Method for simulating repeated collision conditions of escape air vehicles through abiding by multiple probability distributions

Abstract

The invention provides a method for simulating repeated collision conditions of escape air vehicles through abiding by multiple probability distributions. The method comprises the following steps of:establishing a multi-body air vehicle system model; analyzing uncertainty of partial uncertain parameters in simulation, designing a distribution law satisfying reality, and realizing a random process; and designing repeated collision condition simulations and recording a result. The step of establishing the multi-body air vehicle system model comprises the following sub-steps of: respectively establishing parameterized models of multi-body air vehicles; and assigning a physical attribute of a research object, and carrying out kinematics analysis and kinetic analysis. The repeated collision condition simulations comprise three conditions of real random simulation, selected simulation and range estimation simulation. According to the method, rapid solution of multi-object collision can be realized, and parameters can be rapidly modified to obtain simulation verification of a series of models, so that the verification efficiency is improved and authenticity of the results is effectivelyensured.

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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