64results about How to "Enable accurate simulation" patented technology

The invention discloses a flight stimulator system with persistent overload simulation capability. The flight stimulator system comprises a flight stimulator and an overload component model, wherein the overload component model is stored in a PC (Personal Computer); the flight stimulator comprises a nacelle, a rolling frame, a spiral arm, a weight balancing block, a base assembly, a first drive assembly, a second drive assembly, a third drive assembly and a fourth drive assembly, wherein the spiral arm, the nacelle and the rolling frame form a moving manned centrifugal platform; the moving manned centrifugal platform is driven by a motor in the base assembly and is also driven by the first drive assembly, the second drive assembly, the third drive assembly and the fourth drive assembly to realize persistent and non-instantaneous overload. A control method of the flight stimulator system comprises the following steps of: operating the flight parameters output by each device in the cockpit by a trainee; then, processing the flight parameters through the overload component model to as to obtain control parameters required by three-axial overload; and finally, accurately simulating three-axial persistent overload on the trainee by controlling the angular velocity of the spiral arm and the roll angle and the pitch angle of the nacelle.

The invention discloses an online visual free face surgery method and system for simulating effects of a plastic surgery. The method includes the following steps: acquiring face data of a user; generating an original face 3D simulation model of the user; returning face 3D model parameters; visualizing a face 3D model; the user carrying out free face surgery online; generating a plastic surgery effect simulation evaluation report. The system for realizing the method includes a client terminal and a server. The client terminal includes a photo photographing apparatus and an online face surgery device. The server includes a server. According to the invention, the method and the system can simulate the effects of a plastic surgery in a precise manner and is visual; the user can adjust ideal effect of the plastic surge online and can communicate with a doctor easily; the 3D face model is generated and feasible adjustment can be performed, which act as reference for the doctor in the implementation of the plastic surgery; the method and the system can be a contract content in the plastic surgery contract, protect the rights and interests of both parties, and avoid ordeal and risks to the user by repetitive surgeries.

The invention provides an excitation inrush current simulation method and device for an ultra-high voltage transformer under a condition of no-load closing. The excitation inrush current simulation method comprises the following steps: on the basis of the transitional area between the linear area and the non-linear area of the non-hysteresis curve, non-hysteresis magnetization intensity indicated by Langvin function is corrected; the corrected non-hysteresis magnetization intensity is utilized to establish a J-A magnetic hysteresis model; the parameters of the J-A magnetic hysteresis model are recognized; an analysis is conducted on the ultra-high voltage transformer and the differential magnetic susceptibility equation is determined; through the J-A magnetic hysteresis model and the differential magnetic susceptibility equation, the excitation inrush current of the ultra-high voltage transformer under the empty charging condition is determined. The excitation inrush current simulation method and device for the ultra-high voltage transformer under the condition of non-load losing correct the non-hysteresis magnetization intensity, enable the transitional area between the linear area and saturation area of the non-hysteresis curve to be closer to a true value and accurately simulate the magnetization characteristics of the transformer; moreover, the special construction of the ultra-high voltage transformer is considered and the excitation inrush current of the ultra-high voltage transformer under the condition of empty charging is simulated. Errors in the simulation are reduced.

The invention relates to a testing device for simulating the equipment corrosion of a continuous distillation industrial device. The testing device comprises a continuous distillation system, a pressure control system and a corrosion sample system, wherein the top interface of a multi-mouth flask is connected with the bottom of a main reactor; the top interface of the main reactor is connected with the bottom of a main condenser; the top of the main condenser is connected with a non-condensable gas receiving tank, a cold trap, a gas buffering tank and an exhaust system through connecting pipes respectively, and is connected to a vacuum pump through the cold trap; and the corrosion sample system comprises a sample hanging device for placing samples into a steam phase and a liquid phase. A skillful reflow design is adopted in the invention, so that a condensed low-boiling-point liquid does not flow through the high-temperature main reactor, so that re-vaporization before reflowing to the bottom of the multi-mouth flask is avoided. Under the action of a reflow bypass, condensed low-boiling-point components and high-boiling-point components left at the bottom of the multi-mouth flask are fully mixed forcedly, and the distillation process is started once again, so that accurate simulation of continuous distillation is realized.

The invention discloses a flat board type changeable simulation road face testing device including four road face simulation mechanism in contact with four wheels. The road face simulation mechanism includes a drive chain wheel and a driven chain wheel; chain links connected in a head-to-tail manner so as to form a loop chain engaged with the drive chain wheel and the driven chain wheel; a T-shaped channel steel board connected with the chain links fixedly and provided with a through T-shaped groove; a T-shaped block fitting with the T-shaped groove so as to enable the T-shaped block to embed into the T-shaped groove in a dismountable manner; and bosses arranged at the top end of the T-shaped block and in contact with wheels so as to realize road face excitation to an automobile, wherein the chain links between the drive chain wheel and the driven chain wheel are kept horizontal. The device provided by the invention is simple in structure and reasonable in design. Different road faces can be simulated through changing the shapes and distribution of the bosses.

Provided is a Matlab / Simulink based power cable partial discharge signal propagation simulation method. The method comprises the following steps: 1) establishing a power cable distributed parameter model suitable for research on high-frequency partial discharge signal propagation properties; 2) by analysis on power cable partial discharge signal properties, establishing a simulation partial discharge signal; 3) establishing a simulation model of partial discharge wave propagation properties in a high-voltage power cable; and 4) timely outputting a simulation result of the simulation model. The method has the beneficial effects of realizing accurate stimulation of the partial discharge signal propagation properties in the power cable; and having excellent versatility, and timely outputting the simulation result of the simulation model, thereby effectively improving positioning precision of test on a partial discharge reflected wave, and providing a certain foundation for further research on detection of power cable partial discharge.

The invention discloses a method for imitating luminous environment. The method comprises the following steps: respectively confirming the light intensity of the light which influences the growth of crops in the spectrum of the actual luminous environment of the crops, and according to the corresponding relationship between the output power of a lamp and the light intensity, adjusting the output power of the lamp which can emit the light influencing the growth of crops. According to the method for imitating luminous environment provided by the invention, the lamp which can emit the light influencing the growth of crops is used as a light source, the light intensity of the light which influences the growth of crops is confirmed according to the spectrum of the actual luminous environment of the crops, and the output power of the lamp is adjusted based on the light intensity, thereby ensuring that the intensity of the light emitted by the lamp is accordant with the intensity of the light in the actual luminous environment and realizing the accurate imitation for the luminous environment. The invention also discloses a system for imitating luminous environment.

The invention discloses a three-dimensional physical simulation experiment method of small-sized self-weight frame-type loading. The method includes the following steps that firstly, front and rear side chair rails are installed on the front side and the rear side of a main frame device to form a similar material filling space according to a geological object to be simulated; secondly, a geometric analogue is filled into the similar material filling space with the height after the front and rear side chair rails are installed as the filling height for the first time, geometric analogue filling is carried out for the second time, the third time and the like according to the mode, a model is subject to air drying, and the front and rear side chair rails are disassembled; thirdly, a self-weight frame-type loading region is adjusted, so that a loading cross beam, a friction rubber plate and the geometric analogues make contact with one another well, a self-weight frame-type loading device freely slides up and down, and the loading height is equal to or smaller than the height of the front and rear side chair rails; fourthly, the model is subject to construction and excavation, and data collecting and recording are carried out through a computer system to complete an experiment. The method has the advantages that steps are reasonable and easy to execute. Due to the adoption of the method, underground engineering environments are made to precisely reappear, and data loading accuracy and experiment safety are improved.

The invention provides a method for realizing digital-analog hybrid simulation of a power system of a thermal power plant. The method comprises the following steps: (1) a digital model power generator in a power system simulation platform sends a simulation amount to the power system of the thermal power plant; and (2) the power system of the thermal power plant sends mechanical power of a steam turbine to the digital model power generator in the power system simulation platform so as to realize real-time closed-loop digital-analog hybrid simulation. According to the method, the modeling is performed by applying a two-phase flow process, systems such as a boiler system, a steam turbine system, an electric system, a control and protection system and the like are truly simulated, and the gas-liquid two-phase process of the thermal power plant is accurately simulated, so that the capability and precision of long-term modeling in a power system of a thermal power plant in an existing digital-analog hybrid simulation technology are improved and the problem in real-time simulation of access of large-scale power grids to the power system of the thermal power plant is solved.

The invention discloses a metal screw pump vertical type simulation experiment method. The metal screw pump vertical type simulation experiment method comprises the steps that a driving system drives a pump system to work, sand containing liquid in a stirring system is sucked into a pump body by the pump system through a pumping pipeline, meanwhile, a measuring system on the pumping pipeline completes the measuring work, and then the sand containing liquid is pumped back into the stirring system by the pump system through a pumping out pipeline. The driving system and the pump system are arranged vertically, so that the fit clearance of a stator and a rotor in the pump system cannot be influenced by gravity; accordingly, the working state of the pump system in the pit is well simulated, and the movement working conditions of various mediums in the perpendicular flow direction are simulated precisely. The metal screw pump vertical type simulation experiment method has the following remarkable advantages that 1, by means of the perpendicular experiment device structure, vertical installation of the stator and the rotor is achieved, and the fit clearance of the stator and the rotor is prevented from being influenced by the gravity; and 2, the movement working conditions of the various mediums (sand, gas and the moisture content) in the perpendicular flow direction are simulated precisely.

A megawatt-grade hydroelectric generation simulation system comprises a first 10-kV busbar, an input switch cabinet, a high-voltage frequency converter, an output switch cabinet, a variable-frequency speed regulating asynchronous motor, a torque and rotational speed sensor TN, a synchronous motor, an excitation cabinet, an excitation transformer cabinet, a grid-connected switch cabinet and an operating table. The first 10-kV busbar is sequentially connected with the input switch cabinet, the high-voltage frequency converter, the output switch cabinet, the variable-frequency speed regulating asynchronous motor, the torque and rotational speed sensor TN, the synchronous motor and the grid-connected switch cabinet; the high-voltage frequency converter is further connected with the grid-connected switch cabinet, the excitation transformer cabinet, the excitation cabinet, the torque and rotational speed sensor TN and the operating table; the operating table is further connected with the grid-connected switch cabinet. The megawatt-grade hydroelectric generation simulation system is high in automation degree and expandability, simulates the running characteristics of a hydroelectric generating set through software control and also can be used for simulating the running characteristics of the other electric generation forms such as a gas turbine and a diesel generator through software extension.

A constant force device based on an air spring comprises a mechanism adapter piece (1), a cylinder body (2) and the like. The mechanism adapter piece (1) is installed at one end of the cylinder body (2), and an air floating supporting stop block (10) is installed at the other end of the cylinder body (2); an air-suspending piston (3) is installed in the cylinder body (2); an air floating support (5) is fixedly installed in the cylinder body (2) and axially limited through the air floating supporting stop block (10), one end of a piston rod (4) is connected with the air-suspending piston (3), the other end of the piston rod (4) sequentially penetrates through the air floating support (5) and the air floating supporting stop block (10) and then is connected with an air floating bearing (7) through a screw (6); and a first air inflow plug (8) and a second air inflow plug (9) are installed on the portions, on the two sides of the air-suspending piston (3), of the side wall of the cylinderbody (2). The constant force device is based on air pressure control, has certain bearing capacity and is an air constant force device which is low in rigidity, damping and friction.

The invention discloses a transformer simulation model for accurately simulating characteristics of an iron core. The model simulates excitation characteristics of the iron core of a transformer through a hysteresis loop, can accurately simulate hysteresis characteristics of the iron core, further improves the accuracy of electromagnetic transient simulation of a power system, and simulates the influence of transformer iron core remanence on the power system by setting an remanence value of the iron core. In addition, the transformer simulation model adopts a current source to simulate an excitation branch of the transformer and does not change a system matrix of simulation software in the simulation process, so that the simulation speed is improved.

The invention provides a method for realizing remote sensing image simulation under a given external orientation element. The method comprises the following steps: (1) inputting initial data; (2) calculating coordinates of a simulation image element in an image space coordinate system; (3) calculating a spin matrix from the image space coordinate system to an object space coordinate system, and transforming the coordinates of the simulation image element of the step (2) from the image space coordinate system to the object space coordinate system; (4) solving an undetermined proportionality coefficient in a coordinate equation; (5) solving coordinates of a center point of a ground imaging area corresponding to the simulation image element; (6) solving coordinates of four vertexes of the ground imaging area corresponding to the simulation image element; (7) determining an original surficial image element contained in the simulation image element, and calculating a solid angle of the original surficial image element in an instantaneous field of view of the simulation image element; and (8) transforming spatial resolution, and generating a remote sensing simulated image under the external orientation element of a given sensor. The method solves the problem of realizing high precision simulation of the remote sensing image by the external orientation element and a viewing angle under the position and posture of the given sensor.

The invention discloses a method for detecting a small target based on view angle conversion in a sea-sky-line scene. The method comprises the following steps: acquiring a to-be-detected image; identifying a sea-sky-line; selecting an effective rectangular area of the to-be-detected image; transversely segmenting the effective rectangular region into N2 image blocks, wherein an overlapping region exists between two adjacent image blocks; arranging the N2 image blocks in N rows and N columns to obtain a recombined image; detecting sea surface targets in the recombined image by using a deep learning network model, obtaining first coordinate information of each sea surface target, and combining the first coordinate information of each sea surface target into a first coordinate information set; and converting the first coordinate information of each sea surface target into second coordinate information of the sea surface target in the to-be-detected image, and forming a second coordinate information set. According to the invention, the detection precision of small target ships and small target buoys near the sea-sky-line is improved through the selection of the effective area and the recombination of the image blocks.

The invention discloses a numerical algorithm for simulating self-adaptive expansion of cracks, which comprises the following steps of: S1, determining a solving region according to a target problem of crack expansion, taking a region in which the cracks are not expanded in the solving region as a continuous solving region, and carrying out solving calculation on the crack expansion in the continuous solving region by utilizing a clone point technology; s2, the maximum tensile stress and the Mohr-Coulomb composite strength criterion act on the grids in the continuous solution domain to serve as the basis of crack initiation and the extension direction, and grid reconstruction is conducted in the crack initiation area; and S3, inheriting original grid information into the newly generated grid by adopting a space mapping technology, setting a contact surface at the newly added crack surface, and performing mechanical characteristic description of the crack surface by adding normal and tangential springs in the contact surface. According to the method, the dynamic expansion process simulation of the crack is realized, the problem that the crack expansion path is limited by the initial grid topology is solved, and the accurate simulation of the crack expansion direction is realized.

The invention provides a lumbar vertebra segment internal fixation mode simulation method and system based on deep learning. The method comprises the following steps: acquiring a CT lumbar vertebra segment scanning image; segmenting the obtained CT lumbar vertebra segment scanning image to obtain a vertebral body structure image; reconstructing a three-dimensional vertebral body model based on the segmented vertebral body structure and carrying out preprocessing; on the basis of the preprocessed three-dimensional vertebral body model, adding and assembling lumbar vertebra segment components to obtain a fixed three-dimensional lumbar vertebra segment model; on the basis of the three-dimensional lumbar segment model, carrying out grid division on the components of the model; carrying out finite element analysis on the basis of the three-dimensional lumbar segment model subjected to grid division to obtain a simulation result of a lumbar segment internal fixation mode; according to the method, the deep learning U-Net network is used for segmenting the image, the current situation that image annotation is troublesome and laborious is improved to a great extent, and a more accurate three-dimensional vertebral body model can be obtained.

The invention discloses an arc model construction method and system. The method comprises the steps that electric arc conductance is calculated according to acquired electric arc data, then mayr electric arc resistance and cascode electric arc resistance are acquired, a proportionality coefficient is set, and the mayr electric arc resistance and the cascode electric arc resistance are connected inseries according to the proportionality coefficient, so that electric arc stable resistance is acquired. Then establishing a first function relational expression and a second function relational expression; and finally, constructing an arc model according to the first function relational expression, the second function relational expression, a principle equation based on a mayr arc model and a principle equation of a class arc model. Compared with the prior art, the constructed arc model is wide in application range, the arc model can be dynamically constructed for the high-resistance arc andthe low-resistance arc by reasonably setting the proportionality coefficient, accurate simulation of the arc voltage and the arc current is achieved, and the experimental research efficiency of the arc is effectively improved.

The invention discloses a numerical control machine tool unobservable link simulation method and device, a terminal and a storage medium, and the method comprises the steps: generating a first training set according to the test data of an unobservable link, and obtaining a prediction model corresponding to the unobservable link based on the training of the first training set; adding the prediction model into a digital twinborn model of a target numerical control machine tool, obtaining input simulation data of an unobservable link based on a preorder link of the unobservable link in the target numerical control machine tool, inputting the input simulation data into the prediction model to obtain output simulation data of the unobservable link, and outputting the output simulation data to the target numerical control machine tool. Realizing simulation operation in the digital twin model of the target numerical control machine tool according to the output simulation data; and updating a prediction model in the digital twin model of the target numerical control machine tool according to a simulation operation result. According to the method, accurate simulation of the numerical control machine tool including unobservable links can be realized.

The invention discloses a brake test device for a two-wheeled motorcycle. The brake test device comprises a main drive system, a loading system, a wheelbase adjustment system, a chassis and an electric control system. A front roller and a rear roller of the main drive system are linked by a trapezoidal telescopic drive shaft; a motor is connected to one side of the rear roller in a length direction; and an inertia roller is connected to one side of the front roller in a length direction. Auxiliary rollers in the loading system are arranged at the two sides of the front roller and the rear roller respectively. The part of the front roller in the main drive system is installed at the wheelbase adjustment system; and the loading system is installed at the wheelbase adjustment system. A rotational speed torque sensor is arranged at one end of the rear roller of the main drive system; the rotational speed torque sensor and a pressure sensor arranged at the loading system are connected withthe electric control system. The main drive system, the loading system, and the wheelbase adjustment system are installed on the chassis. With teh wheelbase adjustment system, motorcycle testing withdifferent wheelbases is realized.