Terrain identification methods for planetary exploration rovers
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/30303 |
| _version_ | 1826189099259658240 |
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| author | Brooks, Christopher Allen, 1978- |
| author2 | Steven Dubowsky. |
| author_facet | Steven Dubowsky. Brooks, Christopher Allen, 1978- |
| author_sort | Brooks, Christopher Allen, 1978- |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004. |
| first_indexed | 2024-09-23T08:09:30Z |
| format | Thesis |
| id | mit-1721.1/30303 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T08:09:30Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/303032019-04-09T17:01:56Z Terrain identification methods for planetary exploration rovers Brooks, Christopher Allen, 1978- Steven Dubowsky. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Mechanical Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004. Includes bibliographical references (leaves 77-82). Autonomous mobility in rough terrain is becoming increasingly important for planetary exploration rovers. Increased knowledge of local terrain properties is critical to ensure a rover's safety, especially when driving on slopes or rough surfaces. This thesis presents two methods for using on-board sensors to identify local terrain conditions. The first method visually measures sinkage of a rover wheel into deformable terrain, based on a single color or grayscale image from a camera with a view of the wheel- terrain interface. Grayscale intensity is computed along the rim of the wheel, and the wheel-terrain interface is identified as the location with maximum change in intensity. The algorithm has been shown experimentally to give accurate results in identifying the terrain characteristics under a wide range of conditions. The second method classifies terrain based on vibrations induced in the rover structure by rover-terrain interaction during driving. Vibrations are measured using an accelerometer on the rover structure. The method uses a supervised learning approach to train a classifier to recognize terrain based on representative vibration signals during an off-line learning phase. Real-time terrain classification uses linear discriminant analysis in the frequency domain to identify gross terrain classes such as sand, gravel, or clay. The algorithm is experimentally validated on a laboratory testbed and on a rover in outdoor conditions. Results demonstrate the robustness of the algorithm on both systems. by Christopher Allen Brooks. S.M. 2006-03-24T18:38:27Z 2006-03-24T18:38:27Z 2004 2004 Thesis http://hdl.handle.net/1721.1/30303 61049800 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 129 leaves 6533853 bytes 6550334 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Brooks, Christopher Allen, 1978- Terrain identification methods for planetary exploration rovers |
| title | Terrain identification methods for planetary exploration rovers |
| title_full | Terrain identification methods for planetary exploration rovers |
| title_fullStr | Terrain identification methods for planetary exploration rovers |
| title_full_unstemmed | Terrain identification methods for planetary exploration rovers |
| title_short | Terrain identification methods for planetary exploration rovers |
| title_sort | terrain identification methods for planetary exploration rovers |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/30303 |
| work_keys_str_mv | AT brookschristopherallen1978 terrainidentificationmethodsforplanetaryexplorationrovers |