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Group 11 Kaleb Bastart Lauren Gutierrez Mike Popoloski P. Brian Tagalog

Group 11 Kaleb Bastart Lauren Gutierrez Mike Popoloski P. Brian Tagalog Adviser: Professor Bruce McNair. Outline. Who We Are Our Idea Objectives and Goals System Overview Requirements Velocity Measurement Explanation of Equations. Overview of Components Design Alternatives

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Group 11 Kaleb Bastart Lauren Gutierrez Mike Popoloski P. Brian Tagalog

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  1. Group 11Kaleb Bastart Lauren GutierrezMike Popoloski P. Brian Tagalog Adviser: Professor Bruce McNair SIT UAV December 2011

  2. Outline • Who We Are • Our Idea • Objectives and Goals • System Overview • Requirements • Velocity Measurement • Explanation of Equations • Overview of Components • Design Alternatives • Weight Considerations • Requirements • Parts List • Financial Budget • Schedule SIT UAV December 2011

  3. Who We Are • Kaleb Bastart • Major: Computer Engineering • Lauren Gutierrez • Major: Electrical Engineering • Mike Popoloski • Major: Computer Engineering • P. Brian Tagalog • Major: Electrical Engineering SIT UAV December 2011

  4. Objectives and Goals • Build an Unmanned Aerial Vehicle (UAV) to find survivors of disasters. • Use a dirigible for stability and longevity. • Allow the UAV to be controlled by an operator or follow a predetermined flight plan. • Transmit imagery of the scene to assist in spotting trapped victims. SIT UAV December 2011

  5. System Overview Dirigible Ground Station

  6. System Overview

  7. Design Requirements • Dirigible was chosen over other designs: • Less power to stay aloft • Stable motion for camera • Needs to cruise at an altitude of 20 ft at a speed of 2 ft/s. • Should stay aloft for at least 10 minutes. • Will allow manual control or autonomous movement via waypoints.

  8. Design Requirements • Platform will transmit heading, height, and video to ground station. • Ground station will perform image processing to determine range and velocity. • Ground station will send control commands to direct motion of the platform. • Operator will use GUI software to control all aspects of flight.

  9. Velocity Measurement • Using a laser and camera, software can find distance. Source: http://sites.google.com/site/todddanko/home/webcam_laser_ranger

  10. Velocity Measurement • Once distance is known, velocity can be found from change in pixel positions between time steps.

  11. Equations Needed to answer questions such as: • What’s the minimum Lift Force • How much helium? • How big this dirigible will be? • What’s the maximum velocity? • Which motors to buy? • What’s the maximum velocity it will go?

  12. Equations Independent Variables Lift Thrust Drag Weight

  13. Equations Going Up Minimum Lift Force = Weight

  14. Equations How much Helium? • How big this dirigible will be? http://www.calculateme.com/cVolume/VolumeOfSphere.htm

  15. Equations Going Forward Thrust Drag We obtain Maximum Velocity Thrust Force = Drag Force

  16. Equations Going Forward Drag Force: Surface Area facing the stream of Air:

  17. Equations Going Forward Thrust for Force: Sometimes given In grams force

  18. Equations Going Forward What's our maximum velocity? Solving for velocity:

  19. UAV Component Considerations • Weight • Price • Accuracy • Functionality

  20. UAV Component: Blimp • Filled with helium (to be provided by school) • Mylar

  21. UAV Component: Motors and Propellers • Thrust: 31, 36, 38g • Voltage: 3.3, 3.8, 4V • Weight: 3.3g

  22. UAV Component: Camera • CMOS • Transmission Range: 450 ft • Very lightweight

  23. UAV Component: Laser Pointer Module • Measure distance • Requires no interaction with the rest of the system.

  24. UAV Component: Arduino • Microprocessor • Arduino Nano v3.0 • 14 I/O pins • 16 MHz • 16 KB Flash memory

  25. UAV Component: Gyroscope • Measure acceleration: • 3-Axis angular rate sensor (yaw, pitch, and roll) • Three selectable scales: 250/500/2000 degrees/sec (dps)

  26. UAV Component: Barometric Pressure Sensor • Measure height via pressure • Digital two wire (I2C) interface • 300 to 1100 hPa range

  27. UAV Component: Transceiver and Adapter • Communicate sensor readings to and from base station • Transmission Range: 300 ft

  28. UAV Component: Breadboard • Platform for control circuit • Can be replaced with a soldered circuit board later

  29. Alternative Design Considerations • Alternatives to dirigible: • Airplane and helicopter – both too complex / unstable • Alternatives for motors: • More powerful but heavier motors, more expensive • Alternative ways to measure velocity: • Accelerometers • Pitot Tube • GPS

  30. Total UAV Weight

  31. Parts & Budget SIT UAV December 2011

  32. Project Schedule • Regular meetings • Group meetings • Meetings with advisor • Weekly goals • Complete weekly tasks by Friday • Plans made up through end of spring semester • Group is on track to hit target for senior design day SIT UAV December 2011

  33. Summary • Search and Rescue UAV • Built using a dirigible • Transmits video imagery • Allows autonomous movement via waypoints • Final design plan is done and ready to be built SIT UAV December 2011

  34. Any Questions? SIT UAV December 2011

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