UNMANNED AERIAL VEHICLES

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PPT on UAVs which increasing in numbers in us,russia and other countries

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UNMANNED AERIAL VEHICLES:

UNMANNED AERIAL VEHICLES DRONE TECHNOLOGY

WHAT IS UAV ?:

WHAT IS UAV ? An unmanned aerial vehicle (UAV), known as a drone, is an aircraft without a human pilot. Drone stands for Dynamic Remotely Operated Navigation Equipment Its flight is either controlled autonomously by computers or under the remote control of a pilot on the ground .

Slide 3:

AERODYNAMICS BASICS

CONSTRUCTION:

CONSTRUCTION RQ-1/ A Predator A Rotax 914, four-cylinder, four-stroke, 101-horsepower engine. Rear-mounted propeller F uselage ,which is a mixture of carbon and quartz Rib work is built from a carbon/glass fiber tape and aluminum. Sensor housing and wheels are aluminum. Edges of the wings are titanium and are dotted with microscopic weeping holes

USED ROTARY ENGINE:

USED ROTARY ENGINE Governing equation N=position of rotor tips Provides ease of balancing,reduced vibration &continuous unidirectional motion

Slide 6:

ENGINE WORKING

SPECIFICATIONS:

SPECIFICATIONS Light and Efficient Cruises at 84miles/hr(135km/hr) Engine burns 300times lesser fuel than fighter jets Weights upto 2000 pounds(680 kg) Fly upto almost 25000 fts . Endurance of 24 hrs .

Most Sophisticated Components ::

Most Sophisticated Components : Full-color nose camera that the pilot uses primarily to navigate the craft Variable aperture camera (similar to a traditional TV camera ) that functions as the Predator's main set of "eyes" Variable aperture infrared camera for low-light and night viewing Synthetic aperture radar (SAR) for seeing through haze , clouds or smoke INS/GPS Integrated Navigation System A ku band satellite communication system Electro-optical infrared system,laser designator, and laser illuminator .

WORKING:

WORKING Target points are decided first Now the guidance algorithm calculates the desired flight parameters i.e. Bearing, altitude, airspeed etc. Navigation system provides the altitude parameters of the aircraft using different sensors (gps, accelerometer, gyroscope, magnetometer, pitot-tube, barometer etc.). Difference between desired flight parameters and input navigation data are fed to the digital autopilot for the corrective action. Output of the digital autopilot is fed to the control surfaces (aileron, elevator and rudder) to make the correction in their actual flight parameter

PROBLEMS FACED:

PROBLEMS FACED Clear imaging at high altitudes. Navigation over horizon(earth’s curvature). Target hitting Precision. Loss of control or hacking Image blips during clouds by radar imaging

SOLUTIONS GENERATED:

SOLUTIONS GENERATED Camera with 1.8 billion pixels was developed works on warpes (wide area persistence steer) sensor Consists of 368 chips. Opens upto 65 live videos at a time

NAVIGATION OVER HORIZONS :

NAVIGATION OVER HORIZONS Indirect Datalink Exchange with a SATCOM radar systems

TARGET HITTING PRECISION:

TARGET HITTING PRECISION Infrared laser beam is fired from the MTS balls. The laser beam then reflects after positioning the target. The pulse then received by the seeker mounted on missile and destroys the target.

LOSS OF CONTROL:

LOSS OF CONTROL Besides, a laser range finder and depth camera relieves it from GPS . It determines distance to obstacles and reveals a 3-D images of the environment . And now it doesn’t needs datalink.

IMAGE BLIPPING:

IMAGE BLIPPING A synthetic aperture radar(SAR) is installed. This new sensor can see through clouds Forms a real world image as compared to normal radars.

DIFFERENT UAVs:

DIFFERENT UAVs X47B ,Totally automated first tailless and invisible aircraft. Global hawk ,Biggest uav till now,Cruises at 65000 fts.,totally autonomous . The Helios wing operated by solarpower, Endurance -1 month

On Going Researches:

On Going Researches Prototype of micro uav Understandind the flight of the fly for micro UAV

ADVANTAGES AND DISADVANTAGES:

ADVANTAGES AND DISADVANTAGES Does not contain, or need, a qualified pilot on board Reduces the exposure risk of the aircraft operator Performing visual or thermal imaging of a region Measuring cell phone, radio, or, TV coverage over any terrain Can be programmed to complete the mission autonomously even when contact with its GCS is lost Immoral Civilian casualties Can be hacked or given viruses Too small for transportation of materials Low resistance to weather Cannot refuel in flight If contact is lost with the ground station, the vehicle may be lost.

CONCLUSION:

CONCLUSION Unmanned Aerial Vehicles are an exciting field in the world of aviation, with new discoveries. Over the next 16 years, UAVs will become a significant component of military, civil, and perhaps even commercial aviation. However, the very dynamic nature of the field also creates a significant amount of uncertainty. The wide range of UAV physical and performance characteristics, many of which will be very unlike any current aircraft, will place additional challenges on an air traffic management system.

REFERENCES:

REFERENCES [ Gebre-Egziabher , 2001] Gebre-Egziabher, D. (December 2001). Design and Performance Analysis of Low-Cost Aided Dead Reckoning Navigator. PhD thesis, Department of Aeronautics and Astronautics, Stanford University, Stanford, CA. http ://youtube.com/basicaerodynamics/ http://zeenews.india.com/state/news/index785.html http://timesofindia.indiatimes.com/topic/unmanned-aerial-vehicle http://www.thehindu.com/news/national/

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