Three-dimensional shape optimization utilizing a learning classifier system

  • Authors:
  • Robert A. Richards;Sheri D. Sheppard

  • Affiliations:
  • Stanford University, Stanford, CA;Stanford University, Stanford, CA

  • Venue:
  • GECCO '96 Proceedings of the 1st annual conference on Genetic and evolutionary computation
  • Year:
  • 1996

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Abstract

A methodology to perform generalized zeroth-order two- and three-dimensional shape optimization utilizing a learning classifier system is presented and applied. Specifically, the methodology has the objective of determining the optimal boundary to minimize mass while satisfying constraints on stress and geometry. Even with the enormous advances in shape optimization no method has proven to be satisfactory across the broad spectrum of optimization problems facing the modern engineer. The shape optimization via hypothesizing inductive classifier system complex (SPHINcsX) instantiates the methodology in a software package overcoming many of the limitations of today's conventional shape optimization techniques. From environmental input, and a population of initially randomly generated rules, SPHINcsX is expected to learn to make the appropriate component shape modifications to reach a minimum mass design while satisfying all stress constraints. SPHINcsX not only learns from a clean slate, but confronts the additional challenge of learning without sensitivity information that most other shape optimization algorithms deem essential. SPHINcsX has proven adept at solving both two- and three-dimensional shape optimization problems.