6results about How to "Improve Simulation Confidence" patented technology

The invention discloses a circuit breaker operating mechanism load simulation device and a test method. The load simulation device comprises an eccentric wheel, a motor, an output sliding block, a force sensor, a displacement sensor and a bottom plate. An adjusting sliding block is arranged on the surface of the eccentric wheel in the radius direction of the eccentric wheel and can move in the radius direction of the eccentric wheel. The output shaft is connected with an eccentric shaft of the eccentric wheel and drives the eccentric wheel to rotate; a connecting rod is rotationally connected between the output sliding block and the adjusting sliding block, and the eccentric wheel rotates to drive the output sliding block to reciprocate; the force sensor is connected with the output sliding block and transmits force to a load part; the displacement sensor is used for detecting the displacement of the output sliding block; the eccentric wheel, the motor and the displacement sensor are arranged on the top of the bottom plate. The load simulation device is high in flexibility and can simulate a real mechanical load.

The application discloses an automatic driving scene generation method and device and a vehicle, and relates to the technical field of automatic driving scene generation, and in particular to a method for generating a scene by using a world model, a long-tail safe scene, risk attribution analysis, counterfactual reasoning, and multi-objective comprehensive scoring and iterative re-determination screening.

The invention belongs to the technical field of pilot bifurcation prediction, and discloses a pilot bifurcation prediction model construction method and application, and the method comprises the steps: obtaining multi-scale discharge data in a pilot discharge process; dividing the pilot development path into a series of space-time fragments along the axial movement direction of the pilot development path based on the multi-scale discharge data, and acquiring multi-dimensional physical characteristics of each space-time fragment, including pilot head injection charge quantity, pilot head background electric field intensity, pilot head deflection angle and voltage change rate, so as to construct a training sample set; training a neural network model by using the training sample set, fusing a physical rule as a trend constraint into training, and when the model converges, taking the model as a pilot bifurcation probability prediction model; according to the method, the limitation that a single threshold criterion depends on experience setting and cannot represent a multi-dimensional physical quantity coupling driving mechanism in traditional simulation can be overcome, and a bifurcation judgment mechanism giving consideration to physical certainty and randomness is provided for pilot discharge simulation.

The invention relates to a multi-satellite cooperative observation capability semi-physical simulation verification system and method, and the method comprises the steps: packaging software (such as multi-satellite on-satellite data fusion software, on-satellite task planning software, on-satellite network routing software and the like) related to the multi-satellite cooperative capability in N types of satellites needing simulation verification through a container technology; a digital prototype of each type of satellites is formed, the expansibility of the number of satellites in simulation can be improved, the cost of simulation verification can be remarkably reduced, and high simulation confidence is reserved; single machines, related to the multi-satellite cooperative capability, on various satellites are connected to a simulation system in the form of physical or digital single machines, and simulation verification is carried out on the multi-satellite cooperative capability under the unified scheduling and management of the simulation system. According to the method, the constellation scale supported by the simulation system for verification can be remarkably improved, and the expansibility of simulation is improved.

This invention provides a method for optimizing the loading of a digital twin model based on heterogeneous positioning data, characterized by comprising: S1) acquiring data; S2) converting the position information into planar coordinates; S3) loading an original 3D model corresponding to the target object type; S4) determining the current partition to which the model instance belongs and adjusting the display orientation of the model instance in the scene; S5) attaching at least one extended collision detection body to the corresponding model instance for at least one type of target object; S6) performing collision detection on the model instances in the digital twin scene; S7) in response to a detected collision, determining the model instance to be moved and applying a displacement to eliminate spatial overlap. This invention also provides a system for optimizing the loading of a digital twin model based on heterogeneous positioning data, comprising: a data acquisition module; a coordinate transformation module; a model generation module; an orientation correction module; a collision body extension module; a collision detection module; and a collision response module.

This invention provides a method for error propagation and control in full three-dimensional performance simulation of an aero-engine, relating to the field of aero-engine performance simulation technology. The method includes the following steps: decomposing the aero-engine into multiple core components along the airflow direction and establishing aerodynamic and thermodynamic coupling simulation models between these components; identifying and quantifying the simulation error sources of each component and defining the simulation error values ​​for each component; constructing an overall engine error propagation network, including sensitivity weights and coupling propagation coefficients; calculating the overall engine cumulative error based on the sensitivity weights and coupling propagation coefficients; and during the full three-dimensional simulation of the entire engine, collecting simulation data of the outlet airflow parameters of each component, comparing the simulation data with experimental data, and iteratively correcting the simulation models of each component and the overall engine cumulative error based on the comparison results. This invention improves the overall engine simulation accuracy, ultimately reducing the overall engine simulation error to within 2.5%, thus enhancing the engineering reliability of the simulation results.