دانلود رایگان مقاله لاتین بهینه سازی مسیر برای فرود روی ماه از سایت الزویر
عنوان فارسی مقاله:
بهینه سازی مسیر برای فرود آرام روی ماه با استراتژی پالایش مش تطبیقی بر اساس هامیلتونی
عنوان انگلیسی مقاله:
Trajectory optimization for lunar soft landing with a Hamiltonian-based adaptive mesh refinement strategyش
سال انتشار : 2016
برای دانلود رایگان مقاله بهینه سازی مسیر برای فرود روی ماه اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Recently, exploration of the moon, the nearest celestial body to the earth, has become increasingly attractive for space scientists for several reasons. For example, Helium-3, which is used in nuclear fusion and could be a future energy source, is abundant on the Moon. The existence of water has also been confirmed by the National Aeronautics and Space Administration’s (NASA) Lunar Crater Observation and Sensing Satellite. Furthermore, the Moon can be an advance base for exploring other planets [1,2]. Given the potential benefits of lunar exploration, Americans, Europeans, Japanese, Chinese, and Indians are all planning to go back to theMoon [3]. After conducting the Apollo Program from 1961 to 1972, NASA officials have not started any new lunar programs. However, this development does not mean that scientists and engineers at NASA have lost interest in the moon. NASA has recently launched Lunar CATALYST, a program designed to assist and encourage private companies that are interested in lunar exploration [4]. In lunar exploration, lunar soft landing is a challenging problem, in which the lunar module (LM) lands softly on the moon surface using the reverse force of the propeller. This study aims to obtain the fuel-optimal trajectory of lunar soft landing with variable thrust. This lunar soft landing trajectory optimization problem is formulated as a constrained optimal control problem incorporated with the main specific features of the problem. Current studies on the lunar soft landing optimal control problem are mainly based on optimal control theory. Ref. [5] applied Pontryagin maximum principle to develop a fuel-optimal thrust program for the terminal phase of a lunar soft-landing mission. Ref. [6] optimized the perilune altitude of the intermediate orbit for lunar landing trajectory in addition to the optimal thrust program. Ref. [7] applied a variable-time-domain neighboring optimal guidance algorithm, which is capable of driving a dynamical system along the specified nominal and optimal paths, to lunardescent and soft landing. Ref. [8] constructed a fuel-optimal guidance law to ensure the soft landing of the LM with the terminal attitude of the module within a small deviation from being vertical with respect to the lunar surface, which is solved by applying the control parameterization technique and a time scaling transform. Ref. [9] outlined a design for a targeting algorithm that quickly and reliably generates a two-dimensional reference trajectory and a real-time three-dimensional guidance algorithm that can use this or any reference trajectory as its basis. Ref. [10] developed a computational method based on control parameterization in conjunction with a time scaling transform and the constraint transcription method to design the optimal controller for the constrained lunar descent optimal control problem. Refs. [1] and [2] conducted the two-dimensional and three-dimensional multiphase trajectory optimization for soft lunar landing from a parking orbit with the pseudospectral method, respectively.
برای دانلود رایگان مقاله بهینه سازی مسیر برای فرود روی ماه اینجا کلیک نمایید.
کلمات کلیدی:
Lunar soft landing trajectory optimization in a 6DoF dynamical model ... epubs.surrey.ac.uk/813199/ by R Armellin - 2011 - Cited by 1 - Related articles Armellin, R, Dowlat, D and Lavagna, M (2011) Lunar soft landing trajectory optimization in a 6DoF dynamical model In: Conference of the European Aerospace ... [PDF]Trajectory optimization for lunar soft landing with a Hamiltonian-based ... iranarze.ir/wp-content/uploads/2016/10/E1067.pdf Aug 9, 2016 - Trajectory optimization. Lunar soft landing. Simultaneous dynamic optimization approach. Adaptive mesh refinement. R-function method. Three-dimensional trajectory optimization of soft lunar landings from ... link.springer.com/article/10.1007/s12555-011-0618-0 by BG Park - 2011 - Cited by 3 - Related articles Dec 2, 2011 - Minimum fuel, three-dimensional trajectory optimization from a parking orbit considering the desired landing site is addressed for soft lunar ... Trajectory optimization for lunar soft landing with ... - ACM Digital Library dl.acm.org/citation.cfm?id=2995136 by L Ma - 2016 - Related articles The problem of lunar soft landing using variable-thrust propulsion is solved by the simultaneous dynamic optimization approach.We propose a novel adaptive ... Rapid Lunar soft-landing trajectory optimization by a Legendre ... https://arc.aiaa.org/doi/abs/10.2514/6.IAC-06-C1.P.4.01 by M Wang - Related articles "Rapid Lunar soft-landing trajectory optimization by a Legendre pseudospectral method", 57th International Astronautical Congress, International Astronautical ... Constrained trajectory optimization of a soft lunar landing from a ... https://dspace.mit.edu/handle/1721.1/32431 by AM Hawkins - 2005 - Cited by 14 - Related articles A trajectory optimization study for a soft landing on the Moon, which analyzed the effects of adding operationally based constraints on the behavior of the ... [PDF]Two-Dimensional Trajectory Optimization for Soft Lunar Landing Con ... past.ijass.org/On_line/admin/files/(288-295)10-013.pdf by BG Park - Cited by 13 - Related articles This paper addresses minimum-fuel, two-dimensional trajectory optimization for a soft lunar landing from a parking orbit to a desired landing site. The landing ...
