Page 273 - Concise Encyclopedia of Robotics

30°
60°
90°
270° 300° 330° 0° Reactive Paradigm

240° 120°

210° 150°
180°
Range plotting

illustration would show ceiling fixtures, objects on the floor, objects on
top of the desks, and other details not visible with a 2-D range plot.
See also COMPUTER MAP, DEPTH MAP, DIRECTION RESOLUTION, DISTANCE RESOLUTION,
LADAR, RADAR, and SONAR.
RANGING
See DISTANCE MEASUREMENT.
REACTIVE PARADIGM
The reactive paradigm is an approach to robot programming in which all
actions are the direct results of sensor output. No advance planning is
involved. This approach arose because of limitations inherent in the hier-
archical paradigm, which relies on rigid adherence to a specific plan in
order to reach a goal. The reactive paradigm became popular around
1990, and its use was favored through the early 1990s.
In the most sophisticated robot systems, there are three basic functions,
known as plan/sense/act. The reactive paradigm simplifies this to sense/act.

