Optimal Three Dimensional Launch Vehicle Trajectories with Attitude and Attitude Rate Constraints PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Optimal Three Dimensional Launch Vehicle Trajectories with Attitude and Attitude Rate Constraints PDF full book. Access full book title Optimal Three Dimensional Launch Vehicle Trajectories with Attitude and Attitude Rate Constraints by Fred Teren. Download full books in PDF and EPUB format.
Author: Fred Teren
Publisher:
ISBN:
Category : Launch vehicles (Astronautics)
Languages : en
Pages : 58
Get Book Here
Book Description
Author: Fred Teren
Publisher:
ISBN:
Category : Launch vehicles (Astronautics)
Languages : en
Pages : 58
Get Book Here
Book Description
Author: Fred Teren
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Get Book Here
Book Description
Author: Fred Teren
Publisher:
ISBN:
Category :
Languages : en
Pages : 47
Get Book Here
Book Description
Author: Peter F. Gath
Publisher: diplom.de
ISBN: 383241973X
Category : Technology & Engineering
Languages : en
Pages : 103
Get Book Here
Book Description
Inhaltsangabe:Abstract: This thesis presents improvements to FLOAT, a hybrid analytical/numerical algorithm for rapid generation of three dimensional, optimal launch vehicle ascent trajectories. Improvements have been made to the terminal constraints, which are now available in a more general form to allow for an optimal attachment point to the target orbit.The existing algorithm also has been extended with logic that allows for vehicles with low thrust to weight ratios in the upper stage and successful convergence of problems with path constraints for normal force and angle of attack Another major extension made to the code is the introduction of coasting arcs. Coasting arcs are implemented using a completely analytical solution for the prediction of states and costates as well as for the required sensitivity matrix. This allows for a very fast and accurate calculation even with long coasting arcs. Finally, an approach for the optimization of start and end time of coast arcs is presented.This approach was implemented and the results of a test case compare very well with results generated with OTIS for the same case. At the end, suggestions for future development are made. Inhaltsverzeichnis:Table of Contents: Summaryi Acknowledgementsii Contentsiii Nomenclaturev Figuresviii Introduction1 1.Problem description3 1.1Describing the final orbit3 1.2Coordinate frame5 1.3Dynamic system6 1.4Initial conditions7 1.5Path constraints7 1.6Performance index7 1.7Terminal constraints8 1.8Solution method8 1.9Non-dimensionalization of the variables9 2.Solving the two-point boundary value problem10 2.1Vacuumsolution10 2.1.1Simplified model equations10 2.1.2Optimal control for vacuum solution11 2.1.3Thrust integrals and closed form solution for ascent in vacuum12 2.2Atmospheric solution13 2.2.1Dynamic system and collocation variables13 2.2.2Optimality condition to solve for 1b14 2.2.3Differential equations for the costate variables16 2.3Terminal constraints16 2.3.1Attaching at perigee17 2.3.2Free attachment point17 2.4Transversality conditions18 2.4.1Final costates for attaching at perigee18 2.4.2Final costates for free attachment point19 2.4.3Equatorial orbits22 2.5Adjusting final time22 2.6Computation procedure23 2.7Numerical results24 3.Low thrust upper stages27 3.1Typical low thrust case27 3.2Problems with low thrust upper stages28 3.3Upper stage modification30 3.4Advantage of free attachment point for low thrust [...]
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 470
Get Book Here
Book Description
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 956
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 710
Get Book Here
Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1504
Get Book Here
Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1464
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 392
Get Book Here
Book Description
