Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Edward Mettler"'
Publikováno v:
Acta Astronautica. 65:766-786
The baseline Jupiter Icy Moons Orbiter (JIMO) spacecraft presented challenging controls–structure interactions caused by having to accurately and simultaneously point the existing multiple articulated payloads (high-gain antenna, scan platform) whi
Autor:
John A. Shivik, Alex Edward Mettler
Publikováno v:
Applied Animal Behaviour Science. 102:85-94
Previous research suggests that within social animals, subordinate individuals are less neophobic than dominant individuals. We investigated the effect of social status on neophobic responses using 10 captive coyote breeding pairs. Social status was
Publikováno v:
The Journal of the Astronautical Sciences. 53:391-412
In this paper we summarize a concept definition and feasibility analysis for formation flying a representative large space telescope composed of separated optical elements. A virtual-structure construct (an equivalent rigid body) is created by unique
Publikováno v:
Journal of Guidance, Control, and Dynamics. 25:309-315
Theinitial stageofa complex system design involvesunderstanding and evaluationof various plant architecture. Theconventionalapproachistoselectthecone gurationofchoiceviaanexhaustiveperformanceevaluationprocess. The procedure involves designing primit
Publikováno v:
Automatica. 27:931-946
Recent experiences in the field of flexible structure control in space have indicated a need for on-orbit system identification to support robust control redesign to avoid in-flight instabilities and maintain high spacecraft performance. This paper h
Publikováno v:
Proceedings of 1994 American Control Conference - ACC '94.
This paper describes the Modeling and Control Synthesis (MACSYN) Toolbox, which is an integrated software package for system identification, modeling, and robust control. Using MACSYN, the plant is identified in state-space form, and modeling errors
Publikováno v:
AIAA Guidance, Navigation, and Control Conference and Exhibit.
In this paper we develop a robust nonlinear algorithm for the attitude control of a solar sailcraft with M single degree-of-freedom articulated control vanes. A general attitude controller that tracks an admissible trajectory while rejecting disturba
Autor:
Eldred F. Tubbs, Ahmet Behcet Acikmese, William G. Breckenridge, Steven A. Macenka, Edward Mettler
Publikováno v:
AIAA/AAS Astrodynamics Specialist Conference and Exhibit.
The Earth Observatory Formation at L2, a Lagrange libration point, is a unique large aperture (25 m diameter) space telescope concept that will improve the knowledge and understanding of dynamic, chemical and radiative mechanisms that cause changes i
Publikováno v:
AIAA/AAS Astrodynamics Specialist Conference and Exhibit.
The dynamics and control challenges presented by a conceptual Jovian Moon Tour spacecraft are summarized in this paper. Attitude and orbital dynamics interactions are present due to the designed low-thrust trajectory, and controls structure interacti
Autor:
Edward Mettler, Eldred F. Tubbs, Steven A. Mecenka, William G. Breckenridge, A. Behcet Acikmese
Publikováno v:
Space 2004 Conference and Exhibit.
This paper is a product of research supported by NASA under RASC (the Revolutionary Aerospace Systems Concepts) program. It presents an overall system architecture, and covers issues of deployment, navigation, and control related to a formation of tw