observation optical path so that sunlight, after passing through a lens group to form a telecentric beam, is perpendicularly incident on a Fabry-Perot filter composed of two parallel plates. The beam is then converged to a detector via an imaging mirror. The detector is used to acquire a two-dimensional spatial image of the sun, and the detector pixels correspond one-to-one with the plate areas of the filter. This invention directly utilizes the solar observation optical path during the measurement process, eliminating the need for additional dedicated measurement optical paths and equipment, significantly reducing system complexity, minimizing the risk of errors during equipment installation and debugging, and effectively controlling development costs. The spatial distribution of the plate spacing can be measured synchronously during normal solar observation without interrupting the observation process, enabling real-time monitoring of the Fabry-Perot filter's status and ensuring the continuity and integrity of the observation data.
Owner:YUNNAN OBSERVATORY CHINESE ACADEMY OF SCIENCES
Application of cisplatin combined with CHI3L1 neutralizing antibody in preparation of medicine for treating ovarian cancer
PendingCN119607210Agood treatment effectlittle side effectsInorganic active ingredientsAntibody ingredientsAntiendomysial antibodiesConventional chemotherapy
The invention provides a combined drug combination of a CHI3L1 neutralizing antibody and cis-platinum for treating cancers, especially ovarian cancer and / or ovarian cancer ascites. Belongs to the field of biomedicine application. The CHI3L1 neutralizing antibody not only has high affinity, but also can inhibit invasion and metastasis of tumor cells, more accurately attack the tumor cells, reduce damage to normal cells and help patients who are not sensitive to chemotherapy regimens any more or have poor treatment effects. The CHI3L1 neutralizing antibodies of the present invention provide a more effective, safer and economical treatment option for patients with ovarian cancer and / or ovarian cancer ascites, particularly those having limited response to conventional chemotherapy methods. In addition, the development of the combined strategy may inspire more similar researches and promote the further development of the cancer treatment field.
Owner:CHIMEDICAL UNIVERSITY
Lower vehicle body structure of electric vehicle
PendingCN119636924Areduce in quantityReduce development investmentElectric propulsion mountingSuperstructure subunitsElectrical batteryElectric vehicle
The invention discloses a lower automobile body structure of an electric automobile. The lower automobile body structure comprises an automobile body lower assembly composed of a front cabin assembly, a battery pack assembly and a rear floor assembly. The front cabin assembly comprises a front longitudinal beam wheel cover assembly, and a front baffle lower cross beam is arranged on the front longitudinal beam wheel cover assembly. A battery pack front cross beam, a battery pack side edge beam and a battery pack rear cross beam are arranged on the side wall of the battery pack assembly; the rear floor assembly comprises a rear longitudinal beam wheel cover assembly; a rear floor front cross beam is arranged on the rear longitudinal beam wheel cover assembly; the front baffle lower cross beam is fixed with the battery pack front cross beam through a bolt, and the bolt is fixed with the battery pack rear cross beam through the rear floor front cross beam; the integration is high, the two independent units of the lower vehicle body and the battery pack are combined into a whole, and the number of parts and the weight of the vehicle body are reduced; a front floor assembly is omitted, the vehicle body tool development investment is reduced, and the whole vehicle development cost is reduced.
Owner:CHERY NEW ENERGY AUTOMOBILE TECH CO LTD
Titanium alloy isothermal thermal forming process based on analogue simulation
ActiveCN119634543Agood precisionimprove consistencyShaping toolsDesign optimisation/simulationTitanium alloyDeep drawing
The invention provides a titanium alloy isothermal thermal forming process based on analogue simulation. The titanium alloy isothermal thermal forming process comprises the steps that S1, a material performance database capable of being recognized by Autoform software is established according to input variables and output variables of a material performance test; s2, determining an isothermal hot forming process route according to the characteristics of the titanium alloy part, wherein the isothermal hot forming process route comprises an isothermal hot deep drawing process and an isothermal hot sizing process; s3, theoretical analysis is conducted according to the material performance database and the isothermal thermal forming process route, and thermal forming parameters needing to be simulated in the isothermal thermal deep drawing procedure and the isothermal thermal sizing procedure are determined; s4, performing analogue simulation of an isothermal hot deep drawing process and an isothermal hot sizing process on the titanium alloy plate by using Autoform software; and S5, trial-manufacturing of the part is conducted according to the forming parameters obtained through analogue simulation, and the forming parameters of the isothermal hot deep drawing procedure and the isothermal hot sizing procedure of the part are adjusted according to the forming quality of the trial-manufactured part so that the part can meet the technical requirements of the part.
Owner:TIANJIN WUYUE AVIATION TECH CO LTD +2
Data permission management method, gateway, back end and related equipment
PendingCN119475314Aefficient managementSimplify Logic DesignDatabase management systemsProgramming languages/paradigmsData accessEngineering
The invention discloses a data permission management method, a gateway, a back end and related equipment, and belongs to the technical field of servers, and the method comprises the steps: when a target request of a front end is received, determining a data permission identifier corresponding to the target request, and obtaining a target permission identifier; wherein different data permission identifiers correspond to data access permissions requested by different users; adding the target permission identifier to a request header of the target request; and sending the target request to the back end, so that the back end feeds back the target data to the front end according to the target permission identifier in the request header. According to the method, relatively high development cost and maintenance cost are not needed, and when the back end responds to the target request, the role information corresponding to the target request does not need to be searched from the gateway, and the target request can be directly responded according to the data permission identifier in the target request header, so that the user experience is improved. Therefore, the data processing performance of the rear end can be obviously improved.
Owner:NANJING DERI ENERGY RES INST CO LTD
Methods, devices, and readable storage media for evaluating the squealing of timing chain drive systems
ActiveCN113468761Bincrease development costsReduce development costsDesign optimisation/simulationSimulationChain link
The present invention discloses a method for evaluating the howling of a timing chain transmission system, comprising the following steps: obtaining the design parameters of the timing chain transmission system; generating a simulation analysis model of the timing chain transmission system according to the design parameters; obtaining the tight-side chain order force of the timing chain transmission system under at least one working condition based on the simulation analysis model, wherein the tight-side chain order force is a tight-side chain tension of different orders; and determining the howling evaluation level of the timing chain transmission system under the working condition according to the tight-side chain order force. The present invention also discloses a howling evaluation device and a readable storage medium for a timing chain transmission system. By evaluating the howling evaluation level of the timing chain transmission system in advance through a simulation analysis model, the timeliness of the howling evaluation level evaluation can be improved, thereby saving the development cost of the engine.
Owner:ZHEJIANG YILI AUTO PARTS CO LTD +1