1,721,082 research outputs found
Axisymmetric Swirling Flows in Underexpanded Jets
No full textPubbl. N. PP205, Istututo di Macchine e Motori per Aeromobili, Torin
Indirect optimization of finite-thrust cooperative rendezvous
No full textA time-constrained finite-thrust rendezvous between two cooperating spacecraft is investigated in detail in this paper. To ensure high numerical accuracy, the optimization is carried out by means of an indirect method that exploits an “a priori” subdivision of the trajectory into burn and coast arcs, whose time lengths become additional
unknown parameters. Issues related to simultaneous presence of two switching control structures, one for each maneuvering spacecraft, are analyzed. A peculiar approach, which relies on the adoption of a different timescale for each spacecraft, is proposed; the introduction of multiple decision vectors allows for an easy management of the
switching control structures for missions involving two or more maneuvering spacecraft. As an example, a coplanarrendezvous is thoroughly analyzed; necessary conditions for optimality are comprehensively derived for both target/chaser and cooperative maneuvers. Numerical results are provided and solutions are discussed
Trade-off Between Payload and Trip-Time for EP Interplanetary Missions
No full textPaper AIAA 2004-380
A Finite Difference Method Based on Bicharacteristics for Solving Multidimensional Hyperbolic Flows
No full textPubbl. N. PP217, Istututo di Macchine e Motori per Aeromobili, Torin
Campo di moto potenziale incompressibile attorno a un profilo alare in una galleria di forma arbitraria
No full text- …
