36results about How to "Meet the simulation requirements" patented technology

The invention discloses a thermal vacuum test external heat flux simulation method of a high-orbit remote sensing satellite platform, which comprises the following steps of placing an infrared cage onone side of the heat dissipation surface of the star to be measured through a rotating mechanism, wherein the infrared cage adopts a heating belt material of nickel-cadmium alloy, the heating belt width is 8mm, the spacing is 12mm, the thickness is 0.1 mm, the heating belt resistivity is 1.02 E. 06 Omega . m, sprayed black on both sides of the heating zone; The infrared cage is rotated along theaxial direction by the rotating mechanism, and the external heat flux is calibrated by the method of constant heat flux density. The invention can meet the external heat flux simulation requirements of extremely low temperature and high temperature of the satellite in orbit. High simulation accuracy; So that that shield effect is small.

The invention discloses a coralline calcarenite and coralline calcirudite similar material, a preparation method therefor and an application of the coralline calcarenite and coralline calcirudite similar material. The similar material comprises the ingredients: aggregates: barite powder, quartz sand and calcareous sand; and cementing materials: cement and high-strength gypsum. According to the similar material and the preparation method therefor, provided by the invention, the brittleness of the material is improved by selecting the barite powder, the quartz sand and the high-strength gypsum,and the porosity of the material is improved due to the calcareous sand; and the materials are shaken up during preparation, so that the improvement on the strength of the material and exertion of brittle characteristic of the high-strength gypsum are facilitated. Normal-temperature curing is employed after preparation is complete, the setting time is short, characteristics of coralline calcarenite and coralline calcirudite are successfully simulated, the production process is simple, the cost is low, the performance is stable, and technical requirements of three-dimensional physical model tests are met.

The invention provides a modeling method suitable for VSC-HVDC system. The modeling method suitable for the VSC-HVDC system comprises the steps: step 1: average simplifying rectification loop; step 2: average simplifying inverter loop; and step 3: average simplifying direct current transmission loop. The invention further provides a relevant converter and a synchronous prototype. The rectification loop, direct current transmission loop and inverter loop of the synchronous prototype use an average value model to form a whole converter average value model. The modeling method suitable for the VSC-HVDC system is suitable for the grid-connected wind farm, and can satisfy most simulation requests under the situation without involving the converter control method.

The invention discloses a finite element human body modeling method oriented to human body communications, belonging to the technical field of human body communications. The method comprises the following steps: (1) performing geometrical abstraction to every part of a human body according to the shape properties of every part of the human body; (2) defining an inner geometrical structure of everypart of the human body; (3) setting electromagnetic property parameters of stratum mediums in every part of the human body; (4) connecting every part of the human body to form a completed finite element model of human body. The finite element human body modeling method oriented to human body communications provided in the invention can form a finite element human body software model with the geometrical property and electromagnetic property which are similar to an authentic human body, and the finite element human body software model has significance to the study and application of the humanbody communication technology.

The invention discloses a dual-chord width earth simulator. A first earth simulator consists of a first cold plate, a second cold plate and a first hot plate. A second earth simulator consists of a third cold plate, a fourth cold plate and a second hot plate. The first hot plate is a semicircular sheet embedded into a pedestal, and has an upward opening. A motor driving mechanism passes through the central point of the semicircle of the first hot plate to serve as a main shaft of the first earth simulator, and can control the rotation of the first and second cold plates to shade the outer surface of the semicircle of the first hot plate respectively. The second hot plate is semi-cylindrical and embedded into the pedestal, and has the upward opening. A driving shaft of the motor driving mechanism is overlapped with the axis of the semi-cylinder. The motor driving mechanism can control the rotation of the third and fourth cold plates to shade the inner surface of the semi-cylinder of the second hot plate to simulate variations of the chord width of the earth respectively. The dual-chord width earth simulator can meet the scanning requirements of a biconical earth sensor, and simultaneously provides a measurement target for two paths of infrared channels.

The invention discloses a distributed semi-physical network simulation system and a controlling method of semi-physical port thereof, comprising a network physical system and a network simulation system, wherein the network physical system comprises a plurality of network nodes and communication connecting equipment thereof based on military communication network; the network simulation system comprises a plurality of simulative PC machines operated with network simulative software, each simulative PC machine in the network simulative system has a semi-physical port; under the condition that the semi-physical port finishes the functions of information analysis, transmission and time management between the network simulation systems and between the network simulation system and the networkphysical system without changing any arrangement of simulative and physical system, the different simulative applications such as simulation and physical are connected with each other, each simulative PC machine has the semi-physical port, and the expandability of the system is strong.

The invention discloses a closed-loop simulation method for laser three-dimensional forming. The simulation method is different from the usual thermal-mechanical coupling model. In the whole simulation process, a constant laser power is simply used, but based on the process characteristics of laser three-dimensional forming, it is continuously and dynamically adjusted. The laser power of the next melt pool, compared with the existing thermal-mechanical coupling model of laser stereoforming, the finite element optimization modeling method based on temperature closed-loop control is more in line with the objective laws of the actual forming process. An optimized model that is more in line with the real processing process must be able to more accurately reveal the thermal-force field evolution law and coupling mechanism of laser three-dimensional forming, and provide scientific guidelines for mitigating the stress and deformation of laser three-dimensional forming.