Global Sensitivity Analysis for Affecting Factors of Firing Dispersion of Multiple Launch Rockets System Based on EFAST Method
Sha Zhaoming;Yu Cungui;School of Mechanical Engineering,Nanjing University of Science & Technology;
To analyze the influence of random factors such(rocket, launcher, meteorological environment, etc.) on firing dispersion quantitatively, the global sensitivity analysis was adopted. The calculation model of rocket falling points was established based on the flight dynamics equations of rockets and a global sensitivity analysis method, namely the extended Fourier amplitude sensitivity test(EFAST), was introduced and applied to the parameter sensitivity analysis of the model. As an example, the global sensitivity analysis was carried out on a 122 mm multiple launch rockets system. The analysis results show that the mass error and initial disturbances are the major factors influencing the firing dispersion; there are certain interactions between random factors in the model; EFAST has the advantages of minor calculation and the results are more intuitive, clearer and easier to analyze.
【CateGory Index】： E91;E924.93