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Complex Behavior in Evolutionary Robotics
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Complex Behavior in Evolutionary Robotics
by Lukas König
Complex Behavior in Evolutionary Robotics
Also of interest
Title Page
Copyright Page
Acknowledgements
Dedication
Table of Contents
Table of Figures
List of Tables
List of Notations
1 Introduction
1.1 Evolutionary Robotics and Evolutionary Swarm Robotics
1.2 Further Classifications
1.3 Challenges of ER
1.4 Structure and Major Contributions of the Thesis
2 Robotics, Evolution and Simulation
2.1 Evolutionary Training of Robot Controllers
2.1.1 Two Views on Selection in ER and ESR
2.1.2 Classification of Fitness Functions in ER
2.1.3 The Bootstrap Problem
2.1.4 The Reality Gap
2.1.5 Decentralized Online Evolution in ESR
2.1.6 Evolvability, Controller Representation and the Genotype-Phenotype Mapping
2.1.7 Controller Representation
2.1.8 Recombination Operators
2.1.9 Success Prediction in ESR
2.2 Agent-based Simulation
3 The Easy Agent Simulation
3.1 History of the Easy Agent Simulation Framework
3.2 Basic Idea and Architectural Concept
3.2.1 Overview
3.2.2 Preliminaries
3.2.3 Classification of the Architecture
3.2.4 The SPI Architecture from an MVC Perspective
3.2.5 Comparison of the SPI Architecture with State-of-the-Art ABS Frameworks
3.3 Implementation of the SPI within the EAS Framework
3.3.1 Overview
3.3.2 Plugins
3.3.3 Master Schedulers
3.3.4 The classes SimulationTime and Wink
3.3.5 The Interface EASRunnable
3.3.6 “Everything is an Agent”: a Philosophical Decision
3.3.7 Running a Simulation
3.3.8 Getting Started
3.4 A Comparative Study and Evaluation of the EAS Framework
3.4.1 Method of Experimentation
3.4.2 Results and Discussion
3.5 Chapter Resume
4 Evolution Using Finite State Machines
4.1 Theoretical Foundations
4.1.1 Preliminaries
4.1.2 Definition of the MARB Controller Model
4.1.3 Encoding MARBs
4.1.4 Mutation and Hardening
4.1.5 Selection and Recombination
4.1.6 Fitness calculation
4.1.7 The Memory Genome: a Decentralized Elitist Strategy
4.1.8 Fitness Adjustment after Mutation, Recombination and Reactivation of the Memory Genome
4.1.9 The Robot Platforms
4.2 Preliminary Parameter Adjustment using the Example of Collision Avoidance
4.2.1 Specification of Evolutionary Parameters
4.2.2 Method of Experimentation
4.2.3 Evaluation and Discussion
4.2.4 Concluding Remarks
4.3 A Comprehensive Study Using the Examples of Collision Avoidance and Gate Passing
4.3.1 Method of Experimentation
4.3.2 Experimental results
4.3.3 Concluding remarks
4.4 Experiments With Real Robots
4.4.1 Evolutionary Model
4.4.2 Method of Experimentation
4.4.3 Results and Discussion
4.4.4 Concluding Remarks
4.5 Chapter Résumé
5 Evolution and the Genotype-Phenotype Mapping
5.1 Overview of the Presented Approach
5.2 A Completely Evolvable Genotype-Phenotype Mapping
5.2.1 Definition of (complete) evolvability
5.2.2 Properties of ceGPM-based genotypic encodings
5.2.3 The Translator Model MAPT and the Course of Evolution
5.2.4 Genotypic and Phenotypic Spaces
5.2.5 Evolutionary Operators
5.3 Evaluation of the Proposed Evolutionary Model
5.3.1 First Part – Method of Experimentation
5.3.2 First Part – Results and Discussion
5.3.3 Second Part – An Alternate Completely Evolvable Genotype-Phenotype Mapping and its Effects on Evolvability
5.3.4 Second Part – Method of Experimentation
5.3.5 Second Part – Results and Discussion
5.3.6 Third Part – Method of Experimentation
5.3.7 Third Part – Results and Discussion
5.4 Chapter Résumé
6 Data Driven Success Prediction of Evolution in Complex Environments
6.1 Preliminaries
6.2 A Model Capturing Completely Implicit Selection
6.2.1 Two Parents per Reproduction (CIS-2)
6.2.2 Eventually Stable States (k=2)
6.2.3 Tournament size k
6.2.4 Eventually Stable States (arbitrary k)
6.3 Extending the CIS Model to Capture Explicit Selection
6.4 Experiments
6.4.1 Evolutionary setup
6.4.2 Experimental Results Using the EIS Model
6.4.3 Remarks on Evolution in the scope of the CIS Model
6.5 Chapter Résumé
7 Conclusion
References
Index
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