This paper considers the vast development in the technology of sensor such as embedded system, Global Positioning System (GPS) wireless communications and wireless sensor applications. In recent years an ef icient design of a Wireless Sensor Network has become a leading area of research for semi-ballistic Unmanned Aerial Vehicle (UAV). A network of sensor is a device that responds and detects some type of input from both the physical or environmental conditions, such as pressure, heat, light, etc. The output of the sensor is generally an electrical conditions that is transmitted to controller for further processing. Wireless sensor network has been widely used and its design has become an important ield of control engineering in addition to providing real-time communication system in surveillance, tracking, and monitoring applications. In this paper, development of wireless sensor network for targeting and control system of a semi-ballistic UAV for rapid and precise search and rescue operations is being presented and discussed. The developed system is composed of two sections: Air Section and Ground Section. The Air Section consists of Magnetic Compass Sensor, Micro-Electro-Mechanical Sensors (MEMs), GPS, Camera, Servo Motor and Parachute Controllers and the latter is consist of Video Recording, Receiver and Monitoring. The system will helps in locating the exact location at centralized level. In effect, it increases the response ef iciency. Furthermore, this system helps in controlling and protecting naval, ground and arm forces in any location for the search and rescue operations. The wireless sensor network system is capable of collecting, storing and analyzing data from several devices embedded in the vehicle. Results show that the multi-sensor fusion and integration plays a critical role in the overall design and performance enhancement of the semi-ballistic unmanned aerial vehicle being developed.
To investigate the feasibility of a highly efficient flapping system capable of avian maneuvers, such as rapid takeoff, hover and gliding, a full scale bird-like (ornithopter) flapping-wing micro aerial vehicle (MAV) shaped and patterned after a typical pigeon (Columba livia) has been designed and constructed. Both numerical and experimental methods have been used in the development of this vehicle. This flapping-wing micro aerial vehicle utilizes both the flapping and feathering motions of an avian wing by employing a novel flapping-feathering mechanism, which has been synthesized and constructed so as to best describe the properly coordinated flapping and feathering wing motions at phase angle difference of 90 in a horizontal steady level flight condition. This design allows high flapping and feathering amplitudes and is configurable for asymmetric wing motions which are desirable in high-speed flapping flight and maneuvering. The preliminary results indicate its viability as a practical and an efficient flapping-wing micro aerial vehicle.
Abstract-In large water supply system where the source is elevated, the water reaches its destination with still a lot of energy to spare. This energy can be tapped by installing appropriate hydraulic turbine along the pipeline. A prototype gas/steam turbine-derivative axial flow impulse-type was designed and simulated using the Solid Works flow simulation software. It was then fabricated and tested. The experimental results indicated that at no load condition, the rotational speed ranges from 650 to 850 RPM depending on the water flow rate which ranges from 8.51 to 18.34 l/s. At 381 RPM, the torque was 3.05 N-m and the efficiency was 42%. The maximum efficiency occurred within the 300-350 RPM range. The flow at the exit was not much disturbed demonstrating that its installation did not hamper the supply line. It is recommended that further studies of prototypes designed on the same concept be done.Index Terms-Axial flow, gas/steam turbine-derivative, hydraulic turbine, impulse-type.
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