Simulation Method for Multiple Collision Situations of Escaped Vehicles Following Multiple Probability Distributions

Abstract

The invention provides a method for simulating multiple collisions of an escape aircraft following multiple probability distributions, the method comprising the following steps: establishing a system model of a multi-body aircraft; analyzing the uncertainty of some uncertain parameters in the simulation, and designing to meet The realization of real distribution law and random process; design multiple collision simulations, and record the results. The steps of establishing the system model of the multi-body aircraft include: respectively establishing a parametric model of the multi-body aircraft; assigning values ​​to the physical properties of the research object, and then performing kinematics analysis and dynamic analysis. The simulation of multiple collisions can have three simulation situations: true random simulation, selected simulation, and range estimation simulation. The invention can realize fast solution of multi-object collision, and can quickly modify parameters to obtain simulation verification of a series of models, improve verification efficiency, and effectively ensure the authenticity of results.

Description

technical field [0001] The invention relates to a method for simulating multiple collision situations of an aircraft following multiple probability distributions, and belongs to the technical field of aircraft contact separation (collision). Background technique [0002] At a high Mach number, multiple aircraft collide in space due to loss of control, or secondary contact collisions occur after separation. This patent proposes a technical method for studying this problem. [0003] After the collision, what are the possible situations of the attitude of the aircraft, the possible situations of the trajectory, the maximum and minimum distances between the colliding bodies, especially for multi-moving bodies, the attitude, trajectory and collision under the condition of multi-parameter uncertainty Issues such as the relationship between entities are the most concerned. [0004] However, in reality, there are interferences in wind speed and atmospheric density, often due to the...

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Problems solved by technology

[0004] However, in reality, there are interferences in wind speed and atmospheric density, often due to the measurement of various physical parameters, namely the center of mass, inertia, etc., the deviation of aerodynamic load, and the difference in attitude at the time of collision will also affect the results. Although the accurate physical model is used to obtain After the collision, the relationship between attitude, trajectory and collision body can be obtained, but in actual situations, it cannot effectively reflect the real result

[0005] In response to this problem, the situation when the parameters remain unchanged has been considered as a basic state, and the parameters in the worst case are determined as the limit case. Although this can meet the above requirements, the main problem is, under what circumstances are the parameters Worst, when there are many parameters and no clear relationship, it is difficult to get satisfactory results

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