Objective sampling strategies for generalized locomotion behavior with lexicase selection

JM Moore, A Stanton - Artificial Life Conference Proceedings 33, 2021 - direct.mit.edu
Artificial Life Conference Proceedings 33, 2021direct.mit.edu
Controllers capable of exhibiting multiple behaviors is a longstanding goal in artificial life.
Evolutionary robotics approaches have demonstrated effective optimization of robotic
controllers, realizing single behaviors in a variety of domains. However, evolving multiple
behaviors in one controller remains an outstanding challenge. Many objective selection
algorithms are a potential solution as they are capable of optimizing across tens or hundreds
of objectives. In this study, we use Lexicase selection evolving animats capable of both wall …
Abstract
Controllers capable of exhibiting multiple behaviors is a longstanding goal in artificial life. Evolutionary robotics approaches have demonstrated effective optimization of robotic controllers, realizing single behaviors in a variety of domains. However, evolving multiple behaviors in one controller remains an outstanding challenge. Many objective selection algorithms are a potential solution as they are capable of optimizing across tens or hundreds of objectives. In this study, we use Lexicase selection evolving animats capable of both wall crossing and turn/seek behaviors. Our investigation focuses on the objective sampling strategy during selection to balance performance across the two primary tasks. Results show that the sampling strategy does not significantly alter performance, but the number of evaluations required varies significantly across strategies.
MIT Press
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