In this chapter, we introduce modeling and control for wheeled mobile robots and tracked vehicles. The target environment is rough terrains, which includes both deformable soil and heaps of rubble. Therefore, the topics are roughly divided into two categories, wheeled robots on deformable soil and tracked vehicles on heaps of rubble.
After providing an overview of this area in Sect. 50.1, a modeling method of wheeled robots on a deformable terrain is introduced in Sect. 50.2. It is based on terramechanics, which is the study focusing on the mechanical properties of natural rough terrain and its response to off-road vehicle, specifically the interaction between wheel/track and soil. In Sect. 50.3, the control of wheeled robots is introduced. A wheeled robot often experiences wheel slippage as well as its sideslip while traversing rough terrain. Therefore, the basic approach in this section is to compensate the slip via steering and driving maneuvers. In the case of navigation on heaps of rubble, tracked vehicles have much advantage. To improve traversability in such challenging environments, some tracked vehicles are equipped with subtracks, and one kinematical modeling method of tracked vehicle on rough terrain is introduced in Sect. 50.4. In addition, stability analysis of such vehicles is introduced in Sect. 50.5. Based on such kinematical model and stability analysis, a sensor-based control of tracked vehicle on rough terrain is introduced in Sect. 50.6. Sect. 50.7 summarizes this chapter.
Interactive, human-robot supervision test with the long-range science rover for Mars exploration
Author Samad Hayati, Richard Volpe, Paul Backes, J. (Bob) Balaram, Richard Welch, Robert Ivlev, Gregory Tharp, Steve Peters, Tim Ohm, Richard Petras
Video ID : 187
This video records a demonstration of the long-range rover mission on the surface of Mars. The Mars rover, the test bed Rocky 7, performs several demonstrations including 3-D terrain mapping using the panoramic camera, telescience over the internet, an autonomous mobility test, and soil sampling.
This demonstration was among the preliminary tests for the Mars Pathfinder mission executed in 1997.