91results about How to "High simulation fidelity" patented technology

The invention is a soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control, which comprises a tester main body, a acquisition control device, a water supplement device, a loading device, wherein the water supplement device is connected with a bottom water supplement groove body of the tester main body; the acquisition control device is connected correspondingly with a A temperature sensor which is responsible for the monitoring of sample temperature gradient change in the tester main body, a displacement sensor, and a hydrostatic sensor; the acquisition control device is connected with a B temperature sensor in a semiconductor refrigerating body; the loading device is disposed in a pressure chamber in the tester main body. The advantages are that: according to the test water content, the test is supplemented with water and drained automatically from the lower part, the water supplement amount is calculated accurately; the hole pressure in the draining process is monitored. Continuous stepless loading is realized; the frost heaving force testing is realized after stepless continuous automatic loading and locking volume, and the simulation truth degree for natural conditions in laboratory frost-heaving and thawing-settlement test is improved, and the test efficiency is improved and the test labor intensity is reduced.

The invention provides a simulation system for low-gravity ramble, comprising a cross beam, a guide rail, a slide block, a fixed pulley, a first rope, a force test device, a control device, a second rope and a support band, wherein the guide rail is fixed on the cross beam, the slide block is installed on the guide rail, the fixed pulley is fixed on the slide block, and the first rope passes through the fixed pulley; the first rope is fixed by a rope fixer and is connected with one end of a loading device; the force test device is connected with the other end of the loading device; the control device is respectively connected with the loading device and the force test device; the second rope is connected with the force test device; and the support band is connected with the other end of the second rope. By automatically measuring the mass of an experimenter and equipment thereof, the simulation system for low-gravity ramble can automatically adapt to the height and the weight of the experimenter and can provide precise gravity compensation in real time in the process of simulating ground ramble, thereby greatly improving simulation trueness.

The invention discloses a full-object verification platform and a working method of a satellite magnetic detection and control system. The platform comprises a mono-axial air floated platform, a platform computer system, an angle measuring system, a communication computer, a mini-type magnetic simulator, a satellite magnetometer, a satellite computer and an environment simulation computer. In the method, the mono-axial air floated platform is used for simulating a small satellite in space; the environment simulation computer and the mini-type magnetic simulator are used for generating an on-track magnetic field; the real satellite magnetometer and the real satellite computer sense the on-track magnetic field and complete attitude measurement and the generation of a control instruction; the platform computer computes a magnetic moment required to be output according to an control moment instruction forwarded by the communication computer and the local geomagnetic numerical value output by the magnetometer on the platform and then sends the control instruction to a magnetic moment machine; and the magnetic moment machine and the local geomagnetism act to form an actual control moment so as to control the air floated platform be stabled at a certain angle or to move at a large angle. The full-object verification platform and the working method are low in cost, high in the fidelity of emulation verification and precise in control.

The invention discloses a large-size roadway support laboratory simulation system which comprises a large-size roadway support simulation system, a pressurizing transmission system and a support data acquisition system. The large-size roadway support simulation system consists of a large-size roadway appearance simulation mechanism and a support simulation mechanism. The pressurizing transmission system comprises a base, a lateral pressurizing transmission mechanism, an axial pressurizing transmission mechanism, a side pressure power system and an axial pressure power system. The support data acquisition system comprises an axial extensometer, a radial extensometer, a computer, an EDC digital controller and a pressurization controller. The end, exposed to the inside of a rubber ring, of each anchor rod is provided with a sound emission sensor. The invention further discloses a large-size roadway support laboratory simulation method. The system and the method can simulate underground roadway support effect, roadway side deformation and floor heave which are caused under pressure really according tot geological conditions of different mines and can also simulate state of creep instability of the roadway under disturbance.

The invention discloses a driving simulation system and method. The driving simulation system and method effectively simulate accidents and are high in simulation reality so that driving experience users can simulate driving conditions and traffic accidents scenes in various real car driving scenes and under different weather conditions, wherein the traffic accidents are not limited to rainy and snowy weather, car faults, car collisions, car tire burst and the like. Therefore, the users can become familiar with car driving at low cost and can practice in scenes which cannot be simulated easilyduring real car driving, the safety driving awareness and habits of the users are enhanced, and the correct operation experience under dangerous conditions is obtained.

The invention discloses a rock drilling simulation test device and a method for determining pressure and torque of a test pole, and belongs to the technical field of rock drilling research tests. The device mainly comprises a test piece cabin, the test pole, an emission rod, an emission sleeve, an air compression system and a test system, wherein a rock test piece is arranged in the test piece cabin. The method for determining the pressure and the torque of the test pole comprises the steps of enabling gas tank pressure to drive the emission rod to realize emission to collide the test pole, enabling the sharp end of a drill head of the test pole to collide the circular plane of the rotating rock test piece, collecting secondary impact loading waves Epsilon<i2>, compression waves Epsilon<r2> and torsion waves gamma of the test pole, analyzing and calculating acquired data to obtain the pressure and the torque of the test pole. The simulation test device has the characteristics of simple structure, high simulation authenticity and high test process repetitiveness, and has a test reference value and instruction significance for rock drilling engineering and scientific research.

The invention relates to a driving simulation system. The driving simulation system comprises a driving simulation device and a control device, wherein the control device is arranged in the driving simulation device, and the driving simulation device comprises a mechanical arm, head-mounted display equipment, a flight rocker and a cabin. The driving simulation system is simple to operate, high in simulation trueness, strong in experience sense and capable of realizing passive flight joy experience and active flight driving simulation.

The embodiment of the invention discloses a method and a device for obtaining the elastic-plastic elephant foot buckling critical load of a storage tank. The method comprises the following steps of: obtaining structural parameters of a storage tank, a storage tank accessory and a foundation; according to the geometrical structure and the stress-strain relationship of the material, establishing thefinite element model; setting a load and a maximum circumferential stress of the tank wall for the finite element full model, and setting a preset boundary condition for the finite element full model; taking the axial compression load data as the input variable of the finite element model, analyzing the elastic-plastic elephant buckling process of the tank, and obtaining the corresponding changedata between the axial compression stress and the deformation of the tank wall; obtaining the elastic-plastic elephant buckling critical load of the storage tank according to the corresponding changerelationship. The embodiment of the invention establishes a full finite element model, sets attribute data and other restrictive conditions of the storage tank, and takes axial pressure load data as input of the model to simulate and analyze the critical load that causes the tank wall of the storage tank to enter the elastic-plastic elephant foot buckling, which has the advantages of high simulation truthfulness and accurate calculation result.

A ultralow temperature environment composite sealing member seal reliability verifying method can carry out a reliability verifying test that includes a moment variable test and a flange butt joint surface gap simulation test; before the moment variable test and the flange butt joint surface gap simulation test, a test tool must be trench defect-free, and the trench dimensions must satisfy designrequirements; the sealing member reliability grade can be determined according to an applied moment that satisfies with moment variable test leak rate index requirements and a flange butt joint surface gap that satisfies with a leak rate index of the flange butt joint surface gap simulation test; the test is strong in representativeness, simple and feasible, and strong in versatility.

The invention discloses a complex electromagnetic environment construction method. The method comprises the following steps of: 1, carrying out vector decomposition on a space complex electromagneticenvironment to obtain a vector decomposition signal waveform set; step 2, carrying out vector signal waveform clipping on the vector decomposition signal waveform set; 3, normalizing the clipped vector decomposition signal waveform set to obtain a vector construction signal waveform set, converting the vector construction signal waveform set into an actual electromagnetic signal, and amplifying the actual electromagnetic signal; and step 4, constructing a signal waveform set by using the amplified vector to carry out space complex electromagnetic environment vector synthesis reconstruction. According to the complex electromagnetic environment construction method, a complex motion simulation mechanism is not needed, complex electromagnetic environment simulation encountered in the motion process of an effector can be completed in the static state of the effector, the construction difficulty of the complex electromagnetic environment is greatly simplified, and the construction fidelity is improved.

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 provides a random element generation method. The method comprises steps of acquiring a random element generation region, and using a set rectangular frame to carry out segmentation operation on the random element generation region so as to acquire multiple random element segmentation regions; according to a set density degree, generating random element positions in each random element generation region; and based on the random element positions in each random element generation region and avoidance regions in the random element generation region, generating random elements in each random element generation region. The invention also provides a random element generation device. According to the invention, by setting the random elements based on the random element generation regions, based on the positions of the random elements and the avoidance regions in the random element generation regions, the random elements are screened, so drawing efficiency of the random elementsis improved and simulation authenticity of the random elements is quite high.

The invention discloses a movable vibration exciter for simulating a train load and a loading method thereof. The movable vibration exciter comprises a rail mechanism, a traction device and a vibration device, the traction device and the vibration device are both movably arranged on the rail mechanism, the rear end of the traction device is hinged to the front end of the vibration device, the traction device is used for driving the vibration device to move on the rail mechanism, and the vibration device is used for generating variable-frequency excitation force to the rail mechanism. The traction device and the vibration device are arranged on the rail mechanism, the vibration device is driven by the traction device to move on the rail mechanism, variable-frequency excitation force is generated on the rail mechanism in the moving process of the vibration device, the loading process of the vibration device can effectively simulate the real train load, and the influence of the train loadon a roadbed is analyzed; guidance can be provided for engineering construction according to dynamic response result feedback of the roadbed, the train load can be well simulated, the difficulty is low, the simulation trueness is high, and the simulation is closer to the actual situation.

The invention provides a testing apparatus and an experimental method for simulating steam-water two-phase corrosion in internal parts of air-cooled condenser metal pipelines. The testing apparatus comprises a deoxygenation system, a circulating water tank, a simulated etch tank, a circulating water treating and monitoring system. The circulating water tank is placed in a water bath for keeping constant temperature, and the upper end of the water bath uses a foam board. A fine air tube which connects a nitrogen cylinder is inserted into the bottom part of a water tank, and the upper part of the water tank is led out with the fine tube and is connected to a vacuum pump. An electrode, a test piece and a thermometer are inserted into the simulated etch tank, and the simulated etch tank and a water tank pipeline are connected. The water tank is connected to the water treating and monitoring apparatus, the whole system employs a glass and silica gel tube, the system is a nonferrous system, the whole structure is simple, the operation is simple, and on-site environment can be really simulated.

The invention discloses a flat plate flow cavity capable of simultaneously applying static pulling force and flow shearing force. The flow cavity comprises a base (1) and a cover plate (2) which are mutually connected, wherein a flow cavity groove (3) is arranged in the base (1); a placing groove (4) is arranged at the bottom of the flow cavity groove (3); two ends of the placing groove (4) are respectively provided with a fixing groove (401) and a sliding groove (402); a flexible film (5) is arranged in the placing groove (4); one end of the flexible film (5) is provided with a first clampingpin (501) buckled into the fixing groove (401); the other end of the flexible film (5) is provided with a second clamping pin (502) buckled into the sliding groove (402); and a plurality of the sliding blocks (6) are arranged in the sliding groove (402) at the outer side of the second clamping pin (502). The flow cavity can simultaneously load static traction force and flow shearing force on cells and adjust the loaded stress.

The invention provides a simulation mount, as well as a control method, a scene terminal and a system of the simulation mount. The control method comprises the steps that the scene terminal receives a scene mode selected by a user, and shows a scene corresponding to the scene mode to the user, wherein the scene internally comprises a virtual mount; the scene terminal receives kinematic parameters reported by the simulation mount of the user, wherein the simulation mount collects the kinematic parameters of the user through a sensor mounted on a set part; and the scene terminal controls the virtual mount and the simulation mount to move synchronously according to the kinematic parameters, and therefore, the simulation verisimilitude of the simulation mount for the virtual mount of the scene terminal and the user experience are promoted.

The invention discloses a steady-state flow test device and method for a low-speed two-stroke marine diesel engine cylinder. The composition of the test device portion lies in that a fan is connectedto a surge tank, a flow meter, a mixing tank and a pressure regulator cylinder in sequence, and the air flow can enter a scavenging box along three passages of the pressure regulator cylinder; a scavenging port is connected to an extended cylinder sleeve, a linear motor is in shaft connection to a piston, the piston is located in the extended cylinder sleeve, an exhaust pipe is sealedly connectedto the extended cylinder sleeve, and exhaust valves are located in the extended cylinder sleeve; a support stand is provided with gears and racks that constitute a transmission pair, and the gears andracks move so that the exhaust valves are located at different positions in the extended cylinder sleeve. The test method thereof comprises the steps that the laser light source is incident on the cross section of the extended cylinder sleeve, and the two cameras are placed on both sides. The speed test is divided into three steps of obtaining camera measuring parameters; eliminating image distortion; and performing three-dimensional reconstruction on the CCD camera field of view. The device can obtain the flow fields at each section by using the PIV instrument system to test, and can measurethe global velocity and eddy current intensity.

The invention discloses a rail transit traction system test method and system. The method comprises the following steps of: S1. initializing a test system and determining a test line; S2. simulating and determining a first relation curve and a second relation curve when a train runs on the test line, wherein the first relation curve is a relation curve of the rotating speed and the time of a traction motor, and the second relation curve is a relation curve of the torque and the time of the traction motor; S3. operating an accompanying system according to the first relation curve, operating a tested system according to the second relation curve, and detecting and obtaining detection data of each detection sensor of the tested system; and S4. generating a detection report according to the detection data. The rail transit traction system test method and system have the advantages that the test requirements of the traction system in actual line operation can be simulated, various working conditions such as acceleration, the uniform speed, coasting and braking in actual operation are simulated, the test of the traction system on various indexes such as the temperature and the energy consumption is met, the test process and the test device are simple, and the like.

The invention relates to the technical field of system simulation, and discloses a complex system radar full-pulse digital generation method based on the headmost pulse. The complex system radar fullpulse digital generation method comprises the following process that the first arrival pulse in a radar signal pulse sequence is defined as the radar signal headmost pulse, and the first arrival radarsignal headmost pulse in a simulation scene is found; description word parameters of the first arrival radar signal headmost pulse are preserved into a to-be-output staggered pulse list, and the staggered pulse is calculated and generated; the leading-edge arrival time of the radar signal headmost pulse is updated; the leading-edge arrival time of the radar signal headmost pulse is corrected aiming at the radar signal transmission delay time; PDW parameters of the radar signal headmost pulse are updated; and dynamic calculating is conducted to complete full-pulse digital generation. The influences of radar antenna scanning on whether the pulse is generated or not and the pulse amplitude, and the influences of electromagnetic wave space transmission delay on the pulse arrival time are comprehensively balanced, and the characteristics of high extendibility, high simulation fidelity, high operation speed and the like are achieved.

The present invention provides a rubber bush model. The rubber bush model is formed by connecting the following four units in parallel: a nonlinear spring, a pure damper, a Maxwell model and an ASCL friction model, wherein the Maxwell model is formed by connecting another nonlinear spring and another pure damper in series; the ASCL friction model is formed by connecting a Kelvin-voigt model, which is formed by connecting another nonlinear spring and another pure damper in parallel, and a friction element in series; and finally, a function relationship between a carrying capacity of a bush and a deformation amount is established according to the model structure. The rubber bush model provided by the present invention is capable of expressing a nonlinear characteristic and a hysteresis characteristic of the rubber bush, so that dynamics modeling accuracy and emulation fidelity of a whole vehicle are improved, amplitude dependence and frequency dependence of the rubber bush can be relatively well emulated, a nonlinear transient characteristic of the rubber bush can be relatively well emulated, and switching between static friction and dynamic friction can be relatively well reflected.

The invention aims to provide a contour detection method based on a classic receptive field fixation micro-motion mechanism, and the method comprises the following steps: A, inputting a to-be-detectedimage obtained through gray processing, presetting a Gaussian function of a plurality of scale parameters, and obtaining the Gaussian filtering response of each scale parameter of each pixel point through calculation; b, calculating and obtaining a plurality of annular Gaussian first-order derivative functions in one-to-one correspondence with the plurality of scale parameters; c, for each pixelpoint, calculating and obtaining a micro-motion fusion response of each direction parameter of the pixel point; d, for each pixel point, taking the maximum value from the micro-motion fusion responseof each direction parameter of the pixel point as the classic receptive field response of the pixel point; e, presetting a distance weight function and an inhibition coefficient, and calculating inhibition response of each pixel point; and F, subtracting the suppression response of the pixel point from the classical receptive field response of each pixel point to obtain a final contour map. The contour detection method overcomes the defects in the prior art, and has the characteristics of strong simulation and high detection accuracy.