6 results about "Universal model" patented technology

This invention discloses a method for maintaining the service performance of machine tool feed systems based on sensitivity analysis using a twin model and a particle swarm optimization algorithm. The overall method encompasses a five-layer framework for digital twin modeling, electromechanical wear mechanism fusion and encapsulation, time-varying element sensitivity analysis, and multi-objective maintenance decision optimization. The modeling part employs an object-oriented five-layer architecture, deeply encapsulating physical mechanisms such as electromechanical coupling wear evolution based on spatial location distribution into a quasi-physical model layer, achieving accurate description and real-time updates of implicit time-varying elements such as localized guideway wear. The decision-making part uses the Sobol sensitivity analysis method to quantify the impact weight of each element on service performance, constructs a full-effect exponential-driven adaptive tightening mechanism for early warning thresholds, and combines it with a particle swarm optimization algorithm (PI-PSO) that introduces degradation inertia and physical boundary penalties to iteratively calculate the optimal maintenance scheme with the goal of minimizing maintenance costs, downtime losses, and performance degradation. This method not only solves the problem that general models are difficult to describe the underlying electromechanical-dynamic coupling mechanism but also achieves deep integration of optimization algorithms and physical degradation laws, significantly improving the service reliability and economic benefits of machine tool feed systems.

The application discloses an online roll temperature and thermal crown prediction method based on finite difference and polynomial regression, aiming at the technical pain point that the accuracy of the traditional analytical model is insufficient and numerical simulation cannot meet the online real-time calculation demand, a plurality of groups of working conditions are designed through an orthogonal experiment method, and a finite difference method is used to calculate roll steady-state temperature field data to construct a training data set, based on the data set, a polynomial regression algorithm with elastic network regularization is used to fit an axial temperature distribution general model with the roll temperature field as an input variable, after obtaining the online surface axial temperature distribution of the roll, the general model is substituted into the internal temperature field to restore the internal temperature field and calculate the radial thermal expansion amount at each position, so that compensation information is provided for a shape control system of a rolling mill. The application simplifies complex physical field simulation into lightweight algebraic formula operation, retains the high analytical accuracy of the finite difference method, realizes real-time prediction, and can significantly improve the rolling quality of silicon steel products.

This invention relates to the field of multi-axis CNC machining and industrial robot machining technology, specifically disclosing an asymmetric five-axis toolpath smoothing method based on path weighted synthesis. The method includes: constructing a universal corner smoothing model based on path weighting; constructing an analytical expression for a high-order continuous weighted function; Cartesian space smoothing of the tool tip position path; unit spherical space smoothing of the tool axis direction path; synchronous adjustment of C3 continuous parameters for position and direction paths; interference verification and asymmetric adjustment of adjacent corner transition intervals; continuous speed planning and real-time interpolation; and motion control of the machining equipment. This invention overcomes the shortcomings of existing five-axis path transition smoothing technologies, such as poor geometric versatility, incoordination between tool tip and tool axis movements, easy interference in short path segments, and inconsistent bidirectional machining trajectories. It improves geometric versatility and processing efficiency, achieves high-order continuity and consistent machining surfaces, and can be ported across platforms and extended to higher orders.

This invention relates to a method for constructing blade stiffness and linear density based on finite element analysis, belonging to the field of wind turbine blade technology. It solves one of the problems of lacking a universal model, which is detrimental to the early prediction and rapid evaluation of test bench schemes. The invention includes the following steps: Step S1: Calculate the linear density and stiffness of the wind turbine blade; Step S2: Normalize and preprocess the stiffness and linear density to obtain a discrete point data set; Step S3: Fit a double exponential function with 15 different initial values, use the Levenberg-Marquardt algorithm to solve for the optimal parameters, and select R... 2 The highest fitting result is taken as the initial optimal solution; Step S4: Adaptive outlier detection and removal, comparing the R-values ​​of several methods. 2 For the degree of improvement, select R. 2 The method that maximizes the improvement is taken as the final result; Step S5: Use the double exponential function model for subsequent prediction of the linear density and stiffness of ultra-long blades. This invention is used to improve the accuracy of blade physical performance curve fitting and provides a model basis for predicting the physical performance of ultra-long blades.

This invention discloses a modular universal model and simulation method for simulating laparoscopic breast surgery, comprising a thoracic base and a detachable chest skin module covering the thoracic base; the thoracic base includes a chamber with an opening at the top, on which the chest skin module covers; a breast module is detachably disposed within the chamber; the breast module includes a receiving part for placing / replacing pathological modules or ex vivo animal tissue; the outer surface of the chest skin module has several operating holes for inserting a laparoscope to perform simulated surgical operations; the breast module has a side opening communicating with the operating holes; this invention features a flexible design, a high degree of modularity, and individual parts can be replaced. It also provides personalized training programs, and the training difficulty can be adjusted as needed to meet the training needs of doctors at different levels; furthermore, the individual replacement and maintenance of each part not only greatly reduces maintenance costs but also extends the model's lifespan, resulting in a significant decrease in maintenance costs.