Validation of Lunar Landing GMPSP Guidance from PIL Studies<sup>∿/sup>

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• 作者：V. Janani<sup>&lowast ; sup> ; Kapil Sachan<sup>&lowast ; &lowast ; sup> ; Radhakant Padhi<sup>&lowast ; &lowast ; &lowast ; sup><sup> ; sup><sup>padhi@aero.iisc.ernet.in" class="auth_mail" title="E-mail the corresponding authorsup>
• 关键词：Processor-in-loop simulation ; Lunar landing ; GMPSP guidance ; PIL simulation
• 刊名：IFAC-PapersOnLine
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：49
• 期：1
• 页码：694-699
• 全文大小：1400 K

文摘

This paper validates the on-board applicability of lunar landing Generalized Model Predictive Static Programming (GMPSP) guidance algorithm using processor-in-loop (PIL) simulations. PIL simulations have been extensively used to verify the real time applicability of algorithms by obtaining run-time information and memory consumption. In this paper, two segmented approach is proposed for the powered descent phase of lunar landing to minimize fuel consumption. The GMPSP guidance algorithm is used for both segments of the powered descent phase to generate the admissible guidance law. The on-board applicability and computational efficiency of GMPSP guidance algorithm are demonstrated through PIL simulation results. In PIL simulations, the GMPSP algorithm is coded in C and validated by using the target TMS320C6748 Digital Signal Processor. The results obtained from the target processor gives an insight into the behavior of the algorithm during the actual mission. The convergence time of the GMPSP algorithm is determined from CPU cycles required by the processor for convergence of the algorithm.