265 results about "Machine simulation" patented technology

A simulation and control system for a machine is disclosed. The simulation and control system may have a user interface configured to display a simulated environment. The machine simulation and control system may also have a controller in communication with the user interface and a remotely located machine. The controller may be configured to receive from the machine real-time information related to operation of the machine at a worksite. The controller may also be configured to simulate the worksite, operation of the machine, and movement of a machine tool based on the received information. The controller may further be configured to provide to the user interface the simulated worksite, operation, and movement in the simulated environment.

A method of simulation of NC machining, wherein machining simulation is carried out according to blank shape data, tool shape data and an NC program to modify the NC program or interpolation data by feedforward control so that optimum cutting conditions can be obtained. The simulation result can be used for correcting the NC program and the interpolation data at the next stage. Further, a record of tools used can be generated on the basis of this simulation result.

The invention relates to an aeroelastic stability fluid-structure interaction prediction method of turbo-machine changed interblade phase angles, which predicts the aeroelastic stability of a turbo-machine through the modal pneumatic damping ratio of different interblade phase angles by adopting an energy method. The method adopts the modal analysis containing prestress on established single-sector finite element models, realizes the vibration displacement transfer on the fluid-structure interaction interface through a data transfer method, adopts the dynamic mesh technology for obtaining mesh files taking the interblade phase angles into consideration, is used for unsteady computation fluid mechanic analysis of Junction Box modules in CFX, further obtains the modal pneumatic damping ratio of each interblade phase angle, and is used for predicting the aeroelastic stability. The method based on the fluid-structure interaction fully utilizes the cutting edge technology of the computational structural mechanics and the computation fluid mechanics, ensures the computation precision in each sub system, and improves the computation efficiency through the division of a fixed region and a movable region. The invention has good practical value and wide application prospects in the technical field of turbo-machine simulation.

The invention relates to a method for automatic control over laser shock peening. The method comprises the following steps that a part analysis model is built in mechanical analysis software according to the machining requirement, and residual stress distribution is obtained; residual stress distribution is guided into CAE analysis software, and a machining motion track acting on the surface of a part is automatically generated; meanwhile, technological parameters corresponding to a laser shock wave pressure set value are selected by an industrial personal computer according to the relation between laser shock wave pressure and laser peening technological parameters; the machining motion track and the technological parameters are guided into the mechanical analysis software for simulation so as to obtain a strain value after machining simulation; and if the strain value is within the set range, the technological parameters are sent to a laser device through the industrial personal computer, the machining motion track is sent to a robot, and automatic laser machining is achieved. By means of the method, laser shock peening of an integral blade disc can be achieved, quantitative precise control over residual stress is achieved, the service life of the integral blade disc is effectively prolonged, and the foreign matter damage resisting capacity of the integral blade disc is effectively improved.

A machining simulation method using a plurality of equally sized regular volumes such as cubes to represent the surface of a raw stock object at a relatively low resolution. Each regular volume contains a reference to that portion of the original stock surface falling within that regular volume. The regular volumes affected by the swept volume of each tool movement are readily determined, and a pointer to that tool movement is added to each affected regular volume. The finished data may be expanded in detail at any portion of interest to create fully realised surface geometry with full boundary information by combining the original stock surface and the relevant surfaces of each tool movement. The original stock object may be displayed using the low-resolution regular volumes from any convenient view point, and may be animated in real time to show the effects of each tool movement.

The invention discloses a double-turntable five-axis numerical control machine tool virtual assembling and numerical control machining simulation method and provides a simulation method capable of improving simulation efficiency under the premise of guaranteeing simulation correctness. The method includes: modeling; conducting three-dimensional modeling of blanks and clamps required in all moving components, a machine tool body and numerical control machining; connecting all moving components and the machine tool body to conduct virtual assembling according to a moving relation by using a Pro/E three-dimensional platform; operating a virtual simulating machine tool; outputting models of all components in a standard template library (STL) form on the basis of the same coordinate system; establishing a double-turntable five-axis numerical control machine tool virtual model; establishing a model tree in VERICUT, and the sequence of model components includes two branches: machine tool body Base - Y axis - X axis - A axis - C axis - clamp - blank and machine tool body Base - Z axis - main axis - tool; the STL assembly model output by Pro/E is led into corresponding components in VERICUT directly, namely the double-turntable five-axis numerical control machine tool virtual model is established; and numerical control machining simulation is operated.

The invention discloses a large-sized water turbine blade multi-shaft linkage numerical control machining method based on a casting roughcast. The method comprises the steps: 1) carrying out a three-dimensional coordinate measurement on a water turbine blade roughcast by a large-sized coordinate measuring machine, carrying out a point cloud acquisition of the blade roughcast by a scanner; 2) according to three-dimensional coordinate data and point cloud data of the blade roughcast obtained in the step 1), processing the three-dimensional coordinate data and the point cloud data of the blade roughcast by a computer, and then generating a computer model of the blade roughcast entity; and 3) based on the computer model of the blade roughcast entity obtained in the step 2), machining the roughcast entity of the giant water turbine blade by a numerical control programming, planning tool paths, and performing a machine simulation cutting emulation. Through the method, the accurate computer model of the blade roughcast entity can be obtained, and the roughcast entity can be flexibly preprocessed; the tool path empty knives are fewer, and thus the machining efficiency is high; the cutter spacing is reliable, and thus the quality accident is reduced; and the cutting condition is good, and thus the effective utilization rate is high.

The invention discloses a turbine blade numerical control belt grinder and a control method thereof, which relates to a grinding and processing device of a turbine blade and the control method thereof, and is characterized in that: a belt wheelhead and an open numerical control system is provided on the basis of the basic parts of the original machine tool; the belt wheelhead is provided with a grinding belt tightening device and a transmission belt tightening device; a Z-axis serving motor drives a big carriage; an X-axis serving motor drives a small carriage; a C-axis drives a head frame; a B-axis drives a turret; a D-axis is a belt wheelhead motor; and each motor is connected with the control system; the control system is provided with a memory, a control circuit and a blade grinding and a controlling software module. During the operation, the original parameter is firstly input; then a blade grinding and controlling software module is automatically setting up by the system to generate a processing program, make error analysis and machining simulation; and finally a blade actual grinding processing is carried out. The turbine blade numerical control belt grinder is a five-axis and four-linkage numerical control belt grinder, and has the advantages of high efficiency, good accuracy, simple structure, low cost, and convenient control.

The invention provides a human-computer identification method based on a sliding trajectory, belongs to the technical field of computers and is used for solving the problem of low accuracy when a human-computer identification method simulates a sliding trajectory input by a user in the prior art. The method comprises the following steps that: determining the preset dimension feature coding of a historical sliding trajectory which is qualified, and the reference distribution feature of the feature coding of a historical sliding trajectory on the basis of at least one time window; determining the preset dimension feature coding of a real-time sliding trajectory to be verified, and the distribution feature to be verification of the feature coding of a historical sliding trajectory on the basis of at least one time window; and if the distribution feature to be verification on the basis of a certain time window is not matched with the reference distribution feature, determining that the real-time sliding trajectory to be verified is a machine simulation sliding trajectory. By use of the method disclosed by the embodiment of the invention, accuracy for identifying the machine simulationsliding trajectory can be effectively improved.

An embodiment of the invention provides a verification method and device. The method includes: acquiring user verification data which are generated by user behaviors; generating machine verification data through machine simulation according to the user verification data, wherein the machine verification data are used for representation of verification data generated by machine behaviors; taking the user verification data as a positive sample and the machine verification data as a negative sample to generate a user verification behavior model through machine learning, wherein the user verification behavior model is used for judging whether verification requests are user behaviors or machine behaviors.

The invention discloses an atrial fibrillation catheter ablation simulator based on a three-dimensional electroanatomic mapping system (CARTO), which comprises a work station, a sheathing canal measuring device, a catheter measuring device and a force feedback device, an ablation catheter, an ablation catheter movement guide rail, a first display, a second display, a third display, a fourth display, an X-ray machine control panel, a point accessing pedal plate, a point deleting pedal plate, a discharge pedal plate, a perspective pedal plate, a movie storage pedal plate and the like, wherein the work station is internally provided with three-dimensional mapping simulation software, polygraph simulation software, catheter ablation operation simulation software and X-ray machine simulation software, and the sheathing canal measuring device, the catheter measuring device and the force feedback device are respectively connected with the work station through serial ports. The simulator completely simulates the three-dimensional electroanatomic mapping system, so that a doctor achieves the purpose of mastering the atrial fibrillation catheter ablation based on the CARTO system by operating the simulator.

A method determines an engagement surface between a tool and a workpiece during a simulation of a machining of the workpiece by a relative motion between the object and the tool. A set of points is arranged on at least a part of a surface of the tool. A distance between each point in the set of points and a surface of the workpiece modified by the motion is determined and the engagement surface is formed based on a subset of points having the distance below a threshold.

The invention discloses a remote monitoring method and system for full-range analog machines of a nuclear power station. The system comprises a client side (100) and a nuclear power station full-range analog machine server (200). The client side (100) is used for establishing a nuclear power station analog machine simulation interface view which is identical to the project file organizational structure of a nuclear power station full-range analog machine to be monitored on the basis of SimDV software, and extracting the parameter variables of the system frames of all analog systems under the simulation interface view. The client side (100) is further used for sending selected monitoring parameters to the nuclear power station full-range analog machine server (200) after the selected monitoring parameters are written in a datagram format. The nuclear power station full-range analog machine server (200) is used for extracting the monitoring parameters in a datagram, searching for the real-time values of the monitoring parameters, and sending the real-time values back to the client side (100) after the real-time values are written in the datagram format. The client side (100) is further used for extracting the real-time values of the monitoring parameters in the datagram, and displaying the real-time values of the monitoring parameters.

Embodiments of the invention disclose a method for optimizing a simulation of a machining of a workpiece performed by removing a set of swept volumes from a volume of the workpiece, wherein the volume is partitioned into a set of cells, comprising the steps of: associating with each cell a subset of distance fields representing a subset of swept volumes intersecting with the cell, wherein at least part of the subset of swept volumes forms a composite surface of the cell; subjecting the cell with a set of rays incident to the cell from at least one direction; and selecting a distance field of the subset of distance fields into an optimal subset associated with the cell, wherein a boundary of the swept volume represented by the distance field intersects with at least one ray at a point of intersection lying on the composite surface.

The invention discloses a track-based man-machine recognition method for sliding verification codes. The method comprises the following steps of: acquiring track data of a user; constructing a multi-dimensional feature system according to the track data; and carrying out track differentiation on the multi-dimensional feature system according to a designed man-machine recognition model. According to the method, the multi-dimensional feature system is designed by combining two phenomena of human tracks, and features are used for describing sliding verification code habits of users, so that useroperations and machine simulations are differentiated, advantages are provided in confront with black product tools of attackers, and a relatively good confront protection effect is provided.

A training system uses a mechanical mock-up with electrically conductive probe points connected to electronically readable memories, and a simulated diagnostic tool to interface with a system or machine simulation for the purpose of operation, maintenance or procedure training. When a probe of a simulated diagnostic tool comes into contact with a probe point of the mechanical mock-up, the electronically readable memory supplies a unique identifier code that is communicated by the simulated diagnostic tool to the simulation to indicate the contact of the probe with the corresponding probe point. Complex wiring connections between the mechanical mock-up and a computer that runs the simulation are eliminated and construction of the training system is significantly simplified.

The invention discloses a UG-based propeller overall numerical control machining method. The method comprises the following steps: for various kinds of propellers, carrying out modeling in UG NX; carrying out editing through a UG CAM processing module to generate a machining tool path trajectory; translating the tool path trajectory generated by the UG CAM processing module into NC codes, which can be identified and used directly by a CNC machine tool, through a VC++ programming postprocessor; carrying out machine tool modeling through VERICUT software, and then, inputting the generated NC codes into the software for machining simulation verification to check whether the phenomenon of undercutting, overcutting and interference and the like exist; and finally, carrying out cutting speed optimization through an OptiPath module of the VERICUT software, so that the machining speed is optimized by adding speed codes to the original codes on the premise of not changing the NC machining codes.

A numerical control apparatus can perform a machining simulation or an interference check that reflects worksite information. However, a machining simulation apparatus cannot use worksite information in a machining simulation or an interference check. Thus, simulation conditions of the machining simulation apparatus are different from those of the numerical control apparatus. To solve this problem, a machining simulation apparatus and a numerical control apparatus according to the present invention can communicate with each other via a communication unit or a storage medium so as to mutually transmit and receive data. The machining simulation apparatus includes a network transmission/reception control unit or an external memory reading/writing unit. Similarly, the numerical control apparatus includes a network transmission/reception control unit or an external memory reading/writing unit.

The invention discloses a track traffic safety shielding door simulation test system, which comprises a simulation shielding door structure platform and a simulation control system, wherein the simulation control system comprises a signal simulation system, a central control unit simulation system, a door control simulation system and a monitoring system, a door machine simulation system is arranged in the simulation shielding door structure platform, the signal simulation system, the door control simulation system and the monitoring system are respectively in signal connection with the central control unit simulation system, and in addition, the door control simulation system is provided with a plurality of door control unit simulation systems. The track traffic safety shielding door simulation test system has the advantages that under a design scheme of the whole conception, the simulated recurrence on the control, communication, mechanical design, engineering management and the like of a platform safety shielding door is respectively realized, in addition, for all simulation tests, except the safety shielding door structure part is simplified, the rest parts adopt components identical to those of the safety shielding door, the simulation efficiency and the simulation accuracy are improved, in addition, the problems generated in the installing process of the safety shielding door can be really simulated, and some difficult problems of engineering can be effectively solved.

The invention provides a numerical control elbow machining simulation method which comprises the steps of establishing a geometric model of a numerical control tube bending machine; establishing a mechanical model of the numerical control tube bending machine according to the geometric model, wherein the mechanical model is a mathematical equation including the motion feature information of the numerical control tube bending machine; establishing an allocation model including the performance parameter information of the numerical control tube bending machine; establishing a mechanism kinematics model including the positions and postures of the numerical control tube bending machine according to the mechanical model and the allocation model; solving the mechanism kinematics model to determine the positions and the postures of the numerical control tube bending machine in a machining process; simulating a numerical control tube bending machining process according to the positions and the postures of the numerical control tube bending machine in the machining process and the data control information of elbows to be machined. According to the technical scheme, the modeling process is simple, the generality of motion laws and characteristics of the performance parameters of the numerical control tube bending machine can be described, and thus high generality is achieved.

The invention provides a generating method of a general cutter scanning body in five-axis machining. Firstly, a section line of a cutter is expressed in a unified mode on mathematics according to the Nurbs curve technology, then an analytic expression mode of the surface of the cutter scanning body is obtained through the establishment of an instant coordinate system which changes dynamically along with the scanning motion of the cutter, then an analytic expression of a characteristic curve is solved through the enveloping principle, and finally, a complete cutter scanning body model is solved through the Nurbs curve fitting technology and the Boolean operation. Compared with a model generated through NX machining simulation, the cutter scanning body generated through the generating method of the general cutter scanning body in five-axis machining is more accurate.