Optimizing spacecraft risk management using heuristic search
We have had success using heuristic search techniques able to explore a large space of design options to locate optimal designs within that space.
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Engineering topics
Dunphy, J.
Publications and source records attributed to Dunphy, J..
A quantitative risk model for early lifecycle decision making
Decisions made in the earliest phases of system development have the most leverage to influence the success of the entire development effort, and yet must be made when information is incomplete and uncertain. We have developed a scalable cost-benefit model to support this critical phase of early-lifecycle decision-making.
requirements optimization summarization tradeoffs↗
A risk-centric model for value maximization
We describe an approach that makes value maximization possible during the earliest phases of software development.
requirements optimization summarization tradeoffs↗
Cost-benefit based assurance planning
We have extended an existing risk management framework with a refined cost-benefit model. Benefits are measured in terms of reduction of risk.
risk requirements tradeoffs design quality assuran↗
Discrete event simulation of NASA's Remote Exploration and Experimentation Project (REE)
The Remote Exploration and Experimentation Project (REE) is a new initiative at JPL to be able to place a supercomputer on board a spacecraft and allow large amounts of data reduction and compression to be done before science results are returned to Earth.
simulation REE↗
A Flexible Statechart-to-model-checker Translator
Many current-day software design tools offer some variant of statechart notation for system specification. We, like others, have built an automatic translator from (a subset of) statecharts to a model checker, for use to validate behavioral requirements.
statecharts↗
A Web Based Collaborative Design Environment for Spacecraft
In this era of shrinking federal budgets in the USA we need to dramatically improve our efficiency in the spacecraft engineering design process. We have come up with a method which captures much of the experts's expertise in a dataflow design graph.
collaborative↗
Web-Based Operation of Interactive Sharable Environment for Collaborative Spacecraft Design
A web-based interface has recently been added to an advanced integrated environment being developed at JPL that links collaborators who wish to perform interactive design analyses and/or mission simulations.
collaborative↗
Validation and Verification of the Remote Agent For Spacecraft Autonomy
The six-day Remote Agent Experiment (RAX) on the Deep Space 1 mission will be the first time that an artificially intelligent agent will control a NASA spacecraft.
autonomy↗
Position Paper for WIFT98
Explore the source record for details and available documents.
Position Paper WIFT 1998 High Assurance fault prot↗
Interactive Sharable Environment for Collaborative Spacecraft Design
An advanced integrated environment is being developed at JPL that links collaborators who wish to perform interactive design analyses and/or mission simulations.
3D↗
Integrated Design Systems -Capturing, Reusing and Optimizing Design Methods in New Millenium
An important goal of New Millenium is to research new methods of performing spacecraft and mission design. We have completed the first phase of our effort on how to make design tools such as analysis programs more available. We are now embarking with Stanford University on discovering methods to allow more project history and knowledge to be automatically captured and reused with Ames Research Center on how to use virtual reality to enhance the visualization of new missions before any hardware exists.
New↗