Interval Uncertainty Analysis of Soft-landing Dynamics of Lunar Lander

doi:10.3969/j.issn.1000-1093.2019.02.025

Abstract

Abstract: Dynamic analysis of soft-landing is very important for the design of lunar lander. At present, the determined landing attitude and speed are considered while not considering the uncertainty of these parameters in the analysis of soft-landing dynamics. Based on Chebyshev interval analysis method, an analysis process of landing dynamic interval based on nonlinear finite-element model is proposed for the dynamic characteristics of landing process. The upper and lower bounds of dynamic response are calculated using Chebyshev method and compared with the simulated results of Monte Carlo method. Comparative result shows that the analyzed results of Chebyshev interval analysis method can fully cover those of Monte Carlo method, and the dynamic interval is not enlarged. The influence of truncation order on the analytic error of dynamic interval was analyzed. The analyzed result shows that the truncation order has little influence on analysis error. Chebyshev method has the advantage of high accuracy and efficiency. Key

Key words: lunarlander, intervalparameter, uncertaintyanalysis, Chebyshevpolynomial, MonteCarlomethod

CLC Number:

V476.3

CHEN Zhaoyue, LIU Li, CHEN Shulin, CUI Ying. Interval Uncertainty Analysis of Soft-landing Dynamics of Lunar Lander[J]. Acta Armamentarii, 2019, 40(2): 442-448.

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