Allocation Method of Combat Aircraft System Vulnerability Index

Abstract

A method for assigning vulnerability indicators of a combat aircraft system. By establishing a vulnerability model of a certain type of fighter, under certain threat strikes, determine the initial parameters of vulnerability, and then determine the number of times the aircraft has been hit and the number of times each component has been hit. Then determine the independent state of the aircraft and the probability of each state being hit, and substitute the above data into the calculation formula of the comprehensive importance and Griffith importance to obtain the comprehensive importance and Griffith importance of each component. Finally, the fragility of the whole machine is allocated by using the fragility index allocation method, and the fragility of each component can be obtained. After obtaining the fragility assigned to each component, the fragility reduction is performed on the components with high fragility to reduce its fragility, thereby improving the survivability of the aircraft.

Description

technical field [0001] The invention relates to the field of vulnerability reduction design of aviation combat aircraft, and specifically allocates vulnerability indexes of aircraft systems based on comprehensive importance and Griffith importance theory. Background technique [0002] Vulnerability is defined as the ability of a combat aircraft to withstand the threat of man-made hostile environments in a combat state. Given the vulnerability of aircraft components is an important task in survivability assessment, it should be considered in the early stage of aircraft design. It provides guidelines for effectively improving aircraft survivability, and puts the main design tasks on highly vulnerable components in a targeted manner, so as to achieve efficient and optimal design of aircraft survivability. [0003] The higher the vulnerability of the aircraft, the easier it is to be killed when it is hit, and the more it will reduce the ability of the aircraft to complete the t...

AI Technical Summary

Problems solved by technology

Northwestern Polytechnical University proposed a method for sorting the vulnerability of aircraft components in the invention with the application number 201410352457.9. This method provides five kinds of vulnerability ranking methods, which are respectively structural probability importance, key importance ( Criticality), FV importance, RAW importance and RRW importance, but these five methods are only suitable for two-state systems, that is, when the aircraft is hit, the aircraft has a killing state and a non-killing state, without considering the intermediate state of the aircraft. intermediate states do not result in aircraft kills, but affect aircraft performance and mission efficiency

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