53results about How to "Meet the needs of simulation" patented technology

The method relates to a soft tissue deformation simulation method. The soft tissue deformation simulation method includes the following steps: a biomechanics model of soft tissue is built, and mass points in the biomechanics model are initialized; force feedback equipment exerts action force on the soft tissue to carry out collision detection; motion state information is calculated in an improved Euler algorithm; the state of each time step of the model is output to a display screen, and the deformation process of the soft tissue is displayed in a dynamic mode; feedback force is calculated, and touch feedback is output. By means of the steps, real-time performance, precision and smoothness of the feedback force in virtual operation simulation can be effectively achieved, precision and real-time performance of soft tissue deformation simulation are improved, and accordingly requirements of virtual operation simulation are met.

The invention provides a method for accelerating a lattice-Boltzmann by utilizing graphic processing units (GPUs), and relates to a GPU at a host port and a GPU at an equipment port. The method comprises the steps that the host port gives parameters such as computational domains, the reference length, the freestream velocity, the density, reynolds numbers and the like according to physical problems, and divides thread numbers of a design kernel according to a grid; and the equipment host calculates equilibrium state distribution functions of all lattice points in each direction through the macroscopic parameters (the density, the speed, the reynolds numbers, the viscosity coefficient, and the like), uses the equilibrium state distribution functions as initial fields of the calculation, parallelly solves a discrete equation and processes boundaries, and returns a result finally obtained through iteration to the host port. According to the method, the migration and the collision in the lattice-Boltzmann method are calculated by utilizing the rapid calculation characteristic of the GPU at the equipment port, and the iteration process of the lattice-Boltzmann method is accelerated through coordination operation of the GPU at the host port and the GPU at the equipment port.

A satellite data receiving simulation analysis platform comprises a component development module, a model assembly module, a scenario edition module, a management control module, a simulation running engine, a two-dimensional scene module, a three-dimensional vision module, a service flow show module, a transmission link analysis module and an analysis and evaluation module. According to the satellite data receiving simulation analysis platform, the working condition of a satellite data receiving and transmission task can be simulated, simulation deduction and multidimensional show can be performed on the receiving process according to time, the task and resources, the specific use conditions of all devices of a ground station and the interactive relationship between the devices and other external systems can be shown, and analysis validation can be performed on the feasibility of a dispatching planning scheme according to resource capacity and constraint conditions. All entity models in a ground receiving system are built based on modularization, so that the purposes of model reuse and model data separation are achieved, and the expansibility and adaptability of the simulation analysis platform are improved; meanwhile, a multithreading discrete event is adopted for the simulation engine for driving, so that the simulation running efficiency of the platform is improved.

The invention discloses a method for measuring a large deformation flow stress curve of a metal plate in the field of metal plate volume forming engineering, which comprises the following steps: taking the metal plate, and performing initial stretching test to acquire a real stress-strain curve; acquiring an equivalent strain interval of a subsequent rolling process; diving the equivalent strain interval into n equal parts to acquire the thickness of the plate after each theoretical rolling; taking n blocks of the metal plate, and cold-rolling and machining each block of the metal plate according to the thickness of the plate after theoretical rolling to acquire n actual thickness and then acquire each actual rolling equivalent strain; performing re-stretching test for the cold-rolled n metal plate blocks to acquire n subsequent flow stresses and n subsequent real strains; and further acquiring n data points to acquire the large deformation flow stress curve of the metal plate. The method of the invention can provide accurate material performance parameters for the numerical simulation in a plate volume forming process, and provide basis for engineering personnel to select an extrapolation model.

The invention discloses a novel linear electric loading system. The novel linear electric loading system comprises a base plate, base plate bosses, bumper block installing tables, bumper blocks, rubber blocks, guide rails, a slide platform, a connecting block, a magnetic railing ruler, drag chain installing angle iron, a force sensor, drag chains, a linear motor, a threaded connecting rod, a linear steering engine, a supporting plate and fixing screws. According to the novel linear electric loading system, aluminum alloy platforms are adopted in the linear motor, the guide rails and the like, and therefore dynamic performance of the system can be improved beneficially. Compared with a traditional loading structure that a servo motor is installed with a ball screw, the novel linear electric loading system has the advantages that the slide platform is adopted, a loading motor and the steering engine are connected through threaded rods, and the shortcomings that the traditional loading structure is long in reversed time and poor in dynamic performance are effectively overcome. Compared with a traditional connecting method using lug rings, the method of connecting the loading motor and the electric steering engine through the threaded rods avoids connecting gaps and improves loading accuracy. When the loading system breaks down, the phenomenon of rotation blocking of the steering engine can be prevented, the steering engine can not be damaged, and the effect of safety protection is achieved.

The invention provides a method for utilizing a microwave integrated circuit (MIC) to rapidly achieve lattice Boltzmann parallel acceleration. The method comprises the steps of enabling a central processing unit (CPU) to set parameters such as a computational domain, a reference length, an inflow velocity, density and Reynolds numbers according to physical problems and design thread counts of an inner core according to nuclear numbers of an MIC card; enabling an MIC end to calculate equilibrium state distribution functions of all lattice points in various directions through the macroscopic parameters (the density, the speed, the Reynolds numbers and a coefficient of viscosity and the like) so as to enable the equilibrium state distribution functions to serve as a computational initial field, performing parallel solving of a discrete equation and a processing edge, and enabling results obtained by final iteration to be passed back to a CPU end. The characteristic of rapid calculation of an MICMIC end is utilized to participate in calculation of migration and collision in lattice-Boltzmann, and the iterative process of the lattice-Boltzmann is accelerated by coordinated operation of the CPUCPU end and the MICMIC end.

The invention discloses a large eddy simulation system and a large eddy simulation method for realizing cooperative computing based on a latticed-Boltzmann theory. The system adopts the technical scheme that a master process module broadcasts input data to other process modules in the system and outputs calculation results of all nodes after all the MIC (many integrated core) process modules and all the CPU (central processing unit) process modules finish all computing tasks; the MIC process modules unload the input data to corresponding MICs for computing and perform data communication with the MIC process modules or CPU process modules of the adjacent nodes, and then the next iteration is executed; the CPU process modules control the cooperative computing of the node and start a corresponding thread for each CPU kernel according to the number of kernels of CPUs so as to compute part of distributed data; meanwhile, data communication with the MIC process modules or CPU process modules of the adjacent nodes is executed, and the next iteration is executed. The large eddy simulation system and the large eddy simulation method implement cooperative computing under multiple nodes by using the advantage of reducing the power consumption of the CPUs and the MICs, so that implementation is simple, and the cost is low.

The invention discloses a Beidou B1 frequency point intermediate frequency signal simulation method. A simulation system mainly realizes the satellite signal simulation with in the arbitrarily given simulation time, the arbitrarily given simulated flight track and the arbitrarily given carrier-to-noise ratio. According to the method, the satellite signal transmission delay in the flight track is obtained through carrier flight track and satellite ephemeris resolving, through the delay and the influence of an ionized layer and a convection layer on the delay, ranging codes, navigation messages and carrier waves of corresponding satellites are generated, signals of the multiple satellites are synthesized into one path of signals, then, noise is added, and in addition, filtering, quantization and signal storage are carried out. The influence of the transmission delay calculation quantity on the consumed simulation time is considered, the flight track delay with the period being 0.2ms is calculated in advance, the transmission delay of each sampling point is calculated through interpolation, the precision is ensured, meanwhile, the data storage is greatly saved, and the simulation efficiency is improved.

The invention relates to a method for simulating traffic behaviors of pedestrians in the technical field of traffic simulation, and discloses a method for avoiding obstacles based on blocking corners in the pedestrian simulation. The blocking corners of the obstacles generated on the current pedestrians are established after all static obstacles and other pedestrians are scanned in the collision avoiding range; and if the target direction of the current pedestrian is not comprised by any blocking corner, the pedestrian walks along the direction, otherwise, the pedestrian needs to pass round a blocking area formed by the blocking corners in the target direction. The method provides the concept of the blocking corners; the blocking corners of the obstacles on the current pedestrian are established, and further the blocking area round which the pedestrian needs to move is determined; meanwhile, a path of moving round the static obstacles and the pedestrians in the same direction is selected according to the shortest path principle and the collision with the pedestrians in the opposite directions is avoided by reducing the priority of one side of each blocking corner. No complex parameter calibration is needed in the process; and the collision avoiding range and the moving-round rule can be freely set. Therefore, the needs of different simulation with different purposes are met.

A mechanical multi-frame RF/infrared composite interference semi-physical simulation system includes a microwave anechoic chamber, a three-axle table, a table control system, a RF interference simulator, an infrared interference simulator, a mechanical multi-frame moving system, a servo system, and an integral real-time simulation control system. The three-axle table, the table control system, the RF interference simulator, the infrared interference simulator, and the mechanical multi-frame moving system are arranged inside the microwave anechoic chamber, and the integral real-time simulation control system is arranged outside the microwave anechoic chamber. The RF interference simulator and the infrared interference simulator are mounted on a moving platform of the mechanical multi-frame moving system. The integral real-time simulation control system is composed of a multi-node real-time computer network including a master control computer, an acquisition computer, a RF interference control system, an infrared interference control system, a real-time communication network, a simulative master control system and a monitoring system. The real-time communication network is built up by the utilization of reflective memory networking, and information transmission and real-time control among devices of the simulation system are realized.

The invention provides simulation equipment and a method for describing the simulation equipment attribute of embedded equipment. The method comprises the following steps of: constructing an equipment layer node corresponding to the embedded equipment; constructing a plurality of state layer nodes below the equipment layer node, wherein each state layer node respectively describes one state attribute of the embedded equipment; constructing a plurality of view layer nodes below each state layer node, wherein each view layer node respectively describes the attribute of an appearance view of the embedded equipment in a corresponding state; and constructing a plurality of widget layer nodes below each view layer node, wherein each widget layer node respectively describes the attribute of a visible or an invisible widget of the embedded equipment under the corresponding appearance view. According to the invention, the attribute of any embedded equipment can be described, and a user can freely design any multiple sets of brand-new simulation equipment without modifying a simulator program.

The invention proposes a large dynamic energy infrared target simulation system. The system is composed of a radiation source module, an optical system, a control module and supporting devices. The radiation source module includes a black body radiation source, a black body controller, a condenser lens, a light barrier, an attenuation film group and a light barrier group. The attenuator group includes attenuator A and attenuator B. The diaphragm group includes diaphragm A and diaphragm B. The optical system includes a relay optical lens and a collimating optical lens. The control module includes industrial computer (with reflective memory card and motion control card), I/O card, motor driver, servo motor, control cable and control software. The control module can control the change of the shape, size and energy of the target. The spectral characteristics of the radiation source are adjusted by adjusting the temperature of the black body through the black body controller.

A simulation system and a simulation method are provided. The simulation system includes: a user interface module configured to receive an external input; a control module configured to control a behavior described in a preset simulation logic program based on the external input, wherein in the preset simulation logic program, the state in a simulated item and the behavior of driving the state change are described in a code form, when the external input includes a learnable parameter, the control module acquires an optimization value of the learnable parameter from an optimization module, andperforms a step of controlling the behavior described in the preset simulation logic program based on the external input by taking the optimization value as a value of the learnable parameter; a simulation module configured to run the preset simulation logic program in response to the control of the control module; and an optimization module configured to perform optimization learning on the valueof the learnable parameter based on the simulation result data output by the simulation module.

The invention provides a test device and a test method for a long-distance water diversion channel circulating water flow freezing model. The test device comprises a U-shaped flow channel, a water tank, a water pump, and a variable frequency control cabinet. The U-shaped flow channel comprises two sections of straight water conveyance flow channels and a section of 180 DEG arc-shaped water conveyance flow channel. According to the test device and the test method for the long-distance water diversion channel circulating water flow freezing model, a circulating flowing water flow is formed in the U-shaped flow channel by the water tank and the water pump; the water flow speed can be adjusted by the variable frequency control cabinet to guarantee the running stability of the water flow; and long-distance water diversion channel water conveying process in winter and cold environment can be simulated, and a model test platform is provided for researching the freezing characteristic law andthe ice melting mechanism of long-distance channel engineering under different water delivery flow rates.

The invention discloses an independent sound insulation room. The independent sound insulation room comprises a first multimedia screen, a framework layer and a second multimedia screen, the multimedia screens are mounted on the inner and outer surfaces of the framework layer, wherein the framework layer comprises keel frame bodies, a framework body sound insulation layer between the keel frame bodies, framework surface sound insulation layers inside and outside the keel frame bodies, and flame-retardant layers covering the surfaces of the framework surface sound insulation layers. According to the independent sound insulation room, a sound absorption plate cooperates with the keel frame bodies, so that the framework strength and the sound absorption effect are improved, the contradictionbetween sound insulation quality control and sound insulation room weight and volume control is solved; sound absorption hole channels formed by metal films with protrusions are formed in the sound absorption plate, sound energy can be consumed in the two modes of air vibration and metal film wall friction or metal film vibration, meanwhile, resonance is formed between the metal films, the metal film composition is optimized, and the sound energy consumption efficiency is further improved; and excellent sound absorption effects are achieved inside and outside the sound insulation room, and theindependent sound insulation room is suitable for the situation that the sound insulation requirement is relatively high or the multimedia screens are arranged inside and outside.