Research groups

به نام خداوند جان و خرد

سخنی از قرآن کریم







































GA Code Development - Summary



 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




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





 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.




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


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



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

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

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

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


































































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Aerospace Engineering