Multiple Gravity Assist Interplanetary Trajectories - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Multiple Gravity Assist Interplanetary Trajectories write by OV Papkov. This book was released on 2017-11-01. Multiple Gravity Assist Interplanetary Trajectories available in PDF, EPUB and Kindle. Reflecting the results of twenty years; experience in the field of multipurpose flights, this monograph includes the complex routes of the trajectories of a number of bodies (e.g., space vehicles, comets) in the solar system. A general methodological approach to the research of flight schemes and the choice of optimal performances is developed. Additionally, a number of interconnected methods and algorithms used at sequential stages of such development are introduced, which allow the selection of a rational multipurpose route for a space vehicle, the design of multipurpose orbits, the determination of optimal space vehicle design, and ballistic performances for carrying out the routes chosen. Other topics include the practical results obtained from using these methods, navigation problems, near-to-planet orbits, and an overview of proven and new flight schemes.
Multiple Gravity Assist Interplanetary Trajectories
Multiple Gravity Assist Interplanetary Trajectories - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Multiple Gravity Assist Interplanetary Trajectories write by A V Labunsky. This book was released on 1998-11-26. Multiple Gravity Assist Interplanetary Trajectories available in PDF, EPUB and Kindle. Reflecting the results of twenty years; experience in the field of multipurpose flights, this monograph includes the complex routes of the trajectories of a number of bodies (e.g., space vehicles, comets) in the solar system. A general methodological approach to the research of flight schemes and the choice of optimal performances is developed. Additionally, a number of interconnected methods and algorithms used at sequential stages of such development are introduced, which allow the selection of a rational multipurpose route for a space vehicle, the design of multipurpose orbits, the determination of optimal space vehicle design, and ballistic performances for carrying out the routes chosen. Other topics include the practical results obtained from using these methods, navigation problems, near-to-planet orbits, and an overview of proven and new flight schemes.
Design of Interplanetary Trajectories with Multiple Synergetic Gravitational Assist Maneuvers Via Particle Swarm Optimization
Design of Interplanetary Trajectories with Multiple Synergetic Gravitational Assist Maneuvers Via Particle Swarm Optimization - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Design of Interplanetary Trajectories with Multiple Synergetic Gravitational Assist Maneuvers Via Particle Swarm Optimization write by Matthew Shaw. This book was released on 2018. Design of Interplanetary Trajectories with Multiple Synergetic Gravitational Assist Maneuvers Via Particle Swarm Optimization available in PDF, EPUB and Kindle. The design capacity for synergetic gravity assists (powered flyby's) changes the type of possible optimal trajectories to distant planets. Heuristic optimization methods have potential to produce useful trajectories for design purposes. The application of Particle Swarm Optimization (PSO) is used to determine optimal mission trajectories from Earth to planets of interest, subject to synergetic gravity assist maneuver(s) in between. In order to verify the results from PSO, past missions are re-examined from a new design perspective. The trajectories designed by aid of PSO are compared to the trajectories involving the real mission dates. Test results are obtained for Voyager 1, Voyager 2, and Cassini. The results closely resemble those of actual mission data, providing support for the new design method involving PSO and synergetic gravitational assists. The computation of these solutions offers the unique benefit of costing one to two minutes of wall clock time with standard desktop or laptop computing systems. In addition to the past missions that are considered for re-design, the work then extends the design method to a newly proposed multiple gravity-assist mission from Earth to Saturn that could take place within the next few years. Two different mission timelines are considered. Direct routes and multiple gravity assist (MGA) routes to Saturn are compared. The best solutions from PSO for the MGA routes are on an order of one half to one third the propellant cost as compared to the direct routes for the launch and arrival dates chosen. Finally, consideration for promising future research directions involving PSO and synergetic gravity assist maneuvers is discussed.
Study
Study - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Study write by Esther Mas Sanz. This book was released on 2018. Study available in PDF, EPUB and Kindle. In recent years space exploration has become more and more prolific. Its nature has changed, from a public state-funded (rather unusual) activity with a main goal of challenging human and physical barriers to a private industry that has seen the opportunity to take advantage of resources outside Earth. An industry that could provide the solution for the unsustainable demand in energy and basic resources generated by an exponentially increasing population. Certainly, space exploration is nowadays far away from overtaking long ago established industries such as fossil fuels. Why chasing an asteroid when you could dig oil out on Earth and at lower costs? The answer is simple: one day no resources will be left. Several companies dedicated to space exploration and exploitation do have scheduled projects for the years to come, and mission design is key for success. Natural Gravity Assist is just one of the many different approaches a space mission can implement, depending on the size of the payload (so, consequently the spacecraft), the trajectory and celestial bodies that affect it, or even its primary goal: a satellite probe for a first scientific scanning or a two-way mission involving launches and landings? Nevertheless, implementing the Natural Gravity Assist manoeuvre is a paramount contribution: using the gravitational field of other planets allows to shape the trajectory and even more remarkable, it saves fuel. One can find a huge amount of research papers and literature dealing with the Natural Gravity Assist problem and formulation, however, those solutions are predominantly in the form of scalar equations, crowded with angles and impossible to intuitively imagine the geometry. In this paper a new analytic model is proposed relying on vector algebra making it more robust, concise and elegant. This method is tested with benchmark runs reproducing the well-known Voyager 1 mission and later on obtaining by optimization (again) Voyager 1, Voyager 2 and Mariner 10. Eventually, two asteroid-rendezvous missions (to Ryugu and Nereus, both asteroids being a current target for mining companies) are simulated. Benchmark runs successfully achieve to reproduce the real missions while asteroid rendezvous missions improve considerably fuel consumption in contrast to direct transfers. However, the results per se do not constitute the most substantial part of this research, but the restrictions, considerations and limitations around them. All of these three set a starting point for other research branches and a deeper understanding of celestial mechanics problems, simultaneous optimization for many variables, search space pruning, etc.
Lunar and Interplanetary Trajectories
Lunar and Interplanetary Trajectories - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Lunar and Interplanetary Trajectories write by Robin Biesbroek. This book was released on 2015-12-23. Lunar and Interplanetary Trajectories available in PDF, EPUB and Kindle. This book provides readers with a clear description of the types of lunar and interplanetary trajectories, and how they influence satellite-system design. The description follows an engineering rather than a mathematical approach and includes many examples of lunar trajectories, based on real missions. It helps readers gain an understanding of the driving subsystems of interplanetary and lunar satellites. The tables and graphs showing features of trajectories make the book easy to understand.
