110results about How to "Realize dynamic simulation" patented technology

The invention relates to a transformer substation field operation management and control system and method based on three-dimensional dynamic modeling. The method comprises the following steps: performing three-dimensional dynamic modeling on a transformer substation; accurate positioning; based on the three-dimensional digital model, carrying out intelligent management and control on an operation site through intelligent identification and early warning; based on a three-dimensional digital model, performing live-action rehearsal and equipment simulation training on typical production operation and safety accidents through a virtual reality system. According to the invention, visual data support is provided for field operation work and personnel training work; real-time positioning and track checking of personnel and equipment are realized, and visual technical support is provided for remote intelligent management and control; an intelligent management and control means is provided for field operation safety, dynamic simulation of an operation task plan, typical operation, dynamic rehearsal of safety accidents and disassembly and reassembly analogue simulation of typical equipment are achieved, a visual simulation scheme is provided for field operation, operation risks are reduced, immersive training experience is provided, and training efficiency is improved.

The invention discloses a computer simulation performance computation method of a refrigeration system under a frosting working condition. The computer simulation performance computation method comprises the following steps of respectively establishing a wet air physical property computing module, a coolant physical property computing module, a condenser structure computing module, an evaporator structure computing module and an evaporator frosting computing module; and establishing a refrigeration circulation system computing module. On the basis of simulating the variation of a frost layer of an evaporator, the variation of the whole refrigeration circulation operation situation is caused due to the variation of evaporation temperature. Through the computer simulation performance computation method disclosed by the invention, design can effectively avoid the system abnormal work risk due to frosting; simultaneously, effective geographic data is effectively provided for defrosting control of a refrigeration system, and the refrigerating output and the energy efficiency ratio of the refrigeration system are more effectively improved. Computing time is subjected to uniform step length partition firstly, and complex iteration computation is carried out on the structure and heat exchange parameter in a program by utilizing computer accessory appliances. The method in the invention realizes the dynamic simulation of a whole system under the frosting working condition.

The invention relates to a method for setting a high-pressure high-power thyristor electrothermic model and a simulating method. In the invention, first a thermal impedance model of a thyristor is calculated and set according to the finite element method, and a Foster network thermal impedance model is expressed by the identical transformation, subsequently a thyristor equivalent electric model is set by using the mathematical method. The loss Pave(t) is determined by the switch-on forward voltage drop Vtm and the working current IA, an electrothermic model of the thyristor is set by connecting the relation of the variants such as the switch-on forward voltage drop Vtm, the working current IA, the loss Pave(t), the junction temperature TJ and the like, then the simulation is conducted on a Pspice software. The model of the invention contains a thermodynamics and electrics model, which can provides the dynamic relationship between the heating parameters and the electric parameters, can be used for simulating the transient and steady junction temperature change and predicting whether the thyristor works in the safe area, also used for insulating the junction temperature change under the sine semi-wave surge current surge and predicting whether the thyristor fail.

The invention provides a method for simulating dynamic target signals with high accuracy, aiming to provide a treatment method which has little hardware resource consumption and can carry out remote and high-accuracy dynamic simulation. In the method, distance measurement sounds are obtained by carrying carrier demodulation on received intermediate frequency signals and are stored in a memory group used as distance delay, a Doppler frequency corresponding to speed in track parameters is added on a data reading clock to carry out asynchronous data reading and writing, a double-port RAM (RandomAccess Memory) is utilized as a distance delay memory, an extremely remote distance is divided into thick and thin distances by a limited storage space to carry out combination simulation or carry out step simulation based on the requirements of distance and the accuracy; and a sum path direction, a difference path direction and a difference path pitching attenuator are utilized to calculate sum and difference signal amplitude based on angle data and an antenna direction diagram in the rack parameters, calculate the attenuation quantity of the attenuator and respectively control sum path output signal amplitude and difference path output signal amplitude to carry out angle simulation, thereby realizing dynamic simulation with different distances and different accuracy.

The invention provides an optimization modeling method for coupling of production and energy of continuous enterprises. The method comprises the following steps: establishing a CEECOM unit model X; setting an information parameter of a CEECOM production dispatch velocity model psi to generate a CEECOM system model; determining the material type and listing a constraint equation according to the Petri network topology structure of the CEECOM system model; and running a simulation algorithm to calculate energy consumption and generate a corresponding curve. The method adopts a color expansion blending Petri network method, and gives consideration to energy flow, material flow and information flow. The modeling method of the invention has strict theoretical foundation, is concise, convenient and easy, and is suitable for practical use. The method realizes reoccurrence of energy consumption process of enterprise production by acquiring data from a DCS or database. Safety pre-warning is provided regarding unsafe information parameter of energy consumption equipment (unit) in enterprise production energy consuming activities, and the control model implements corresponding processing if a corresponding measurement cannot be obtained within the safety pre-warning time. The method can be jointed with an ERP so as to realize dynamic simulation in the enterprise production energy consuming process.

The invention discloses a plant rhizosphere box and the application thereof in the micro-domain research of wet land plant rhizosphere. The plant rhizosphere box comprises a box body, the inside space of the box body is partitioned into a root zone, a near root zone, a far root zone and a non-root zone and other different rhizosphere micro-domain partition zones by a number of rhizosphere partition plugging plates, water distribution units are arranged on the upper part of the box body, and water level regulating units are also arranged on the box body; and a water discharging device is arranged on the bottom of the box body. Through the adjustment of the intervals between the different rhizosphere micro-domain partition zones, the accurate observation and the research of the differentiation changes of different distances from the root system, and/or root zone soil, and/or interval water nutrients, pollutant, and/or microorganism are achieved. Based on the plant rhizosphere box, water flooded habitat of plants grown in wet land can truly be simulated, so that water flow conditions in the substrate can be maintained, and different water pressure retention time and water levels are arranged according to the needs, and the plant rhizosphere box has wide application prospect in plants, especially in the micro-domain research of wet land plant rhizosphere.

The invention discloses a full-link full-process simulation system and method for an airborne infrared stabilized sighting system and aims to achieve full-link full-process simulation of the airborne infrared stabilized sighting system in laboratory conditions. The system comprises a target simulation module, a background simulation module, an environmental simulation module, a sensor simulation module, a carrier platform simulation module, an airborne stabilized sighting servo control simulation module and an infrared image generation module. The method includes the steps of 1, target simulation; 2, background simulation; 3, atmospheric effect simulation; 4, sensor effect simulation; 5, initial generation of infrared images; 6, judgment of whether a carrier platform is stabilized or not; 7, stabilized control simulation; 8, infrared target detection and tracking simulation; and 9, infrared image generation. The system has the advantages that considered links are complete, and dynamic simulation and signal stream transmission are achieved. The method has the advantage that infrared target tracking can be achieved.

The invention discloses a method for predicating the residual intensity of a metal gradient material with cracks. According to the method, a finite element model is utilized, discontinuous displacement interpolation functions of an expansion unit are adopted for characterizing crack behaviors in the model, the crack length is taken as a variable to track crack tip positions so as to dynamically judge stress intensity factors of crack tips and the fracture toughness size corresponding to the crack tips, so that whether cracks are expanded are determined, and predication on the residual intensity of the gradient material is realized. The method has the advantages that geometrical cutting is not needed during the establishment of the finite element model, a crack tip grid is not needed to be subdivided, and the precision is higher.

The invention discloses an unmanned ship energy efficiency intelligent optimization simulation system and a method, and the system comprises a ship end data collection unit which can collect the shipend data of a sailing ship in real time, carries out the local backup and storage, and transmits the ship end data to a shore-based energy efficiency monitoring unit; a shore-based energy efficiency monitoring unit which can store ship-side data and meanwhile obtain and display an evaluation result corresponding to the ship-side data; and a shore-based energy efficiency intelligent decision-makingsimulation unit which can store the received data and determine an intelligent decision-making result, namely the optimal navigational speed and the optimal navigational direction of the ship; and meanwhile, optimal control simulation and real-time display of the navigational speed and the navigational direction of the ship can be realized. According to the system, dynamic simulation of the shipoperation state and the energy efficiency state under different operation scenes and different control decisions can be realized, and the effectiveness and feasibility of the intelligent decision-making method formulated under different conditions can be verified through the simulation result, so that a foundation is laid for research and application of the intelligent energy efficiency optimization management technology of the unmanned ship.

The invention provides a method for constructing a power system dynamic simulation pressurized water reactor control system model. The method for constructing the power system dynamic simulation pressurized water reactor control system model comprises the steps that appropriate simplification and functional integration are conducted on an actual reactor control system, the reactor control system is decomposed into two sub systems according to functions, namely, a power control system and a temperature control system. The power control system and the temperature control system are used for stimulating that a nuclear power unit controls power to rise or reduce under a normal operating condition, simulating the nuclear power unit to adjust temperature and the power and maintaining stable operation under the situation that the power, voltage and frequency electric parameters disturb, and achieving electromechanical transient and medium and long term dynamic simulation of a large-scale power system including the pressurized water reactor nuclear power unit. By means of the method for constructing the power system dynamic simulation pressurized water reactor control system model, the problems that no accurate reactor control system model exists in an existing simulated program, and therefore dynamic characteristics of the nuclear power unit can not be actually reflected are solved, and a powerful tool for researching problems of the transition process inside the nuclear power unit, the mutual effect between a large-scale power grid and a high-capacity nuclear power unit, source network collaboration and the like is provided.

The invention discloses a dynamic flash flood simulation method based on an irregular unstructured grid model. The simulation method comprises the following steps: selecting a simulation area, and collecting data; performing grid division aiming at a complex computational domain and an irregular terrain by adopting an irregular unstructured grid; describing water flow by adopting a two-dimensionalunsteady flow shallow water equations, and solving the equations by using a finite volume method and a Riemann approximate solver; calculating flood arrival time, flood inundation time, maximum floodinundation water depth, maximum flood level and maximum flood flow velocity of each grid unit; and obtaining flood arrival time isograms, flood inundation time isograms, maximum flood inundation water depth isograms, maximum flood level isograms and maximum flood flow velocity isograms. According to the method disclosed by the invention, dynamic simulation and simulation of flood inundation processes in flash flood susceptible areas based on the complex computational domain and the irregular terrain can be realized, the flood inundation range, inundation water depth, flow field and other flood elements are simulated and calculated in real time, and the visualized simulation of the flood inundation process is realized.

The invention discloses a virtual assembly system based on a marine diesel engine. The virtual assembly system is mainly characterized by establishing a diesel engine model through 3dMax and carrying out setting for realizing disassembly and assembly function on each part of the diesel engine model in Unity 3D. The diesel engine model comprises a general assembly and a plurality of subassembly bodies. The virtual assembly system mainly comprises a structure cognition module, an assembly training module and a navigation module. The structure cognition module is used for displaying exploded views of the general assembly and the plurality of subassembly bodies, and when a mouse clicks a part, displaying text messages of the part. The assembly training module comprises a disassembly and assembly animation module and an animation control module. The disassembly and assembly animation module is used for displaying each assembly drawing disassembly and assembly process; and the animation control module is used for controlling states of the disassembly and assembly animation module. The navigation module is used for navigation jump between the structure cognition module and the assembly training module. The virtual assembly system realizes disassembly and assembly training and teaching of the diesel engine without on-site actual operation, and is low in cost and good in teaching effect.

The invention discloses a simulation modeling method for subway stray current distribution in an urban power grid. The method comprises the following steps: establishing an alternating-current power grid ground equivalent model according to a power supply mode and a topological structure of a power system, and solving ground equivalent resistance among grounding substations according to distancesamong the grounding substations, the magnitude of grounding resistance of a grounding grid and ground resistivity, thereby establishing an urban power grid ground equivalent network; connecting an external control current source element to a neutral line of a grounding transformer of a certain grounding transformer substation, and controlling the current source by adopting the actual measurement data of the neutral point direct current of the grounding transformer substation in the early departure period; and finally, simulating and adjusting the size correction model of the initial groundingresistance R of the equivalent power supply until a final simulation model is obtained. According to the method, the distribution rule analysis of the subway stray current in the urban power grid andthe influence factor research of the stray current distribution can be realized, and guidance suggestions are provided for the treatment of the transformer direct-current magnetic bias caused by the stray current.

The invention discloses a ship attitude dynamic simulation system for wind tunnel test and a working method thereof. The simulation system includes an optical flat plate, two triangular fixed blocks,a support rod, a motor subsystem, a rope, a ship model, a ship model base, an ear piece and an aviation floor. The simulation system of the invention is small in size, so it only needs to be installed above the wind tunnel, and the model is connected by pulling the rope, which does not affect the blockage degree of the wind tunnel flow field; the system has fewer components, which is convenient for installation and debugging in the wind tunnel environment, and the maximum angle of pitch and roll can be adjusted by adjusting the height of the model from the ground; according to the weight of the model, the impact of the test wind load can also be reduced, so that the accuracy of the roll and pitch motion angle of the ship motion simulation can be within 0.5 DEG; the system can also be usedwith relevant experimental equipment and instruments, so as to realize a series of dynamic experiments such as dynamic balance force measurement, dynamic pressure measurement, dynamic PIV phase-locked flow field measurement, etc., which greatly enriches the dynamic wind tunnel test contents of large ship models.

The invention relates to a crime scene fingerprint ridgeline leaving region frequency dynamic reconstruction method. The method comprises the following steps of performing identification and data extraction on a peripheral contour line of a scene fingerprint ridgeline coverage region; reconstructing a crime scene fingerprint ridgeline leaving region in a compared seal fingerprint; and performing dynamic reconstruction of a crime scene fingerprint ridgeline leaving region frequency. The method is mainly used for a super-large-scale fingerprint system of a multi-comparison algorithm framework; the image quality level of fingerprint system database establishment and the case-solving efficiency of the fingerprint system can be effectively improved; and the method is of outstanding significancein the aspects of "comparison and missing check risk analysis of the fingerprint system", "locking of a missing check target range", "feasibility assessment of actual application of various planar seal fingerprint image data to the field of forensic science", and the like.

The invention discloses a discrete element fluid-solid coupling numerical simulation method and a discrete element fluid-solid coupling numerical simulation system based on a GPU matrix. The discreteelement fluid-solid coupling numerical simulation method comprises the steps of: establishing a pore network model; establishing a fluid unit migration model, wherein fluid units in pores are connected through pore throats among particle units, permeation of the fluid units obeys the Darcy law, the flow of the fluid units is determined by rock and soil mass properties, pore throat diameters and the like, and water pressure, temperature and density have a function relational expression; and exerting fluid-solid coupling effect, wherein pore water pressure acts on the particles, and the particlemovement changes the pore volume, so that a fluid-solid coupling effect is realized. According to the discrete element fluid-solid coupling numerical simulation method, dynamic simulation of a large-scale fluid-solid coupling system can be realized, and the calculation speed and the calculation quantity of discrete element fluid-solid coupling numerical simulation are remarkably improved.

The invention discloses a gamma emitter position distinguishing system and method. The system is mainly characterized by comprising a reconnaissance plane and a test site; the reconnaissance plane comprises a data acquisition module, a signal processing module and a signal coupling output module; the test site comprises a signal demodulation receiving module and a data processing module; the data acquisition module is composed of a gamma ray detector and a GPS (global positioning system) module; the signal processing module is composed of a gain adjustment module, an analog filtering module and a data preprocessing module; the data processing module is composed of a data analysis and judgment module and a 3D (three-dimensional) dynamic simulation module. By the system and method, position detection of a gamma emitter can be realized quickly, and detection efficiency and detection accuracy are improved.

The invention discloses a drainage basin water environment simulation and prediction method and device based on multi-model coupling, and relates to the technical field of environmental water conservancy and computational mathematics. Comprising the steps of obtaining input data of a to-be-predicted drainage basin; inputting the input data into the water environment prediction model; and based on the input data and the water environment prediction model, obtaining a water environment simulation prediction result of the to-be-predicted drainage basin, and completing dynamic simulation of the water environment of the to-be-predicted drainage basin from the drainage basin to the water body to the ecology. By forming a multi-dimensional nested land hydrology, hydrodynamic force and water environment coupling simulation framework, dynamic simulation of a water environment from a drainage basin to a water body to water ecology can be realized.

The invention provides a method for decoupling an indoor temperature field of a building. The method comprises the following steps: firstly, determining all indoor thermal factors of the building; determining an indoor flow field type, and respectively setting a plurality of representative flow fields according to different flow field types; calculating a representative flow field by applying convection-radiation coupling simulation; fixing a representative flow field, setting a single thermal factor, and calculating the temperature distribution of each thermal factor; calculating a CRI valueof a single thermal factor; according to a CRI definition formula, calculating and obtaining each sub-temperature field by utilizing the heat productivity or heat absorption capacity of the thermal factor; determining whether all representative flow fields are decoupled or not, wherein each total temperature field is the linear synthesis of all the corresponding sub temperature fields. According to the method, the potential force range of each thermal factor in the space is quantitatively evaluated, the influence of different thermal factors on the space temperature field is independently analyzed, the indoor temperature distribution is more effectively and quickly predicted, and the indoor local temperature environment can be efficiently and accurately regulated and controlled by independently regulating and controlling the strength of an indoor heat source or heat sink.

The invention relates to a spacecraft propellant replenishing simulation test system which comprises a replenishing simulation device and a replenished simulation device. The replenishing simulation device is composed of a replenishing simulation main controller, a replenishing simulation data controller, a replenishing simulation measure and control instrument and a replenishing simulation starter. The replenished simulation device is composed of a replenished simulation main controller, a replenished simulation data controller, a replenished simulation measure and control instrument and a replenished simulation starter. The replenishing simulation device and the replenished simulation device are connected in an information interactive mode through a network and conduct simulation fault information interaction in the propellant replenishing simulation test process. According to the spacecraft propellant replenishing simulation test system, correctness of the replenishing flight procedure and the replenishing information protocol can be tested for verifying at the spacecraft ground testing stage, the manpower and time cost is greatly reduced, and the development cost of a spacecraft is reduced.

The invention relates to an intelligent contactor virtual prototype designing platform. The intelligent contactor virtual prototype designing platform comprises a type selection module, a parameter setting module, a calculating module and an analyzing module. The model selection module provide s host computer interface, and is used for the user to select the main circuit type, the control circuit type, the electromagnetic system type, the contact system type and the material type as needed; the parameter setting module sets parameters of the selected types after the type selection is determined; the calculating module comprises an electromagnetic field calculating model which includes three parts of an electromagnetic system dynamic model, a contact electrodynamic force calculating model and a circuit device electromagnetic model, and obtains dynamic characteristics of the absorption, holding and breaking whole process of the electromagnetic system under different control schemes, and obtains the electromagnetic field distribution parameter of the contact system when the contact system is loaded with different main circuits and the electromagnetic property parameters of the circuit and the device through the electromagnetic field calculating model; and the analyzing module analyzes the parameters obtained by the calculating module. The intelligent contactor virtual prototype designing platform comprehensively takes multi-field coupling of electricity, magnetism, heat, machinery and fluid into account.