Author: Anthony Baker PagePublisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 164
Book Description
Piecewise-constant Control Strategies for Use in Minimum Fuel Aeroassisted Orbital Transfers
Author: Anthony Baker PagePublisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 164
Book Description
Piecewise Constant Guidance for Aeroassisted Orbit Transfer
Author: Peter Alexander BidianPublisher:
ISBN:
Category :
Languages : en
Pages : 310
Book Description
Fuel-Optimal Trajectories of Aeroassisted Orbital Transfer with Plane Change
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722410049
Category :
Languages : en
Pages : 64
Book Description
The problem of minimization of fuel consumption during the atmospheric portion of an aeroassisted, orbital transfer with plane change is addressed. The complete mission has required three characteristic velocities, a deorbit impulse at high earth orbit (HEO), a boost impulse at the atmospheric exit, and a reorbit impulse at low earth orbit (LEO). A performance index has been formulated as the sum of these three impulses. Application of optimal control principles has led to a nonlinear, two-point, boundary value problem which was solved by using a multiple shooting algorithm. The strategy for the atmospheric portion of the minimum-fuel transfer is to start initially with the maximum positive lift in order to recover from the downward plunge, and then to fly with a gradually decreasing lift such that the vehicle skips out of the atmosphere with a flight path angle near zero degrees. Naidu, Desineni Subbaramaiah and Hibey, Joseph L. Unspecified Center...
Aeroassisted Orbital Transfer
Author: D.Subbaram NaiduPublisher: Springer
ISBN: 9783662182536
Category : Technology & Engineering
Languages : en
Pages : 182
Book Description
The concept of aeroassisting for orbital transfer has been recognized as one of the critical technologies for pioneering the space frontier. In space transportation systems, aeroassisting (or aerobraking), defined as the deceleration resulting from the effects of atmospheric drag upon a vehicle during orbital operations, opens new mission opportunities, especially with regard to the establishment of the permanent Space Station Freedom and space explorations to other planets such as Mars. The main areas of research reported in this monograph are atmospheric entry problem by the method of matched asymptotic expansions, coplanar and non-coplanar orbital transfers with aeroassist technology, orbital plan change with aerocruise, and neighbouring optimal guidance. A special feature is the bibliography which will provide the reader with a literature status for further research.
Aeroassisted Orbital Transfer
Author: Desineni S. NaiduPublisher: Springer Verlag
ISBN: 9780387198194
Category : Technology & Engineering
Languages : en
Pages : 178
Book Description
The concept of aeroassisting for orbital transfer has been recognized as one of the critical technologies for pioneering the space frontier. In space transportation systems, aeroassisting (or aerobraking), defined as the deceleration resulting from the effects of atmospheric drag upon a vehicle during orbital operations, opens new mission opportunities, especially with regard to the establishment of the permanent Space Station Freedom and space explorations to other planets such as Mars. The main areas of research reported in this monograph are atmospheric entry problem by the method of matched asymptotic expansions, coplanar and non-coplanar orbital transfers with aeroassist technology, orbital plan change with aerocruise, and neighbouring optimal guidance. A special feature is the bibliography which will provide the reader with a literature status for further research.
International Aerospace Abstracts
Author: Minimum Fuel Continuous Low Thrust Orbital Transfer
Author: Eugene A. SmithPublisher:
ISBN:
Category :
Languages : en
Pages : 93
Book Description
Minimum fuel continuous low thrust orbit transfer is an optimal control problem which requires the application of iterative numerical methods to solve the resulting two point boundary value problem. A combination gradient- neighboring extremal algorithm gives accurate results when both the initial and terminal orbits are coplanar. These results are then used to extend the problem to include out-of-plane transfers between orbits of widely varying inclination. Control histories, in terms of thrust direction, are plotted as a function of time for both coplanar and non-coplanar transfers. Steering programs for coplanar transfers are characterized by a rapid thrust reversal which is dependent on eccentricity for the time of its occurrence. In the latter case, out-of-plane thrusting is primarily a function of the inclination change between orbits. On the basis of these results, the particular numerical approach used provides an effective method for generating optimal low thrust orbital transfer guidance.
Optimal Aeroassisted Coplanar Orbital Transfer Using an Energy Model
Author: Aeroassisted Orbit Transfer Vehicle Trajectory Analysis
Author: Fuel-optimal Trajectories of Aeroassisted Orbital Transfer with Plane Change
Author: Desineni S. NaiduPublisher:
ISBN:
Category : Orbital transfer (Space flight)
Languages : en
Pages : 120
Book Description