51 results about "Mathematical simulation" patented technology

The invention relates to the technical field of cloud computing, and discloses a data processing method and system based on cloud computing, and the method comprises the steps: dividing a cloud computing system into a data storage unit, a computing resource scheduling unit and a task distribution unit, determining the parameters of each unit, carrying out the modeling, constructing a distributed mathematical simulation model, and solving to obtain an initial simulation result. By establishing a dynamic programming model and a genetic algorithm model, computing resource scheduling and task allocation are optimized respectively, and a data redundancy strategy and a fragmentation rule are determined at the same time. The minimum system total energy consumption, the minimum task average time delay or the maximum resource utilization rate serves as a global optimization objective function, and the convergence condition is judged to optimize system configuration. According to the method, the data storage reliability, resource scheduling reasonability and task allocation efficiency of the cloud computing system are effectively improved, global optimization of the system is realized, and the method has a good application prospect.

The invention discloses a steam turbine high-pressure control valve fault detection method based on an improved attention mechanism, and the method comprises the steps: generating a fault data set for training through building a mathematical simulation model of a steam turbine control system and various fault models of a high-pressure control valve; the short-term data with the high sampling frequency and the long-term data with the low sampling frequency are spliced into a mixed sequence, short-term and long-term data features are extracted by adopting a multi-scale attention mechanism, and system operation features under different time scales are fused; and acquiring context representation of each time point through a multi-head attention mechanism, and outputting a fault type prediction result of the time point by using a full connection layer and a softmax function. Through the method, the abnormal state of the high control valve of the steam turbine is detected, and a new technical means is provided for fault detection and prevention of a power system.

The invention discloses a visual compensation alignment method and system for a special-shaped screen, and belongs to the technical field of image processing, and the method comprises the steps: obtaining physical geometric parameters of the special-shaped screen, carrying out the mathematical simulation, and generating a physical perception deviation map; receiving a content image, performing multi-scale semantic analysis, and generating a content perception joint constraint tensor; constructing and iteratively solving an energy function, and generating an optimal visual compensation flow field; performing nonlinear distortion and reconstruction, and outputting a pre-compensated content image; and performing sub-pixel-level processing through the flexible edge mixed mask, and outputting a final display picture. According to the method, a joint optimization strategy fusing a screen physical perception model and content semantic analysis is adopted, the key visual content can be intelligently protected while the physical fidelity is maximized, and seamless and high-fidelity fusion of a display picture and a special-shaped screen physical form is achieved.

The invention discloses a shallow natural gas displacement mathematical simulation method. Comprising the following steps that a shallow natural gas displacement mathematical model is established, the shallow natural gas displacement mathematical model is imported into COMSOL Multiphysics software, parameter processing of the shallow natural gas displacement solving process is carried out, definite solution conditions are set, parameters of different influence factors serve as variables to design multiple sets of simulation schemes, and according to the research content and characteristics of shallow natural gas, the parameters of the shallow natural gas displacement solving process are calculated. And on the basis of COMSOL Multiphysics software, a research mode and a solver are selected to solve each group of simulation schemes, and result analysis is carried out. According to the method, on the basis of a mathematical model, COMSOL Multiphysics multi-physics coupling software is adopted, the whole evolution process of non-coal measure stratum shallow natural gas displacement is simulated, performance parameters such as the influence range and the displacement time of shallow natural gas displacement are analyzed, and the performance of the non-coal measure stratum shallow natural gas displacement is improved. The factors may influence the displacement performance, such as pumping and drainage negative pressure, gas injection pressure, stratum permeability, drilling hole diameter, displacement position burial depth and the like.

The invention provides a simulation verification method for a flood discharge atomization physical model, which comprises the following steps: performing numerical simulation on the flood discharge atomization physical model by using an LBM model or an LES model, outputting a first simulation result, and extracting first droplet particle size distribution from a far field region; based on the geometrical characteristic parameters, experimental conditions and fluid physical parameters of the experimental device, mathematical simulation is carried out by adopting an Eulerian multiphase flow model and second numerical simulation software, a second simulation result is output, second droplet particle size distribution is generated from a far-field region, and the experimental device and the model meet a geometrical similarity ratio; and calculating a normalized deviation value of the particle size distribution of the first liquid drop and the particle size distribution of the second liquid drop, and if the value is less than a preset threshold value of 0.05-0.15, determining that verification is passed. The reliability and accuracy of the model can be improved, and a scientific basis is provided for optimizing flood discharge design and reducing atomization hazards.

According to the real-time path planning method for the arm end mechanism of the humanoid robot, all joints of the mechanical arm of the humanoid robot can be controlled to rotate through path planning, and therefore the purpose that the end executing mechanism of the humanoid robot reaches the designated position is accurately achieved. According to the algorithm, a target point which a robot end execution mechanism needs to reach, an iteration stopping distance and a stopping number in iteration are determined according to engineering requirements, the L2 norm of a target position posture and a current position posture error is minimized through a Newton-Euler method, and the optimal position at the next moment and the corresponding iteration joint angle are solved. And through repeated iterative calculation, the tail-section executing mechanism of the mechanical arm can reach the target point accurately finally. The target passes mathematical simulation verification, and finally, when the tail end of the mechanical arm reaches the target point through planning, the position error reaches the order of magnitude of 1e-10m, and the high-precision planning effect is displayed. The algorithm planning precision is high, and the method has a good application prospect.

The application discloses a kind of gamma irradiation medium modules, including irradiation container and the several medium modules being arranged in irradiation container, irradiation container and medium module are cuboid structure;The length and height of single medium module are slightly less than the length and height of irradiation container one third respectively, the width of single medium module is slightly less than the width of irradiation container;The number of all medium modules=the number of medium module in full load in irradiation container * irradiation station number, irradiation station is used to place irradiation container;A dose field test and analysis method for gamma irradiation medium module is also disclosed.The application clearly medium module in irradiation container in loading mode and related parameters such as radiation safety, clearly irradiation device dose field is carried out mathematical simulation, the establishment of OQ dose field test coordinate system, dose meter is laid out mesh and point, the analysis use method of actual measurement dose data, provides proof data and technical basis, effectively improves core technical ability and quality assurance ability.

The present invention discloses a navigation signal simulation method based on time delay and power controllability. The method includes: Step S1, performing position calculation on the visible satellite system based on a given receiver device to obtain the baseband observables of the visible satellite signals and the visible motion state of the given receiver device; Step S2, calculating the spoofing range Δρ based on the visible motion state of the given receiver device; Step S3, using the baseband observables of the visible satellite signals and the spoofing range Δρ as input variables to input into a mathematical simulation software for simulation to obtain a simulated spoofing signal; Step S4, inputting the spoofing signal into the given receiver device; Step S5, verifying a preset spoofing scheme by comparing the visible motion state of the given receiver device with the visible motion state in the spoofing scenario. The present invention can generate spoofing signals of different dimensions under different spoofing paths. The simulation scheme has a high degree of flexibility, is convenient, and can verify the simulation results in real time.

The invention specifically discloses a relative orbit dynamics multi-dimensional ground simulation method using a ducted fan, and relates to the technical field of spacecraft ground simulation. According to the method, a ducted fan compensation platform is designed, the ducted fan compensation platform comprises a ducted fan, a main structure frame and a fan driving unit, the ducted fan compensation platform is integrally fixed to the air floatation simulator, and the method comprises the specific steps that a target spacecraft reference coordinate system and a simulator body coordinate system are established, and a space-time scaling model is determined; a simulator pose is obtained in real time through a pose measurement system; starting a jet system to generate relative displacement, and inversely calculating an actual space relative distance and a nonlinear acceleration by combining a C-W equation and a space-time scaling model; the ducted fan is controlled to provide xoy plane nonlinear compensation force, and z-axis direction compensation force is calculated through mathematical simulation coupling. The problem that a traditional air floating platform cannot simulate the dynamic characteristics and multi-dimensional motion of a spacecraft orbit is solved, and the precision of a spacecraft ground simulation test is remarkably improved.

The invention relates to a GNSS (Global Navigation Satellite System) multimode co-frequency and analog forwarding device, which comprises a remote / local control module for controlling the switching between a co-frequency forwarding mode and an analog forwarding mode; the satellite signal monitoring and receiving module is used for receiving a real satellite navigation signal and performing navigation and positioning; the simulation control module is used for providing parameters required for simulating real navigation based on the real satellite navigation signal; the mathematical simulation module is used for generating satellite observation data and original navigation messages according to the parameters required for simulating the real navigation; the data processing module is used for preprocessing satellite observation data and original navigation messages; and the satellite signal generation module is used for generating a final simulation satellite navigation signal according to the preprocessed satellite observation data and the original navigation message. According to the invention, quasi-seamless connection positioning can be realized indoors and outdoors or under the condition of satellite navigation signal rejection.

The invention relates to a method for predicting and planning an attitude pointing sun-avoiding maneuvering path, which is used for solving the problem of planning an attitude maneuvering path of a spacecraft with attitude pointing constraint. The method comprises two steps of maneuver prediction and attitude maneuver, if it is predicted that a conventional maneuver path can enable a pointing shaft to enter a prohibited area before attitude maneuver, a proper middle attitude is selected, a spacecraft is made to maneuver towards the middle attitude firstly, then the spacecraft is selected to maneuver towards a target attitude, and therefore a new maneuver path capable of avoiding the prohibited area is planned. Finally, the feasibility of the method is effectively proved through mathematical simulation analysis. According to the technical scheme, an effective and feasible method is provided for preventing the pointing shaft from entering the sun prohibited area in the attitude maneuver process.

The invention provides a microwave photon module performance management method based on a knowledge graph. The method comprises the following steps: establishing a performance index knowledge graph of groups / devices forming a microwave photon module; establishing a knowledge graph of the microwave photon module signal flow graph; establishing a performance index mathematical simulation model of the microwave photon module; when the performance index of any group / device is changed, calling the performance index mathematical simulation model to respectively calculate model outputs before and after the change of the performance index, and if the model output corresponding to the changed performance index is not inferior to the model output corresponding to the performance index before the change; and if not, updating the performance index knowledge graph of the corresponding group / device and updating the knowledge graph of the signal flow graph. According to the method, the consulting efficiency of the signal flow and performance index range of the microwave photon module and the performance index range of the internal group / device is effectively improved, the evaluation difficulty of the change influence range and degree in the full life cycle of the performance index range of the module and the internal group / device is reduced, and the evaluation accuracy and efficiency are improved.

The present invention discloses a method for determining the slope reduction rate range of the inlet of the lower horizontal tunnel of a swirling vertical shaft based on numerical simulation, belonging to the technical field of hydrodynamic mathematical simulation for urban flood control and drainage. First, an index representing the magnitude of slope reduction is proposed: the slope reduction rate. Since the reasonable value range of the unknown slope reduction rate is not known, different slope reduction rates can be set, and the reservoir water level H and the outlet velocity v of the slope reduction at each operating condition are extracted. Then, the relationship curves of water level ~ slope reduction rate and energy dissipation rate ~ slope reduction rate are established. By referring to the curve charts, the reasonable slope reduction rate range is determined. Finally, slope reduction rate values within the range are randomly selected for simulation calculation, and the calculation results are compared with the results obtained from chart query to verify the feasibility of the reasonable slope reduction rate range. The present invention can not only stabilize the flow pattern of water with a large discharge slope ratio and high velocity flowing through the lower horizontal tunnel, but also ensure smooth ventilation at the top of the lower horizontal tunnel, avoiding the "blocked tunnel" of mountain floods.

The present invention proposes a GNSS simulator mathematical simulation system, which includes a constellation satellite orbit and clock parameter simulation subsystem, a navigation message generation subsystem, a user trajectory simulation subsystem, an integrity simulation subsystem, a space environment effect simulation subsystem and a simulation data generation subsystem for data interaction; the constellation satellite orbit and clock parameter simulation subsystem is composed of a space-time system model, an auxiliary database, satellite theoretical orbit data, and satellite clock theoretical parameters; the space-time system model has a built-in time system model and a coordinate system model, and the auxiliary database has built-in astronomical constants and environmental parameter values in the constellation satellite orbit and clock parameter simulation; the satellite theoretical orbit data calculates gravitational acceleration based on the input initial time, initial position velocity, integration time, and model selection control parameter data, and then uses the satellite motion equation to perform numerical integration operations on it to obtain the constellation satellite motion orbit.

Disclosed is a system including a computing hardware for processing input data defining parameters describing a population and a pathogen affecting or potentially affecting the population, wherein the computing hardware is configured to apply a mathematical simulation model to the 5 input data to generate output data providing a forecast indicative of an effect of the pathogen on the population, wherein the mathematical simulation model is configured to use at least a Susceptible-Infected- Recovered model (SIR model), characterized in that the system is configured initially to apply the SIR model to an historical part of the input 10 data to generate an initial iteration of the output data, and then to train the SIR model during a training period on a recently-acquired part of the input data to improve an accuracy of the SIR model when generating a subsequent iteration of the output data.

The application discloses a consciousness numerical simulation driven digital human interaction system and method based on quantum computing characteristics, and relates to the fields of quantum artificial intelligence and digital human interaction.The system comprises a quantum computing processing module, a consciousness numerical generation module, a multi-modal linkage control module and an industrial-grade service support module; high-dimensional quantum characteristics are extracted through parameterized quantum circuits to calculate and generate consciousness strength values simulated purely by mathematics; the consciousness strength values drive 3D digital human animation, speech synthesis and dialogue strategies in real time to realize dynamic, continuous and autonomously evolving interactive performance.The application does not generate real consciousness and has no ethical risks, and at the same time, has high-availability industrial-grade capabilities such as distributed caching, data persistence, user authentication, order payment and background autonomous training, and can be directly commercialized and deployed.The application solves the technical problems of single performance of traditional digital humans and difficulty in engineering and landing of quantum AI, and is suitable for virtual digital humans, intelligent interaction, commercial display and enterprise-level service scenarios.

The present application relates to the technical field of power quality disturbance classification, and particularly relates to a power quality disturbance classification method based on multi-channel separable convolution.The technical scheme comprises the following steps: a power quality disturbance mathematical simulation model is established, Gaussian white noise is added to the disturbance signal to obtain a noisy power quality disturbance signal S; the decomposition scale K and the penalty factor alpha of variational mode decomposition are optimized by using a particle swarm algorithm, the power quality disturbance signal is decomposed by using an improved variational mode decomposition model to obtain multiple intrinsic mode components; the Pearson correlation coefficient is calculated to set a threshold to screen the intrinsic mode components.The present application avoids the interference of redundant modes on classification, generates multi-channel image data in combination with a Markov transition field, retains the dynamic characteristics of the components, uses a multi-channel separable convolution residual network based on weight sharing for classification and identification, makes up for the shortcomings of traditional single-channel identification, and improves the classification accuracy.

The present invention provides a method for automatically constructing a mathematical simulation software framework for an aircraft, belonging to the technical field of system simulation, and comprising the following steps: S1: encapsulate each discipline model and store the information in a model library; S2: read a graphical simulation process description file; S3: perform DTD constraint verification on the file; if the file is invalid, execute S13; if it is valid, execute S4; S4: parse the file; S5: connect to the model library, if the connection fails, execute S13; if the connection is successful, execute S6; S6: obtain the information parsed in S3 from the model library; S7: check whether the input and output match; S8: if the connection rules are not met, execute S13; if they are met, execute S9; S9: determine the execution order of each model; S10: generate a basic simulation program framework; S11: add call codes for model initialization functions; S12: add call codes for model running functions to obtain a mathematical simulation software, solving the problem of slow framework construction speed in the prior art.

The invention discloses a semi-physical rotor unmanned aerial vehicle simulation system driven by a digital simulation engine. The semi-physical rotor unmanned aerial vehicle simulation system comprises a ground rotor unmanned aerial vehicle platform and a digital simulation deduction platform, the ground rotor unmanned aerial vehicle platform is used for hardware simulation of rotor unmanned aerial vehicle airborne equipment and actual physical simulation of an attitude control model; the digital simulation deduction platform comprises a simulation computer and display and man-machine interaction equipment; and the simulation computer performs two-way data transmission with the rotor unmanned aerial vehicle through the wireless serial port antenna. Compared with a traditional unmanned aerial vehicle semi-physical simulation system and method, a digital simulation deduction platform is combined with a ground multi-rotor unmanned aerial vehicle platform supporting unmanned aerial vehicle three-axis autonomous motion; according to the method, mathematical simulation of unmanned aerial vehicle path optimization and a motion control algorithm, hardware simulation of airborne equipment such as a flight controller, an airborne sensor and an execution mechanism and actual physical simulation of an attitude control model can be realized at the same time, so that the fidelity of ground simulation of the rotor unmanned aerial vehicle is improved.

The present invention provides a method for simulating dynamic controlled wireless field signals for satellite communication and navigation, and relates to the field of satellite simulation test technology. The software and hardware environment on which the present invention relies includes a three-dimensional multi-antenna array in a satellite navigation darkroom, a plurality of independent satellite communication and navigation signal simulation basebands corresponding to each antenna array element, and mathematical simulation software for simulating satellite communication and navigation constellation signals; the present invention is based on a three-dimensional multi-antenna array, and adopts a method of combining mathematical simulation with dynamic instantaneous switching of channels to enable satellite signals to move relatively smoothly between antenna array elements, thereby ensuring that the signals received by the receiver in the dynamic controlled wireless field are consistent in direction, highly realistic, and uninterrupted compared to the signals in the real external environment. The present invention breaks through the difficulties in dynamic signal simulation of controlled wireless fields for satellite communication and navigation signals, and establishes a complete set of construction models, providing a methodological basis and practical guidance for future satellite navigation and communication and navigation fusion testing under low-orbit enhancement.

The invention discloses a ship motion simulation method based on multiple full-rotation power systems. The ship motion simulation method comprises the steps that S1, real-time longitude and latitude data of a ship are acquired; s2, acquiring a current distance between the current center position and a preset reference center point position in a preset virtual scene; s3, judging whether the current distance exceeds a preset maximum distance threshold value or not, and if the current distance is determined to be greater than the preset maximum distance threshold value, continuing to execute the step S3; s3, acquiring ship body offset data based on the constructed global offset strategy; s4, the current full-rotation rudder angle of the ship is obtained, full-rotation engine dynamic calculation is conducted on the basis of the multiple full-rotation power systems, and then ship full-rotation engine actual data of all the ships are obtained; and S5, acquiring ship translation simulation data and ship rotation simulation data based on the ship body offset data according to actual data of the ship full-rotation engine, and further realizing analogue simulation of ship motion. The problems that a computational fluid mechanics mode is mainly used for mathematical simulation of the full-rotation type ship at present, the computational fluid mechanics mode is high in calculation precision but complex in calculation, and real-time simulation calculation cannot be achieved are solved.

The invention discloses a breathing waveform simulation method which comprises the steps that S1, a mathematical simulation model of breathing waveforms is constructed, and the breathing waveforms comprise mechanical ventilation waveforms and auxiliary ventilation waveforms; s2, obtaining a to-be-displayed case, and obtaining initial breathing state information of a patient; s3, acquiring a breathing mode instruction of a target user based on the initial breathing state information, and determining a target breathing waveform under the current breathing mode instruction based on a mapping relation between a breathing mode and a breathing waveform; and S4, acquiring a patient breathing parameter instruction and a breathing machine parameter instruction of a target user, and executing the mathematical simulation model of the target breathing waveform, so that simulation of breathing waveform states and changes of different case patients in a breathing machine mode is realized, and medical students can better understand different breathing machine waveforms and master a breathing machine technology.

The invention discloses a modular modeling system and method suitable for a sewage treatment mathematical model, and the construction method divides a sewage treatment mathematical simulation process into three parts: a biochemical process matrix model used for storing and displaying the biochemical process matrix model; the data set is used for storing and displaying the sewage treatment process; and the model solution module is used for combining the biochemical process matrix model and the data set, and storing and displaying the combined biochemical process matrix model and data set. According to the method, the use cost and the learning threshold of the sewage treatment mathematical model can be reduced, the popularity and reliability of the model and the reusability of data are improved, implicit errors are reduced, the modeling efficiency is improved, and the method can be widely applied to the technical field of data processing.

The invention relates to the technical field of computer vision, in particular to a moire attack method based on mathematical simulation and gradient optimization. The method comprises the following steps: S1, collecting search image data through a sensor, and carrying out preprocessing operation on the collected search image data; s2, based on the search image data of the preprocessing operation, obtaining an arrangement pixel image through a screen pixel arrangement simulation pipeline; and S3, based on the arrangement pixel image obtained in the S2, acquiring an imaging filtering pipeline through a camera to obtain recovered image data, and iteratively optimizing sensor noise disturbance through projection gradient descent. According to the method, the Moore effect generated by pixel arrangement difference and Bayer filter filtering when a mobile phone, a camera and other devices shoot a screen is accurately simulated based on various existing screen pixel arrangements on the market by constructing a double-pipeline system to simulate and simulate an image acquisition and imaging whole process.

The present invention proposes a GNSS simulator radio frequency hardware simulation system, which mainly includes a signal generating subsystem, a control subsystem, a self-marking subsystem, a time-frequency subsystem, an intermediate frequency chassis, a radio frequency chassis, a time-frequency chassis, a test chassis and other parts. The signal generating subsystem includes a digital signal processing unit, a radio frequency signal generating unit and a power division network and other parts, which directly outputs 42 radio frequency signals (including 30 multipath signals) for one user and conforms to the spatial signal characteristics, and requires that the power imbalance of the 42 radio frequency signals is less than 0.2dB. The control subsystem includes an Ethernet card, a transmitting memory network card and corresponding hardware and software platforms, which control the signal generating subsystem so that it acts according to the instructions of the real-time data, control and management and test and evaluation subsystems of the mathematical simulation, and controls the time-frequency subsystem to switch the internal and external frequency references.

The invention discloses a numerical simulation-based mine pit water inflow prediction method, which comprises the following steps of: firstly, constructing a hydrogeological conceptual model of a research area, and determining the range and boundary conditions of the research area, a hydrogeological structure, hydrogeological parameters and groundwater supply and drainage items; establishing a three-dimensional unsteady flow underground water flow numerical model by adopting underground water simulation software GMS, carrying out space-time discrete processing on the model, and configuring initial conditions at the same time; performing parameter identification and effect verification on the underground water flow numerical model by using field water pumping test data and hydrogeological parameters, so that a model calculation result is consistent with an actual hydrogeological condition; and finally, based on the verified underground water flow numerical model, calculating and outputting a mine pit water inflow prediction result. According to the method, the water inflow of the mining area is predicted through the software program GMS applied to underground water flow mathematical simulation, and then guarantee is provided for safe production of the mining area.

The invention particularly relates to an integral event-triggered hovering control method for an underwater vehicle, which comprises the following steps of: defining a coordinate system required by modeling, defining a state variable and control input, and performing reasonable assumption simplification according to characteristics of hovering maneuver; establishing four-degree-of-freedom dynamics and kinematics equations for hovering in a vertical plane; defining a nominal system for AUV hovering, and designing an optimization problem and a cost function of MPC; an integral type event triggering mechanism is introduced, and specific integral type event triggering conditions are designed; analyzing the upper and lower bounds of the trigger time of the designed trigger condition, and proving; and the performance of the designed controller is verified through mathematical simulation. According to the method, consumption of computing resources during hovering control of the AUV can be reduced, so that stable hovering control is realized while the state constraint of the AUV and the mixed integer constraint of the VBS are met.

The application discloses a kind of shallow natural gas displacement mathematical simulation methods, comprising the following steps: establishing shallow natural gas displacement mathematical model, shallow natural gas displacement mathematical model is imported into COMSOL Multiphysics software and is carried out shallow natural gas displacement parameter processing and setting solution condition of solution process, the parameters of different influencing factors are designed as variable design multiple groups of simulation schemes, according to the research content and characteristics of shallow natural gas, based on COMSOL Multiphysics software, each simulation scheme is solved by selecting research mode and solver, and result analysis is carried out.The application is based on mathematical model, using COMSOL Multiphysics multi-physical field coupling software, simulates the whole process of non-coal formation shallow natural gas displacement evolution, analyzes the influence range, displacement time and other performance parameters of shallow natural gas displacement, and the factors such as pumping negative pressure, gas injection pressure, formation permeability, borehole diameter, displacement horizon depth, which may affect displacement performance.

The application discloses a silicon-based liquid crystal device phase modulation method, equipment, medium and product, relates to the technical field of silicon-based liquid crystal spatial light modulation, and the method comprises the following steps: determining the grating period length of a target deflection angle; determining the number of pixels in a unit blazed period according to the grating period length and the pixel electrode size of the silicon-based liquid crystal device; constructing a mathematical simulation model corresponding to a periodic initial equal-phase difference stepped phase topography; superimposing a plurality of discrete harmonic components on the mathematical simulation model to obtain a stepped blazed grating topography superimposed with the discrete harmonic components; performing parameter matching optimization on the stepped blazed grating topography superimposed with the discrete harmonic components according to a set parameter range based on the diffraction order energy distribution to obtain an optimized stepped blazed grating topography; and using the optimized stepped blazed grating topography to modulate incident light of the silicon-based liquid crystal device. The application can effectively improve the main energy level diffraction efficiency of the silicon-based liquid crystal device and reduce other level stray light components.