Numerical and experimental analysis of a piezoelectric flat plate in flapping motion

Download
2014
Harputlu, Özgür
The technology of unmanned aerial vehicles (UAV) has a rapid improvement and their use is increasing day by day for military and civilian missions. Developments in production technology enable the fabrication of micro aerial vehicles. Flapping wing systems have an important place among UAVs. These vehicles are superior to fixed wing aircrafts with their high maneuverability and hover capabilities and they can successfully perform many missions in which the fixed aircrafts are insufficient. Developments in material technology provided the use of smart materials and their integration to the engineering applications. Piezoelectric materials which possess the property of electromechanical coupling can be classified as smart materials and they are widely used in aerial vehicle applications. As an example to this fact, piezoelectric actuators which are exceptional choices to drive flapping wing micro air vehicles may be highlighted. The experiments are performed for different operating signal types and frequencies. The displacement fields obtained from the experimental analysis are used as inputs to the numerical analysis. The numerical simulation is performed using the structural analysis and aerodynamic flow analysis components of ANSYS software. The elastic deformations are inserted into the structural system and linked to the fluid flow system. Flow domain around the beam in flapping is then simulated. An analytical model is established to obtain elastic curve of the bimorph piezoelectric beam under actuation loading. The objective of this study is to analyze piezoelectric flat plate in flapping motion by experimental and numerical methods.

Suggestions

Mission planning for unmanned aerial vehicle (UAV) teams
Yılgın, Serdar; Polat, Faruk; Department of Computer Engineering (2014)
In recent years, use of Unmanned Aerial Vehicle (UAV) especially for reconnaissance and combat missions has become very popular in worldwide. There is no onboard human operator exists for UAVs and they are generally controlled by remote human operators. Depending on the operational environment; sometimes it becomes nearly impossible to provide optimal or an acceptable UAV – target assignment and scheduling, satisfying the constraints required to accomplish the mission, for the operators in control center. I...
Task assignment and scheduling in UAV mission planning with multiple constraints
Semiz, Fatih; Polat, Faruk; Department of Computer Engineering (2015)
In the recent years, unmanned aerial vehicles (UAVs) have started to be utilized as the first choice for high risk and long duration tasks, because UAVs are cheaper; they are hard to be noticed and they can perform long duration missions. Furthermore, the utilization of UAVs ensures to reduce the risk to the human life. Examples of this kind of missions includes signal collection, surveillance and reconnaissance and combat support missions. It is valuable to develop a fully autonomous UAV fleet to perform t...
End-to-end networks for detection and tracking of micro unmanned aerial vehicles
Aker, Cemal; Kalkan, Sinan; Department of Computer Engineering (2018)
As the number of micro unmanned aerial vehicles (mUAV) increases, several threats arise. Hence, there is a need for a system that can detect and track them. In this thesis, an object detection model based on convolutional neural networks for mUAV detection, and a novel end-to-end object tracking architecture are proposed. To solve the scarce data problem for training the detection network, an algorithm for creating an extensive artificial dataset by combining background-subtracted real images is proposed. I...
Numerical analysis of 3D model flapping flat plate
Dizman, Begüm; Kurtuluş, Dilek Funda; Department of Aerospace Engineering (2016)
Flapping Micro Air Vehicles (MAV) studies gain an importance recently and in the future they will be used in civil and military applications in a widespread manner. Wing mechanism of MAV’s is similar to birds’ and insects’ wing motion and is highly maneuverable. This flapping motion provides them fly in low Reynolds Number. In order to understand successful flight of MAVs , time dependent aerodynamic performance must be investigated in detail. This study includes investigation of 3D sweeping of flat plate n...
Detection of mini/micro unmanned air vehicle (UAV) under clutter presence and environmental effects
Dere, İsmail Gökhan; Kuzuoğlu, Mustafa; Department of Electrical and Electronics Engineering (2019)
Detection, tracking and classification of Unmanned Air Vehicles (UAVs) is an emerging and crucial capability of radars in recent years. In the presence of clutter such as a crowded city or a foggy weather above sea surface, mini and micro UAVs become very difficult for radars to detect, track and classify. Classification information of UAV targets can be very useful for the critical infrastructures in order to provide security. Examined studies imply that kinematic and characteristic features such as Dopple...
Citation Formats
Ö. Harputlu, “Numerical and experimental analysis of a piezoelectric flat plate in flapping motion,” M.S. - Master of Science, Middle East Technical University, 2014.