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64 results about "Performance design" patented technology

Variable-cycle wide-area engine turbine design method and system

The invention relates to the technical field of engine turbines, and discloses a variable-cycle wide-range engine turbine design method and system.The method comprises the steps that according to preset engine overall performance design requirements, conversion flow, conversion rotating speed and conversion power of multiple different working states are calculated and analyzed; judging whether the conversion flows and the conversion rotating speeds in the different working states meet the equal condition or not; if yes, designing based on a preset conventional turbine design method; if different weight coefficients are not given to the working states, generating design state parameters of the turbine based on the linear weighted sum; according to the design state parameters and the conversion power, at least one of one-dimensional parameter design, two-dimensional parameter design and three-dimensional parameter design of the engine turbine is carried out, so that the engine turbine meets the preset overall performance design requirement of the engine, the efficiency is high in different working states, the flow and power requirements of all working conditions are met, and the working efficiency is improved. And the reliability of the variable cycle engine turbine design method is verified.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST

Sliding bearing multi-mode end-to-end intelligent design system based on large model

The invention relates to the technical field of sliding bearing design in mechanical engineering, in particular to a sliding bearing multi-mode end-to-end intelligent design system based on a large model. Comprising a multi-modal input and feature recognition module, a high-fidelity performance prediction module, a structural parameter intelligent optimization decision module and a parametric modeling and multi-modal output module which are connected in sequence and form an intelligent design closed loop, and all the modules are seamlessly connected through data interfaces. According to the method, multi-modal input and a high-fidelity simulation closed loop are driven through a large language model, the sliding bearing design efficiency is remarkably improved, the technical threshold is greatly reduced, interaction between a natural language and a drawing is supported, and non-experts can complete high-performance design; full-process automation from requirements to drawings is achieved, and manual intervention errors are avoided; optimizing in a wide-area parameter space by using the large model reasoning capability to realize multi-target global optimization; and multi-modal input and output of texts, drawings and models are supported, and the engineering applicability is enhanced.
Owner:BEIHANG UNIV

Partition wall structure integrated refined modeling and simulation method based on physical reality

The invention relates to the technical field of building structure engineering, in particular to a partition wall structure integrated refined modeling and simulation method based on physical reality. A complete and closed technical chain from refined physical modeling to connection and failure linkage algorithm definition and then to whole-process nonlinear simulation to finally realize automatic multi-target parameter optimization is constructed, and'work-damage-failure-influence 'full-life-cycle behaviors of a partition wall subsystem are subjected to full-process nonlinear simulation, so that the whole-life-cycle behavior of the partition wall subsystem is optimized. A rigorous mathematical model and a numerical algorithm are integrated into the performance design of the whole structure, a special design system which is highly innovative, computable and verifiable is formed, and therefore quantitative and performance design of the damping connection structure is completed. By introducing a series of mathematical models, criteria and linkage algorithms with clear physical significance, the black box experience of traditional'cycle reduction coefficient 'is improved.
Owner:SICHUAN PROVINCIAL ARCHITECTURAL DESIGN & RES INST

A design method for limiter support vibration isolation structure

The present invention relates to the technical field of building vibration reduction technology, and discloses a design method for a limiter support vibration isolation structure, comprising the following steps: S1, designing the placement position of the vibration isolation layer; S2, determining the seismic performance targets of the upper and lower buildings, and determining the seismic performance levels of the lower building, the vibration isolation layer, and the upper building; S3, designing the limiting state of the limiter support under different earthquakes; S4, performing model envelope calculations on the horizontal stiffness and vertical stiffness combination of the overall structure according to different earthquakes, and obtaining the force data and relative displacement data of each structure; S5, performing structural design of the limiter support, and performing finite element analysis on the limiter support using the above data; S6, performing performance design on the upper and lower buildings. The present invention provides a design method for a limiter support vibration isolation structure, which can calculate the force data and relative displacement data of each structure under various special conditions, and ensure that the design results are reliable.
Owner:GUANGZHOU METRO DESIGN & RES INST CO LTD

Construction of wind driven generator gearbox sliding bearing digital twinborn model based on multi-physics field coupling

The invention relates to the field of digital twinning modeling methods for key parts of wind power generation equipment, in particular to construction of a digital twinning model of a sliding bearing of a gearbox of a wind power generator based on multi-physics field coupling, comprising the following steps: S1, establishing a laser cladding manufacturing sub-model; s2, establishing a mixed bomb flow pressure lubrication sub-model; s3, establishing a wear sub-model; s4, constructing a sliding bearing design-manufacturing-operation digital twinborn model based on a multi-physics field theory, and performing model calibration by utilizing actual measurement data of an experiment table; according to the method, the digital twinborn model for the sliding bearing of the wind power gear box is finally established by constructing the digital twinborn model of'design-manufacturing-operation 'and accurately calibrating the digital twinborn model, and theoretical support and optimization guidance are provided for high-performance design and manufacturing of the sliding bearing of a wind turbine generator.
Owner:HUNAN UNIV

A method for optimizing the structure of a fin ray effect gripper

The present application belongs to the technical field of flexible robots, and relates to a structure optimization method of a fin ray effect gripper, comprising the following steps: step 1: a co-rotation modeling method is used to construct a force-deformation relationship model of the fin ray effect gripper as a fast evaluation model of the performance of the gripper; step 2: structure optimization design parameters and multi-objective performance evaluation indexes of the fin ray effect gripper are determined; step 3: based on a Bayesian optimization algorithm, the fast evaluation model is combined to construct a multi-objective structure optimization framework, global optimal sample search is performed on the design parameters, and a Pareto front is solved; and step 4: experimental verification is performed on typical optimal parameter combinations in the Pareto front, and optimal structure parameters of the gripper suitable for different gripping scenes are output. The present application can be applied to the design and optimization of flexible, rigid and rigid-flexible hybrid robot compliant mechanisms, and can be widely applied to the high-performance design and parameter tuning of gripper structures in industrial gripping, service robots, precision operation and the like.
Owner:ZHEJIANG UNIV

A multi-source random response collaborative gas turbine performance robust design method

PendingCN122286979ARisk levelNormal density
This invention discloses a robust design method for gas turbine performance based on multi-source stochastic response coordination, relating to the field of gas turbine performance design. The method sequentially performs three types of stochastic influence analysis: design model, manufacturing, and usage process, constructing probability density functions for core performance parameters respectively. Based on the task phase, it determines the risk levels and weights of various stochastic factors, fusing them to generate a comprehensive probability density function. With the goal of minimizing the dispersion and optimizing the expected value of the comprehensive probability density function, it combines the constraints of component thermodynamic state parameters to solve the optimization model, obtaining the optimal combination of performance parameters. This invention achieves multi-source stochastic coordinated quantification and characterization, improving the robustness of gas turbine performance, solving the problems of conservative design and poor adaptability to operating conditions in traditional methods, and enhancing its operational safety and reliability.
Owner:SHANGHAI JIAOTONG UNIV

A dynamic load static equivalent coefficient determination method and a structural parameter design method

ActiveCN119503151BMachine part testingGeometric CADScale modelDynamic strength
The application belongs to the field of aircraft structure dynamic strength design, and particularly relates to a dynamic load static equivalent coefficient determination method and a structure parameter design method, which comprises the following steps: S1: according to a water ditching dynamic load measurement test, a relationship curve between a water pressure load of a bottom of an aircraft fuselage and a time history is obtained, and a peak value Ps of the water pressure load is determined according to the relationship curve; S2: a water ditching test of an elastic model of the bottom of the fuselage is performed to determine a critical failure parameter of the elastic structure; S3: a static mechanical property test is performed with the critical failure parameter of the elastic structure to obtain a maximum static pressure Pd that can be borne by the elastic structure; and S4: a water ditching dynamic load static equivalent coefficient is calculated. The static equivalent coefficient of the water ditching water pressure dynamic load is obtained through a scale model test. The application aims to solve the problem of lacking of design load in aircraft water ditching performance design.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

An artificial intelligence-based electromagnetic performance design method and system for laminated structural materials

The present invention discloses an artificial intelligence-based electromagnetic performance design method and system for laminated structural materials, which relates to the field of artificial intelligence technology. The method includes obtaining basic electromagnetic parameters of ply units through experiments, encoding ply units with different electromagnetic absorption properties, and generating random codes for ply configurations based on time dependence. Using electromagnetic simulation software, a simulation database of random codes for ply configurations and corresponding electromagnetic absorption properties is established. The simulation database is used to train a proxy model for predicting electromagnetic absorption performance under different ply configurations to obtain a prediction model. The prediction model is used to predict the electromagnetic absorption performance of candidate ply configurations, determine whether the electromagnetic absorption performance of the candidate ply configuration is optimal, and if so, determine that the candidate ply configuration is the optimal ply configuration. This method solves the problems faced by electromagnetic absorption materials, such as the difficulty and high cost of searching a large parameter space composed of ply units and material types.
Owner:NAT UNIV OF DEFENSE TECH

Multi-core CPU parallel acceleration parameterization horizontal heat collection conduction topological optimization method based on implicit identification and Flood Fill algorithm

The invention belongs to the technical field of high-performance design of high-precision advanced engineering structures, and discloses a multi-core CPU parallel acceleration parameterization horizontal heat collection conduction topological optimization method and system based on implicit identification and a Flood Fill algorithm. The invention aims to solve thermal management challenges in industries such as semiconductor manufacturing and the like and the defects of a traditional design method in the aspects of time consumption of grid division, isolated structure generation, slow convergence speed and the like. According to the method, a symbol distance field is automatically constructed through an implicit identification model, a tip isolated structure is eliminated in combination with a Flood Fill algorithm, convergence of a globally optimal solution is accelerated by adopting a multi-stage volume relaxation strategy, and integration of thermal performance evaluation and parameter updating is realized based on parallel sensitivity analysis. A numerical experiment of a radiator structure verifies that the framework is excellent in global optimal approximation and calculation efficiency, and has a wide engineering application prospect.
Owner:HUAZHONG UNIV OF SCI & TECH

Method and system for designing maximum voyage cruise mode of subsonic aircraft

The invention belongs to the technical field of aircraft performance design, and particularly relates to a method and system for designing a maximum voyage cruise mode of a subsonic aircraft, and the method comprises the steps: firstly obtaining a lift coefficient of maximum voyage cruise based on the characteristics of cruise performance and a lift-drag ratio rule at a given speed; then, the Mach number of maximum-voyage cruise is obtained based on the law of aerodynamic characteristics and oil consumption characteristics; and finally, the cruise weight and the atmosphere model are introduced to obtain the optimal cruise height of the maximum voyage cruise, so that the change strategy of the cruise height of the aircraft under different weight conditions is obtained. According to the scheme, the cruise factor is used as an analysis tool, and the maximum voyage cruise modes, including the cruise height, the cruise speed and the lift coefficient, of the subsonic jet aircraft under different weight conditions are constructed. In the model construction process, the method fully considers the balance between the precision requirement of data and the calculation complexity, so that the accuracy of the result is ensured, and the excessive complex calculation process is avoided.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

Preparation method of polarization maintaining optical fiber preform and product

The invention belongs to the related field of optical communication transmission technology, and discloses a preparation method of a polarization maintaining optical fiber preform, which comprises the following process steps of: firstly, respectively preparing components including a core rod, a stress rod and a sleeve according to performance design requirements of polarization maintaining optical fibers; the sleeve and a center hole of the sleeve are machined for the first time, and the difference between the inner diameter of the sleeve and the outer diameter of the core rod is controlled to meet the preset specification; secondly, secondary machining is conducted on the casing pipe, and positioning and drilling are conducted so that a plurality of stress holes can be independently formed in the casing pipe in the axial direction; and finally, the core rod is assembled into the middle hole of the sleeve, and the stress rods are assembled into the stress holes of the sleeve. The invention also discloses a corresponding polarization maintaining optical fiber preform and an optical fiber product. According to the invention, the core rod can be prevented from being influenced by internal stress generated during drilling vibration, the technical problem that various polarization maintaining optical fiber preforms are easy to crack is effectively solved, and the quality controllability and the production efficiency are remarkably improved.
Owner:YANGTZE OPTICAL FIBRE & CABLE CO LTD

Shaft cutting head slag accumulation bin slag discharge optimization design method and system

PendingCN122287273ASlagComputational model
This invention discloses a method and system for optimizing the slag discharge design of a vertical shaft cutting head slag bin, belonging to the technical field of underground coal mine transportation equipment. The method is based on a Python script framework and includes an automatic modeling module, an automatic simulation module, and a data analysis and parameter optimization module. The automatic modeling module performs model verification and efficient automatic modeling of the slag bin structure; the automatic simulation module automatically performs mesh generation and boundary configuration on the modeling results and calls simulation software to run multiphysics simulations; the data analysis and parameter optimization module captures the slag discharge indicators of interest from the simulation results and calculates the slag discharge performance of the model, introducing a Bayesian optimization model for iterative optimization, achieving convergence of the structural parameters of the slag bin structure to the optimal structural parameters with the fewest simulations. This invention features high integration and strong automation, constructs a closed-loop optimization mechanism, breaks through the bottlenecks of existing design processes, and improves the efficiency and quality of structural performance design.
Owner:ZHEJIANG UNIV +1

Damping structure simplified design system

The invention provides a simplified design system for a damping structure. Non-damping structure data calculated through a vibration mode decomposition reaction spectrum method can be obtained through a data importing and preprocessing module; performing calculation and CQC correction on a displacement spectrum according to the obtained acceleration response spectrum through an anti-seismic standard response spectrum calculation module to obtain a displacement spectrum corresponding to the equivalent single-degree-of-freedom system; the performance curve generation module is used for generating a performance curve graph of the system ductility coefficient relative to the rigidity ratio, identifying an optimal performance design point, and generating a damper design scheme according to the number of dampers in each layer; the parameters of the damper are calculated layer by layer according to a preset additional rigidity distribution strategy through a multi-degree-of-freedom system design module, and the matching degree of the deformation capacity of the damper and the interlayer displacement angle requirement is verified; and parameter output and visual display of each layer of damper are realized through a result output and visual module, so that rapid estimation of damper parameters is realized, and preliminary design of a damping structure is completed.
Owner:ZHONGCHUAN NO 9 DESIGN & RES INST

A badminton racket rod structure and a production process thereof

The present application belongs to the technical field of badminton racket, and particularly relates to a badminton racket rod structure and a production process thereof. The present application adopts a combination scheme of a radial three-layer differentiated composite structure and an axial gradient performance design. From inside to outside in the radial direction, a reinforcing framework layer, a middle functional layer and an outer reinforcing layer are arranged, and each layer respectively undertakes the core functions of torsion resistance and shock absorption, rigid and tough balance and rigid enhancement. Different weaves and ply angle designs are matched to realize performance partition customization of different regions of the racket rod, so that the contradiction that rigidity and shock resistance cannot be considered together is solved.

Cylindrical FPSO design method and device suitable for trunk tree oil extraction system, medium and equipment

The invention discloses a cylindrical FPSO design method suitable for a dry tree oil extraction system. The method comprises the following steps that a ship body is designed; designing a main scale; designing an oil extraction moon pool system; motion performance design; designing a positioning system; and subdivision design. The method can be used for guiding the design of the dry tree cylindrical FPSO with the functions of well drilling, oil extraction, oil storage, oil unloading and the like, the investment of one floating facility can be reduced, the safety in the crude oil production, storage and output process is guaranteed, the development requirement of the deepwater isolated oil field is better met, and economic development of the deepwater isolated oil field is achieved.
Owner:CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1

A design method of a wraparound brake mechanism

PendingCN122287264ABrakeControl engineering
This invention relates to the field of mechanical structure design technology, and in particular to a design method for a ring-shaped braking mechanism. The method includes: using the physical structure of the ring-shaped braking mechanism as a design reference, setting an initial radial clearance matching the design operating conditions, and collecting measured data of the design benchmark throughout the entire process of assembly locking, clearance elimination, and braking operation; establishing an auxiliary design verification method adapted to brake performance design verification and adapting and debugging the auxiliary design verification method; loading in stages according to the actual working sequence, collecting relevant data of the auxiliary design verification, and performing closed-loop iterative verification with the measured data of the design benchmark to finally obtain the finalized design scheme of the ring-shaped braking mechanism. This invention effectively solves the technical problems of long cycle and high cost in traditional design modes, and insufficient accuracy and large deviation in design results of conventional auxiliary design methods, achieving high-precision and efficient design, and providing reliable support for the research, development, design, and engineering verification of ring-shaped braking mechanisms.
Owner:冈田精机(常州)有限公司

Evaluation Method for Concrete Structure Performance of Existing Nuclear Safety-related Buildings

The present invention discloses a method for evaluating the concrete structure performance of existing nuclear safety-related plants, which includes the following steps: (1) Divide the existing nuclear safety-related plants into structural areas with different seismic requirements based on the failure safety risk of the plants, and formulate different structural review standard requirements; (2) Conduct durability evaluation and strength analysis on the plants to determine the current mechanical properties and load-bearing capacity of the structural components of the existing plants; (3) Determine the numerical calculation model of the existing nuclear safety-related plants, apply load effects to the model, and then conduct performance simulation calculations; (4) Macroscopically evaluate the overall seismic performance of the existing nuclear safety-related plants according to the results of the performance simulation calculations. The method in the present invention maximally applies the concept of structural performance design, enabling the existing plants to continue to be put into use as much as possible, and playing a promoting role in improving the structural design technology of nuclear safety-related plants. This method is technologically advanced, safe and reliable, and simple to implement.
Owner:CHINA NUCLEAR POWER ENGINEERING CO LTD

Electric vehicle high-pressure heater, performance design method and performance test method

The invention relates to a high-pressure heater for an electric vehicle and a performance design method and a performance test method, the high-pressure heater comprises long wave turbulence ribs and short wave turbulence ribs, and a slope-shaped area with a gradually-reduced sectional area is arranged in a water channel of the high-pressure heater so as to increase the water flow speed. According to the high-pressure heater performance design method, target parameters are determined according to performance design indexes, an optimization thought is provided for structural design of the high-pressure heater, and the method comprises performance definition of the high-pressure heater, acquisition of input parameters and calculation of heat efficiency. The high-pressure heater performance test method comprises the following steps: building a test bench; setting parameters; connecting low-voltage communication control equipment; recording data by using an upper computer and Tsmaster software; and outputting a heater product performance report. The invention has the following positive effects: the cooling liquid is promoted to turn continuously, uniform heating is realized, and the heat conduction effect of a heat source is enhanced; the design of the heater product is guided and optimized, and the performance test method can accurately output specific performance parameters of the heater product.
Owner:SOUTH CHINA UNIV OF TECH +1

Design method for flame-retardant performance of optical cable and flame-retardant air-blowing micro cable

The invention relates to an optical cable flame-retardant performance design method and a flame-retardant gas-blowing micro cable, the optical cable flame-retardant performance design method adopts a layer-stranded full-dry structure, the core is that the overall flame-retardant performance of an optical cable is ensured through a quantitative model, and the model comprehensively considers each element of the optical cable. The number and the size of the outer sheath, the loose tube, the central reinforcing piece and the like and the key performance index of the used flame-retardant material are improved. Meanwhile, the mechanical rigidity of the optical cable is optimized by setting the lower limit of the load ratio of the central reinforcer. According to the method, a whole set of quantitative design criteria from performance prediction, structural design to rigid control is provided for the flame-retardant gas-blowing micro-cable for the first time, the design process is converted from experience-dependent trial and error into predictable and optimizable accurate calculation, the industrial problem that high flame-retardant performance and excellent gas-blowing laying performance are difficult to consider at the same time is fundamentally solved, and the method is suitable for popularization and application of the flame-retardant gas-blowing micro-cable. And a series of products meeting requirements of different grades can be guided to be developed.
Owner:FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO LTD

A Multi-Performance Coordination Design Method for Planetary Roller Screws

This invention relates to a multi-performance coordinated design method for planetary roller screws, belonging to the field of planetary roller screw technology. It includes the following steps: Step 1, establishing a calculation model for the thread engagement point slip ratio and maximum von Mises stress based on the kinematics and load distribution model of the planetary roller screw; Step 2, establishing equal and unequal structural constraints based on the correct meshing, non-interference, and contact boundary conditions of the planetary roller screw; Step 3, establishing a multi-performance optimization design model for the planetary roller screw based on the optimization objective and constraints; Step 4, using a multi-objective genetic algorithm to solve the multi-performance design model of the planetary roller screw, obtaining the Pareto front and corresponding structural design parameters; Step 5, obtaining the Pareto front range that satisfies the given limit trade-off cost. Based on the Euclidean norm and minimizing the dimensionless distance, the optimal trade-off solution and corresponding structural design parameters are obtained.
Owner:SICHUAN UNIV

Load-carrying voyage model research method of transport aircraft

The invention belongs to the technical field of aircraft performance design, and particularly relates to a load range model research method for a transport aircraft, which comprises the following steps of: firstly, constructing a weight parameter model for aircraft load range evaluation by combining a typical mission profile according to the maximum takeoff weight of a transport aircraft and aircraft weight statistical data; then developing a flight distance performance model for load range evaluation based on the specific range parameter of each task section of the transport plane; and finally, inputting data of different load conditions of the transport aircraft by taking the load voyage calculation model as a carrier, and calculating a corresponding voyage result and an operation efficiency result. In this way, construction of a transport aircraft load range model and evaluation of a load range result are achieved. Through an overall weight model, a mission profile model and a flight performance model of the transport aircraft, a set of mathematical relationship between key design parameters and core capability indexes of the transport aircraft is established, and the mathematical relationship is used for evaluating voyage and operation efficiency results under different load conditions. The method is visual and clear, and the calculation process is convenient.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

Disposable load transportation unmanned aerial vehicle

The invention belongs to the field of aircrafts, in particular to a disposable load transportation unmanned aerial vehicle, and aims at solving the problem that the existing transportation unmanned aerial vehicle technology lacks overall and performance design under the low-cost and assembly condition in a war area environment, the following scheme is provided: the disposable load transportation unmanned aerial vehicle comprises a fuselage, an equipment cabin is arranged in the fuselage, and a power system is arranged at the head of the fuselage; the power system comprises a propeller arranged at the head of the fuselage, and a direct-current brushless motor used for driving the propeller to rotate is arranged in the fuselage. According to the unmanned aerial vehicle, low-cost materials and foldable design are adopted, the manufacturing, transporting and deploying cost is reduced, the unmanned aerial vehicle becomes an economical and efficient choice, the system design is simple, and the unmanned aerial vehicle is suitable for popularization and application. Operators can quickly assemble in a war area, the time and labor cost is reduced, the response speed is increased, the propelling module and the flight control module can be repeatedly used, the maintainability and economical efficiency of the system are improved, and meanwhile resource waste is reduced.
Owner:NANJING GREEN TRACE AVIATION TECHNOLOGY CO LTD

Airfoil profile stability optimization method and system for suppressing transonic buffeting

The invention discloses an airfoil profile stability optimization method and system for inhibiting transonic buffeting, and relates to the technical field of aircraft safety. According to the method, the geometric morphology of the airfoil profile is accurately described through CST parameterization, the grid quality and the calculation precision after the airfoil profile is deformed are guaranteed by combining the radial basis function dynamic grid technology, the flow stability is quantified by relying on the pre-solution gain, efficient iteration is conducted through the nonlinear conjugate gradient method, transonic buffeting can be remarkably restrained, and the flow stability can be remarkably improved; and the aerodynamic performance can be optimized on the premise that engineering constraints such as no reduction of the airfoil thickness and no reduction of the lift force are met, experience trial and error and violent search of traditional optimization are avoided, the efficiency and reliability of transonic airfoil design are greatly improved, and the method is suitable for high-performance design requirements of core components such as aerospace vehicle airfoils.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Composite microparticle shot materials for high-speed shot peening on the surface of high-speed steel complex tools, preparation methods and their applications

The present invention relates to the technical field of high-speed steel tool processing, and particularly relates to a composite microparticle shot material for high-speed shot peening on the surface of complex high-speed steel tools, a preparation method and an application thereof, including: composition design, preparation, structure design, shape design, and performance design of the composite microparticle shot material; using the designed composite microparticle shot material for high-speed microparticle shot peening treatment of the high-speed steel tools; the present invention can obtain relatively high surface residual compressive stress and surface hardness, improves the cutting performance of high-speed steel tools, specifically including hobbing tools, broaching tools, and gear shaving tools, and has great application prospects in the fields of tools and surface protection.
Owner:CHANGZHOU ARROTAL PARTICLE TECH CO LTD

Planetary roller screw multi-performance coordination design method

The invention relates to a multi-performance coordination design method for a planetary roller screw, and belongs to the technical field of planetary roller screws. Comprising the following steps: step 1, based on planetary roller screw kinematics and a load distribution model, establishing a thread meshing point sliding-rolling ratio and maximum von * Mises stress calculation model; step 2, establishing equality and inequality structure constraint conditions according to the conditions of correct meshing, structure non-interference and contact boundary of the planetary roller screw; 3, according to the optimization target and the constraint condition, establishing a planetary roller screw multi-performance optimization design model; step 4, solving the planetary roller screw multi-performance design model by adopting a multi-objective genetic algorithm to obtain a Pareto frontier and corresponding structural design parameters; and step 4, obtaining a Pareto frontier range meeting the limit tradeoff cost according to the given limit tradeoff cost. And based on the Euclidean norm and minimizing the dimensionless distance, obtaining an optimal tradeoff solution and corresponding structural design parameters.
Owner:SICHUAN UNIV

Correlation evaluation method and system for performance design and reliability design of airborne products

The present invention belongs to the field of product reliability, and discloses a method and system for evaluating the correlation between performance design and reliability design of airborne products. The method includes: obtaining basic evaluation data; obtaining the project integration degree of reliability design; obtaining the control level of key components; obtaining the reliability completion degree; obtaining the reliability growth coefficient; determining the weight of the performance design and reliability design correlation evaluation index; obtaining the performance design and reliability design correlation evaluation results; and analyzing the performance design and reliability design correlation evaluation. The system of the present invention includes: a database, a project integration degree module for reliability design, a key component control level module, a reliability completion degree module, a reliability growth coefficient module, a weight module, a correlation evaluation module, and a correlation analysis module. The present invention performs analysis based on multi-source data and processes of reliability design and reliability test, so that the results of the performance design and reliability design correlation evaluation are more real and accurate.
Owner:CHINA AERO POLYTECH ESTAB

RISE-based motor adaptive preset performance asymptotic control method

The invention relates to a control method, in particular to a motor adaptive preset performance asymptotic control method based on RISE. According to the characteristics of the motor position servo system, a motor position servo system model is established; according to the RISE-based motor preset performance adaptive asymptotic controller designed by the invention, unmodeled interference is suppressed by using a robust error symbol integral strategy, and system position parameters are estimated by using the adaptive controller, so that the problems of uncertain nonlinearity and uncertain parameters of a motor servo system can be effectively solved, and the motor preset performance adaptive asymptotic controller has the advantages of high reliability and high reliability. And a controller is designed by fusing a preset performance function, and finally, the overall stability of the system is illustrated through proving. Under the interference condition, the parameter convergence is good, and the system control precision meets the performance index; the design of the controller is simplified, and a simulation result shows the effectiveness of the method.
Owner:LIHENG TECHNOLOGY (JIANGSU) CO LTD

Performance design optimization method, device, equipment and program product of vehicle component

The invention provides a vehicle component performance design optimization method and device, equipment and a program product, and relates to the technical field of vehicles, and the method comprises the steps: obtaining a parameterized component finite element model established based on target model parameters related to static stiffness in a component, carrying out geometric kinematics and elastic kinematics performance analysis on the parameterized component finite element model to obtain geometric kinematics and elastic kinematics performance parameters of the component; performing static stiffness analysis on the parameterized component finite element model to obtain first static stiffness; according to geometric kinematics and elastic kinematics performance parameters, the first static stiffness is corrected, the corrected static stiffness is made to be more suitable for the actual working condition, and therefore component structure design is assisted; according to the method, the first static stiffness is corrected, screening of target model parameters related to the static stiffness, geometric kinematics and elastic kinematics performance analysis are carried out, automatic execution can be conveniently carried out by utilizing artificial intelligence, and the rigidity of the vehicle component is automatically corrected.
Owner:XIAOMI EV TECH CO LTD

CPU-parallel parametric level set topology optimization method for CAD models of arbitrary shapes

A CPU parallel parametric level set topology optimization method for arbitrarily shaped CAD models belongs to the field of high-performance design technology. It solves the problems of the split between CAD and CAE, poor and time-consuming mesh generation, and low efficiency of large-scale mesh calculations. The topology optimization parallel computing design framework of the present invention significantly improves the efficiency and accuracy of topology optimization of complex structures by introducing parametric level set methods, parallel finite element analysis technology, and seamless integration with CAD models, and has broad engineering application prospects. It not only solves many problems of traditional topology optimization methods, but also provides an efficient and practical optimization design tool for the engineering design field. It can significantly improve the efficiency and accuracy of topology optimization when processing complex CAD models, and solves the problems of insufficient communication between CAD and CAE, poor mesh generation quality, low calculation efficiency, etc. in the existing technology, and has broad engineering application prospects.
Owner:江淮前沿技术协同创新中心 +1