On the dynamic stability of a flying vehicle under the follower and transversal forces
Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering
مقاله 6، دوره 10، شماره 2، مرداد 2017، صفحه 61-76
نوع مقاله: English
نویسندگان
Omid Kavianipour* 1؛ Majid Sohrabian2
1Young Researchers and Elite Club, Damavand Branch, Islamic Azad University, Damavand, Iran
2Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
چکیده
This paper deals with the problem of the instability regions of a free-free uniform Bernoulli beam consisting of two concentrated masses at the two free ends under the follower and transversal forces as a model for a space structure. The follower force is the model for the propulsion force and the transversal force is the controller force. The main aim of this study is to analyze the effects of the concentrated masses on the beam instability. It is determined that the transverse and rotary inertia of the concentrated masses cause a change in the critical follower force. This paper also offers an approximation method as a design tool to find the optimal masses at the two tips using an artificial neural network (ANN) and genetic algorithm (GA). The results show that an increase in the follower and transversal forces leads to an increase of the vibrational motion of the beam which is not desirable for any control system and hence it must be removed by proper approaches.
کلیدواژه‌ها
Beam instability؛ Follower force؛ Vibration analysis؛ Artificial Neural Network (ANN)؛ Genetic Algorithm (GA)
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