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Novel Metaheuristic Hybrid Spiral-Dynamic Bacteria-Chemotaxis Algorithms for Global Optimisation

Ahmad Nor Kasruddin, Nasir and Tokhi, M. O. (2015) Novel Metaheuristic Hybrid Spiral-Dynamic Bacteria-Chemotaxis Algorithms for Global Optimisation. Applied Soft Computing, 27. pp. 357-375. ISSN 1568-4946 (print); 1872-9681 (online)

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This paper presents hybrid spiral-dynamic bacteria-chemotaxis algorithms for global optimisation and their application to control of a flexible manipulator system. Spiral dynamic algorithm (SDA) has faster convergence speed and good exploitation strategy. However, the incorporation of constant radius and angular displacement in its spiral model causes the exploration strategy to be less effective hence result- ing in low accurate solution. Bacteria chemotaxis on the other hand, is the most prominent strategy in bacterial foraging algorithm. However, the incorporation of a constant step-size for the bacteria move- ment affects the algorithm performance. Defining a large step-size results in faster convergence speed but produces low accuracy while defining a small step-size gives high accuracy but produces slower con- vergence speed. The hybrid algorithms proposed in this paper synergise SDA and bacteria chemotaxis and thus introduce more effective exploration strategy leading to higher accuracy, faster convergence speed and low computation time. The proposed algorithms are tested with several benchmark functions and statistically analysed via nonparametric Friedman and Wilcoxon signed rank tests as well as para- metric t-test in comparison to their predecessor algorithms. Moreover, they are used to optimise hybrid Proportional-Derivative-like fuzzy-logic controller for position tracking of a flexible manipulator system. The results show that the proposed algorithms significantly improve both convergence speed as well as fitness accuracy and result in better system response in controlling the flexible manipulator.

Item Type: Article
Uncontrolled Keywords: Spiral dynamics Bacteria chemotaxis PD-like control Fuzzy logic control Flexible manipulator system
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Electrical & Electronic Engineering
Depositing User: Mr. Ahmad Nor Kasruddin Nasir
Date Deposited: 17 Dec 2014 02:22
Last Modified: 21 Aug 2018 03:37
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