The design and control of a four-legged robot for operation on vertical sur
faces is described. The requirement that the robot trajectory be continuall
y modifiable on-line in response to external sensor data is addressed with
the development of a temporal gait control strategy. The ensuing gait autom
atically converges to various classical gaits for straight-line, turning an
d spinning maneuvres, and naturally accommodates transitions between these.
Simulation results are presented to demonstrate the performance of this co
ntrol strategy. (C)2000 Elsevier Science B.V. All rights reserved.