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Hopkins, Randy

Publications and source records attributed to Hopkins, Randy.

5 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2011

The MSFC Collaborative Engineering Process for Preliminary Design and Concept Definition Studies

This paper describes a collaborative engineering process developed by the Marshall Space Flight Center's Advanced Concepts Office for performing rapid preliminary design and mission concept definition studies for potential future NASA missions. The process has been developed and demonstrated for a broad range of mission studies including human space exploration missions, space transportation system studies and in-space science missions. The paper will describe the design team structure and specialized analytical tools that have been developed to enable a unique rapid design process. The collaborative engineering process consists of integrated analysis approach for mission definition, vehicle definition and system engineering. The relevance of the collaborative process elements to the standard NASA NPR 7120.1 system engineering process will be demonstrated. The study definition process flow for each study discipline will be will be outlined beginning with the study planning process, followed by definition of ground rules and assumptions, definition of study trades, mission analysis and subsystem analyses leading to a standardized set of mission concept study products. The flexibility of the collaborative engineering design process to accommodate a wide range of study objectives from technology definition and requirements definition to preliminary design studies will be addressed. The paper will also describe the applicability of the collaborative engineering process to include an integrated systems analysis approach for evaluating the functional requirements of evolving system technologies and capabilities needed to meet the needs of future NASA programs.

Mulqueen, Jack↗
NASA NTRS2009

Xenia Spacecraft Study

This slide presentation reviews the proposed design for the Xenia mission spacecraft. The goal of this study is to perform a mission concept study for the mission. Included in this study are: the overall ground rules and assumptions (GR&A), a mission analysis, the configuration, the mass properties, the guidance, Navigation and control, the proposed avionics, the power system, the thermal protection system, the propulsion system, and the proposed structures. Conclusions from the study indicate that the observatory fits within the Falcon 9 mass and volume envelope for launching from Omelek, the pointing, slow slewing, and fast slewing requirements and the thermal requirements are met.

Hopkins, Randy↗
NASA NTRS2008

Xenia Spacecraft Study

This slide presentation reviews the mission concept for the proposed Xenia mission. The mission's ground rules and assumptions for the mission analysis, attitude and orbit control, propulsion, avionics, power, and the thermal controls are reviewed, partially to determine the appropriate launch vehicle that will be used. A current design plan for the mission is shown assuming 6 GRB detectors and estimates for structures are reviewed.

Hopkins, Randy↗