7 results about "Kinetic coupling" patented technology

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 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.

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.