11 results about "Force analysis" patented technology

The application discloses a portrait inspection and identification method based on gait cycle decomposition and multi-phase force analysis, and comprises the following steps: extracting the skeleton key points of a target object in a target object image set in a comparison video and the confidence score of each skeleton key point; extracting the features of the target object in the target object image set according to the skeleton key points of the target object, and obtaining the target object features, wherein the target object features comprise basic features, gait cycle features, gait stage features and gait parameter features; integrating the basic features, the gait cycle features and the gait stage features to obtain comprehensive features; respectively calculating the similarity of the target object features and the comprehensive features in the comparison video to obtain similarity calculation results and overall similarity calculation results; and obtaining the identity identification result of the target object according to the similarity calculation results and the overall similarity calculation results.

This invention discloses a magnetic levitation control method based on regularized data-driven strategy optimization. First, force analysis is performed on the smallest levitation unit of the maglev train to establish nonlinear dynamic equations. Then, input and output data of this unit are collected at time intervals {0,1,…,k}, and a sample covariance matrix is ​​constructed based on the data. The dynamic equations of the levitation system are rewritten through covariance parameterization. Subsequently, a regularization term is introduced into the LQR cost function to construct a direct data-driven LQR optimization problem with regularization constraints. Finally, the strategy parameter matrix is ​​updated using the projected gradient descent algorithm, and the covariance matrix and its inverse matrix are recursively updated using the rank-one update rule to achieve online control gain update and complete the levitation control of the maglev train. This invention eliminates the need for precise dynamic modeling, solving the problems of cumbersome modeling and inaccurate parameters in traditional model-based control. The regularization term significantly improves the system's robustness to complex disturbances and noise, effectively avoiding system instability under conditions of minimal air gap constraints.

The application discloses a kind of excavator material weighing system and method, belong to engineering machinery intelligentization measurement field;System is composed of excavator body, inclination sensor, pressure sensor and controller;Inclination sensor is installed in bucket rod and bucket, pressure sensor is installed in bucket cylinder two cavities, controller posture, pressure, handle and main pump signal are collected, and weighing calculation is carried out in the relative static time when unloading before digging is completed, and bucket is not moved.The mechanical model is established only by using bucket parameters, the complex parameters of swing arm and bucket rod are omitted, and the calibration difficulty and external interference are reduced.The center of gravity of material, the weight of bucket is corrected in real time by force analysis of bucket and cylinder output calculation, and the weighing accuracy is significantly improved.The application solves the problems of existing technology, such as complicated calibration, easy to be affected by machine parameters, large dynamic error, has the advantages of simple calculation, high stability, strong adaptability, accurate weighing, and is suitable for various types of excavator online material measurement operation.

This invention relates to the field of fluid data analysis technology, specifically to a numerical simulation analysis method for the inlet and outlet characteristics of a water hammer-resistant air valve. This method acquires the spatiotemporal evolution data of the pressure field on the surface of a float under set apparent liquid phase velocity and gas content conditions, constructs a pressure spatiotemporal matrix, and extracts the pressure distribution order coefficient through singular value decomposition. Based on the changing trend of this coefficient, it identifies the Venturi strong adsorption state and records the maximum order coefficient of the process. Simultaneously, combining the relative time lag between the actual closing time of the float and the theoretical arrival time of the pure liquid phase, the working state of the air valve is divided into a substantially safe zone, a sub-safe zone, or a dangerous zone. Finally, the apparent liquid phase velocity corresponding to the boundary between the safe zone and the sub-safe zone is used as the engineering critical velocity. This method overcomes the limitations of traditional force analysis, effectively identifies stable adsorption structures from turbulent noise, accurately warns of hidden risks, and significantly improves the reliability of water hammer protection design.

The application discloses a hull parametric modeling method with bulb bow and bulb stern based on Grasshopper development. The first step is to extract hull lines and other information from a ship type library. The second step is to generate curves, position, sort, project and establish constraint relationships based on non-uniform B-spline curves. The third step is to generate a skin surface according to the defined hull topology structure and the spline curve established in the region. The step-by-step generation method is used to continuously extract the edge line of the generated surface for generating the NURBS surface of the next region. The generation sequence is: bulb bow, bow, bulb stern surface, bulb stern, hull, and hull transition area. The fourth step is to assemble and trim the propeller and rudder. The method solves the problems of low precision, weak hull shape control ability and difficulty in forming a closed surface in the bulb bow and bulb stern regions during the current hull parametric modeling, and the developed hull hydrostatic force analysis method can greatly improve the design efficiency.

This invention discloses a method for analyzing and monitoring the stress on conductors under icing conditions, relating to the technical field of conductor monitoring. Upon detecting signs of icing retreat, the system acquires conductor state data within the icing retreat trigger window, forming a comparison segment before and after retreat. Based on this, it calculates the retreat morphology index, stress release index, and stress transmission closure index, further obtaining an ice-rebound risk index to determine whether icing retreat corresponds to true stable recovery. Therefore, the system no longer simply cancels the warning based on reduced icing thickness, decreased static tension, or sag recovery, but comprehensively judges whether the icing retreat morphology is stable, whether the stress release has converged, and whether cross-span disturbances have closed. When there is local detachment, segmented residue, eccentric residue, or cross-span stress transfer, the warning continues or an inspection is triggered, thereby identifying secondary risks caused by ice-rebound, residual ice overloading, and stress redistribution, reducing the possibility of prematurely canceling the warning and missing cascading stress anomalies.

The application discloses a device and a method for determining the characteristics of volatile component coke residue, and the device comprises a workbench, a camera, a pressing block, a driving mechanism, a first sensor and a computer. The tabletop of the workbench is provided with a sample station area for placing a volatile component crucible. The camera is used for shooting the volatile component crucible from the top. The pressing block can vertically enter the volatile component crucible to apply pressure to the coke residue. The driving mechanism is connected with the pressing block to drive the vertical movement of the pressing block. The first sensor is arranged on a first target component of the driving mechanism and is used for feeding back the force change of the first target component during the movement of the pressing block. The computer is electrically connected with the camera and the first sensor respectively and is provided with an image analysis module and a force analysis module. The device and the method provided by the application are beneficial to improving the efficiency and the accuracy of the determination of the characteristics of the volatile component coke residue.

This invention relates to a nonlinear time-domain aircraft ground motion stability analysis method, comprising the following steps: acquiring scene information data and aircraft parameters; performing force analysis on the aircraft based on the scene information data and aircraft parameters to construct a set of aircraft ground motion dynamic equations; simulating the aircraft ground motion dynamic equations, inputting aircraft taxiing speed and nose wheel steering angle parameters to obtain a time-domain plot of the aircraft's turning angular velocity, thereby obtaining the stability of the aircraft's ground motion. Compared with existing technologies, this invention employs a nonlinear time-domain analysis method based on independent tire forces, which has advantages such as high accuracy and high safety.

This invention discloses a method for rapid conversion of CAD drawings into 3D models. It relates to the field of 3D modeling technology and solves the problem of lacking systematic analysis methods for the force state at model splicing points. This invention focuses on the splicing points after model splicing, systematically confirming axial stress, shear stress, and bending stress, and generating characteristic forces through torque vector combination calculations, integrating complex multi-directional forces into intuitive spatial vector markers. This method not only fully covers the core force types at splicing points but also accurately reflects the spatial distribution characteristics of forces, providing a clear and reliable basis for subsequent anomaly detection, and solving the problems of scattered and difficult-to-comprehensive evaluation in traditional force analysis.

This application relates to the field of computers and provides a method, system, computer device, and storage medium for generating an order flow footprint based on market snapshots. The method includes: acquiring real-time market snapshot data; performing transaction direction judgment processing based on the real-time market snapshot data to obtain the transaction direction judgment result corresponding to the real-time market snapshot data; performing volume allocation processing based on the transaction direction judgment result to determine volume allocation data, thereby obtaining an initial order flow footprint; performing bullish / bearish force analysis processing based on the volume allocation data to determine the indicator analysis result of the bullish / bearish force analysis indicator; and displaying the indicator analysis result in the initial order flow footprint to generate a target order flow footprint. The implementation of this method improves the computational efficiency and real-time performance of the data, and enhances the effectiveness of data analysis.

A force analysis system and method for a probe. The system comprises a force measurement component (1) configured to simultaneously perform force testing on a probe tip and a probe tail of a probe assembly (6); a clamping component (2), which is configured to position, clamp and fix the probe assembly (6); an observation component (3), which is configured to realize alignment observation on a probe tip side and a probe tail side of the probe assembly (6); and a control module (5), which is configured to control, by means of inputting a control instruction, the movement of the force measurement component (1) relative to the probe assembly (6), and realize the force testing and analysis on the probe tip and the probe tail, wherein the force measurement component (1) comprises at least two force measurement mechanisms symmetrically arranged on the probe tip side and the probe tail side, and is configured to simultaneously realize the force testing on the probe tip side or the probe tail side of the probe assembly (6). The system can simultaneously perform force measurement on the probe tip and the probe tail, so as to comprehensively analyze the force transmission performance of the probe under actual operating conditions.