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33results about How to "Ease of design optimization" patented technology
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Hot wall type heat exchanger
PendingCN107388861AImprove compactnessEase of design optimizationIndirect heat exchangersEngineeringLiquid phase
The invention discloses a hot wall type heat exchanger. Each hot wall of the hot wall type heat exchanger comprises an inner supporting device and a heat exchange partition wall wrapping the inner supporting device. Each inner supporting device comprises a middle section allowing phase change fluid to circulate up and down and upper and lower ends allowing the phase change fluid to circulate left and right. The hot walls are rectangular, and a plurality of hot walls of the uniform size are arranged in parallel to form a cluster, or the hot walls are annular, and a plurality of hot walls of varying sizes are nested layer by layer to form a cluster. A channel allowing fluid to pass through or a fin is arranged between every two adjacent hot walls. The fluid sides of the channels outside all the hot walls or the fluid sides of the fins outside all the hot walls are divided into a plurality of regions. Heat exchange of heat exchange fluid is realized through the phase change fluid in the hot walls. The hot wall type heat exchanger provided by the invention has higher compactness than that of existing heat pipes and can be suitable for more heat exchange fields. The hot wall type heat exchanger enables the circulation speed of the phase change fluid to be increased without resistance existing between gas phase fluid and liquid phase fluid or liquid phase resistance caused by tension of capillary pipes, and the heat exchange efficiency is improved.
Owner:HUNAN CHUANGHUA LOW CARBON ENVIRONMENTAL PROTECTION TECH
Isolated bidirectional charger control method and control circuit
InactiveCN108988451ARealize two-way operationImprove efficiencyBatteries circuit arrangementsSingle network parallel feeding arrangementsPower gridEngineering
The invention discloses a control method and a control circuit of an isolated bidirectional charger, belonging to the technical field of power electronic converters. The bi-directional charger controlcircuit adopted by the method comprises a bi-directional AC / DC converter, an isolated DC / DC converter and a control unit. The power grid is connected to the battery pack through bi-directional AC / DCconverter, isolated DC / DC converter, isolated DC / DC converter using LLC converter, control unit including sampling circuit, DSP and optocoupler isolated driving circuit. The control method realizes the high efficiency of bi-directional operation and forward and backward operation of the vehicle-mounted charger, and has the advantages of high power density, high reliability, few devices and high efficiency.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS WUXI RES INST
Calculation method of safety thickness of supporting layers of pile foundations of karst areas
ActiveCN104809312AEase of design optimizationEasy to operateSpecial data processing applicationsSocial benefitsEconomic benefits
The invention discloses a calculation method of safety thickness of supporting layers of pile foundations of karst areas. The calculation method comprises the following steps: step 1, establishing an assumed model, and simplifying the model; step 2, performing theoretical analysis on the safety thickness of the supporting layers; step 3, performing preliminary checking calculation on the safety thickness of the supporting layers; step 4, performing accurate checking calculation on the safety thickness of the supporting layers; step 5, judging whether the supporting layers satisfy calculation requirements. The calculation method disclosed by the invention is simple in calculation, facilitates design optimization of pile foundations, and is high in operability; in addition, through the adoption of the calculation method, the improvement of relevant norms is promoted, so that huge economic benefits and social benefits can be brought.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Parameter optimization method based on Pareto optimality under dual-mode configuration multi-target condition
ActiveCN112677957AReduce dimensionalityLighten the computational burdenHybrid vehiclesConfiguration optimizationNew energy
The invention relates to a parameter optimization method based on Pareto optimality under a dual-mode configuration multi-target condition, and belongs to the field of new energy vehicles. The method comprises the following steps: S1, constructing a steady-state kinetic equation under different configuration modes of a dual-mode configuration and a mode switching strategy based on transmission efficiency maximization; S2, establishing a hybrid power transmission system transient kinetic equation considering the rotational inertia of components; S3, based on a dynamic programming algorithm, constructing economic evaluation indexes including working condition related economic cost and transmission system part cost and a dynamic property evaluation index quantified by hundred kilometers of acceleration time; and S4, constructing a multi-objective optimization function through a Chebyshev aggregation method, and obtaining the economic cost related to the dual-mode configuration related working condition, the power transmission system part cost and the optimal Pareto leading edge of the dynamic property taking the acceleration performance as an evaluation index based on a multi-objective evolutionary algorithm MOEA / D. According to the method, a wider design space is provided for configuration optimization.
Owner:CHONGQING UNIV +1
Active disturbance rejection control method based on fractional order extended state observer and controller
ActiveCN109669356AImprove robustnessAvoid DifferentiationAdaptive controlProportional controlActive disturbance rejection control
The invention belongs to the technical field of controllers and particularly discloses an active disturbance rejection control method based on a fractional order extended state observer. The method comprises the following steps: S1, comparing an input reference signal with a system output signal to obtain a system error; S2, taking the system error as an input signal of a proportional controller to obtain a system control rate; S3, taking a controlled object as a purely fractional integral transfer function as shown in the description, taking a part except the transfer function as shown in thedescription in the controlled target as disturbance, and observing the disturbance through the fractional order extended state observer to obtain an observation value of the disturbance; and S4, estimating the disturbance to obtain gain estimation of the controlled object, carrying out real-time compensation on the disturbance according to the control rate and the observation value of the disturbance to obtain the stable controlled object. The fractional order active disturbance rejection control method has better robustness on a control parameter, also has good robustness on system gain change, and has better capability of resisting noise interference.
Owner:HUAZHONG UNIV OF SCI & TECH
AMS based asynchronous sequential circuit design method
InactiveCN105046014AEase of design optimizationRealize the designSpecial data processing applicationsComputer architectureCircuit design
The present invention belongs to the technical field of digital circuits, and in particular relates to an AMS based asynchronous sequential circuit design method. The method mainly comprises the steps of: determining the overall architecture of a designed asynchronous sequential circuit; dividing the overall architecture into two parts namely a control path and a data path according to characteristics of the asynchronous sequential circuit; finishing the design of the control path for replacing a global clock in a customized manner, and meanwhile finishing the design of the data path in a manner of establishing a virtual clock by adopting a conventional synchronous sequential circuit design flow; and performing simulation and verification on the control path and the data path by using an established AMS simulation platform, thereby obtaining a structure forming an integrated circuit. The AMS based asynchronous sequential circuit design method has the beneficial effects that based on a design idea of solution synchronization, and by performing effective division of the data path and the control path on an integrated system, the compatibility problem of the design of a synchronous sequential circuit is solved, the simulation time and difficulty are greatly reduced, and the method is more beneficial for realizing a VLSI design.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method for determining an oil-increasing effect of carbonate reservoir plugging agent deep profile control and flooding technology
ActiveCN110130860APromote the applicationEase of design optimizationFluid removalInjection wellPhysical model
Owner:CHINA OILFIELD SERVICES +1
Air conditioning system
ActiveCN107166819ASimple pipingSimplify piping designMechanical apparatusFluid circulation arrangementFour-way valveRefrigeration
The invention provides an air conditioning system capable of switching between refrigeration and heating. The air conditioning system comprises a reversing valve, a compressor, a first indoor unit, a second indoor unit and an outdoor unit. The reversing valve in the air conditioning system can conveniently enable six connecting pipes to switch between a 2-2-2 communicating mode and a 3-3 communicating mode; compared with a technical scheme of synchronously using two four-way valves in the prior art, the same effect can be achieved; but for the air conditioning system, after one reversing valve is used for replacing the two four-way valves, pipelines are simplified, the pipeline design is convenient, the space is released, the installation of the compressor can be guaranteed, the further design optimization is convenient, and the valve and pipeline costs are reduced; and in particular, the invention is suitable for an air conditioning system containing double air sucking compressors.
Owner:SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
Complex interface time sequence-based software system test verification method
ActiveCN107977312AEase of design optimizationReduce the risk of missing test coverageSoftware testing/debuggingSoftware systemSoftware engineering
The invention discloses a complex interface time sequence-based software system test verification method. The method comprises the following steps of: firstly carrying out interface attribute analysison a software system; generating a software system test verification case according to the interface attribute analysis result; carrying out feedback, iteration and optimization on the software system test verification case; and finally carrying out interface time sequence test verification by using the obtained software system test verification case. The complex interface time sequence-based software system test verification method is constructed by combining development engineering practice of spacecraft systems; and being compared with the prior art, the method is capable of effectively shortening the complex interface time sequence test period, reducing the test cost and improving the coverage and robustness of complex interface time sequence test, and has an important engineering practical meaning.
Owner:BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1
Manufacturing method of SiC power device chip gate oxide layer and power device
ActiveCN111009464AGuaranteed normal consumptionReduce manufacturing costSemiconductor/solid-state device manufacturingSemiconductor devicesPhysical chemistryEngineering
The invention discloses a manufacturing method of a SiC power device chip gate oxide layer and a power device. According to the manufacturing method of the gate oxide layer of the SiC power device chip, the number of introduced elements can be accurately controlled through multiple times of injection, a defect elimination effect is guaranteed, and gate reliability reduction caused by introductionof excessive P / B elements is avoided. And element distribution is optimized through multiple times of injection so that a P injection layer is completely consumed in a thermal oxidation process. An injection region is defined through photoetching before thermal oxidation, a P / B injection region is formed on a surface of an SIC, P and N elements jointly form an interface trap, an interface state isreduced, two elements are introduced without NO atmosphere annealing, the interface state is compositely reduced, the reliability of a gate is improved, and manufacturing cost of the device is reduced.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Broadband frequency selector
ActiveCN103219568BReduce sensitivityGuaranteed stabilityWaveguide type devicesUnit sizeParabolic antenna
The invention discloses a broadband frequency selector and mainly solves the problems in the prior art that the unit size is large and the performance is poor during the large-angle incidence of an electromagnetic wave. The broadband frequency selector comprises a metal layer (1) and a medium layer (2), wherein the metal layer is positioned on the medium layer and consists of N hexagonal units (11) which are periodically arranged according to a triangular grid; N is more than or equal to 3; each unit comprises a regular hexagon metal patch (111) and a regular hexagon metal wire frame (112) at the periphery of the regular hexagon metal patch (111) and a regular hexagon gap (113) is arranged between the metal patch and the corresponding metal wire frame; an H-shaped gap (114) is vertically etched in the center of each edge of each regular hexagon gap; the H-shaped gaps are of the same size; and each H-shaped gap comprises two vertical seams of the same size and a horizontal gap which is sandwiched between the two vertical seams. The broadband frequency selector can maintain the stability of a central frequency point and high frequency selection characteristic during the incidence of the electromagnetic wave at an angle of 0 to 70 DEG, has the advantages of broad working frequency band, low loss, simple structure and easiness in implementation, and can be applied to radar domes and parabolic antennae.
Owner:XIDIAN UNIV
Double-frequency-point ultrahigh-frequency broadband tag antenna
PendingCN112909526ASmall sizeLarge reactance componentSimultaneous aerial operationsAntenna supports/mountingsTag antennaDielectric substrate
The invention discloses a double-frequency-point ultrahigh-frequency broadband tag antenna, which comprises a dielectric substrate, a resonant structure, an impedance matching structure and a metal bonding pad, and is characterized in that the resonant structure comprises a first resonant unit and a second resonant unit; the first resonance unit comprises a first rectangular metal microstrip line, a second rectangular metal microstrip line, a third rectangular metal microstrip line, a fourth rectangular metal microstrip line and a fifth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate; the second resonance unit comprises a sixth rectangular metal microstrip line, a seventh rectangular metal microstrip line and an eighth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate, and the impedance matching structure is located on the front side of the second rectangular metal microstrip line and located on the right side of the second resonance unit. The impedance matching structure comprises a ninth rectangular metal microstrip line, a tenth rectangular metal microstrip line, an eleventh rectangular metal microstrip line and a twelfth rectangular metal microstrip line which are attached to the upper surface of the dielectric substrate; and the antenna has the advantage of wide working frequency range coverage.
Owner:NINGBO UNIV
Active and passive wave compensation experiment device
PendingCN108877372AIncrease load capacityEase of design optimizationCosmonautic condition simulationsSimulatorsHydraulic cylinderPrediction algorithms
The invention discloses an active and passive wave compensation experiment device. The device comprises a wave simulation platform, a load suspending system installed on the wave simulation platform,and an active and passive wave compensation system connected with the load suspending system. The wave simulation platform comprises a fixed pedestal, and a platform is disposed above the fixed pedestal. The fixed pedestal is connected with the platform through a six-freedom-degree simulation hydraulic cylinder. The device employs the six-freedom-degree wave attitude simulation equipment as the wave simulation platform, can achieve the prediction of the motion trend of the platform in the future takt time, and takes the corresponding compensation measures. The active and passive wave compensation experiment device can provide a real experiment environment for the research and debugging of a wave compensation prediction algorithm. The experiment device employs a variable pump as the drivingforce, and improves the loading capability.
Owner:SHANDONG UNIV
Micro electro mechanical system design optimization method based on integrated model assisted social learning particle swarm algorithm
ActiveCN112528556AReduce riskQuality improvementArtificial lifeDesign optimisation/simulationMicro electrical mechanical systemsEngineering
The invention discloses a micro electro mechanical system design optimization method based on an integrated model assisted social learning particle swarm algorithm, which comprises the steps of initializing a population according to a control range of a design variable of an MEMS; selecting a proper amount of samples from the candidate set as a training set according to a selection rule to train an integration model; then, solving the population by using a social learning particle swarm optimization algorithm, and giving a fitness prediction value of each individual by an integrated model; finally, using an SMIC point adding criterion for managing the model, wherein a proper individual is selected for real fitness evaluation. In each iteration, the optimal position is searched from the candidate set cache, and when the iteration is ended, the finally stored position of the optimal individual is used as the optimal variable combination in the MEMS design. Not only can a high-quality design solution be obtained, but also the risk caused by an agent model with poor fitting can be reduced, and the method is suitable for optimization of different types of MEMS.
Owner:GUANGDONG UNIV OF TECH
Simulation test method of air leakage of piston and simulation test device thereof
InactiveCN104406749AShorten the development cycleImprove development efficiencyMeasurement of fluid loss/gain ratePistonEngineering
The invention discloses a simulation test method of the air leakage of a piston. The simulation test method disclosed by the invention comprises the following steps of: increasing pressure of hydraulic oil; changing the frequency of the hydraulic oil; introducing the hydraulic oil in a cylinder sleeve (1), in which the piston (2) is put, so that the piston (2) moves along the axis of the cylinder sleeve (1); putting the hydraulic oil in the cavity of the piston (2); and the hydraulic oil flowing out from the cavity of the piston (2), and measuring the flow of the hydraulic oil by using a flowmeter (3). By means of the simulation test method of the air leakage of the piston, the problems of being long in period, low in efficiency and the like in the process of testing the air leakage of the piston are effectively solved. The invention further discloses a simulation test device of the air leakage of the piston. The simulation test device disclosed by the invention is lower in cost and higher in efficiency and is beneficial to design optimization of the piston.
Owner:湖南江滨机器(集团)有限责任公司
An Analysis of Alloy Semi-solid Rheomorphism and Numerical Simulation Method of Rheomorphology
ActiveCN113011056BFew parametersRelatively small errorDesign optimisation/simulationSpecial data processing applicationsMathematical modelShear rate
Owner:UNIV OF SCI & TECH BEIJING
Calculation Method of Safe Thickness of Bearing Layer of Pile Foundation in Karst Area
ActiveCN104809312BEase of design optimizationEasy to operateSpecial data processing applicationsSocial benefitsKarst
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
A parameter optimization method based on Pareto optimality under the condition of dual-model configuration and multi-objective
ActiveCN112677957BReduce dimensionalityLighten the computational burdenHybrid vehiclesConfiguration optimizationNew energy
Owner:CHONGQING UNIV +1
a reversing valve
ActiveCN107166059BSimple designGuaranteed installation effectMultiple way valvesFluid circulation arrangementFour-way valveEngineering
The invention provides a reversing valve, comprising: a body, a first connecting pipe to a sixth connecting pipe, a first slider and a second slider, a first partition and a second partition, and a control member. The reversing valve of the present invention can conveniently switch the six connecting pipes between the 2, 2, 2 communication mode and the 3, 3 communication mode. Compared with the scheme of using two four-way valves in the prior art, it can To achieve the same effect, but for the air conditioning system, after using one reversing valve instead of two four-way valves, the pipeline is simplified, which is convenient for pipeline design, frees up space, ensures the installability of the compressor, and facilitates further design optimization. Reduce valve and piping costs, especially in air conditioning systems including double suction compressors.
Owner:SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
Test device for developing equipment
PendingCN109581000AImprove referenceabilityEase of design optimizationMeasurement instrument housingTest requirementsEngineering
The invention discloses a test device for developing equipment. The test device comprises a main frame and a support plate assembly, two opposite sides of the main frame are respectively provided witha side plate, at least one adjusting hole group is arranged between the main frame and the side plates, the side plates can move relative to the main frame through the adjusting hole group to adjustthe distance between the side plates, the support plate assembly is arranged on the main frame, and the support plate assembly is located between the side plates at two sides of the main frame. According to the technical scheme, the distance between the side plates can be adjusted through the adjusting hole group according to different distance test requirements, the function of adjustable distance of the test device can be realized, the reference of the test data is high, and design optimization and structural adjustment for the product are facilitated.
Owner:GUANGDONG MINGYANG ELECTRIC CO LTD
Construction Method of Mechanism Model of Prestressed Anchor Cable Force Transmission when Anchor Section Crosses Double Strata
ActiveCN112989572BClear conceptSimple modelFoundation testingDesign optimisation/simulationCable transmissionPull force
Owner:ZHEJIANG UNIV
Active Disturbance Rejection Control Method and Controller Based on Fractional Extended State Observer
ActiveCN109669356BImprove robustnessInhibition of differentiationAdaptive controlProportional controlControl engineering
The invention belongs to the technical field of controllers and particularly discloses an active disturbance rejection control method based on a fractional order extended state observer. The method comprises the following steps: S1, comparing an input reference signal with a system output signal to obtain a system error; S2, taking the system error as an input signal of a proportional controller to obtain a system control rate; S3, taking a controlled object as a purely fractional integral transfer function as shown in the description, taking a part except the transfer function as shown in thedescription in the controlled target as disturbance, and observing the disturbance through the fractional order extended state observer to obtain an observation value of the disturbance; and S4, estimating the disturbance to obtain gain estimation of the controlled object, carrying out real-time compensation on the disturbance according to the control rate and the observation value of the disturbance to obtain the stable controlled object. The fractional order active disturbance rejection control method has better robustness on a control parameter, also has good robustness on system gain change, and has better capability of resisting noise interference.
Owner:HUAZHONG UNIV OF SCI & TECH
Oil sprayer fixing tool
The invention discloses an oil sprayer fixing tool. The oil sprayer fixing tool is applied to optical engine research and comprises a main pipe, a mounting pipe and an angle adjusting assembly; an opening is formed in the outer side wall of the main pipe in a run-through way; the main pipe is used for fuel oil to circulate; the mounting pipe is provided with a connecting end and a mounting end which are arranged oppositely; the connecting end is hermetically arranged at the opening and communicates with the main pipe; the mounting end is used for mounting an oil sprayer; the mounting pipe is used for guiding the fuel oil in the main pipe into the oil sprayer and spraying out the fuel oil through the oil sprayer; the axis of the mounting end and the axis of the main pipe are intersected andform an adjusting plane; and the angle adjusting assembly is arranged between the main pipe and the mounting end and is used for adjusting the angle between the mounting end and the main pipe in theadjusting plane. Thereby, the angle of the oil sprayer relative to the main pipe is adjustable in the test process, the fuel form in a cylinder at different mounting angles is convenient to observe and design optimization is benefited.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Horizontal-axis wind generating set with foldable wind wheels and using method
ActiveCN113090448AReduced sweep areaReduce loadWind motor controlFinal product manufactureNacelleElectric energy
The invention provides a horizontal-axis wind generating set with foldable wind wheels and a using method. The horizontal-axis wind generating set with the foldable wind wheels comprises an inner and outer double wind wheel and an annular cabin, wherein the inner and outer double wind wheel comprises an outer wind wheel and an inner wind wheel, and the outer wind wheel is mounted on the outer side of the annular cabin and is arranged in the manner of a foldable structure; the inner wind wheel is mounted on the inner side of the annular cabin; the annular cabin comprises a mechanical transmission system and a direct-driven generator, and the direct-driven generator is provided with rotors, and the axes are arranged in the vertical direction; and the inner and outer double wind wheel is in kinematic mechanical connection with the direct-driven generator, and wind energy is converted into electric energy. When the horizontal-axis wind generating set with the foldable wind wheels encounters extreme disastrous weather conditions, the outer wind wheel is folded, the wind wheel swept area is reduced, and safety of the wind generating set is protected. According to research and development of the device, the structural characteristics of the horizontal-axis wind generating set are fully utilized, components and the connection form are systematically optimized, the manufacturing and mounting cost is controlled, and meanwhile the capability of the horizontal-axis wind generating set for coping with disastrous weather conditions is effectively improved.
Owner:HUANENG CLEAN ENERGY RES INST
Measuring instrument
ActiveCN112033653AEase of design optimizationEasy to useMachine part testingMeasuring instrumentEngineering
The invention discloses a measuring instrument, and relates to the field of measuring equipment. The measuring instrument comprises a machine frame; a first sliding part which is movably arranged on the machine frame, and can move in a first direction; a second sliding part which is movably arranged on the first sliding part and can move in a second direction, wherein the second direction is perpendicular to the first direction; a holding part which is movably arranged on the second sliding part, and can move in a third direction, wherein the third direction is perpendicular to the first direction and the second direction, the holding part is provided with a to-be-tested product interface, and the to-be-tested product interface is connected with an operating component of a to-be-tested product; a force sensor which is arranged at the interface of the to-be-tested product; and at least three speed measuring assemblies which are suitable for measuring the speed of the first sliding part,the speed of the second sliding part and the speed of the holding part respectively. The purpose of the present invention is to provide a measuring instrument capable of measuring a parameter of a force of a user using a consumer-grade product.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Measuring instrument
ActiveCN112033653BEase of design optimizationEasy to useMachine part testingMeasuring instrumentMechanical engineering
The invention discloses a measuring instrument, which relates to the field of measuring equipment. The measuring instrument comprises: a frame; a first sliding part, which is movably arranged on the frame, and the first sliding part can move along a first direction; The second sliding part, the second sliding part is movably arranged on the first sliding part, and the second sliding part can move along the second direction, and the second direction is perpendicular to the first direction; the grip part, the grip part can move is arranged on the second sliding part, the holding part can move along the third direction, the third direction is perpendicular to the first direction and the second direction, and the holding part has an interface of the product to be tested, and the interface of the product to be tested is connected to the The operating parts of the product are connected; the force sensor is arranged on the interface of the product to be tested; and at least three speed measurement components are adapted to measure the speed of the first sliding part, the second sliding part and the gripping part respectively. The present invention aims to provide a measuring instrument that can measure the parameters of the force of the user using a consumer grade product.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
an air conditioning system
ActiveCN107166819BFacilitated releaseGuaranteed installation effectMechanical apparatusFluid circulation arrangementFour-way valveControl engineering
Owner:SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
A design method of asynchronous sequential circuit based on ams
InactiveCN105046014BEase of design optimizationRealize the designSpecial data processing applicationsComputer architectureAlternative control
The invention belongs to the technical field of digital circuits, and in particular relates to an AMS-based asynchronous sequential circuit design method. The method of the present invention mainly includes determining the overall structure of the designed asynchronous sequential circuit; dividing it into two parts, the control path and the data path according to the characteristics of the asynchronous sequential circuit; In the traditional synchronous sequential circuit design process, the data path design is completed by establishing a virtual clock; using the built AMS simulation platform, the control path and data path are simulated and verified, and the structure of the overall circuit is obtained. The beneficial effect of the present invention is that, based on the design idea of desynchronization, the present invention solves the problem of compatibility with synchronous sequential circuit design by effectively dividing the data path and the control path of the overall system, greatly reducing the simulation time and difficulty, It is more conducive to the realization of VLSI design.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Analysis and rheoforming numerical simulation method for alloy semi-solid rheoforming
ActiveCN113011056AFew parametersRelatively small errorDesign optimisation/simulationSpecial data processing applicationsMathematical modelMold filling
The invention discloses an analysis and rheoforming numerical simulation method for alloy semi-solid rheoforming, the model is simple and accurate, has few parameters, can accurately reflect the relationship among temperature (solid fraction), shear rate and viscosity when the solid fraction of metal semi-solid slurry is less than 70%, and can accurately reflect The dynamic change condition of the viscosity in the non-Newtonian fluid flow shearing process. The viscosity model is coupled with a fluid mechanics and flow basic equation, a metal rheoforming process mathematical model is established, the mathematical model can be used for metal semi-solid rheoforming numerical simulation, semi-solid slurry flow characteristics, mold filling and solidification rules and defect prediction in the rheoforming process can be accurately obtained, in addition, optimization of the forming process and mold design is facilitated, and a good guiding effect is achieved on accurate control over the whole process of preparation, conveying and rheological forming of the semi-solid slurry.
Owner:UNIV OF SCI & TECH BEIJING
Drilling fluidic element detection device
The invention provides a drilling fluidic element detection device comprising a flow meter joint, an upper gland, an outer pipe, an outer pipe joint, a pump, a data collector, and a computer. The outer pipe is internally equipped with a fluidic element, a hydraulic cylinder, a cylinder head and a locating spacer sleeve which are installed from top to bottom. The output pipeline of the pump is connected with the inlet end of the flow meter joint. After the flow meter joint, the upper gland, the outer pipe and the outer pipe joint are connected in sequence, and the outer pipe joint is connected with the reflux pipeline of the pump. According to the device, a working fluid medium is transmitted through the pump to drive the fluidic element inside the outer pipe to work, a flow meter and a pressure sensor detect the change in the parameters of liquid inside the fluidic element in a working state, and the data collector and the computer collect and store flow and pressure data for analyzing, optimizing and improving the working parameters of the fluidic element. The detection device is relatively simple in structure and convenient to assemble and disassemble, and is conductive to replacement and installation of fluidic elements of different parameters in the test process.
Owner:CNPC BOHAI DRILLING ENG
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