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Fast Interplanetary Missions With Low Thrust Propulsion Systems
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Book Synopsis Fast Interplanetary Missions with Low-thrust Propulsion Systems by : W. E. Moeckel
Download or read book Fast Interplanetary Missions with Low-thrust Propulsion Systems written by W. E. Moeckel and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple family of indirect-transfer trajectories between circular orbits is used to evaluate the mass ratio required to complete round-trip interplanetary missions using low-thrust propulsion systems. These trajectories, although not optimum, yielded very substantial reductions in total round-trip time for Mars missions with moderate increases in initial weight. For a powerplant specific weight [alpha] of 10 pounds per kilowatt of jet power, trip times were reduced from 1200 to 600 days, for a typical manned mission, with an initial weight increase of a factor of two. Comparison with a nuclear rocket with 1000-second specific impulse indicated that the electric-propulsion system required less initial weight for trip times as low as 550 days with [alpha]=10 and as low at 400 days with [alpha]=5 pounds per kilowatt. Further weight reductions would be expected with more nearly optimum trajectories.
Book Synopsis Fast Interplanetary Missions with Low-thrust Propulsion Systems by : W. E. Moeckel
Download or read book Fast Interplanetary Missions with Low-thrust Propulsion Systems written by W. E. Moeckel and published by . This book was released on 1961 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Report written by and published by . This book was released on 1960 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Staged Space Propulsion Systems in Interplanetary Missions by : Duane W. Dugan
Download or read book The Role of Staged Space Propulsion Systems in Interplanetary Missions written by Duane W. Dugan and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance prediction for tandem stages of space propulsion systems in interplanetary flight.
Book Synopsis Combined High and Low Thrust Propulsion for Fast Piloted Mars Missions by :
Download or read book Combined High and Low Thrust Propulsion for Fast Piloted Mars Missions written by and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interplanetary Mission Analysis and Design by : Stephen Kemble
Download or read book Interplanetary Mission Analysis and Design written by Stephen Kemble and published by Springer Science & Business Media. This book was released on 2006-09-01 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present impetus to drive down the overall cost of space missions is leading to ever-increasing demands for more efficient design techniques over a wide range of interplanetary missions, and the methods now being utilised to do this are described in this timely and authoritative work.
Book Synopsis Advanced Mission Design by : Hyerim Kim
Download or read book Advanced Mission Design written by Hyerim Kim and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Near-future space missions demand the delivery of massive payloads to deep space destinations. Given foreseeable propulsion technology, this is feasible only if we can design trajectories that require the smallest possible propulsive energy input. This research aims to design interplanetary space missions by using new low-energy trajectory methods that take advantage of natural dynamics in the solar system. This energy efficient trajectory technology, called the Interplanetary Super Highway (IPSH), allows long duration space missions with minimum fuel requirements. To develop the IPSH trajectory design method, invariant manifolds of the three-body problem are used. The invariant manifolds, which are tube-like structures that issue from the periodic orbits around the L1 and L2 Lagrangian points, can be patched together to achieve voyages of immense distances while the spacecraft expends little or no energy. This patched three-body method of trajectory design is fairly well developed for impulsive propulsion. My research is dedicated to advance its capabilities by extending it to continuous, low-thrust, high specific impulse propulsion methods. The IPSH trajectory design method would be useful in designing many types of interplanetary missions. As one of its applications, my research is focused on Near-Earth Asteroids (NEAs) rendezvous mission design for exploration, mitigation, and mining. Asteroids have many valuable resources such as minerals and volatiles, which can be brought back to Earth or used in space for propulsion systems or space habitats and stations. Transportation to and from asteroids will require relatively massive vehicles capable of sustaining crew for long durations while economizing on propellant mass. Thus, in the design of advanced NEA rendezvous missions, developing new technology for low cost trajectories will play a key role. In a second application study, the solar sail mission for Mars exploration is considered. By using solar radiation pressure, solar sails provide propulsive power. This thrust affects the three-body system dynamics such that the Sun-Mars L1 and L2 Lagrangian points are shifted toward the Sun and the geometry of the invariant manifolds around L1 and L2 points is changed. By taking advantage of these features, a low-thrust trajectory for Mars exploration is developed. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155436
Download or read book NASA Technical Report written by and published by . This book was released on 1963 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mars Mission Performance Enhancement with Hybrid Nuclear Propulsion by :
Download or read book Mars Mission Performance Enhancement with Hybrid Nuclear Propulsion written by and published by . This book was released on 1992 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear electric propulsion (NEP), compared with chemical and nuclear thermal propulsion (NTP), can effectively deliver the same mass to Mars using much less propellant, consequently requiring less mass delivered to Earth orbit. The lower thrust of NEP requires a spiral trajectory near planetary bodies, which significantly increases the travel time. Although the total travel time is long, the portion of the flight time spent during interplanetary transfer is shorter, because the vehicle is thrusting for much longer periods of time. This has led to the supposition that NEP, although very attractive for cargo missions, is not suitable for piloted missions to Mars. However, with the application of a hybrid application of a hybrid approach to propulsion, the benefits of NEP can be utilized while drastically reducing the overall travel time required. Development of a dual-mode system, which utilizes high-thrust NTP to propel the spacecraft from the planetary gravitational influence and low-thrust NEP to accelerate in interplanetary space, eliminates the spiral trajectory and results in a much faster transit time than could be obtained by either NEP or NTP alone. This results in a mission profile with a lower initial mass in low Earth orbit. In addition, the propulsion system would have the capability to provide electrical power for mission applications.
Book Synopsis Variable Structure Feedback Control with Application to Spacecraft with Small Thrust Propulsion Systems by : Samuel Kitchen-McKinley
Download or read book Variable Structure Feedback Control with Application to Spacecraft with Small Thrust Propulsion Systems written by Samuel Kitchen-McKinley and published by . This book was released on 2017 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Small spacecrafts requiring small propulsion systems are becoming more popular for low earth orbit. It is important for these research satellites to have accurate guidance and control systems. Small propulsion systems will also be beneficial for multiple small spacecrafts used future exploration expedites beyond low earth orbit. These small spacecrafts benefit from the simplicity of low thrust cold gas propulsion systems. Additionally, large spacecrafts using low thrust, high specific impulse propellants for main propulsion systems, such as ion engines, allow longer and more flexible missions, including earth orbiting spacecraft and interplanetary spacecraft. In order to extent the life of future planetary exploration missions, it becomes necessary to use In-Situ Resource Utilization (ISRU) to be able to extract resources such as water, oxygen, propellants, and building materials form the local target environment. Small free flying vehicles can be used for quickly surveying planetary surfaces in order to search for potential resources locations. These surveying vehicles can also use also use such extracted propellants if their propulsion system is designed for it. Cold gas propulsion provides a flexible system to use locally extracted or manufactured propellants. This dissertation investigates nonlinear feedback control techniques for spacecraft with low thrust, cold gas thrust, and spacecraft with cold gas thrust. A model for a cold gas propulsion systems is developed for designing control systems for multiple types cold gas thrusters. The cold model is also is validated from a cold gas propulsion hardware testing, and a control law is tested on hardware."--Abstract.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1961 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 13th Reinventing Space Conference by : Scott Hatton
Download or read book Proceedings of the 13th Reinventing Space Conference written by Scott Hatton and published by Springer. This book was released on 2018-04-28 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinventing Space is the largest global conference and exhibition for one of the space industry’s fastest growing sectors. Over its 82-year history, the British Interplanetary Society has acted as a forum for new and innovative ideas and developments in astronautics, low-cost access and utilization of space. These conference proceedings reflect the work done at the 13th Reinventing Space Conference, the second biggest space event in the UK during 2015. The global economic climate is creating demand to reduce expenditure, leading to new challenges and opportunities in the world’s space industry. The need to create more responsive systems and launchers that are capable of delivering to space quickly, cheaply and reliably has never been more vital. This collection from RIspace brings together industry, agency, government, financiers, academia and end users. It focuses on the commercialization of space and addresses a range of topics including low-cost launch opportunities, the rebirth of constellations, beyond LEO activities and novel technologies. These papers encourage and promote forward-thinking ideas and concepts for the future exploration and utilization of space. The proceedings address: • New ways of doing business in space – how do we make money on affordable and responsive space missions? • Tactical space systems – how do we best serve the needs of defense missions; civilian missions; the needs of emergency responders? • Interplanetary missions – can we use new technology to explore the Solar System at dramatically lower cost? • What are the methods, processes, and technologies that we can use to make major reductions in the cost of space missions? • New application areas for low-cost space systems – which ones can take advantage of newer, much lower-cost systems? • How do we educate and motivate the coming generation, without whom there won’t be a space industry?
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722912994 Total Pages :24 pages Book Rating :4.9/5 (129 download)
Book Synopsis Trajectory Optimization of an Interstellar Mission Using Solar Electric Propulsion by : National Aeronautics and Space Administration (NASA)
Download or read book Trajectory Optimization of an Interstellar Mission Using Solar Electric Propulsion written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents several mission designs for heliospheric boundary exploration using spacecraft with low-thrust ion engines as the primary mode of propulsion The mission design goal is to transfer a 200-kg spacecraft to the heliospheric boundary in minimum time. The mission design is a combined trajectory and propulsion system optimization problem. Trajectory design variables include launch date, launch energy, burn and coast arc switch times, thrust steering direction, and planetary flyby conditions. Propulsion system design parameters include input power and specific impulse. Both SEP and NEP spacecraft arc considered and a wide range of launch vehicle options are investigated. Numerical results are presented and comparisons with the all chemical heliospheric missions from Ref 9 are made. Kluever, Craig A. Glenn Research Center NAG3-1731...
Book Synopsis Advanced Hybrid Nuclear Propulsion Mars Mission Performance Enhancement by :
Download or read book Advanced Hybrid Nuclear Propulsion Mars Mission Performance Enhancement written by and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear electric propulsion (NEP), compared with chemical and nuclear thermal propulsion (NTP), can effectively deliver the same mass to Mars using much less propellant, consequently requiring less mass delivered to Earth orbit. The lower thrust of NEP requires a spiral trajectory near planetary bodies, which significantly increases the travel time. Although the total travel time is long, the portion of the flight time spent during interplanetary transfer is shorter, because the vehicle is thrusting for much longer periods of time. This has led to the supposition that NEP, although very attractive for cargo missions, is not suitable for piloted missions to Mars. However, with the application of a hybrid approach to propulsion, the benefits of NEP can be utilized while drastically reducing the overall travel time required. Development of a dual-mode system, which utilizes high-thrust NTP to propel the spacecraft from the planetary gravitational influence and low-thrust NEP to accelerate in interplanetary space, eliminates the spiral trajectory and results in a much faster transit time than could be obtained by either NEP or NTP alone. This results in a mission profile with a lower initial mass in low Earth orbit. In addition, the propulsion system would have the capability to provide electrical power for mission applications.
Book Synopsis Microwave Power Engineering by : Ernest C. Okress
Download or read book Microwave Power Engineering written by Ernest C. Okress and published by Academic Press. This book was released on 2013-10-22 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave Power Engineering, Volume 2: Applications introduces the electronics technology of microwave power and its applications. This technology emphasizes microwave electronics for direct power utilization and transmission purposes. This volume presents the accomplishments with respect to components, systems, and applications and their prevailing limitations in the light of knowledge of the microwave power technology. The applications discussed include the microwave heating and other processes of materials, which utilize the magnetron predominantly. Other applications include microwave ionized gases for chemical processing, space (propulsion), and scientific (controlled nuclear fusion) purposes; particle accelerators for scientific, medical, and industrial purposes; military and aerospace for phased array focused microwave energy, experimental vehicle hovering; and dynamics, for experimental microwave motors and experimental waveguide vehicle transport. This text also provides recommendations with respect to what can be done to accelerate a balanced growth of the subject and to attract more creative interest and support.
Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1967 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical Study of Soft Landings on Gas-filled Bags by : Jack B. Esgar
Download or read book Analytical Study of Soft Landings on Gas-filled Bags written by Jack B. Esgar and published by . This book was released on 1960 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
