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126 results about "Static simulation" patented technology
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Static simulation models are based on current exposures and assume a constant balance sheet with no new growth. In contrast, dynamic simulation models rely on detailed assumptions regarding changes in existing business lines, new business, and changes in management and customer behavior.
Automatic driving vehicle test simulation scene generation method
PendingCN110263381AQuick buildAvoid wastingSoftware testing/debuggingDesign optimisation/simulationIn vehicleRoad networks
The invention discloses an automatic driving vehicle test simulation scene generation method, and belongs to the field of vehicle testing. Real road network information in a certain area is extracted based on a high-precision map, supplementary definition parameters of related roads and environments are generated based on a Monte Carlo method, and the supplementary definition parameters and the real road network information jointly form an automatic driving vehicle test static simulation scene. An initial state of a plurality of manual driving vehicles is generated based on a Monte Carlo method, and each manual driving vehicle is endowed with a driver module, so that the manual driving vehicle has basic logic judgment capability and driving behavior capability in vehicle driving, and an automatic driving vehicle test dynamic simulation scene is perfected. According to the automatic driving vehicle test simulation scene generation method developed by the invention, factors such as road conditions, traffic conditions, road identifiers and weather are comprehensively considered, rapid establishment of simulation and test typical scenes is realized, the problems of low test feasibility, long time consumption and high cost during automatic driving vehicle test are solved, and resource waste is avoided.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method for dynamic simulation of air traffic flight posture
InactiveCN101201870ASimulation is flexibleSimulation is accurateSpecial data processing applicationsOperational systemDecision taking
The invention belongs to simulation of a computer. Dynamic correction is added on the analysis basis of acquiescent airspace situation to stack various dynamic factors on static airspace situation information based on GIS information and the information forecasted before the simulation starts is corrected by applying real-time meteorological information, AFTN telegram information and radar information which are received during the simulation. Windows operating system is employed to form on the basis of the ATC system and the used radar information, flying information and aeronautical information are all introduced from the ATC system. The simulation treatment process is carried out respectively at the front end data processing, database processing, server processing, emulating display and simulation terminal modules. The introduction of various real-time uncertain dynamic factors makes up the shortage of static simulation technology, thereby reflecting the future flying status more comprehensively and factually, improving the rationality and correctness of traffic situation simulation in space and providing more reasonable and effective decision support for the fields such as airspace management and planning, traffic control, flow management, etc.
Owner:WISESOFT CO LTD
A simulation-to-seismic workflow construed from core based rock typing and enhanced by rock replacement modeling
The disclosed embodiments include a system and method for performing a simulation to seismic process. In one embodiment, the system is configured to perform operations comprising constructing a petrophysical realization and selecting a candidate model for fluid flow simulation using the petrophysical realization. Empirical petrofacies definitions is applied on the selected candidate model and assigning relative permeability at each node of the petrofacies definitions of the selected candidate model. The operations performs flow simulation on selected candidate model and performs analysis on the results of the simulation on selected candidate model to verify rock type flow units. The dynamic and static simulation results are synthesized such that the combined data yield a measurable rock property that may be compared to seismic properties and used to calibrate subsequent iterations of the static earth model. The continued iteration of the workflow may then be undertaken with the updated / refined earth model.
Owner:LANDMARK GRAPHICS
Method for modeling SiC MOSFET simulation model
The present invention discloses a method for modeling a SiC MOSFET simulation model, which comprises the following steps: modeling a SiC MOSFET with an equivalent circuit modeling method to obtain a first model; modeling a static property of the SiC MOSFET according to a transfer characteristic curve and an output characteristic curve provided by Datasheet of the SiC MOSFET and the first model to obtain a static simulation model of SiC MOSFET; modeling a dynamic property of the SiC MOSFET based on a C-VDS curve provided by the Datasheet of the SiC MOSFET and the first model to obtain a dynamic simulation model of the SiC MOSFET. By using the modeling method according to the present invention, a more accurate SiC MOSFET simulation model can be established. In addition, the modeling method has universality.
Owner:BEIJING JIAOTONG UNIV
Bolt fastening force ultrasonic detection and key detection parameter determination method based on finite elements
ActiveCN108896230AAccurate detectionImprove practicalityMeasurement of torque/twisting force while tighteningStress distributionElement model
The invention provides a bolt fastening force ultrasonic detection and key detection parameter determination method based on finite elements. The method is suitable for bolting force ultrasonic soundtime nondestructive measurement. The finite element theory and the acoustic elasticity principle are combined, and a bolt fastening force ultrasonic detection principle model is established. A bolt finite element model and a static simulation are established, the bolt axial stress distribution rule on the ultrasonic propagation path is obtained, so that the shape factor of the bolt is determined.The ultrasonic detection coefficient of the bolt fastening force is calculated by combining the acoustic elasticity coefficient of the bolt material measured by the critical refraction longitudinal wave. The method is low in cost and good in adaptability, and the detection coefficient can be accurately and quickly determined.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Double-channel monopulse radar tracking dynamic target aircraft real-time phase calibration method
Owner:UNIT 63680 OF PLA
Leakage detection method for large complex natural gas pipeline network system
ActiveCN106844814ANot subject to leak timeDesign optimisation/simulationSpecial data processing applicationsEngineeringCorrelation analysis
The invention discloses a leakage detection method for a large complex natural gas pipeline network system. The method comprises the steps of 1, performing static simulation to obtain a pressure along a line, flow and initial distribution of temperature in a pipeline; 2, performing online simulation to obtain a pressure along the line, flow and real-time distribution of temperature in the pipeline; 3, performing parameter learning, and proposing a pipeline transient flow state space model-based pipeline parameter real-time online estimation and learning model based on an implicit method and characteristic line method-based gas pipeline dynamic simulation state space model according to a sensitivity analysis theory; and 4, performing leakage detection, calculating a deviation between a simulated pressure and an actually measured pressure of each pressure measurement point, and realizing leakage state identification and diagnosis of the large complex oil and gas pipeline system through correlation analysis of simulated and actually measured pressure deviation distribution. The limitation of sectional detection is broken through, and a leakage detection system for the CPM (Computational Pipeline Monitoring)-based large complex natural gas pipeline system is established.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method and system for simulating on-chip power supply network
ActiveCN102663166ASmall footprintHas linear complexitySpecial data processing applicationsVoltage vectorLinear complexity
The invention discloses a method and a system for simulating an on-chip power supply network. The method comprises the following steps: step 1, reading in an SPICE (simulation program with integrated circuit emphasis) netlist; step 2, establishing a power supply network topological diagram; step 3, establishing a matrix equation Ax=b, wherein A is an electric conduction matrix of n*n, x is a knot voltage vector to be solved of the power supply network, b is current and n is number of thin grid points; and step 4, solving a roughened operator by utilizing a grid point dual polymerization algorithm, and solving the matrix equation by utilizing the roughened operator. The invention provides a static simulation project for the power supply network, and the simulation project is more stable and efficient, and less in occupied memory, and has linear complexity, under the condition that the solving precision appointed by the user is satisfied, the project can achieve an analysis of a knot voltage drop of the power supply network in an appointed form of the SPICE net list in a way that the operation time is reduced and the memory is used as little as possible.
Owner:TSINGHUA UNIV
Bolt fastening axial force ultrasonic detection method based on differential method
InactiveCN111307357AImprove adaptabilityImprove practicalityMeasurement of torque/twisting force while tighteningDesign optimisation/simulationElement modelLongitudinal wave
The invention provides a bolt fastening axial force ultrasonic detection method based on a differential method, which comprises the following steps: (1) establishing a mathematical relationship between bolt fastening axial force and ultrasonic propagation time difference, and establishing a bolt fastening axial force ultrasonic detection principle model; (2) establishing a finite element model ofthe bolt connection structure, carrying out static simulation, obtaining axial stress data on the central axis of the bolt, and calculating to obtain a bolt shape factor; (3) carrying out a loading test in combination with the critical refraction longitudinal wave, and carrying out linear fitting on the loading stress and the measured time difference to obtain the acoustic elastic coefficient of the bolt material; and (4) substituting the bolt shape factor, the acoustic elastic coefficient and other bolt material attribute parameters into the detection principle model, and determining the boltfastening axial force ultrasonic detection coefficient. According to the method, the adaptability of a detection model is improved, and ultrasonic detection coefficients of the bolt under different specifications and different connection states are obtained; the method is low in cost and good in adaptability, and accurate and quick determination of ultrasonic detection parameters is achieved.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Dynamic simulation method and device aiming at coexistence of system interference
ActiveCN102104895ASimulation results are accuratePower managementSignal-to-noise ratio (imaging)Mobile communication systems
The invention discloses a dynamic simulation method and a dynamic simulation device aiming at coexistence of system interference, which are used for solving the problem that a simulated result obtained by static simulation in the prior art is not close to that of an actual system and inaccurate. The method comprises the following steps of: determining a measurement signal-to-noise ratio on each time point of each system chain and a modulation coding manner corresponding to a signal-to-noise ratio threshold value interval where the measurement signal-to-noise is positioned on the point of time, and controlling emission power of a mobile communication system according to the acquired modulation coding manner corresponding to each system chain on at least one point of time. In the embodiment of the invention, the modulation coding manner of each system chain is adjusted according to the currently determined measurement signal-to-noise ratio of each system chain, and the emission power of the mobile communication system is controlled by the adjusted modulation coding manner; consequently, so that the mobile communication system adopting a self-adaptive coding manner makes the simulated result more accurate and closer to that of the actual system.
Owner:CHINA MOBILE GROUP DESIGN INST
Indoor detection method for angle tracking precision of swinging mirror
ActiveCN103674058ARealize measurementMeet different station distance requirementsAngle measurementEngineeringTotal station
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Construction-vehicle cab with novel roll-over protection structure, and dynamic design method thereof
InactiveCN101561835AImprove safety and reliabilityDramatically improve safety and reliabilitySoil-shifting machines/dredgersSpecial data processing applicationsEnergy absorptionWeld seam
The invention provides a construction-vehicle cab with novel roll-over protection structure, and a dynamic design method thereof, and belongs to the research field of safe construction-vehicle cabs. The dynamic design method for the construction-vehicle cab with the novel roll-over protection structure comprises the following steps: 1. preliminarily designing a roll-over protection structural proposal, as well as section shape, size, joint form and welding-seam type of each bearing component and auxiliary component; 2. performing static simulation of the safety performance of the roll-over protection structure; 3. performing static test on the roll-over protection structure; 4. performing dynamic simulation of whole-vehicle roll-over; 5. performing dynamic test on a whole vehicle; and 6. optimizing structural design based on an orthogonal test method. An energy guiding sleeve and an energy-absorbing structure are arranged in a cab frame of the construction-vehicle cab with novel roll-over protection structure. The invention can greatly increase the standard and high efficiency of the construction-vehicle cab design method, and improve the rate of passing destructive test at a time. The provided construction-vehicle cab with the novel roll-over protection structure is greatly improved in safety and reliability, low in cost and easy to manufacture and popularize.
Owner:JILIN UNIV
CAD-based visual gas pipe network static simulation system and calculation method thereof
PendingCN111898228AReduced adjustment calculation timeReduce computing timeGeometric CADSpecial data processing applicationsDatasheetData acquisition
The invention discloses a CAD-based visual gas pipe network static simulation system and a calculation method thereof, thereby carrying out simulation calculation on a gas pipe network. The system comprises a data acquisition module, a simulation calculation module and a result display module. The data acquisition module comprises a CAD data input module; the CAD data input module is used for inputting known parameters of hydraulic calculation of a gas pipe network into a real-time database module for storage through a visual CAD graphic environment; the simulation calculation sub-module acquires known hydraulic calculation parameters of the gas pipe network, establishes a gas pipe network simulation model, establishes a node pressure equation set according to known hydraulic calculation parameters of the gas pipe network, and calls a simulation model solving sub-module to solve the gas pipe network simulation model to obtain parameters to be solved, and displays, outputs and stores the calculated values of the parameters to be solved and the known hydraulic calculation parameters of the gas pipe network through an Excel data table or a CAD graph.
Owner:姚成蔚
Power transformer winding short-circuiting transient stress analysis method and device
ActiveCN107423528AImprove short circuit strengthTransformers/inductances coils/windings/connectionsDesign optimisation/simulationEngineeringElectromagnetic field
The embodiment of the invention discloses a power transformer winding short-circuiting transient stress analysis method and device. A three-dimensional magnetic structure coupling model of a three-phase transformer is built, static simulation of winding short-circuiting is pre-conducted on the coupling model, the stress result of a winding is obtained, according to the stress result of the winding, coil modeling is further conducted on the coupling model according to the stress result of the winding, a refined transformer model is obtained, under the three-phase short-circuiting condition, transient electromagnetic field simulation analysis is conducted on the refined transformer model, the transient stress of a single coil of the winding is analyzed, a transient stress curve showing the change of winding coils along with time is obtained, and a forceful basis is provided for the accumulative effect of a deformer under the short-circuit impact, the anti-short-circuit strength improvement of the deformer and other kinds of related research.
Owner:GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
Method and device for evaluating performance of system
ActiveCN102957572AReflect time-varying characteristicsEmbodied Processing GainData switching networksWireless communicationEvaluation resultAir interface
The invention relates to the field of communication, and discloses a method and a device for evaluating the performance of a system. The method and the device are used for evaluating the performance by dynamic simulation while the static simulation evaluation efficiency is achieved. The method includes evaluating a corresponding relation among static index values and dynamic index values in a dynamic preliminary simulation mode; using dynamic and static interfaces for semi-static simulation; acquiring air-interference performance parameters of UE (user equipment) via output of static simulation; and mapping the air-interface performance parameters to the dynamic and static interfaces according to a certain mapping method to obtain relevant output of dynamic simulation. Accordingly, an effect of evaluating the performance by the dynamic simulation is realized while the static simulation evaluation efficiency is achieved, in other words, time-variant characteristics of a channel and processing gains of a transmission mode and algorithms such as a detection algorithm are embodied via simulation evaluation results on the premise that the simulation evaluation efficiency is improved, the reliability of simulation evaluation for the performance is guaranteed, and processing time required by the simulation evaluation is saved.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Memory space simulation method for embedded processor
ActiveCN102541623AReduce space sizeSimulation speedSoftware simulation/interpretation/emulationMass storageParallel computing
A memory space simulation method for an embedded processor is provided. The method can simulate the complete memory space of the embedded processor and simulate the complete memory space with a large capacity by adopting a paging mode, and only simulates an actually used part of the memory space in a program under a paging mechanism so as to save space expenditure required by the simulation. The memory space simulation method for the embedded processor adopts a mixed simulation method combining static simulation and dynamic simulation according to different address ranges and achieves the memory space simulation mechanism with a large capacity which is high in efficiency and low in expenditure.
Owner:BEIJING INST OF CONTROL ENG
Static simulation system for dynamic wireless charging
ActiveCN109873504AMeet the testing needs of flexible configurationRealize mutual inductance fluctuation simulationCharging stationsCircuit arrangementsLoop controlEngineering
The invention discloses a static simulation system for dynamic wireless charging, and belongs to the field of wireless electric energy transmission. The problem that an existing wireless power supplystatic simulation method is not flexible enough in receiving end configuration, and insufficient in simulation capacity for extremely high driving speed is solved. The system comprises a current controller, n transmitting ends and n receiving ends; the n transmitting ends and the n receiving ends are corresponding one by one to form n pairs of combinations; the transmitting end and the receiving end in each pair combination are relatively static; a transmitting coil of the transmitting end in each pair of combination is magnetically coupled with a receiving coil of the corresponding receivingend, so that the receiving end in each pair of combination can obtain time-varying induced voltage for simulating a real driving fluctuation rule; the magnetic coupling mutual-inductance coefficient in each pair of combination is fixed; the current controller controls the n transmitting ends in an open-loop control way according to the distribution characteristics of magnetic coupling mutual-inductance space between the transmitting end and the receiving end in each pair of combination, so that the transmitting coils in the n transmitting ends can produce time-variable current excitation sources. The system is mainly used for wireless power supply tests.
Owner:HARBIN INST OF TECH
Simulation model, skin thereof and manufacturing method of simulation model
ActiveCN102568290AIncrease elasticityGood flexibilityInorganic adhesivesEducational modelsElastomerTear resistance
The invention relates to a simulation model, skin thereof and a manufacturing method of the simulation model. The simulation model comprises a lining framework, wherein a shaped and carved sponge model body covers on the surface of the lining framework, a first glass glue layer is coated on the surface of the sponge model body in a scraping way, the glass glue layer is adhered with a velvet enhancement layer, and an epidermal layer is coated and brushed on the surface of the velvet enhancement layer. A living dynamic or static simulation model which has an excellent performance and a soft quality and is rich in high elasticity can be obtained through structuring the dual combination of a tear-resistant elastic body and a foaming sponge body. The simulation model has the excellent performances of tear resistance, flexibility, corrosion prevention, water resistance, high-resilience simulation skin and the like, and can be used for related fields of living simulation of animals, characters, dinosaur museums, entertainment places, artworks and the like. According to the simulation model disclosed by the invention, desired products can be directly manufactured according to modeling without remaking a mould.
Owner:华强方特(深圳)智能技术有限公司
Equivalent static simulation method of dynamic wireless power supply based on open-circuit voltage of receiving end
The invention provides an equivalent static simulation method of dynamic wireless power supply based on an open-circuit voltage of a receiving end, belongs to the field of wireless electric energy transmission, and solves the problem that a scheme argumentation stage is time-consuming and labor-consuming since a practical dynamic driving platform needs to be established to conduct experiment argumentation and condition tests on a dynamic wireless power supply system in the prior art. According to the static simulation method, the reception of a coil open-circuit voltage by a dynamic wireless charging device is simulated through control of a current of a transmitting coil Lp of a static wireless charging device so that the dynamic-to-static simulation is realized. The method is mainly usedfor simulating dynamic wireless power supply.
Owner:HARBIN INST OF TECH
Anchor-pulling test method for simulating anchor recess of real ship
InactiveCN107292008AAvoid repeated revisionsSave human effortVessel designingDesign optimisation/simulationDesign softwareMaterial resources
The invention provides an anchor-pulling test method for simulating an anchor recess of a real ship. The method is characterized by comprising the following steps of 1, drawing an actual shape of the anchor recess according to a location dimension of a design drawing and a lines plan of a ship hull plate; 2, simulating multiple states of an anchor during dropping, judging whether the anchor is collided with a bulbous bow plate or not, and according to the judgment, determining the position of an outlet point of a hawse pipe; 3, simulating a state of the anchor when an anchor rod just enters the hawse pipe in a lifting process, judging whether an anchor sticking phenomenon occurs or not, and according to the judgment, determining an included angle between a central line of the hawse pipe and a vertical direction; and 4, simulating a state of the anchor during lifting in the anchor recess, and according to the state, determining the length of the hawse pipe, an angle of an anchor recess backboard, and the height of an anchor mouth. According to the method, by statically simulating an anchor-pulling test process on design software of a computer, a few defects of anchor recess design can be discovered in advance and then corresponding modification is performed, so that repeated modification of the hawse pipe and an anchor rack in an anchor-pulling test is avoided and manpower and material resources are saved.
Owner:CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
Simulation method and simulation device
ActiveCN102958089AReflect time-varying characteristicsImprove efficiencyTransmission monitoringChannel estimationTransfer modeDependability
An embodiment of the invention relates to the technical field of wireless communication, in particular to a simulation method and a simulation device, which are used for reflecting time-variation characteristic of signal channels on the premise of efficiency improvement and are capable of reflecting processing gain of transmission modes and algorithms such as detection algorithm. The simulation method includes: by means of dynamic pre-simulation, determining corresponding relation between a dynamic index value and a static index value which correspond to simulated scenes; according to the determined corresponding relation between the dynamic index value and the static index value, determining the dynamic index value, corresponding to the static index value, obtained by means of static simulation. By the simulation method and the simulation device, both simulation efficiency and performance of systems can be considered. Simulation efficiency is improved greatly since the simulation process is simplified and loss of the simulation performance is low. Assessment performance of dynamic simulation can be acquired according to the static simulation efficiency, so that the assessment performance is improved on the basis of guaranteeing performance reliability.
Owner:DATANG MOBILE COMM EQUIP CO LTD
Application method based on EOASM algorithm in construction of agent model of stacking robot driving arm base
ActiveCN112446110AEasy processSimple processGeometric CADDesign optimisation/simulationPerformance functionAlgorithm
The invention discloses an application method based on an EOASM algorithm in construction of an agent model of a stacking robot driving arm base. Because computer simulation is needed when the complexengineering problem is solved, the cost is high, and the period is long, the invention provides a combined agent model construction method (EOASM method) based on local error expectation point addition, and the combined agent model construction method is applied to maximum stress modeling of a stacking robot driving arm seat. Firstly, a geometric model of a driving arm seat is constructed; secondly, an initial sample is formed, the maximum stress of the driving arm seat is selected as a performance function, and a static simulation model is called to obtain a real response value of the initial sample; then, an initial Kriging and RBF agent model is constructed; and finally, a final combined agent model meeting the precision requirement is constructed through the EOASM algorithm provided by the invention. According to the EOASM algorithm provided by the invention, the model prediction precision can be ensured, the total number of samples can be as low as possible, the robustness is relatively high, and the application prospect is relatively wide.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Distributed Bayesian online fault diagnosis method for dynamic and static information of megawatt ultra-supercritical unit
ActiveCN108615111AImprove online diagnostic performanceImprove performanceResourcesInformation technology support systemDiagnosis methodsStatic simulation
The invention discloses a distributed Bayesian online fault diagnosis method for dynamic and static information of a megawatt ultra-supercritical unit. The distributed Bayesian online fault diagnosismethod aims at the problem that fault types of the megawatt ultra-supercritical unit is difficult to distinguish due to diversification of fault information, and comprises the steps of adopting a Bayesian network classifier to capture the static information of faults; extracting the dynamic information of the faults by combining with a slow feature analysis algorithm; and finally, utilizing the dynamic and static fault information to construct an online fault diagnosis model for improving the accuracy rate of fault diagnosis. The distributed Bayesian online fault diagnosis method overcomes theproblem of insufficient extraction of the fault information caused by excessive variables of a large-scale coal-fired unit, effectively solves the problem of difficult online diagnosis of faults comprising diversified dynamic and static fault information, greatly improves the online diagnostic performance of the indistinguishable unit faults, and facilitates a thermal power plant to check and repair the factory effectively and timely, thereby ensuring the safe and reliable operation of the megawatt ultra-supercritical generating unit.
Owner:ZHEJIANG UNIV
System for safety detection of working reliability of mortar projectile series fuze
Owner:ORDNANCE TECH RES INST OF THE GENERAL ARMAMENT DEPT PLA
Method of disposing dummy pattern
InactiveUS20060199284A1Simple methodSemiconductor/solid-state device manufacturingComputer aided designParasitic capacitanceEngineering
A method of disposing a dummy pattern includes the steps of obtaining an inter-wiring parasitic capacity and a wiring total parasitic capacity for each wiring using wiring layout data and initial dummy pattern layout data; creating a first data base based on the inter-wiring parasitic capacity; creating a second data base based on the wiring total parasitic capacity; performing dynamic and static simulations for creating a third data base storing the results of the dynamic and static simulations, the result of the dynamic simulation being information about the first wiring, and the result of the static simulation being information about the second wiring; and performing an additional insertion of dummy pattern near a third wiring, the third wiring being determined to be a wiring which is capable of be affected by voltage noise based on the data in the third data base.
Owner:LAPIS SEMICON CO LTD
Power grid steady state frequency estimation method considering security control policy and primary frequency modulation characteristic
ActiveCN107046289ACalculation speedPower oscillations reduction/preventionFrequency modulationLoad following power plant
The invention discloses a power grid steady state frequency estimation method considering a security control policy and a primary frequency modulation characteristic, which belongs to the field of safety and stability analysis of a power system. According to the invention, based on the static frequency characteristic of a load, the power grid steady-state frequency after a fault is estimated through a security control action behavior and the quasi-static simulation of the primary frequency modulation characteristic of a power generator. The method comprises the steps that the steady-state frequency of each synchronous power grid is calculated according to the active unbalance of each synchronous power grid after fault removal and the implementation of the emergency control measures; the power grid steady-state frequency of an acted centralized low-frequency control system or an acted centralized high-frequency control system is calculated round by round; when the steady-state frequency is less than the basic wheel action frequency of a low-frequency load-shedding device, the power grid steady-state frequency after the basic wheel action of the low-frequency load-shedding device is calculated round by round; and finally, according to the primary frequency modulation capability of the power generator and the active static frequency characteristic factor of the power grid, the power grid steady-state frequency considering the security control policy and the primary frequency modulation characteristic is calculated. The method provided by the invention has the advantage of fast calculation, and the precision can meet engineering requirements.
Owner:NARI TECH CO LTD +3
Engine electric control system component function testing system and method
InactiveCN104281146ASimple structureLow costElectric testing/monitoringFunctional testingElectronic throttle
The invention provides an engine electric control system component function testing system which comprises a draw-bar box. A detection panel is fixed into the draw-bar box. A compression air pump, an electronic control unit (ECU), a power line spigot connected with the electronic control unit (ECU), a 220V power supply switch, a 24V power supply switch, a potential knob, an EPR system interface, a low-pressure electromagnetic valve interface, a waste gas control valve interface, an electronic throttle valve interface, an oxygen concentration sensor interface, a DEPR system interface and an OBD system interface are distributed on the detection panel. The OBD system interface is externally connected with a PC terminal through a CAN communication diagnosis harness. The method includes the step that a static simulated engine dynamically detects input and output of an engine electric control unit component. The system and the method have the advantages that operation environment of an electric control unit is simulated through combination of software and hardware, the operating state of the electric control unit is monitored through the software so that whether the electric control unit breaks down can be judged, the structure is simple, cost is low, moving is flexible and operation is convenient to carry out.
Owner:SINOTRUK JINAN FUQIANG POWER
Complex traffic form-oriented control grid division method under vehicle-road cooperation condition
The invention relates to the technical field of complex traffic control, in particular to a complex traffic form-oriented control grid division method under a vehicle-road cooperation condition. The method divides a road into control grids by using a boundary of communication transmission on the basis of a road side unit layout topology, so that the grids have road information perception capability and control capability, and real vehicle-road cooperative traffic control is formed. The method comprises the following steps: S1, establishing an urban road traffic static simulation model; S2, ina vehicle-road cooperation environment, performing operations by using the real-time monitoring capability of a road side unit; S3, performing operations in the urban road traffic dynamic simulation model in the step S2; S4, based on the urban road traffic dynamic simulation model, establishing a traffic information base; S5, applying, by a vehicle user, for a user node role; and S6, by a trafficinformation base, providing road traffic information for registered vehicle users.
Owner:BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +2
Hollow shaft type hydrostatic bearing dynamic designing method
InactiveCN103235856AImprove operational reliabilityReduce manufacturing costSpecial data processing applicationsEngineeringStatic simulation
The invention discloses a hollow shaft type hydrostatic bearing dynamic designing method. By means of the method, dynamic design of a hollow shaft type hydrostatic bearing is achieved through the steps of conducting scaling hollow shaft type hydrostatic bearing preliminary arrangement, conducting a scaling ball mill hollow shaft type hydrostatic bearing static simulation research, conducting a hollow shaft type hydrostatic bearing static experiment research with qualified scaling ball mill static simulation, conducting a hollow shaft type hydrostatic bearing dynamic simulation research with qualified scaling ball mill static experiments, conducting a hollow shaft type hydrostatic bearing dynamic experiment research with qualified scaling ball mill dynamic simulation and conducting hydrostatic bearing optimization design. Compared with the existing similar designing methods, the method improves running reliability of the hollow shaft type hydrostatic bearing and reduces manufacturing cost, use energy consumption and maintenance cost of the hollow shaft type hydrostatic bearing.
Owner:KUNMING UNIV
Outdoor measuring method for dynamic characteristic of flow field in rising and landing periods of airplane and smoke generating device for measurement
InactiveCN105865740AHigh reference valueReduce testing costsAerodynamic testingJet aeroplaneMeasurement device
The invention provides an outdoor measuring method for dynamic characteristic of a flow field in rising and landing periods of an airplane and a smoke generating device for measurement in an airplane outdoor true environment based on an unmanned aerial vehicle. A human-driven testing airplane is replaced by a dynamically similar unmanned aerial vehicle, thereby reducing testing cost and risk. The outdoor measuring method is suitable for testing and comparison of a novel layout airplane in a designing and developing period. Compared with a wind tunnel static simulation test, the outdoor measuring method is advantageous in that the outdoor measuring method is a dynamic measuring method through placing the to-be-measured airplane and the measuring device in the outdoor true flight environment, thereby realizing truer testing environment and high reference value of obtained experiment data. Furthermore, according to the outdoor measuring method, the visual characteristic of the flow field of a smoke tunnel is combined with environment authenticity of a flight environment, and a new thought is supplied for verifying airworthiness compliance of a large-size transporter airplane in the rising and landing periods.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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