95results about How to "Real-time simulation" patented technology

The invention discloses a group evacuation simulation system and method by combining an artificial bee colony and a social force model. The method comprises the following steps: acquiring an evacuation scene parameter to construct an evacuation scene three-dimensional model; finding all exits of the evacuation scene in the three-dimensional model; dividing to-be-evacuated crow in the evacuation scene into a plurality of groups according to the individual-to-individual relation and the position from the exit, screening the individual closest to the exit position in each group as a leader of each group; using each exit of the evacuation scene as the food source, and the leader as the leader bee in the group, thereby establishing one-to-one mapping with each parameter in the artificial bee colony; under the leading of the leader of each group, executing a parallel artificial bee colony algorithm to dynamically plan a path to move to the exit; and if the leader arriving the corresponding exit, waiting at the exit until the individual is inexistent in each group, and ending the crow evacuation simulation. Through the adoption of the method disclosed by the invention, the simulation efficiency and the channel efficiency in the public place are improved, and the assistance is offered for the real evacuation drill.

The invention discloses a data exchange method for electromechanical and electromagnetic transient hybrid simulation and relates to the technical field of transient stability research and digital simulation of power systems. The method comprises the following steps of: simulating an electromagnetic transient simulation power grid to obtain the electromagnetic transient simulation data, simulating an electromechanical simulation power grid to obtain the electromechanical simulation data, processing the electromechanical simulation data to obtain a three-phase instantaneous value Thevenin equivalent circuit model of the electromagnetic transient simulation power grid, correcting a power supply frequency and transmitting the parameters of the three-phase instantaneous value Thevenin equivalent circuit model to the electromagnetic transient simulation power grid through an interface bus; and processing the electromagnetic transient simulation data to obtain the active power and the reactive power injected into the electromechanical simulation power grid through the interface bus and form an electromechanical simulation interface bus model, so that the active power and the reactive power can be transmitted to the electromechanical simulation power grid. According to the data exchange method for electromechanical and electromagnetic transient hybrid simulation disclosed by the invention, the real-time simulation of the power grid in a relatively large scale is realized; and the hybrid simulation is not limited by the scale of the power grid.

The invention relates to a building method for an electric drive system hardware-in-the-loop simulation device. A converter, a motor and a position and speed sensor in a power transmission system are modeled through a hardware description language Verilog HDL and then are integrated into a field programmable gate array (FPGA) chip. The FPGA chip and an interface circuit form a virtual motor printed circuit board. The virtual motor printed circuit board is connected with an electric drive system controller printed circuit board to form the electric drive system hardware-in-the-loop simulation device. By the method, hardware-in-the-loop real-time simulation on an electric drive system can be performed and the quick development and product test of the electric drive system can be realized; moreover, the method has the characteristics of energy conservation, safety and low cost.

The invention discloses a route planning-based crowd evacuation simulation method and system. The method comprises the following steps of: creating an evacuation scene three-dimensional model, creating a three-dimensional figure model, and importing the three-dimensional figure model into the evacuation scene three-dimensional model; dividing a to-be-evacuated crowd into a plurality of groups according to positions of individuals and distances between adjacent individuals, and selecting a leader for each group; establishing a one-to-one mapping relationship between each parameter of crowd evacuation and each parameter of an artificial bee colony algorithm; carrying out macro route planning by adoption of the artificial bee colony algorithm, and searching a route, from an initial point to atarget point, of each individual; and carrying out micro crowd movement guidance by adoption of a social force model, and generating a collision-free crowd evacuation simulation movement. The methodis capable of realizing large-scale crowd evacuation simulation under different scenes.

The invention provides an echo signal simulation method, a system as well as an echo signal simulator. The method is applied to an echo signal simulator comprising groups of hardware processing chips. The method is performed through the following steps: obtaining the working information of a radar, preset fraudulent model information and electromagnetic waves sent by the radar according to the working information of the radar; using the working information of the radar and the preset fraudulent model information, and calculating fraudulent scattering information corresponding to the preset fraudulent model; calculating the modulation information of a plurality of scattering dots by the groups of hardware processing chips according to the working information of the radar, the fraudulent scattering information and the set of scattering dots' positions; calculating intermediate frequency echo signals based on the set of modulation information and electromagnetic wave digital information; and carrying out upconversion to the intermediate frequency echo signals so as to obtain fraudulent interfering echo signals. According to the invention, it is possible to simulate fraudulent interfering echo signals in a large scenario in real time, therefore raising experiment efficiency.

The invention discloses a cultural algorithm and particle swarm algorithm combination-based crowd evacuation simulation method and system. The method comprises the steps of building a three-dimensional model of an evacuation scene and searching for all exits of the evacuation scene; storing a to-be-evacuated crowd in a population space, performing grouping, screening out an individual closest to the position of a corresponding exit in each group as a leading individual of each group, and storing the individual in a belief space; establishing navigation used for associating the belief space with the population space by utilizing a cultural algorithm; transmitting the current position of the leading individual to the navigation, planning a shortest path of reaching the corresponding exit from the current position of the leading individual by the navigation, calculating a next position of the leading individual, and transmitting the next position to the leading individual; and taking the next position given by the navigation as a target, executing a particle swarm algorithm used for following the leading individual, and feeding back the position of the moved leading individual to the navigation: if the leading individual reaches the corresponding exit, re-screening out the leading individual of each group and storing the leading individual in the belief space until no individual exists in each group.

The invention provides a simulation and rendering method of a real-time sea system. The method comprises the steps of: dividing a screen space into a plurality of grids equally, and projecting the screen space to a sea level in a world coordinate system space, and obtaining a surface grid of seawater in the world coordinate system space; obtaining a coordinate deviant of a current grid point relative to the sea level, and obtaining a final coordinate value of the grid point; obtaining a normal value of the current grid point, and realizing a controllable seawater ripple effect; obtaining a normal value of a ripple arranged at the position of the current grid point, obtaining a final normal value of the current grid point, and realizing a sea level ripple effect when it rains; obtaining a seawater color value with a foam effect of the current grid point, obtaining a final color value of the sea level position of the grid point, and realizing a foam effect of a shore dynamic impact; and obtaining an underwater scene color value of the current grid point after etching, obtaining a final color value of the underwater scene of the current grid point, and realizing an underwater dynamic etching effect and an underwater distortion effect with light attenuation.

The invention discloses a switched reluctance linear motor magnetic circuit modeling method especially suitable for switched reluctance linear motors of various phase number structures and belongs to the field of switched reluctance linear motor modeling and controlling. The switched reluctance linear motor magnetic circuit modeling method is characterized in that all calculation formulas of reluctance components in six magnetic circuits at a rotor position xu where the central line of a rotor groove is aligned at the central line of a stator tooth, at a rotor position x0 where the front edge of a rotor tooth is aligned at the front edge of the stator tooth, at a rotor position x1/4 where the rotor tooth and the stator tooth are overlapped by one four of width of the stator tooth, at a rotor position x1/2 where the rotor tooth and the stator tooth are overlapped by one half of the width of the stator tooth, at a rotor position x3/4 where the rotor tooth and the stator tooth are overlapped by three fourths of the width of the stator tooth and at a rotor position xa where the central line of the rotor tooth is aligned at the central line of the stator tooth are combined to form a magnetic circuit model of a switched reluctance linear motor. A motor electric magnetic field finite element method does not need to be adopted to calculate magnetic characteristics of the motor, the method is suitable for the switched reluctance linear motors of various phase number structures, quick design, realtime simulation and realtime control of a switched reluctance linear motor system can be realized, and the method has good engineering application value.

The invention provides a test method and system for a micro grid energy management system. The test method comprises the steps that a micro grid model is built on an RT-LAB real-time simulation host;the micro grid model comprises at least one renewable energy power supply device model, at least one energy storage device model and a micro grid communication interface; the renewable energy power supply device model and the energy storage device model are connected with the micro grid communication interface respectively; the simulation host compiles and downloads the micro grid model to a real-time target machine; the real-time target machine runs the micro grid model, acquires the status information of a micro grid in real time, and uploads the information to the simulation host; the status information of the micro grid is uploaded to the micro grid energy management system through the micro grid communication interface; a dispatch instruction sent by the micro grid energy management system is received through the micro grid communication interface; and the dispatch instruction is issued to the real-time target machine for execution. The test method and system have the advantages of low cost, convenient realization, comprehensive problem testing and good real-time performance.

The invention provides a partitioned simulation method for a nuclear power unit condenser. The method comprises the steps of (1), partitioning simulation objects, wherein the simulation objects comprise general condensers and shared condensers, and partitioning comprises uniform partitioning and non-uniform partitioning; (2), inputting structure sizes, physical properties, boundary parameters and calculation initial values of the condensers; (3), carrying out thermal-transfer calculation on one-to-one correspondence partitions at a shell side and a pipe side; (4), carrying out thermal parameter calculation; and (5), outputting a simulation result. Compared with an actual device, the simulation model established by the method has the advantages that the output data under steady state and transient state condition can satisfy a device simulation precision demand, and the operation characteristic research can be carried out through utilization of the simulation method.

The invention relates to a lighting device for virtual celestial illumination scenes. The lighting device at least comprises a control module and a light source module. The lighting device is characterized in that according to celestial illumination data corresponding to user-specified location information and/or time information, a client acquires lighting parameters corresponding to the celestial illumination data and transmits the lighting parameters to the control module, the control module is enabled to control lighting state of the light source module according to the lighting parameters, and an illumination scene where celestial bodies are located at specified positions and/or time is virtualized. The lighting device has the advantages that the celestial illumination scene can be controlled and simulated remotely in real time, the needs of various places for lighting are met, the simulated celestial illumination scene has natural light and feels more comfortable, and time reminding can be achieved without affecting users' attention.

The invention provides an intelligent well drilling system and method and belongs to the field of petroleum and natural gas well-drilling. The intelligent well drilling system comprises a ground system, a downhole system and an intelligent well drilling control platform. The ground system comprises a coiled tubing vehicle set, a coiled tubing control platform, a coiled tubing roller, a lower sleeve derrick, an injection head, a rotating control head and matching blowout-prevention equipment. The coiled tubing control platform and the coiled tubing roller are arranged on the coiled tubing vehicle set, and the lower sleeve derrick is arranged on the upper portion of a wellhead. The injection head, the rotating control head and the matching blowout-prevention equipment are sequentially connected from top to bottom and then arranged at the wellhead. The downhole system comprises coiled tubing with a cable, a wet joint and a downhole intelligent pipe string. One end of the coiled tubing with the cable is wound around the coiled tubing roller, and the other end of the coiled tubing with the cable sequentially penetrates through the injection head, the rotating control head and the matching blowout-prevention equipment and then enters the wellhead to be connected with the downhole intelligent pipe string through the wet joint.

A real-time simulation method of elastic materials based on an exemplar in a Laplace-Beltrami shape space includes the steps that by means of a Laplace-Beltrami operator and a linear finite element discretization method, characteristic functions and characteristic values of a simulation object and the exemplar on a three-dimensional tetrahedral mesh are calculated; the characteristic function of the exemplar and the characteristic function of the simulation object are subjected to registration; the position of the simulation object is projected in the Laplace-Beltrami shape space, and the shape of a target on an exemplar fashion is solved through non-linear shape interpolation; a final deformation result under an Euclidean space is obtained by building a local coordinate system on each vertex at current moment and adding shape details; a deformed object simulation kinetic equation under a non-inertial system is solved by means of a dimensionality reduction subspace built on a modal substrate, and displacement under a dimensionality reduction space at a new moment is obtained; the displacement under the dimensionality reduction space is projected to obtain global displacement by means of a projection matrix calculated in the preprocessing process under global and dimensionality reduction spaces, and a deformation result is drawn.

The invention discloses a nuclear power plant alarm simulation and diagnostic system and method, and belongs to the field of nuclear power plant operation and management. The nuclear power plant alarm simulation and diagnostic system includes a unit DCS, a data analysis station, an alarm storage server, a full scope simulator system and an alarm diagnostic analysis station. The data analysis station is used for determining alarm signals to be simulated, alarm source signals to be simulated and alarm condition I/O signals. The alarm storage server is used for storing, in groups, real-time values of the alarm source signals to be simulated and the alarm condition I/O signals. The full scope simulator system is used for analog simulation to generate a simulation value of the alarm condition I/O signals. The alarm diagnostic analysis station is used for deviation comparison to generate an alarm simulation analysis report. The invention achieves real-time simulation and diagnostic analysis of the alarm signals, provides guidance for the processing of the alarm signals, and enhances the operation and management of a nuclear power plant. Moreover, the invention extends the functionality of the full scope simulator system and avoids the waste of resources.

An embodiment of the invention relates to the field of flexible direct current transmission emulation techniques, and discloses an emulation platform of an MMC system based on an FPGA. The emulation platform includes: a personal computer (PC), a CPU emulator, an FPGA emulator and an external control or protection device of an MMC system. The PC, the CPU emulator and the FPGA emulator are connectedin turn. The FPGA emulator is also connected communicatively to the external control or protection device. The PC is used for constructing a system emulation model of the MMC system and for transferring the system emulation model to the CPU emulator and the FPGA emulator respectively. The system emulation model includes all the primary equipment emulation models, converter valve emulation modelsand pole control or station control emulation models of at least two converter stations of the MMC system. The PC is also used for controlling the CPU emulator to run the pole control or station control emulation models, and for controlling the FPGA emulator to run all the equipment emulation models and the converter valve simulation models in real time to implement hardware-in-the-loop testing ofthe external control or protection device. The emulation platform of the invention can realize real-time emulation and hardware-in-the-loop testing of traveling wave protection.

The invention relates to an equivalent model-based simulation method and device of an energy storage system. The method comprises the steps of acquiring dispatching demand and power generation data ofa power grid, and calculating a charge state of a battery pack in each energy storage unit at a next moment; and substituting the dispatching demand, the power generation data of the power grid and the charge state of the battery pack in each energy storage unit into an equivalent model which is built in advance for calculation, and obtaining running data of an energy storage sub-system until simulation is ended. The equivalent energy storage units are combined by the equivalent model, the external characteristic of an energy storage power station is enabled to be approximate to a detailed model as well as the complexity of the simulation model in the energy storage system is reduced, so that the simulation effectiveness is ensured.

The invention provides a hair simulation method and system in the field of computer graphics, and the method comprises the following steps: S10, setting an initial state of a hair style, and dividingthe hair style into a fixed area and a motion area ; S20, generating a mapping skeleton of the hair based on the hair trend of the fixed area and the hair trend of the motion area; and S30, setting motion parameters of the hair, and simulating the motion of the hair by utilizing the motion parameters and the mapping skeleton. The invention has the advantage that real-time simulation of motion of complex hair styles is realized.

The invention provides a cloth real-time simulation method for virtual fitting, which belongs to the technical field of virtual fitting. The problem solved by the invention is that a cloth fast simulation method based on a GPU is proposed for the problem that the simulation speed of the existing 3D virtual fitting is slow. The core part of a main algorithm of the cloth real-time simulation methodis to rapidly construct and update a bounding volume hierarchy (BVH) by maximally utilizing the parallelism of the GPU, and a collision detection and processing method for corresponding large step integration is proposed. According to the cloth real-time simulation method, an entire cloth simulation system is arranged on the GPU, and a corresponding stream processing algorithm is proposed. Compared with some existing methods at present, the cloth real-time simulation method provided by the invention can realize cloth simulation more rapidly on the basis of ensuring high realness degree of cloth simulation, realizes the real-time simulation of clothing in a virtual fitting application, and is suitable for other cloth simulation fields.

The invention discloses a real-time simulation model and a real-time simulation device for power grid and heat supply network combination in an energy internet. The real-time simulation device comprises a fixing plate and a box body, wherein both sides of the bottom part of the fixing plate are fixedly connected with supporting legs, the top part of the fixing plate is fixedly connected with an upper computer, the top part of the upper computer is fixedly connected with a display, and the upper computer establishes a heat supply network and power grid coupled simulation model based on a simulink graphical environment. The real-time simulation model and the real-time simulation device are used for constructing a real-time simulation platform for combined operation and control of a heat supply network and a power grid in an integrated energy system, the power grid and heat supply network models are established by adopting the simulink in the upper computer, the power grid and heat supply network models are compiled and downloaded to two target machines for operation, the upper computer is connected with the two target machines with different step lengths by means of an Ethernet switch, and the two target machines (simulators) exchange real-time simulation variables so as to simulate the coupling effect between the power grid and the heat supply network.

The invention discloses a garment layering method, comprising the following steps of a) piece division: building a plurality of pieces of grid garment piece models; b) layering: layering a plurality of pieces of garment piece models from inside to outside according to the body closeness relationship between a garment sewn by a plurality of pieces of garment piece models and a grid wearing model; c) sewing: sewing a plurality of pieces of garment piece models into a garment model, and wearing the garment model on the wearing model according to the body closeness relationship between the garment model and the wearing model under the actions of sewing pull force and collision. The invention further discloses a garment layering system which adopts the garment layering method, a layered garment simulation method and a layered garment simulation system. According to the garment layering method, the garment layering system, the layered garment simulation method and the layered garment simulation system, the situation that the garment is balanced under the actions of various forces is simulated; a pre-movement position of a current point is obtained after a period of time T. The collision is simulated, and an anticipated speed is obtained through an anticipated movement position and a position at the last time point. The wearing effect of layered garment pieces is fast simulated in real time by means of directly changing the position at the last time point and the anticipant speed in the process of handing the collision.

The invention discloses a display system comprehensive verification system for situation awareness enhancement, and the system comprises flight simulation software, visual simulation software, air traffic control operation simulation software, and comprehensive verification platform test software. The comprehensive verification platform test software compiles flight simulation data, avionics system simulation data and non-avionics system simulation data sent by the flight simulation software as well as air traffic control operation data and scene related operation data sent by the air traffic control operation simulation software into excitation data and outputs the excitation data to the display system, and the display system draws the display picture, and distributes the simulation scene output by the scene simulation software to the required display. The method is a comprehensive verification method with situation awareness enhancement, air traffic control operation, visual simulation, flight scene setting and new display application.

The present invention relates to the technical field of industrial robot reducers, especially to a novel industrial robot RV reducer performance test method. The method comprises the steps of: (1) instrument zero setting; (2) forward loading to a rated torque; (3) forward unloading to a zero load; (4) backward loading to a rated torque; and (5) backward unloading to a zero load. The reducer revolution transmission precision error measure method is simple in calculation, few in measurement parameter and simple to obtain revolution transmission errors; and moreover, a test bed is high in measurement precision, simple in structure and easy to operate.

The invention discloses a two-dimensional magnetic circuit modeling method of a single-phase cylindrical linear switched reluctance motor. All calculation formulas of each reluctance component in fivemagnetic circuits combine to form the magnetic circuit model of the single-phase cylindrical linear switched reluctance motor, wherein the five magnetic circuits include the rotor position x wherethe central line of a rotor groove is aligned with that of a stator tooth of the cylindrical linear switched reluctance motor, the rotor position w<4>/4 where the overlapping part of a rotor tooth and the stator tooth occupies a quarter of the width of the stator tooth, the rotor position w<4>/2 where the overlapping part of the rotor tooth and the stator tooth occupies a half of the width of thestator tooth, the rotor position 3*w<4>/4 where the overlapping part of the rotor tooth and the stator tooth occupies three quarters of the width of the stator tooth and the rotor position where thecentral line of the rotor tooth is aligned with that of the stator tooth; it is unnecessary to adopt a motor electromagnetic field finite element method to calculate the magnetic property of the motor, calculation is fast, rapid design, real-time simulation and real-time control of the single-phase cylindrical linear switched reluctance motor system can be achieved, and the method has good engineering application value.