Volume 38, Number 4, August 2020
|Page(s)||715 - 722|
|Published online||06 October 2020|
Research for Space Interception Simulation under Nonlinear Time-Varied Similarity
Institute of Precision Guidance and Control, Northwestern Polytechnical University, Xi'an 710072, China
A nonlinear time-varied similarity(NTVS) simulation algorithm is proposed to solve the problem that the process of space interception is intractable to simulate with high precision in limited platform under the linear constant similarity(LCS). Firstly, the similarity criterions based on the dimensional analysis are given in the simulation of the interception motion at high-speed, and the disadvantage of LCS is analyzed. Then, the reference motion is introduced to establish a time-varied spatio-temporal transform system which scale factors are self-adaptive with time, and the method is proved to satisfy the similarity consistency. Finally the way that linear separation and independent mapping solve the problem that the large magnitude uniform motion in approaching directions and small magnitude overload motion in lateral directions are simulated in a limited ground platform. The results show that the NTVS can simulate the whole process of interception and perform better in accuracy comparing with that via LCS.
Key words: time-varied transform / spatio-temporal similarity / space interception / ground simulation
关键字 : 时变映射 / 时空相似性 / 空间拦截 / 地面仿真
© 2020 Journal of Northwestern Polytechnical University. All rights reserved.
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