4 results about "Collision response" patented technology

The invention relates to a field and water surface survival self-rescue and mutual-rescue VR simulation training system and method, and the method comprises the steps: generating a physical parameter set through constructing a water body-vegetation-human body coupling control equation set, and carrying out the dynamic boundary mapping based on student movement data and equipment signals, and generating a dynamic boundary condition and a rescue tool constraint; calling physical parameters to realize multi-physical field coupling solution, and generating a physical field output set in combination with collision response; converting the physical field data into a tactile feedback waveform and a rendering instruction set by utilizing a vegetation stiffness matrix, and realizing cross-modal synchronous feedback of mechanical characteristics and visual special effects; and dynamically optimizing the physical parameter set based on training feedback data to form a training difficulty adaptive closed-loop system. According to the method, the problem of insufficient training effect migration caused by multi-physical field coupling distortion and environment response stiffness in the prior art is solved, and the physical authenticity of a virtual training scene and the adaptability of student actions are remarkably improved.

The disclosure provides a construction method including steps of: constructing a detailed model and a simplified model of the rail vehicle using finite element method based on the three-dimensional structure of the rail vehicle; initially setting the simplified model in accordance with the detailed model, including specifying materials, mechanical properties parameters, and mass point; setting different simplification thickness ratio to obtain a plurality of sets of the simplified models, designing longitudinal and lateral collision conditions, and in each type of the collision conditions, performing collision simulations on the detailed model and each set of the simplified models under each thickness ratio to obtain respective collision response curves; calculating a total CORA value corresponding to the plurality of sets of the simplified models; selecting an optimal simplified model from n sets of the simplified models with the highest total CORA values.

The application relates to the technical field of ship structure collision response analysis, in particular to a structure collision analysis method and system based on domain decomposition PINN, the method comprises the following steps: carrying out calculation domain division based on the contact relationship between an impact object and a structure, generating training point coordinates of each subdomain and corresponding boundaries, uniformly scaling the training point coordinates and multidimensional parameters, taking the training point coordinates after scaling as input to construct a collision analysis model, constructing a loss function to calculate the total loss of a submodel, configuring an independent optimizer for each allocated neural network, and outputting complete structure collision displacement field and stress field prediction results, the application can accurately capture stress concentration phenomena in the structure collision process, avoids the stress concentration capture failure problem caused by the discontinuous boundary conditions of the traditional PINN and the oscillation problem of the finite element method in the high gradient area, and improves the prediction accuracy and stability of the structure collision displacement field and the stress field.

The embodiment of the invention provides a numerical control machine tool measuring head control shaft collision response control method and system. The method comprises the steps of configuring anti-collision parameters, activating the anti-collision state of a measuring head, implementing dual-mode (automatic measurement and non-measurement) collision monitoring and response, safety response after collision, reset processing and the like, collision is accurately judged, alarm shutdown is triggered, non-reverse axial movement is locked, only reverse movement is allowed to guarantee safe exit, and the risk of secondary collision is completely eradicated. The system comprises a parameter configuration module, a state activation module, a dual-mode monitoring module, a safety response module and a reset processing module, division of labor is clear, cooperation is efficient, and a full-automatic process is achieved. According to the invention, the safety blind area in the prior art is solved, the service life and precision of the measuring head are improved, the processing quality and efficiency are guaranteed, and the maintenance cost and interruption loss are reduced.