Approximate Optimal Guidance for the Advanced Launch System PDF Download

Author: T. S. Feeley
Publisher:
ISBN:
Category : Launch vehicles (Astronautics)
Languages : en
Pages : 168

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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722949082
Category :
Languages : en
Pages : 164

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A real-time guidance scheme for the problem of maximizing the payload into orbit subject to the equations of motion for a rocket over a spherical, non-rotating earth is presented. An approximate optimal launch guidance law is developed based upon an asymptotic expansion of the Hamilton - Jacobi - Bellman or dynamic programming equation. The expansion is performed in terms of a small parameter, which is used to separate the dynamics of the problem into primary and perturbation dynamics. For the zeroth-order problem the small parameter is set to zero and a closed-form solution to the zeroth-order expansion term of Hamilton - Jacobi - Bellman equation is obtained. Higher-order terms of the expansion include the effects of the neglected perturbation dynamics. These higher-order terms are determined from the solution of first-order linear partial differential equations requiring only the evaluation of quadratures. This technique is preferred as a real-time, on-line guidance scheme to alternative numerical iterative optimization schemes because of the unreliable convergence properties of these iterative guidance schemes and because the quadratures needed for the approximate optimal guidance law can be performed rapidly and by parallel processing. Even if the approximate solution is not nearly optimal, when using this technique the zeroth-order solution always provides a path which satisfies the terminal constraints. Results for two-degree-of-freedom simulations are presented for the simplified problem of flight in the equatorial plane and compared to the guidance scheme generated by the shooting method which is an iterative second-order technique. Feeley, T. S. and Speyer, J. L. Unspecified Center ADVANCED LAUNCH SYSTEM (STS); APPROXIMATION; ASYMPTOTIC SERIES; BELLMAN THEORY; DYNAMIC PROGRAMMING; HAMILTON-JACOBI EQUATION; OPTIMAL CONTROL; PERTURBATION THEORY; SERIES EXPANSION; TRAJECTORY OPTIMIZATION; AERODYNAMIC FORCES; EQUATIONS OF MOTION; GUIDANCE (MOTION); METHOD OF C...

Author: Anthony J. Calise
Publisher:
ISBN:
Category : Launch vehicles (Astronautics)
Languages : en
Pages : 112

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702

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Author: James M Longuski
Publisher: Springer Science & Business Media
ISBN: 1461489458
Category : Technology & Engineering
Languages : en
Pages : 286

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Want to know not just what makes rockets go up but how to do it optimally? Optimal control theory has become such an important field in aerospace engineering that no graduate student or practicing engineer can afford to be without a working knowledge of it. This is the first book that begins from scratch to teach the reader the basic principles of the calculus of variations, develop the necessary conditions step-by-step, and introduce the elementary computational techniques of optimal control. This book, with problems and an online solution manual, provides the graduate-level reader with enough introductory knowledge so that he or she can not only read the literature and study the next level textbook but can also apply the theory to find optimal solutions in practice. No more is needed than the usual background of an undergraduate engineering, science, or mathematics program: namely calculus, differential equations, and numerical integration. Although finding optimal solutions for these problems is a complex process involving the calculus of variations, the authors carefully lay out step-by-step the most important theorems and concepts. Numerous examples are worked to demonstrate how to apply the theories to everything from classical problems (e.g., crossing a river in minimum time) to engineering problems (e.g., minimum-fuel launch of a satellite). Throughout the book use is made of the time-optimal launch of a satellite into orbit as an important case study with detailed analysis of two examples: launch from the Moon and launch from Earth. For launching into the field of optimal solutions, look no further!

Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1168

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Author:
Publisher:
ISBN:
Category : Adaptive control systems
Languages : en
Pages : 1218

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Author: C.T. Leonides
Publisher: Elsevier
ISBN: 032316319X
Category : Transportation
Languages : en
Pages : 563

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Book Description
Control and Dynamic Systems: Advances in Theory and Applications, Volume 52: Integrated Technology Methods and Applications in Aerospace System Design discusses the various techniques and applications in aerospace systems. This book presents automation and integration techniques in optimizing aircraft structural design. It also covers a number of technologies used in aerospace systems such as active flutter suppression, flight control configuration, aeroassisted plane change missions, flight control systems, and impaired aircraft. This book concludes by demonstrating some modeling issues in command, control, and communication networks. This book is a significant reference source for engineers involved in aerospace systems design.

Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 856

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Author:
Publisher:
ISBN:
Category : Automatic control
Languages : en
Pages : 1036

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