Multidisciplinary System Design Optimization on Precise Lunar Landing Trajectories and Spacecraft Systems

Abstract

This paper presents a method for simultaneous design optimization of precise lunar landing trajectories and spacecraft systems. The technique applies Multidisciplinary System Design Optimization (MSDO), a design methodology for complex engineering systems and subsystems that coherently exploits the synergistic effects of interacting phenomena. A system viewed as an MSDO problem is composed of subsystems of the orbital transfer phase, powered descent phase, and vertical descent phase. The mathematical model clarifies the interface conditions between the mission phases, the interaction between the landing descent trajectories, and the spacecraft system parameters. This work scrutinizes the design and sensitivity analysis results of the entire lunar landing sequence using the proposed MSDO framework. These results improve mission performance and feasibility by identifying decision variables and constraints that significantly impact the design of highprecision lunar landing missions.