6 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 invention belongs to the field of water-guided laser safety control, and discloses a multi-sensor fusion anti-collision system for microjet and a control method thereof, and the anti-collision system comprises a linear sensor network, an analog quantity acquisition module, a switch, a data processing module and an execution module. Through multi-sensor data fusion, dynamic threshold judgment and setting of a corresponding grading response strategy, comprehensive monitoring and protection of the operation state of the micro-jet equipment are achieved, the detection precision of the sensors is greatly improved, tiny displacement changes can be captured in time, and the collision response time is remarkably shortened; a pre-trained risk assessment model is combined with historical processing data to dynamically optimize a dynamic threshold, so that the false alarm rate is effectively reduced; furthermore, by adopting a redundancy detection array formed by linear sensors, the non-dead-corner continuous monitoring of the micro-jet is realized, and the collision source is accurately positioned, so that the safety of the micro-jet equipment is improved, the processing quality is remarkably improved, and the service life of the equipment is remarkably prolonged.

The present invention relates to the technical field of structural optimization, and discloses a method and system for optimizing the crashworthiness performance of an energy-absorbing structure of a rail vehicle, comprising: determining corresponding simulation parameters affecting energy absorption and a multi-dimensional collision mechanical response data set of the energy-absorbing structure; constructing a multi-dimensional collision response prediction model; defining a pattern stability constraint based on a decoding result of an image feature extraction network, defining a load stability constraint based on a decoding result of a curve feature extraction network, and defining an index matching constraint based on an output result of the multi-dimensional collision response prediction model; constructing a multi-objective crashworthiness optimization model of the energy-absorbing structure based on the pattern stability constraint, the load stability constraint, and the index matching constraint, and solving the model to obtain a Pareto solution set; solving the optimal feasible solution of the Pareto solution set, and using the optimal feasible solution as a crashworthiness optimization result of the target energy-absorbing structure; the present invention solves the problem of low reliability of optimization results in existing crashworthiness optimization methods.

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.