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Multi-objective optimisation of pulsed Nd:YAG laser cutting process using integrated ANN–NSGAII model

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Abstract

The paper presents an integrated model of artificial neural networks (ANNs) and non-dominated sorting genetic algorithm (NSGAII) for prediction and optimization of quality characteristics during pulsed Nd:YAG laser cutting of aluminium alloy. A full factorial experiment has been conducted where cutting speed, pulse energy and pulse width are considered as controllable input parameters with surface roughness and material removal rate as output to generate the dataset for the model. In ANN–NSGAII model, back propagation ANN trained with Bayesian regularization algorithm is used for prediction and computation of fitness value during NSGAII optimization. NSGAII generates complete set of optimal solution with pareto-optimal front for outputs. Prediction accuracy of ANN module is indicated by around 1.5 % low mean absolute % error. Experimental validation of optimized output results less than 1 % error only. Characterization of the process parameters in pareto-optimal region has been explained in detail. Significance of controllable parameters of laser on outputs is also discussed.

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Acknowledgments

The authors are thankful to all scientists and staff members of Centre for Laser Processing of Materials (CLPM), ARCI, Hyderabad, India, for kindly extending the facilities for conducting experiments on laser cutting and for providing useful advice and suggestions. Authors are also thankful to the Prof. Gautam Majumdar, Department of Mechanical Engineering, Jadavpur University for providing the facilities for post experimental measurements.

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Correspondence to Sudipto Chaki.

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Chaki, S., Bathe, R.N., Ghosal, S. et al. Multi-objective optimisation of pulsed Nd:YAG laser cutting process using integrated ANN–NSGAII model. J Intell Manuf 29, 175–190 (2018). https://doi.org/10.1007/s10845-015-1100-2

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  • DOI: https://doi.org/10.1007/s10845-015-1100-2

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