Research groups

به نام خداوند جان و خرد

سخنی از قرآن کریم

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GA Code Development - Summary

Motivations:

 

 Manufacturing a full composite wing or the whole body of an aircraft requires an optimum tailoring of the composite laminate

 Since the searching space involved is a large,† non-convex, discrete, and fuzzy the GA approach suites the goal more than other optimization schemes

 GA needs to be adapted to the composite tailoring area

 

Objectives:

 

Developing the GA code and studying the main terms in GA for adapting to composites like:

 

†††† ††† ††††† Penalty functions†††††††† †††††††††††† †††††††††††† Population size†††††††††††† †††††††††††† †††††††††††

†††† ††† ††††† Initial population††††††††† †††††††††††† †††††††††††† GA operators

†††† ††† ††††† Fitness Scaling†††††††††††† †††††††††††† †††††††††††† Stopping criteria

 

 

Results:

 

 A two part penalty (combination of Death-Dynamic penalties) was developed

 The best values of GA operators like mutation, cross over, elitism, etc. were defined and applied to the GA code.

 A new logarithmic stopping criteria was developed and applied

 A smart way of defining the initial population was invented

 The effect of population size was also studied.

 

Publications:

 

1) Abedian, A., Ghiasi, M.H., Dehghan-Manshadi, B., "An introduction to a new criterion proposed for stopping GA optimization process of a laminated composite plate", Journal of Aerospace Science and Technology (JAST), Vol. 3, No. 4, pp. 167-176, 2006.

2) Abedian, A., Ghiasi, M.H., Dehghan-Manshadi, B., "Effects of a linear-exponential penalty function on the GA's Efficiency in Optimization of laminated composite panel", International Journal of Computational Intelligence (IJCI), Vol. 2, No. 1, pp. 5-11, 2005.

3) Salehi, S. M., Abedian, A., "Effects of genetic Operators on the Optimum Tailoring of Laminated Composites Using GA", Proceeding of the 7th International Conference of the Iranian Aerospace Society, Tehran, Iran, 2008.

 

Jas39 Model

Motivations:

 As a test case for the GA code the model of Jas39 aircraft was chosen to be simulated and then manufactured

 

Objectives:

 Each major part of the aircraft is studied by one student:

†††† ††† †††††Nose (Amir)†††† †††††††††††† †††††††††††† †††††††††††† †††† ††††††† †††††Wing (Vahid)††††††††† †††††††††††

†††† ††† ††††† Fuselage (Mohamed)†† †††††††††††† †††††††††††† †††† ††††††† †††††Tail (Samaane)

†††† ††† †††††Canard (Zahra)†††††††††††† †††††††††††† †††††††††††† †††††††††††† ††††† Loading-Xplane (Mohamed)

 

 

 

Jas39

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Aerospace Engineering