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74 results about "Machine simulation" patented technology

Metadata set driven robot fine control heterogeneous data real machine simulation evaluation method, medium and equipment

The invention discloses a metadata set driven robot fine control heterogeneous data real machine simulation evaluation method, a medium and equipment. Simulation data and real machine logs are uniformly converted into a directed acyclic task graph (DAG) with preconditions, effects and constraints through a stable action library, an attribute library and an object / robot adapter, a Meta-Dataset is constructed, and a comprehensive scoring model combining a process score (PS) and an area under a success rate-difficulty curve (AUC) is defined on the Meta-Dataset. The method comprises the following steps: introducing an anti-cheating client integrating a policy fingerprint attestation (PFA), an action Merkel log (AML) and a verifiable execution experiment (VEE) at a real machine side, extracting an environmental parameter vector theta by utilizing a theta encoder, performing conditional playback according to the theta in a simulation environment, obtaining a success rate and a confidence interval by adopting a posterior predictive inference (PPI), and combining with a real machine result to form a calibration score; and cross-dataset and cross-platform robot fine control unified evaluation with anti-cheating capability is realized.
Owner:SOUTHEAST UNIV

Dynamic earth pressure balance shield slurry film forming test device and maintenance observation method

The invention belongs to the technical field of slurry shield slurry film forming, and particularly relates to a dynamic earth pressure balance shield slurry film forming test device and a maintenance observation method.The dynamic earth pressure balance shield slurry film forming test device comprises a base assembly, a stratum box assembly, a shield tunneling machine simulation assembly and a driving assembly, and the stratum box assembly, the shield tunneling machine simulation assembly and the driving assembly are all installed on the base assembly; the shield tunneling machine simulation assembly is in butt joint fit with the stratum box assembly, and the driving assembly is connected with the shield tunneling machine simulation assembly and used for driving the shield tunneling machine simulation assembly to excavate and convey slurry. According to the invention, the limitation that only static simulation can be realized in the existing test can be solved, the actual construction working condition is fit, different water pressure stratum environments can be simulated, constant temperature, humidity and pressure of a mud film working environment can be maintained, the reference value of a test result is improved, and full-flow data from film forming to pressure maintaining and visual support are realized, and the performance of the mud film is accurately captured.
Owner:CHINA CONSTRUCTION THIRD ENGINEERING GROUP CO LTD DEYANG BRANCH +2

Method and system for presetting complete machine full-three-dimensional simulation initial field of aero-engine

The invention relates to the field of aero-engine complete machine full-three-dimensional numerical simulation, and discloses an aero-engine complete machine full-three-dimensional simulation initial field presetting method and system, and the method comprises the steps: obtaining initial flow field boundaries of different parts from the zero-dimensional level of a complete machine by solving inlet section parameters and outlet section parameters of each part; then obtaining an initial field of each blade row in a turbine part, which has the most critical influence on the convergence of an engine, through a quasi-three-dimensional layer S2, and realizing initial field decomposition from the part to the part; and finally, by adopting a radial basis function interpolation method, mapping the zero-dimensional data and the S2 quasi-three-dimensional parameters to each grid unit of the complete machine full-three-dimensional model of the aero-engine, and then smoothly splicing the initialized flow fields of all the components at the interface to form a continuous complete machine three-dimensional simulation initial field under the examination working condition. The convergence of a whole machine simulation example, the simulation convergence speed and the numerical stability are greatly improved, the simulation trial and error iteration is reduced, the pretreatment time consumption is reduced, and the simulation speed and efficiency are improved.
Owner:TAIHANG NATIONAL LABORATORY

Five-axis real-time cutting simulation method based on voxels

The invention relates to the technical field of machining simulation, in particular to a voxel-based five-axis real-time cutting simulation method, which comprises the following steps of: determining a voxel size according to the number of rendered voxels, and performing voxelization processing on workpiece modeling according to the voxel size to obtain a workpiece voxel grid model; carrying out blocking processing on the workpiece voxel grid model to obtain a plurality of voxel blocks; and updating and rendering the model voxel in the voxel block according to the pose information of the cutter. In order to solve the problem that in the prior art, when large-scale voxels are processed in the cutting simulation process, efficiency is low or precision is insufficient, the size of the rendered voxels is dynamically calculated through workpiece modeling, voxelization processing is carried out, the good rendering efficiency is achieved, block processing is carried out on a workpiece voxel grid model, and the processing efficiency is improved. When cutting is simulated, only the specific block making contact with the cutter is locally updated, the number of voxels needing to be simulated and rendered again is reduced, and the processing efficiency is improved.
Owner:SHANGHAI TOPNC NUMERICAL CONTROL TECH CO LTD

Simulation virtual debugging method and system

A simulation virtual debugging method and system are applied to debugging of a nuclear reactor refueling machine control system, and the method comprises the following steps: generating an operation sequence according to a received refueling demand, the operation sequence comprising a plurality of equipment instructions; simulating the equipment instruction through a pre-constructed refueling machine simulation model and a preset buoyancy algorithm rule to obtain simulation result information; and debugging the nuclear reactor refueling machine control system according to the simulation result information. According to the scheme, the debugging work of the nuclear reactor refueling machine control system can be started without waiting for mechanical equipment to arrive at a factory, the project production time can be shortened, and the debugging accuracy, reliability and debugging efficiency can be ensured.
Owner:BEIJING HELISHI CONTROL TECH CO LTD

Coating device airflow field optimization method and system, electronic equipment and computer readable storage medium

The invention relates to the technical field of vapor deposition coating, in particular to a coating device airflow field optimization method and system, electronic equipment and a computer readable storage medium, and the method comprises the steps that a first coating device simulation model is established based on original structure parameters of an entity coating device, and the original structure parameters comprise to-be-adjusted parameters; configuring simulation parameters and simulation boundary conditions of the first coating device simulation model according to preset process conditions of the entity coating device to obtain a second coating device simulation model; performing airflow field simulation based on the second coating device simulation model to obtain a simulation result; judging whether the simulation result meets a preset condition or not; and when it is determined that the simulation result meets a preset condition, setting an entity coating device according to the corresponding numerical value of the to-be-adjusted parameter in the second coating device simulation model, and finally improving the film thickness consistency of coating of the coating device.
Owner:HUNAN KIBING SOLAR TECH CO LTD

Simulation calculation method for ventilation process of engine based on three-dimensional iteration calibration

The invention discloses an engine ventilation process simulation calculation method based on three-dimensional iteration calibration, and belongs to the technical field of engine simulation data processing. The invention discloses an engine ventilation process simulation calculation method based on three-dimensional iteration calibration. The method comprises the steps that a one-dimensional simulation model and a three-dimensional simulation model of an intake and exhaust pipe system of an engine are constructed; same parabolic pressure wave boundary conditions are applied to air ports of the one-dimensional simulation model and the three-dimensional simulation model; calibrating the one-dimensional simulation model by iteratively adjusting structural parameters of key pipe sections of the one-dimensional simulation model by taking pressure waveforms of air cavities and header pipe nodes in the three-dimensional simulation model as references; and applying the calibrated one-dimensional simulation model to the one-dimensional model of the whole engine. By adopting the engine ventilation process simulation calculation method based on the three-dimensional iteration calibration, the problem that the whole machine simulation design efficiency is low due to the fact that the coupling relation is complex and the calculation time is long in the existing engine three-dimensional ventilation process can be solved.
Owner:BEIJING INST OF TECH

Verification method and verification system

The invention provides a verification method and a verification system, and belongs to the technical field of network security. According to the method, by generating the verification code image containing the non-character pattern contour, dependence of traditional OCR on characters can be avoided essentially, and safety is improved from the attack root. And meanwhile, a plurality of text feature options and at least one interference option are generated in combination with a visual feature extraction model, so that dual verification (including option semantic verification and behavior track verification) on user operation can be realized, multi-level cross inspection can be performed on the user operation, and attack of an automatic script can be effectively identified and blocked. In addition, by introducing depicting track verification based on a non-character pattern contour, the interaction mode that a traditional click verification code is single is broken, and an active behavior dimension which is difficult to be simulated by a machine is added for the verification process. Thus, through a dual verification mechanism of semantic hiding and behavior trajectory analysis, the success rate of machine attacks can be significantly reduced, and dual improvement of security protection and user experience is realized.
Owner:WEBANK (CHINA)

Parallel flow channel heat exchanger flow distribution simulation method based on general flow resistance model

The application is based on a parallel flow passage heat exchanger flow distribution simulation method of a general flow resistance model: one, single channel general flow resistance model construction stage: create a general flow resistance model; single channel fine modeling and simulation; obtain pressure drop-flow rate data; fitting to determine the flow resistance coefficient; two, whole machine flow distribution simulation stage: build the whole machine simulation model: establish the three-dimensional geometric model of the macro flow channel system of the target heat exchanger and carry out grid division to obtain the macro flow channel CFD model, abstract all parallel microchannels of the core heat exchange section of the target heat exchanger into a parallel flow resistance network composed of a large number of flow resistance elements, each flow resistance element is endowed with the general flow resistance model with a specific flow resistance coefficient which has been determined in stage one; coupling solution, establish an iteration process, make the error between the driving pressure difference of each flow resistance element and the pressure drop calculated according to the general flow resistance model less than a preset threshold, and the iteration converges; output the flow distribution results of all parallel flow passages of the target heat exchanger.
Owner:SHANGHAI JIDING INFORMATION TECH CO LTD

Dynamic refrigerant filling process based on complete machine simulation operation

PendingCN121993935AImproved energy efficiency consistencysmall dispersionRefrigeration componentsThermodynamicsReal-time data
The invention discloses a refrigerant dynamic charging process based on complete machine simulation operation, and belongs to the technical field of air conditioners and heat pumps. The problem that existing refrigerant charging depends on a static target value and cannot adapt to system individual differences and working condition changes in a self-adaption mode is solved. According to the process, a digital twinborn simulation model of a to-be-charged air conditioning system is constructed, the system is started to operate under a preset simulation working condition, and a first operation parameter is collected to initialize and calibrate the model; dynamically filling the refrigerant according to a preset step length, continuously collecting a real-time second operation parameter, and feeding the real-time second operation parameter back to the model; on the basis of real-time data, the model performs online fitting on a changing curve of parameters such as the supercooling degree and the superheat degree along with the charging amount, and predicts the refrigerant amount when the energy efficiency ratio of the system reaches the optimal as the optimal charging target; and when the parameters collected in real time and the extreme value region predicted by the model converge, it is judged that filling is completed. According to the system and the method, 'tailoring 'type dynamic accurate charging aiming at each specific air conditioning system is realized, and the charging precision and the system operation energy efficiency are remarkably improved.
Owner:SHANGHAI HUIZHUO REFRIGERATION EQUIP CO LTD

Parallel flow channel heat exchanger flow distribution simulation method based on general flow resistance model

The invention discloses a parallel flow channel heat exchanger flow distribution simulation method based on a general flow resistance model. The method comprises the following steps: 1, a single-channel general flow resistance model construction stage: creating a general flow resistance model; carrying out single-channel fine modeling and simulation; acquiring pressure drop-flow velocity data; fitting to determine a flow resistance coefficient; 2, a whole machine flow distribution simulation stage: constructing a whole machine simulation model: establishing a three-dimensional geometric model of a macroscopic flow channel system of a target heat exchanger, performing grid division to obtain a macroscopic flow channel CFD model, abstracting all parallel micro-channels of a core heat exchange section of the target heat exchanger into a parallel flow resistance network consisting of a large number of flow resistance elements, each flow resistance element is endowed with a universal flow resistance model which is determined in the first stage and has a specific flow resistance coefficient; coupling solution is carried out, an iteration process is established, the error between the driving pressure difference of each flow resistance element and the pressure drop calculated according to the general flow resistance model is smaller than a preset threshold value, and iteration convergence is carried out; and outputting a flow distribution result of all parallel flow channels of the whole target heat exchanger.
Owner:SHANGHAI JIDING INFORMATION TECH CO LTD

Traction machine simulation failure test device

This invention provides a traction machine fault simulation test device, which, for existing traction machine operating conditions, provides testing personnel with a more effective testing scenario in the detection process, simulating brake spring torque decay and brake foreign object obstruction in an off-site manner. The traction machine fault simulation test device includes a brake arm displacement adjustment unit and a braking torque adjustment unit. The brake arm displacement adjustment unit includes a drive mechanism for rotating a rotating shaft that drives the manual release lever of the traction machine brake. The braking torque adjustment unit includes a horizontal linear guide rail parallel to the brake spring axis of the traction machine and a sliding seat mounted on the horizontal linear guide rail that can slide freely. A rotary motor and a first rotating component connected to the power output end of the rotary motor are mounted on the sliding seat. The first rotating component is coaxially arranged with the brake spring and can engage a reaction nut on the outside of the brake spring.
Owner:TIANJIN SPECIAL EQUIP INSPECTION INST

System and method for verifying control function of satellite reflector antenna

The invention provides a satellite reflector antenna control function verification system and method. The system comprises a stand-alone simulation subsystem, a timing system module and a consistency comparison module. The timing system module is respectively connected with input interfaces of the simulation software modules for communication, and the consistency comparison module is respectively connected with output interfaces of the simulation software modules for communication; the timing system module is used for simulating and generating unified timing system information and sending the unified timing system information to the single-machine simulation subsystem and the consistency comparison module for time sequence calibration; the single machine simulation subsystem is used for acquiring virtual data of each satellite single machine in a target planning scene through each simulation software module matched with the target planning scene according to the target planning scene of the satellite reflector antenna, and sending the virtual data to the consistency comparison module; the consistency comparison module is used for comparing the virtual data corresponding to each satellite single machine with the real data, and judging whether the conditions in a preset theoretical range are met or not.
Owner:INNOVATION ACAD FOR MICROSATELLITES OF CAS +1

An excavator-anchor machine simulation training device

This utility model relates to a tunneling and anchoring machine simulation training device, comprising a preset machine frame assembly, a preset electrical control box, and a preset drive mechanism. The preset machine frame assembly is proportionally reduced in size, and the preset power supply voltage of the preset electrical control box is reduced. The preset electrical control box includes a signal acquisition unit, a remote control receiver, and a controller. The signal acquisition unit is used to acquire switch signals and analog signals. The remote control receiver is used to receive control signals. The controller generates corresponding control commands based on the analog signals, switch signals, and / or control signals. The preset drive mechanism includes multiple preset hydraulic cylinders, a preset motor, and a solenoid valve. The preset hydraulic cylinders and preset motors actuate to drive the corresponding preset machine frame assembly to perform corresponding actions. The corresponding solenoid valves are controlled according to the control commands to drive the corresponding preset hydraulic cylinders to extend and retract and / or control the operation of the corresponding preset motors. This utility model tunneling and anchoring machine simulation training device facilitates technical experiments and practical training.
Owner:ZHENGZHOU HENGDA INTELLIGENT CONTROL TECHNOLOGY CO LTD +1

Synchronous updating and real-time rendering method based on tri-dexel model

The invention discloses a synchronous updating and real-time rendering method based on a tri-dexel model, and relates to the field of computer graphics and numerical control machining simulation, and the method comprises the steps: firstly initializing a workpiece model, building the tri-dexel model, converting the tri-dexel model into voxel data, and loading the voxel data to a GPU; dynamically updating the tri-dexel model according to a tool path during processing, and synchronizing voxel data to the GPU; during rendering, sight lines are projected to pixels from a camera, the GPU judges the intersection condition in parallel, a triangular patch is reconstructed and colored if intersection occurs, and the pixels are colorless if not; according to the synchronous updating and real-time rendering method based on the tri-dexel model, efficient real-time rendering of a high-precision model in dynamic machining is achieved, and the method is suitable for scenes such as numerical control milling and additive manufacturing.
Owner:SHANGHAI JIAOTONG UNIV

A data encryption transmission method and system applied to an all-in-one machine simulation model

This invention relates to the field of secure communication technology, and specifically discloses a data encryption transmission method and system applied to an all-in-one machine simulation model. The method includes: acquiring dynamic data of the all-in-one machine simulation model in real time; dividing the data to be transmitted into blocks based on the original encryption density range of all nodes in the dynamic parameter tree of the all-in-one machine simulation model constructed using the dynamic data, to obtain a set of data blocks to be transmitted; encrypting the set of data blocks to be transmitted separately based on the multi-dimensional encryption-related features and block division rules of the set of data blocks to be transmitted, to obtain a set of encrypted data blocks; managing the set of encrypted data blocks based on a multi-level key system to obtain secure management data; transmitting the secure management data to the receiving end based on a dual-link communication method, and performing multi-node collaborative verification at the receiving end through a blockchain node network to obtain the data decryption verification result. This invention can improve the security, anti-attack capability, and real-time performance of all-in-one machine simulation data transmission based on secure communication technology, preventing the data to be transmitted from being tampered with, stolen, or illegally accessed.
Owner:JINJI FUTURE (SHENZHEN) TECHNOLOGY CO LTD

Gear shaping machining method and device based on non-uniform meshing, medium and equipment

The invention discloses a gear shaping machining method and device based on non-uniform meshing, a medium and equipment, and relates to the technical field of gear slotting, and the gear shaping machining method comprises the steps that an error prediction model is adopted to predict the tooth pitch accumulated total deviation and the gear ring radial run-out tolerance of a to-be-machined gear, and a gear error prediction result is obtained; decoupling the gear error prediction result to a cutter radial feed shaft, a cutter rotating shaft and a workpiece rotating shaft of the gear shaping machine based on a mapping relation between each motion shaft of the gear shaping machine and the gear error to obtain an error decoupling result of each shaft, and adjusting machining process parameters of the cutter radial feed shaft and the cutter rotating shaft according to the error decoupling results; a non-uniform meshing slotting process path is designed, and a gear shaping machining compensation program is generated in combination with the adjusted machining process parameters; and the non-uniform meshing slotting process path and the gear shaping machining compensation program are imported into a gear shaping machining simulation environment for gear shaping machining simulation verification, and gear shaping machining based on non-uniform meshing is completed.
Owner:GENERAL TECH GRP MASCH TOOL ENG RES INST (TIANJIN) CO LTD

Processing surface quality and roughness virtual measurement method and system based on point cloud

The invention provides a virtual measurement method and system for machining surface quality and roughness based on point cloud, and belongs to the technical field of numerical control machining simulation and digital detection. The method comprises the steps that a geometric model of a machined workpiece shape is obtained through machining process simulation; extracting three-dimensional point cloud data of the surface of the workpiece from the geometric model; performing spatial structure analysis on the point cloud data to judge a surface forming quality state; and calculating the surface roughness based on the forming quality state and the machining process parameters. According to the method, a three-dimensional discrete element model is adopted for high-precision material removal simulation, point cloud efficient analysis is achieved through a KDTree structure, a roughness calculation model is built in combination with tool geometry and motion parameters, and accurate prediction of the surface quality before machining is achieved. The problem that simulation and quality evaluation are disjointed is solved, traditional post-event detection can be replaced, trial cutting cost is reduced, and data support is provided for process optimization.
Owner:SHANGHAI JIAOTONG UNIV

Chain haulage coal cutter dragline system simulation test device

The present application relates to a kind of chain haulage coal mining machine towrope system simulation test device, wherein first, second slider respectively with first, second linear guide sliding fit, coal mining machine simulation model and towrope trolley simulation model are respectively fixed on first, second slider, the output shaft of first variable frequency motor and first vertical bearing seat each coaxially installed with first sprocket, first chain is wound on first sprocket and forms chain transmission with it, the output shaft of second variable frequency motor and second vertical bearing seat each coaxially installed with second sprocket, second chain is wound on second sprocket and forms chain transmission with it, first, second chain is respectively fixedly connected with coal mining machine simulation model and towrope trolley simulation model, towrope simulation model is arranged in U shape after passing through the pulley on towrope trolley simulation model, one end is fixed on coal mining machine simulation model, the other end is relative to the one end of first linear guide fixed.The present application can provide theoretical basis and design reference for chain haulage coal mining machine towrope system design.
Owner:SHANGHAI TIANDI MINING EQUIP TECH CO LTD +2

Electric vehicle group charging and discharging composite uncertainty modeling method, device, equipment, medium and product

The invention discloses an electric vehicle group charging and discharging composite uncertainty modeling method and device, equipment, a medium and a product, and relates to the technical field of electric vehicle and power grid interaction.The method comprises the steps that multi-source data is obtained; based on the vehicle performance parameters, the user behavior data and the environment data, establishing a probability model of the generality uncertainty parameters and the non-generality uncertainty parameters; generating a plurality of groups of parameter samples by adopting a Latin hypercube sampling method based on the probability model; adopting a Monte Carlo simulation method, aiming at each group of parameter samples, simulating based on a four-state machine model, and predicting the power of each electric vehicle at each moment; and respectively accumulating the corresponding powers of all the electric vehicles at each moment to obtain a load prediction curve of the electric vehicle group. According to the method, the uncertainty of three types of parameters including the vehicle performance, the user behavior and the environment is comprehensively considered, and a more accurate load prediction result is provided through probability distribution fitting, Latin hypercube sampling and four-state machine simulation.
Owner:BEIJING INSTITUTE OF TECHNOLOGY (ZHUHAI)

Dynamic identification method for dynamic seal abrasion loss of aviation flight control actuator

The invention discloses a dynamic identification method for dynamic seal abrasion loss of an aviation flight control actuator, which belongs to the field of reliability simulation of mechanical and electrical products and comprises the following steps of: constructing a dynamic seal abrasion model of the abrasion loss of a sealing material of the aviation flight control actuator along with time change; coupling the dynamic seal wear model with a hydraulic transmission model and a control system model, and establishing a complete machine simulation model for simulating the macro performance change of the actuator at different time points; according to the whole machine simulation model, an order reduction agent model with the abrasion loss and time as input and key performance response indexes as output is constructed; and on the basis of the reduced-order agent model and the actually measured key performance response index, a dynamic seal wear coefficient is obtained through a reverse optimization algorithm, and the dynamic seal wear amount of the aviation flight control actuator is dynamically identified. On the premise of not depending on frequent disassembly and assembly, online acquisition and identification of the abrasion loss at different time nodes can be achieved, and technical support is provided for reliability prediction and service life evaluation of the aviation flight control actuator.
Owner:CHINA AERO POLYTECH ESTAB

A projection-based numerical control machining simulation method and medium

The application discloses a kind of based on projection numerical control processing simulation method and medium, the method includes the following steps: the three-dimensional model of the workpiece to be processed is imported;Obtain the projection view of three-dimensional model, projection view includes front view, rear view, left view, right view, top view and overhead view;Surface machining feature information and depth cross-section machining feature information of the workpiece to be processed are obtained based on projection view;According to surface machining feature information and depth cross-section machining feature information, determine the region to be processed;According to depth cross-section machining feature information and the region to be processed, generate tool contact point trajectory;Based on tool contact point trajectory, generate numerical control processing trajectory, simulate.The application determines the region to be processed based on the projection six views of three-dimensional model, generates tool machining trajectory, can obtain higher precision processing area;And from three-dimensional model directly generate machining trajectory, without converting three-dimensional parts into two-dimensional drawing again processing trajectory design, greatly improve the efficiency of workpiece processing.
Owner:GUANGDONG UNIV OF TECH +1

Method for solving contour error in grinding cam simulation

The invention discloses a method for solving a contour error in grinding cam simulation, which relates to the field of numerical control grinding machine simulation, and comprises the following steps of: establishing a contour model of a processed raw material and a grinding cutter, and simulating a grinding process by moving the center of the cutter around the raw material along a motion path; the method comprises the following steps: carrying out logic NOT operation on a cutter contour and a raw material contour in a motion process to obtain a simulated cam contour, carrying out circumferential step pitch homogenization approximation on a target cam and the simulated cam to obtain an approximate cam contour with equal step pitches, carrying out radial difference on points on each step pitch to obtain a radial contour error, according to the method, the normal of the point on each step pitch is solved, the difference between the normal and the intersection point of the two contours is obtained, a normal contour error is obtained, the normal contour error is superposed with the normal size of the driven piece to obtain a stroke error of the driven piece, and the cam contour error with a good effect is obtained at a low sampling rate through the contour error solving method.
Owner:BEIJING INFORMATION SCI & TECH UNIV

An aluminum profile machining simulation method, system, medium and product

A method, system, medium, and product for simulating aluminum profile processing are disclosed. The method includes: acquiring a theoretical three-dimensional model, theoretical assembly parameters, actual assembly measurement data, and electrical control parameters of an aluminum profile processing equipment; calculating the assembly geometric deviation between the actual assembly measurement data and the theoretical assembly parameters; performing position correction on the theoretical three-dimensional model to generate a corrected digital twin model; parsing the processing code to be executed corresponding to the aluminum profile processing request to obtain the theoretical toolpath; determining whether there is a spatial interference state in the corrected digital twin model within the processing cycle corresponding to the simulation driving instruction sequence; if the spatial interference state exists, generating a warning message; if the spatial interference state does not exist, generating a safe processing instruction. This application improves the accuracy of aluminum profile processing simulation.
Owner:SHANDONG LEDE CNC MACHINERY

Sharp curve shield tunneling pushing test device and use method thereof

The invention discloses a sharp curve shield tunneling pushing test device and a use method thereof. The sharp curve shield tunneling pushing test device comprises a tunnel model and a shield head model which are arranged in a model box, and a soil sample is filled to simulate an underground soil layer; the tunnel model is of an equal-proportion-reduced shield tunnel structure, one end of the tunnel model is tightly attached to the reaction wall baffle, one side of the other end of the tunnel model is connected with the shield head model through a connecting hinge, and the other side of the other end of the tunnel model abuts against the stepping motor. The stepping motor is used for simulating a shield jack during curve shield tunneling pushing, is fixedly connected with the shield head model, and pushes the tunnel model through the dowel bar to enable the tunnel model to rotate relative to the shield head model; the surface of the tunnel model is provided with various monitoring sensors including strain gauges and soil pressure cells. During testing, data is collected through the testing device and then processed. According to the invention, the technical blank of on-machine simulation of the centrifugal test for the urgent curve shield tunneling is filled up, and an effective means is provided for indoor research of the urgent curve shield tunneling of municipal administration, so that the engineering risk is reduced, the construction safety is guaranteed, and the engineering budget is optimized.
Owner:SHANGHAI URBAN CONSTRUCTION DESIGN & RESEARCH INSTITUTE (GROUP) CO LTD

Numerical control machine tool real-time processing optimization system based on digital twinning

The invention relates to the technical field of artificial intelligence, and discloses a numerical control machine tool real-time processing optimization system based on digital twinning, which comprises a digital twinning construction module, a simulation processing simulation module, a processing error analysis module, a processing error correction module, an optimization instruction generation module and an instruction optimization feedback module, the method comprises the following steps: constructing a machine tool digital twin model based on real-time processing data of a numerical control machine tool, performing real-time simulation on the real-time processing data to generate simulated processing data, further analyzing errors of the real-time processing data, performing error difference correction processing on processing errors to obtain optimized control parameters, then generating a processing optimized control instruction, and finally performing optimization control on the processing optimized control instruction. Updating the real-time processing data of the numerical control machine tool; according to the method, the optimization precision of the real-time processing data of the numerical control machine tool based on digital twinning can be improved.
Owner:DONGGUAN HENGYU MACHINERY CO LTD

Embedded numerical control machining simulation method

The invention provides an embedded numerical control machining simulation method, which is applied to an embedded processor and comprises the following steps of: S1, initializing cutter feature information of numerical control equipment; s2, receiving the cutter state information transmitted by the sensor, and performing digital processing on the received cutter state information to obtain cutter state data; s3, feature extraction is carried out according to the obtained cutter state data, and cutter state feature data are obtained; s4, impact force simulation analysis is conducted according to the obtained cutter state characteristic data, and an impact force simulation analysis result is obtained; s5, calling a corresponding tool wear state simulation model to perform tool wear simulation analysis according to the impact force simulation analysis result to obtain a tool wear state simulation analysis result; and S6, when the cutter wear state simulation analysis result is abnormal, corresponding early warning information is sent to an upper computer. According to the invention, the real-time performance and the reliability of the processing state analog simulation of the numerical control equipment can be improved.
Owner:GUANGZHOU YIDA TECH CO LTD

A signal-level simulation method for an airborne pulse Doppler radar system

The present application relates to a kind of airborne pulse Doppler radar system signal level simulation method, the method is established radar system three-dimensional scene by STK software, then through SystemVue software builds airborne pulse Doppler radar signal level simulation model, simultaneously by simulation scene interface model and STK software connection, read the parameter information in the parameter configuration file report of the detected aircraft target in Access association, after running machine simulation model, obtain the visualized graphic simulation result of the speed and distance of the detected aircraft target of each level processing process of airborne pulse Doppler radar signal and the detection simulation result of airborne pulse Doppler radar.The present application can make the design, application, verification of airborne pulse Doppler radar system more close to actual use scene, and greatly improve the fidelity and practicality of airborne pulse Doppler radar system simulation, provide a platform for system to carry out actual confrontation environment digital verification.
Owner:PLA AIR FORCE AVIATION UNIVERSITY

Machining error factor analysis device, machining system and method for analyzing machining error factors

A machining defect factor analyzer (100) that analyzes a factor in a machining defect arising on a machined surface processed by a machining device according to a machining program comprises a machining simulation unit (11) that performs a simulation based on the machining program to generate an ideal machined surface, a first state observation unit (12) that observes a first state variable indicating the state of an actual machined surface being machined according to the machining program, a second state observation unit (13) that observes a second state variable indicating the state of the machined surface generated by the machining simulation unit (11), and a state variable comparison unit (14).outputs the state variable comparison information, which shows the result of a comparison between the first state variable and the second state variable, and a training unit (16) that generates a trained model to derive the processing error factor from the state variable comparison information using training data that includes the state variable comparison information and information that shows a processing error factor that was generated on the actually processed surface.
Owner:MITSUBISHI ELECTRIC CORP