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A comparison of risk sensitive path planning methods for aircraft emergency landing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Smith, Tristan Meuleau Sr., Nicolas Plaunt, Christian Smith, David E. |
| Copyright Year | 2009 |
| Description | Determining the best site to land a damaged aircraft presents some interesting challenges for standard path planning techniques. There are multiple possible locations to consider, the space is 3-dimensional with dynamics, the criteria for a good path is determined by overall risk rather than distance or time, and optimization really matters, since an improved path corresponds to greater expected survival rate. We have investigated a number of different path planning methods for solving this problem, including cell decomposition, visibility graphs, probabilistic road maps (PRMs), and local search techniques. In their pure form, none of these techniques have proven to be entirely satisfactory - some are too slow or unpredictable, some produce highly non-optimal paths or do not find certain types of paths, and some do not cope well with the dynamic constraints when controllability is limited. In the end, we are converging towards a hybrid technique that involves seeding a roadmap with a layered visibility graph, using PRM to extend that roadmap, and using local search to further optimize the resulting paths. We describe the techniques we have investigated, report on our experiments with these techniques, and discuss when and why various techniques were unsatisfactory. |
| File Size | 280640 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100023394 |
| Archival Resource Key | ark:/13960/t4pk5cc0b |
| Language | English |
| Publisher Date | 2009-09-19 |
| Access Restriction | Open |
| Subject Keyword | Air Transportation And Safety Aircraft Safety Position Location Trajectory Planning Risk Controllability Visibility Emergency Landing Survival Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
