11 results about "Kinetic coupling" patented technology

The invention relates to the technical field of underwater towing, in particular to an underwater towed body towing performance design method, which comprises the following steps of: performing static dynamic analysis on a towed body; carrying out dragging dynamics analysis on the towed body; constructing a towed body structure model, and performing hydrodynamic simulation calculation; establishing a dynamic coupling numerical simulation model of the towing system; and carrying out dragging attitude simulation, and obtaining an optimal design scheme. According to the invention, key indexes such as trim and rolling of the towed body in the towing system are ensured to meet the stability standard, so that the urgent requirements of marine acoustic detection on high precision and high reliability are met.

The invention discloses a gear broken tooth failure diagnosis method and a related device under a friction dynamics coupling condition, and relates to the technical field of gear broken tooth failure diagnosis, and the method comprises the steps: solving a dynamics model in a gear transmission process under the friction dynamics coupling condition, the method comprises the following steps: obtaining a rotation angle of a driving gear and a rotation angle of a driven gear, further calculating to obtain gear tooth root bending stress and a gear bending fatigue safety coefficient, and decomposing vibration signals in a transmission process of the driving gear and the driven gear by utilizing an ICEEMDAN algorithm when determining that a tooth breakage risk exists based on the gear bending fatigue safety coefficient. And further determining a support vector, calculating a distance between the support vector and a sphere center of a reference hypersphere constructed by using an SVDD algorithm, and calculating to obtain a gear health degree based on the distance so as to complete gear tooth breakage failure diagnosis. According to the method, the calculation precision of the gear tooth root bending stress and the diagnosis precision of gear tooth breakage failure diagnosis can be improved.

The invention belongs to the technical field of intelligent control and collaborative planning, and discloses a multi-machine suspension system obstacle avoidance planning method and system based on a multi-level collaborative planning framework, and the method comprises the steps: building a multi-machine coupling model comprising kinematics coupling and dynamics coupling based on the spatial configuration of a suspension system; based on a multi-machine coupling model containing kinematics coupling and dynamics coupling, the rope length, tension, the tail end of a crane and the position of a suspended object of the multi-machine suspension system are obtained; a global-local-collaborative three-level obstacle avoidance planning framework is constructed; based on a global-local-cooperative three-level obstacle avoidance planning framework, three-dimensional combined obstacle avoidance of a suspended object, a rope and a crane tail end is realized.

This invention relates to the field of agricultural machinery technology, specifically to a multibody dynamics coupling modeling method for a tractor's integrated transmission system that integrates tire-soil-implement interaction. The method includes constructing an initial multibody dynamics model comprising the engine, main and auxiliary gearboxes, transfer case, front and rear drive axles, and tires. By incorporating soil hardness, tire pressure, and implement parameters, and introducing tire-soil and implement-soil interaction models, the mechanical coupling between tires, implements, and soil is achieved. Through high-precision numerical solutions, the traction efficiency and energy consumption indicators of the tractor under different soil conditions and operating modes are obtained, thus providing theoretical support for tractor energy efficiency optimization and operating strategies. This invention, through global coupling modeling and high-precision simulation, can effectively improve the traction efficiency of the tractor transmission system, reduce energy consumption, and provide quantitative basis for optimized design, possessing broad engineering application value.

The application discloses a kind of energy consumption optimal cooperative speed planning methods for highway train, belong to intelligent transportation technical field.The method first obtains driving environment and vehicle parameter;Second, based on dynamic physical model, slope, wind resistance and other dynamic weight coefficients are calculated;Then, construct the joint objective function of fusion energy consumption, efficiency and safety, and load speed, spacing and formation sequence constraint, establish mixed integer programming model;Next, the nonlinear term in model is linearized to obtain standardization model;Finally, real-time optimization is solved using solver, and the speed, spacing and formation sequence of each vehicle are output to make the global energy consumption of formation optimal.The application overcomes the problem that the prior art lacks formation cooperation and has poor environmental adaptability, through multi-vehicle dynamics coupling and real-time optimization, realizes the joint cooperative planning of highway train speed and spacing in dynamic environment, and significantly reduces the overall transportation energy consumption.

The invention discloses a gear gluing fault diagnosis method under a friction dynamics coupling condition and a related device, and relates to the technical field of gear gluing fault diagnosis, and the method comprises the steps: carrying out the iterative calculation based on a dynamics model in a gear transmission process under the friction dynamics coupling condition, fluid shear stress in the gear transmission process is obtained, the contact surface heat distribution coefficient of the driving gear and the contact surface heat distribution coefficient of the driven gear are obtained through calculation based on the fluid shear stress, and the contact surface temperature of the driving gear and the contact surface temperature of the driven gear are further obtained through calculation; and further calculating to obtain a gluing safety coefficient of the driving gear and a gluing safety coefficient of the driven gear, and based on the gluing safety coefficient of the driving gear and the gluing safety coefficient of the driven gear, determining whether a gear gluing fault exists in the transmission process of the driving gear and the driven gear so as to complete gear gluing fault diagnosis. The diagnosis precision and the application range of gear gluing fault diagnosis can be improved.

The invention belongs to the field of hydrogen storage materials, and provides a planetary shear mixing method of metal hydride powder. According to the invention, a planetary shear mixer is adopted to carry out pulse-type shear mixing on a metal hydride main phase, Ti-MgH2 core-shell intermediate powder, a catalytic doping agent, a heat-conducting and anti-agglomeration auxiliary agent, lithium hydride and a lubricating and coating auxiliary agent in the same direction of revolution and rotation in an inert atmosphere; by accurately controlling revolution speed, autorotation speed ratio and unit mass specific energy input, highly uniform dispersion and interface modification of the powder are realized, and particle size distribution uniformity, specific surface area, compact density and effective hydrogen storage capacity retention rate of the mixed powder are remarkably improved. The technical problems of high compaction density and hydrogen absorption and desorption dynamic coupling, strong shear dispersion and core-shell structure stability balance, contradiction between carbon-based network construction and effective hydrogen storage density and the like of an existing hydrogen storage system are solved, and wide hydrogen storage application value is achieved.

The present application relates to the technical field of hydrological model, and discloses a kind of dynamics coupling simulation method, system, equipment and medium suitable for four water transformation and vegetation growth of arid shallow groundwater irrigation area, the present application is closely coupled in space-time scale based on the equation of soil water-groundwater-surface water and improved crop growth model, and reasonably consider the influence of various agronomy, land management measures (such as surface covering, earth embankment, channel drain etc.) in irrigation area on water transformation, and the influence of soil salinization caused by shallow groundwater on plant root water absorption and growth, accurately and efficiently simulate the coupling process of four water transformation process and vegetation growth in arid shallow groundwater irrigation area, effectively ensure the accuracy and stability of the space-time dynamics of simulated soil water-groundwater-surface water and their interaction as well as accompanying process (salt migration) and crop growth condition, simulation efficiency is high, operability and practicality are strong.

A ground test method for space mechanical arm visual servo verification, the mechanical arm controller, the mechanical arm product, the camera product and the matched software and the like are all 100% involved in ground test verification, the simulation system is used to project the space mechanical arm plane motion to three-dimensional motion, the ground hardware test equipment is reduced, and the economic cost of test verification is reduced; the invention does not limit the mechanical arm motion speed, can carry out ground test verification according to the on-orbit real working condition input according to the overall task, and greatly improves the space-ground consistency of system test; the invention does not need to model the mechanical arm dynamics characteristics, eliminates the error caused by dynamics modeling or external mechanical arm dynamics coupling, and improves the space-ground consistency of dynamics motion equivalence.

The application discloses an airplane landing dynamic response equivalent test device and method of an airport runway bridge, and belongs to the technical field of airplane load bridges. The device comprises a lifting and dropping subsystem, a heading speed simulation subsystem, an adjustable attitude landing gear mounting clamp, a scaled landing gear verification test piece, a dynamic equivalent scaled bridge verification test piece and a multi-dimensional measurement subsystem. The application synchronously simulates the influence of multiple key factors, such as sinking speed, heading speed, landing mass and landing attitude angle, on the machine-bridge coupling dynamic response in the same physical test device; the scaled bridge is designed through the equivalent criterion of constant frequency ratio, so that the dynamic coupling characteristics are consistent with the original structure. The application fills the blank of the machine-bridge coupling physical verification means, can provide measured verification data for a numerical simulation model, and is suitable for the design and safety evaluation of airport runway bridges.

The application discloses a gear tooth fracture failure diagnosis method and related device under a friction dynamics coupling condition, relates to the technical field of gear tooth fracture failure diagnosis, and comprises the following steps: solving a dynamics model in a gear transmission process under the friction dynamics coupling condition, obtaining a rotation angle of a driving gear and a rotation angle of a driven gear, further calculating a gear tooth root bending stress and a gear bending fatigue safety factor, when it is determined that there is a tooth fracture risk based on the gear bending fatigue safety factor, decomposing vibration signals in the driving gear and the driven gear transmission process by using an ICEEMDAN algorithm, further determining a support vector, calculating a distance between the support vector and a ball center of a benchmark hypersphere constructed by using an SVDD algorithm, and based on the distance, calculating a gear health degree to complete gear tooth fracture failure diagnosis. The application can improve the calculation accuracy of the gear tooth root bending stress and the diagnosis accuracy of the gear tooth fracture failure diagnosis.