Rossum -> Papers and RFC's -> Localization and Exploration


Multiple map update
During this test the map was continuously updated. The first sweep was performed at position 1 (cell 125, 125) and the global map was updated. When a range sensor sweep is received a localization is performed and then the map is updated at the calculated position. The following map settings were used: That gives us a 5m x 5m map. The following figures show the results I've got when moving the robot through the five locations shown in the room map.


Map position : 2
Orientation : 66 degrees
Range sensor sweep : 360 degrees
Map updated : yes
Calculated location : 139, 119 (30.5cm from Pos 1)
Location error : ~1cm (0 cells)


Map position : 3
Orientation : 60 degrees
Range sensor sweep : 180 degrees
Map updated : yes
Calculated location : 112, 133 (30.5cm from Pos 1)
Location error : ~1cm (0 cells)


Map position : 4
Orientation : 320 degrees
Range sensor sweep : 180 degrees
Map updated : yes
Calculated location : 143, 154 (68.3cm from Pos 1)
Location error : ~8.3cm (4 cells)


Map position : 5
Orientation : 74 degrees
Range sensor sweep : 180 degrees
Map updated : yes
Calculated location : 121, 98 (54.6cm from Pos 1)
Location error : ~5.4cm (3 cells)







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Copyright Vassilis Varveropoulos
Last updated 20/11/00