Download or read book Development of a Mars Airplane Entry Descent and Flight Trajectory written by James E. Murray and published by . This book was released on 2001 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Entry Descent and Landing of a Low Mass System at Mars written by Oscar Toledo Farrando and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the Mariner 4 Martian mission, which was the rst one in succeeding in the red planet, the spatial race to study Mars has experimented a huge growth. One of its challenges is to deal with the thin atmosphere of the red planet, which demands very accurate design of the entry, descent and landing (EDL) system. This thesis develops a preliminary design of the EDL system of a small payload (see (Pasolini et al., 2017)), which consists of an aeroshell system for the reentry and the hypersonic and supersonic phases. Once the capsule has reached a subsonic velocity, a parachute is used for descent in the last ight phase. This project also includes the development of a parametric ight simulator to calculate the trajectory of the capsule. A CFD model is used to calculate the aerodynamic parameters of the hypersonic and supersonic phases. For the subsonic ight, as there is a wide variety of results in the literature, a suitable parachute model is selected from existing experimental data.
Download or read book Landing Site Dispersions of an Uncontrolled Lander on Mars written by John S. White and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Spacecraft Atmospheric Entry Guidance written by Joel Benito Manrique and published by . This book was released on 2010 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to advance entry guidance technology two different research areas have been explored with the objective of increasing the reachable landing area and the landing accuracy for future Mars missions. Currently only the northern hemisphere of Mars is available for landing due to its low elevation. Only low elevation landing sites have the necessary atmospheric density to allow landing using current Entry, Descent and Landing (EDL) technology. In order to reach most of the Ancient Highlands, the majority of the southern hemisphere, advanced EDL technology is needed in multiple fields, including entry guidance. The first research area is the definition and applications of reachable and controllable sets for entry. The definition of the reachable and controllable sets provides a framework for the study of the capabilities of an entry vehicle in a given planet. Reachable and controllable sets can be used to comprehensively characterize the envelope of trajectories that a vehicle can fly, the sites it can reach and the entry states that can be accommodated. The sets can also be used for the evaluation of trajectory planning algorithms and to assist in the selection of the entry or landing sites. In essence, the reachable and controllable sets offer a powerful vehicle and trajectory analysis and design framework that allows for better mission design choices. In order to illustrate the use of the sets, they are computed for a representative Mars mission using two different vehicle configurations. The sets characterize the impact of the vehicle configuration on the entry capability. Furthermore, the sets are used to find the best skip-entry trajectory for a return from the Moon mission, highlighting the utility of the sets in atmospheric maneuvers other than entry. The second research area is the development of the components of an entry guidance algorithm that allow high elevation landing and provide as well high landing accuracy. The approach taken follows the acceleration guidance approach successfully used in missions like the Space Shuttle. Based on this approach, a new planner has been developed that is computationally fast and provides trajectories with both high final altitude and high control authority. A new tracking law based on nonlinear predictive control has been developed to track the reference trajectory. The new tracking law accounts for control saturation, which is a common feature of trajectories in the thin Martian atmosphere with a low lift vehicle. Finally, a final position guidance algorithm that aligns the vehicle's heading towards the target and provides altitude and range control, has been developed. The new guidance algorithm provides increased accuracy as well as higher final altitude compared to an entry guidance algorithm representative of the current capabilities.
Download or read book The International Atlas of Mars Exploration Volume 1 1953 to 2003 written by Philip J. Stooke and published by Cambridge University Press. This book was released on 2012-09-24 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the first five decades of the exploration of Mars, this atlas is the most detailed visual reference available. It brings together, for the first time, a wealth of information from diverse sources, featuring annotated maps, photographs, tables and detailed descriptions of every Mars mission in chronological order, from the dawn of the space age to Mars Express. Special attention is given to landing site selection, including reference to some missions that were planned but never flew. Phobos and Deimos, the tiny moons of Mars, are covered in a separate section. Contemporary maps reveal our improving knowledge of the planet's surface through the latter half of the twentieth century. Written in non-technical language, this atlas is a unique resource for anyone interested in planetary sciences, the history of space exploration and cartography, while the detailed bibliography and chart data are especially useful for academic researchers and students.
Download or read book Planetary Flight Handbook written by United States. National Aeronautics and Space Administration and published by . This book was released on 1968 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 29th International Symposium on Shock Waves 2 written by Riccardo Bonazza and published by Springer. This book was released on 2015-07-10 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings present the results of the 29th International Symposium on Shock Waves (ISSW29) which was held in Madison, Wisconsin, U.S.A., from July 14 to July 19, 2013. It was organized by the Wisconsin Shock Tube Laboratory, which is part of the College of Engineering of the University of Wisconsin-Madison. The ISSW29 focused on the following areas: Blast Waves, Chemically Reactive Flows, Detonation and Combustion, Facilities, Flow Visualization, Hypersonic Flow, Ignition, Impact and Compaction, Industrial Applications, Magnetohydrodynamics, Medical and Biological Applications, Nozzle Flow, Numerical Methods, Plasmas, Propulsion, Richtmyer-Meshkov Instability, Shock-Boundary Layer Interaction, Shock Propagation and Reflection, Shock Vortex Interaction, Shock Waves in Condensed Matter, Shock Waves in Multiphase Flow, as well as Shock Waves in Rarefield Flow. The two Volumes contain the papers presented at the symposium and serve as a reference for the participants of the ISSW 29 and individuals interested in these fields.
Download or read book Research Engineering written by and published by . This book was released on 2000 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Difficult Road to Mars written by V. G. Perminov and published by BiblioGov. This book was released on 2013-06 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perminov was the leading designer for Mars and Venus spacecraft at the Soviet Lavochkin design bureau in the early days of Martian exploration. In addition to competing with the U.S. to get to the Moon, the Soviets also struggled to beat the U.S. to Mars during the Cold War. Throughout the 1960s and 1970s, the Soviets attempted to send a number of robotic probes to Mars, but for a variety of reasons, most of these missions ended in failure. Despite these overall failures, the Soviets garnered a great deal of scientific and technical knowledge through these efforts. This monograph tells some fascinating, but little-known, stories.
Download or read book Trajectory Optimization and Guidance Methods for Mars Entry written by Shuang Li and published by Springer Nature. This book was released on with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of High speed Convective Heat transfer Computation Methods written by Michael E. Tauber and published by . This book was released on 1989 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mars Science Laboratory Entry Descent and Landing Instrumentation written by National Aeronautics and Space Administration and published by Createspace Independent Publishing Platform. This book was released on 2017-01-17 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: On August 6, 2012 (1:31 AM EDT), the Mars Science Laboratory (MSL) successfully traversed the atmosphere to land on Mars. But by the time the sky crane lowered the Curiosity rover to the surface, one experiment (the MSL Entry Descent and Landing (EDL) Instrumentation (MEDLI) suite) had already collected all of its data. For the entire atmospheric entry phase, from just before atmospheric interface until it was powered off approximately 10 seconds after the parachute was deployed, MEDLI monitored the entry vehicle's surface pressures and heatshield temperatures. MEDLI delivered the first in-depth understanding of the Mars entry environments and the response of the entry vehicle to those environments. Previous Mars entry missions assessed their entry performance (vehicle drag and stability) via the observed initial states coupled with the onboard inertial measurement unit (IMU) data. This approach is devoid of environmental measurements, so total drag force cannot be decomposed into aerodynamics and atmospheric conditions. In addition, no through-thickness measurements to ascertain heatshield thermal protection system (TPS) performance were taken on previous entry missions. MEDLI culminated decades of advocacy by the EDL community for entry vehicle instrumentation. The fate of the Genesis and Stardust sample return missions served as an impetus for this advocacy. On September 8, 2004, an incorrectly installed g-trigger did not command deployment of its drogue chute, and the Genesis capsule tumbled through the atmosphere. The plan had called for a mid-air retrieval via its slow-descent parafoil to avoid landing impact loads, but instead the parafoil did not deploy and the Genesis capsule crashed into the ground. The minimal EDL data available from Genesis also slowed the mishap investigation. Sixteen months later, on January 15, 2006, a successful Stardust return prompted the NASA Administrator to request an assessment of how the vehicle performed. Since the capsule was not instrumented, the ability to quantify vehicle stability and drag performance, as well as the heating environment and the response of the TPS to that environment, was limited. As a result, the Administrator mandated that NASA should instrument all future atmospheric entry systems.
Download or read book AIAA Aerospace Sciences Meeting and Exhibit 42nd written by and published by . This book was released on 2004 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Multiple Techniques for the Reconstruction of Entry Descent and Landing Trajectories and Atmospheres written by Grant Wells and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary importance of trajectory reconstruction is to assess the accuracy of pre-flight predictions of the entry trajectory. While numerous entry systems have flown, often these systems are not adequately instrumented or the flight team not adequately funded to perform the statistical engineering reconstruction required to quantify performance and feed-forward lessons learned into future missions. As such, entry system performance and reliability levels remain unsubstantiated and improvement in aerothermodynamic and flight dynamics modeling remains data poor. The comparison is done in an effort to quantitatively and qualitatively compare Kalman filtering methods of reconstructing trajectories and atmospheric conditions from entry systems flight data. The first Kalman filter used is the extended Kalman filter. Extended Kalman filtering has been used extensively in trajectory reconstruction both for orbiting spacecraft and for planetary probes. The second Kalman filter is the unscented Kalman filter. Additionally, a technique for using collocation to reconstruct trajectories is formulated, and collocation's usefulness for trajectory simulation is demonstrated for entry, descent, and landing trajectories using a method developed here to deterministically find the state variables of the trajectory without nonlinear programming. Such an approach could allow one to utilize the same collocation trajectory design tools for the subsequent reconstruction.
Download or read book Aerospace America written by and published by . This book was released on 2006 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planetary Flight Handbook written by and published by . This book was released on 1963 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mars Science Laboratory MSL entry descent and landing instrumentation MEDLI written by F. McNeil Cheatwood and published by . This book was released on 2014 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
