30results about How to "Avoid emulation" patented technology

The invention provides a vehicle-mounted bus simulation model self-generating method and system. According to the vehicle-mounted bus simulation model self-generating method and system, a full-simulation or semi-physical simulation model is generated based on vehicle data information; and CANoe software-based simulation model or test model automatic generation is realized through steps such as electronic control module attribute definition, bus behavior logic strategy database entry and bus database file loading, and therefore, bus behavior full-simulation and bus semi-physical test environment construction can be realized. The system has the advantages of simple and convenient operation, fast script generation, stable performance, excellent operation, high extensibility and high flexibility. The system is provided with a comprehensive and extensible logical database and is suitable for all kinds of model detection of passenger vehicles; and the system is provided with an expert experience library, so that performance evaluation can be completed through direct or indirect information read service relationships.

The invention relates to a frequency comprehensive device behavior level modeling method considering noise source affect, belonging to the technical field of wireless transmission communication. In order to improve the traditional behavior level modeling method carried out for a sigma-delta fraction N frequency comprehensive device in the prior art, the method provided by the invention comprises the steps of: modeling a phaselocked loop system of the sigma-delta fraction N frequency comprehensive device with jitter noise; and modeling a sigma-delta demodulator. The technical scheme of the invention greatly helps a designer design a circuit, and is convenient for early estimating the influence of the phase noise of the frequency comprehensive device to the whole wireless communication system. The invention can ensure that a circuit designer carries out the rapid simulation to obtain system performances, especially noise performance, thereby avoiding using simulators of SPICE, SpectraRF and the like with very low speed for simulation. The invention can be used for accelerating the design process of the sigma-delta fraction N frequency comprehensive device from top to bottom so as to ensure that the designer accurately predicts the system performances as early as possible, especially indexes of the phase noise and the like.

The invention discloses a double-step Monte Carlo simulation method applied to radioactive ray dose computation. The double-step Monte Carlo simulation method comprises the following steps: step 1, performing Monte Carlo simulation, thereby acquiring valid seed numerical array; step 2, after acquiring the valid seed numerical array in the step 1, by utilizing valid seed numerical values, performing secondary Monte Carlo simulation and computing radioactive ray dose distribution inside the human body at a high speed. The invention provides a double-step Monte Carlo simulation algorithm; simulation of photons acted on a tumor region according to the valid seed numerical values can be performed, and simulation of photons without passing through the tumor region is avoided, so that computational efficiency is improved.

The invention belongs to the technical field of wind power and particularly relates to an online positioning method for subsynchronous oscillation initiated by VSC access. The invention proposes a parallel filter method to approximately measure and obtain a wind farm in a closed loop power system and an open loop residue of a residual AC system, and an oscillation source is determined according tothe magnitude of a judgment index (square) root Rv1Rac1. According to the method, the positioning of the oscillation source in the wind farm can be achieved, the time-consuming simulation and the disassembly of the device are avoided, the steady-state operating point of a system is not changed, and the credibility of a result is improved. The method has the advantages of small required amount ofcalculation, fast calculation result, and low resource occupation. In addition, the method achieves a high accuracy of judgment based on a small amount of data, and a wind turbine or a wind farm can be accurately positioned without performing range inspection.

The method for verifying the chip of the system-on-chip comprises the following steps: establishing a part library comprising an interface protocol part, a bus protocol part and a verification part; creating a control file to control the verification platform, wherein the control file comprises control parameters; according to verification requirements, a software library used for running of all processors of the system-on-chip chip is established, an excitation library used for corresponding assemblies in the assembly library is established, the software library comprises execution software of all the processors, and the excitation library comprises a generator capable of sending out excitation of all the universal interface protocols; based on the verification demand and the control file, establishing a script library comprising a plurality of script files, the script library comprising a verification platform control file analysis script; under the condition that the verification scene is determined, the script analyzes a control file of the verification platform to obtain a control parameter of the verification platform; according to the control parameters, required parts are selected from a part library, and required excitation is selected from an excitation library to generate a verification platform; and verifying the system-on-chip chip through the verification platform.

The invention discloses a method for correcting an error of a polarization detection device. The polarization detection device comprises a phase retarder, an analyzer and a photoelectric detector which are sequentially arranged along an optical axis of the device system, wherein the output of the photoelectric detector is connected with a signal processing system; and the linearly polarized light with the Stokes parameter of (1, 1, 0, 0) enters the polarization detection device. The method comprises the following steps of: setting the angle of a transparent shaft of the analyzer to be 0 and performing measurement for the first time to obtain a first measurement error of the normalized Stokes parameter; setting the angle of the transparent shaft of the analyzer to be 45 degrees and performing measurement for the second time to obtain a second measurement error of the normalized Stokes parameter; and solving the phase retardation error of the phase retarder, the fast axis angle error and the transparent shaft angle error of the analyzer in the polarization detection device so as to realize error correction. According to the method, the device error in the polarization detection device can be measured under the condition that the polarization detection device does not need to be detached, so that the device error is corrected.

The invention discloses a unit quick selection method of an opportunity array antenna and solves the problem that existing opportunity array antenna units are difficult to be selected quickly. The unit quick selection method includes: setting parameters; determining beam width: determining half-power beam width through unit simulation; randomly selecting an antenna unit, and setting an initial value; performing outside-unit normal vector solving to serve as an antenna radiation direction; calculating an included angle between the maximum radiation direction and a beam pointing direction, wherein the included angle is taken as a selection basis; judging whether to select for comparison or not, and calculating the included angle within a range being half of the half-power beam width to meetrequirements of the selection antenna unit; judging whether search is completed or not: detecting whether all antenna units are already searched or not; completing antenna unit selection to quickly acquire a proper antenna unit. A radiation unit is accurately and quickly selected under a given scanning angle by combining with an antenna unit radiation direction diagram, efficient and effective unit selection is realized, and the unit quick selection method is used for the field of radar and detection by utilizing antennas.

The invention discloses a relay protection teaching experiment emulation platform and an emulation method thereof. The relay protection teaching experiment emulation platform comprises a host computer, a universal real-time emulator UREP, an Ethernet switch, a relay protection device and a power box, wherein the host computer is connected with the universal real-time emulator UREP through the Ethernet switch; the AO port of the universal real-time emulator UREP is connected with the power box; and the power box and the DI port of the universal real-time emulator UREP are connected with the relay protection device. By adopting the relay protection teaching experiment emulation platform disclosed by the invention, simple software emulation is avoided, meanwhile, the teaching experiment costis reduced, in addition, experiment operators can join in development and utilization of the relay protection device in the teaching experiment process, and the knowledge application capability and the innovation consciousness of the experiment operators are greatly promoted.

The invention provides an optimal design method of a free-form surface lens for beam shaping of a pumping laser system. According to the method, based on comprehensive application of data collected bya light beam quality analyzer and functions of a Tracepro software surface light source generator, an analog simulation light source is established and is infinitely close to the real characteristicsof a pumping laser light source, so that errors introduced during subsequent analog simulation and optimization design of the polarization state of laser and a light beam shaping system (a free-formsurface lens and a collimating lens) can be avoided while analog simulation of a pumping laser system is realized; and the functions of a Scheme macro language in Tracepro software and an optimizationengine After-scheme macro language are comprehensively used, and an optimization channel is established by taking optimization variables (control points of the free-form surface lens) as a bridge, sothat automatic optimization design of the free-form surface lens can be realized, and troubles and a complex calculation process of importing and exporting a model are avoided.

The invention relates to the pure electric vehicle performance estimation field, to be specific, relates to an electric vehicle traction motor power verification method. The electric vehicle traction motor power verification method comprises a, highest speed power estimation; b, maximum gradient driving power estimation; c, 100km / h accelerating condition power estimation; d, extremum acquisition. The electric vehicle traction motor power verification method has advantages of simple process and reasonable result.

The invention relates to the technical field of three-pin automatic impedance matching, in particular to a rapid three-pin automatic impedance matching system. The rapid three-pin automatic impedancematching system comprises the following steps: 1) establishing a three-pin waveguide equivalent circuit; 2) establishing a circuit parameter relationship; 3) matching algorithm design. According to the method, the mathematical relationship among the reflection coefficient, the load impedance, the pin depth and the S parameter of the three-pin waveguide is directly established, the scattering parameter and the load impedance can be rapidly solved according to the reflection coefficient and the pin depth, and then rapid impedance matching calculation is achieved. On the basis of an equivalent circuit method and numerical calculation, the calculation amount can be greatly reduced, the design process of automatic impedance matching is simplified, a database is not needed, and the method can bewidely applied to pin waveguides of different sizes.

The invention provides a power grid simulation training system based on monitoring signal simulation. According to the power grid simulation training system, a power system simulation module providesa power system model, a relay protection function and a simulation function of power system automatic device equipment; a control center simulation module simulates the same system environment as an actual scheduling control center and has the functions of real-time alarm window signal monitoring, alarm signal classification management and integrated control permission management; a teacher systemmodule provides the functions of formulation of teaching plans, management of the teaching plans, starting and exiting of training, operation of comprehensive orders, fault setting and training evaluation; a monitoring signal simulation module triggers monitoring signals sent to a main station on a simulated transformer substation, and the monitoring signals comprise transformer substation equipment fault signals, abnormal transformer substation equipment signals and transformer substation secondary-equipment online monitoring and analysis signals, so that alarm window simulation signals arereal. The system can effectively improve the efficiency of training the professional skills of power grid monitors, shorten the training cycle and improve the training quality.

The invention provides a closed loop analysis method and system for a USB high speed signal. The closed loop analysis method includes: establishing a USB signal test frame, using a USB signal test tool to perform test according to the test frame, acquiring an actual measurement eye diagram; acquiring a USB signal topological structure, and acquiring a simulation eye diagram according to the USB signal topological structure; comparing if the actual measurement eye diagram and the simulation eye diagram coincide with each other or not, and showing that a transmission device may meet the speed demand of a USB 3.2 if so; otherwire, showing that the transmission device cannot meet the speed demand of the USB 3.2. According to the method, simulation and test are performed on a USB 3.2 high speedsignal, simulation and actual test are combined, a closed loop is formed, and then the situation that in the conventional USB analysis, simulation and test are separated from each other can be avoided; combination between simulation and actual test can effectively perform USB signal analysis, and can verify if the transmission device can meet the speed demand of the USB 3.2 or not; and analysis and comparison are performed in an eye diagram format, and a visual effect can be achieved.

The invention discloses a performance analysis method for an unmanned aerial vehicle relay system based on spatial modulation, and the method comprises the steps: building a system model that the system passes through a Rician channel under the condition of no direct link for the unmanned aerial vehicle relay system based on spatial modulation; according to the definition of a joint boundary, dividing the bit error rate of a system into three different error conditions, giving a calculation method of the joint boundary of the bit error rate of the system according to a probability density function and a cumulative distribution function of channel information, and further giving a calculation method of an approximate bit error rate joint boundary of the system under a high signal-to-noise ratio; according to the approximate bit error rate joint boundary of the system under the high signal-to-noise ratio, giving the diversity degree of the system. Through simulation verification, the performance analysis method provided by the invention can effectively evaluate the bit error rate performance of the system.

The invention discloses a simulation system applicable to an IC equipment workpiece positioning motion stage and a modeling method. The method comprises steps as follows: obtaining component models of base components of the motion stage, classifying the component models according to subject fields, and establishing a component-level multi-field model base; selecting component models from the component-level multi-field model base to establish a function-module-level model base; selecting models in the function-module-level model base to establish a system-level model; inspecting the system-level model, and if no error exists, setting model parameters to finish modeling of the motion stage simulation system. The system comprises the component-level multi-field model base, the function-module-level model base, the system-level model, a model compiling and simulating module and an output module. The component-level multi-field model base, the function-module-level model base and the system-level model are established in a unified MWorks modeling environment on the basis of Modelica modeling language. The modeling method is high in applicability, high in modeling efficiency and capable of effectively solving the problem of multi-field coupling.

The invention provides a method for optimizing an additional magnetic field pattern of a plasma vortex driving device. According to the method, an analytical functional relationship between specific additional magnetic field distribution and heat dissipation distribution is established, the influence of the distribution characteristics of the additional magnetic field on the heat dissipation distribution can be rapidly and accurately analyzed, a large number of repeated experiments or numerical simulation is avoided, and a large number of time and material resources are saved. According to theoptimized additional magnetic field type obtained through the optimization method, joule heat dissipation on the surface of the cathode of the vortex driving device can be reduced by 19%, and viscousheat dissipation can be reduced by 68%.

The invention provides a feed-forward control method, a feed-forward industrial personal computer and a system for sliding steerable drilling, and the method comprises the steps: building a multi-body dynamic segmentation model of a sliding steerable drilling system according to well track design parameters inputted by a user; according to historical actual drilling data, stratum parameters in the dynamic segmentation model are updated; according to the drilled trajectory parameters and the borehole trajectory design parameters, deflection parameters of the target trajectory are obtained through calculation; a drilling process is simulated according to the BHA multi-body dynamic model and the deflection parameters of the target trajectory, and target shooting is carried out to obtain segmented point target control quantity; a balance process is simulated according to the drill rod multi-body dynamic model and the segmented point target control quantity, and a drilling machine feedforward control quantity is obtained through targeting; the drilling machine feedforward control quantity is sent to a drilling machine controller; and judging whether the drilled distance reaches the expected length or not, and if not, returning to continue to execute updating of the stratum parameters and the following steps. According to the invention, accurate, real-time and efficient sliding guide automatic drilling can be realized.

The electronic data processing circuit targets the emulation of a logic function. The circuit includes a single clock providing time unit signals, a programmable synchronous logic array for processing values on a time unit basis, detection of internal or external value state changes known as events, programmer for state changes or event signals, processor for a series of scheduled times providing the logic array with scheduled time signals depending on the signals from the detection or the event programmer and the signals from the clock. The processor can determine subsequent scheduled times having delayed deadlines programmed by the programmer, depending on the signals from the detection or the programmer. The processing performed by the logic array is thus dependent on the series of scheduled times triggered by internal or external value state changes and by determination of the series of scheduled times.

The invention provides a vehicle-mounted bus simulation model self-generating method and system. According to the vehicle-mounted bus simulation model self-generating method and system, a full-simulation or semi-physical simulation model is generated based on vehicle data information; and CANoe software-based simulation model or test model automatic generation is realized through steps such as electronic control module attribute definition, bus behavior logic strategy database entry and bus database file loading, and therefore, bus behavior full-simulation and bus semi-physical test environment construction can be realized. The system has the advantages of simple and convenient operation, fast script generation, stable performance, excellent operation, high extensibility and high flexibility. The system is provided with a comprehensive and extensible logical database and is suitable for all kinds of model detection of passenger vehicles; and the system is provided with an expert experience library, so that performance evaluation can be completed through direct or indirect information read service relationships.

The invention relates to a frequency comprehensive device behavior level modeling method considering noise source affect, belonging to the technical field of wireless transmission communication. In order to improve the traditional behavior level modeling method carried out for a sigma-delta fraction N frequency comprehensive device in the prior art, the method provided by the invention comprises the steps of: modeling a phaselocked loop system of the sigma-delta fraction N frequency comprehensive device with jitter noise; and modeling a sigma-delta demodulator. The technical scheme of the invention greatly helps a designer design a circuit, and is convenient for early estimating the influence of the phase noise of the frequency comprehensive device to the whole wireless communication system. The invention can ensure that a circuit designer carries out the rapid simulation to obtain system performances, especially noise performance, thereby avoiding using simulators of SPICE, SpectraRFand the like with very low speed for simulation. The invention can be used for accelerating the design process of the sigma-delta fraction N frequency comprehensive device from top to bottom so as toensure that the designer accurately predicts the system performances as early as possible, especially indexes of the phase noise and the like.

The invention discloses a method for obtaining an equivalent model and parameters of a power element based on a field-circuit combination, which is characterized in that the method comprises the following steps: Step 1, obtaining structural and dimensional parameters of the power element; Step 2, in the ANSYS three-dimensional simulation software,establishing the three-dimensional structure of thepower element model; Step 3, applying a low-voltage traveling wave test to the three-dimensional structure model of Step 2 to obtain a unit step response of the power element; Step 4, providing the qualitative equivalent circuit model of the power element according to the connection structure of the power element and other elements; Step 5, according to the principle that the qualitative circuitmodel obtained in step Step 4 coincides with the unit step response of the power element, determining the parameters of the qualitative circuit model of the power element. The invention effectively solves the problem that the simulation results caused by the previous power element model and the empirical parameters are quite different from the actual ones in the prior art.

The invention provides a method for optimizing an additional magnetic field pattern of a plasma vortex driving device. According to the method, an analytical functional relationship between specific additional magnetic field distribution and heat dissipation distribution is established, the influence of the distribution characteristics of the additional magnetic field on the heat dissipation distribution can be rapidly and accurately analyzed, a large number of repeated experiments or numerical simulation is avoided, and a large number of time and material resources are saved. According to theoptimized additional magnetic field type obtained through the optimization method, joule heat dissipation on the surface of the cathode of the vortex driving device can be reduced by 19%, and viscousheat dissipation can be reduced by 68%.

The invention discloses a method for designing a DCMFK (Debiased Converted Measurement Kalman filter) based on an FPGA (Field Programmable Gate Array). Firstly, a system of the DCMFK based on the FPGA is designed. A gain matrix module comprises an average real covariance submodule and a gain matrix submodule; a state update module comprises a coordinate transformation submodule, an average real deviation submodule, an innovation submodule and a state update submodule; a trigonometric function module, a one-step prediction module, a prediction error covariance module, a filter error covariance module, the average real covariance submodule, the gain matrix submodule, the coordinate transformation submodule, the average real deviation submodule, the innovation submodule and the state update submodule respectively invoke floating adding, subtracting, multiplying and dividing operation modules. A hierarchical design is adopted in the method, modules at the bottom layer realize input by utilizing a VHDL (Very High Speed Integrated Circuit Hardware Description Language), and a schematic diagram input manner is adopted by the modules on the top layer; therefore, the method can improve the readability of codes, is easy to divide modules, and is convenient to simulate during designing.

The invention discloses a unit quick selection method of an opportunity array antenna and solves the problem that existing opportunity array antenna units are difficult to be selected quickly. The unit quick selection method includes: setting parameters; determining beam width: determining half-power beam width through unit simulation; randomly selecting an antenna unit, and setting an initial value; performing outside-unit normal vector solving to serve as an antenna radiation direction; calculating an included angle between the maximum radiation direction and a beam pointing direction, wherein the included angle is taken as a selection basis; judging whether to select for comparison or not, and calculating the included angle within a range being half of the half-power beam width to meetrequirements of the selection antenna unit; judging whether search is completed or not: detecting whether all antenna units are already searched or not; completing antenna unit selection to quickly acquire a proper antenna unit. A radiation unit is accurately and quickly selected under a given scanning angle by combining with an antenna unit radiation direction diagram, efficient and effective unit selection is realized, and the unit quick selection method is used for the field of radar and detection by utilizing antennas.

The invention relates to the technical field of three-pin automatic impedance matching, in particular to a fast three-pin automatic impedance matching system. The fast three-pin automatic impedance matching system includes the following steps: 1) establishing a three-pin waveguide equivalent circuit; 2) establishing a circuit parameter relationship; 3) designing a matching algorithm. The invention directly establishes the mathematical relationship among the reflection coefficient, load impedance, pin depth and S parameter of the three-pin waveguide, and can quickly calculate the scattering parameter and load impedance according to the reflection coefficient and the pin depth, thereby realizing fast impedance matching calculation. Based on the equivalent circuit method and numerical calculation, the invention can greatly reduce the amount of computation, simplify the design process of automatic impedance matching, does not require a database, and can be widely used in pin waveguides of different sizes.

The invention discloses a simulation system applicable to an IC equipment workpiece positioning motion stage and a modeling method. The method comprises steps as follows: obtaining component models of base components of the motion stage, classifying the component models according to subject fields, and establishing a component-level multi-field model base; selecting component models from the component-level multi-field model base to establish a function-module-level model base; selecting models in the function-module-level model base to establish a system-level model; inspecting the system-level model, and if no error exists, setting model parameters to finish modeling of the motion stage simulation system. The system comprises the component-level multi-field model base, the function-module-level model base, the system-level model, a model compiling and simulating module and an output module. The component-level multi-field model base, the function-module-level model base and the system-level model are established in a unified MWorks modeling environment on the basis of Modelica modeling language. The modeling method is high in applicability, high in modeling efficiency and capable of effectively solving the problem of multi-field coupling.

The invention discloses a method for correcting an error of a polarization detection device. The polarization detection device comprises a phase retarder, an analyzer and a photoelectric detector which are sequentially arranged along an optical axis of the device system, wherein the output of the photoelectric detector is connected with a signal processing system; and the linearly polarized light with the Stokes parameter of (1, 1, 0, 0) enters the polarization detection device. The method comprises the following steps of: setting the angle of a transparent shaft of the analyzer to be 0 and performing measurement for the first time to obtain a first measurement error of the normalized Stokes parameter; setting the angle of the transparent shaft of the analyzer to be 45 degrees and performing measurement for the second time to obtain a second measurement error of the normalized Stokes parameter; and solving the phase retardation error of the phase retarder, the fast axis angle error and the transparent shaft angle error of the analyzer in the polarization detection device so as to realize error correction. According to the method, the device error in the polarization detection device can be measured under the condition that the polarization detection device does not need to be detached, so that the device error is corrected.

The invention discloses a double-step Monte Carlo simulation method applied to radioactive ray dose computation. The double-step Monte Carlo simulation method comprises the following steps: step 1, performing Monte Carlo simulation, thereby acquiring valid seed numerical array; step 2, after acquiring the valid seed numerical array in the step 1, by utilizing valid seed numerical values, performing secondary Monte Carlo simulation and computing radioactive ray dose distribution inside the human body at a high speed. The invention provides a double-step Monte Carlo simulation algorithm; simulation of photons acted on a tumor region according to the valid seed numerical values can be performed, and simulation of photons without passing through the tumor region is avoided, so that computational efficiency is improved.

The present invention belongs to the automation test field, relates to the automation test technology aiming at aircraft airborne embedded software, and relates to a construction method of a script-based embedded software simulation and test integrated platform. Implementation of the construction method is based on configuration of a real-time processor and a main control computer. In the main control computer, test cases and simulation models are described by using test scripts, anomaly detection is also carried out, and the scripts which are tested to be correct are sent down to the real-time processor. In the real-time processor, simulation of external crosslinking devices and a test device of a to-be-tested device is implemented on basis of the scripts. The external crosslinking devices are simulated by the simulation model scripts, and the test device is simulated by the test case scripts. The simulation model scripts and the test case scripts are parsed by a real-time script interpreter, all simulation and test tasks are added to a task register and scheduling module, and finally interaction with the to-be-tested device is implemented through a bus driving module.