Transcript In-class Design Presentation - ECpE Senior Design

Lockheed Martin Challenge
Problem Statement
– Problem Statement
Current UAV technology is not capable of launching vertically
using a rail launch system into the atmosphere. As such,
current UAV’s are not suitable for use for urban operations as
they must be launched away from the urban setting due to
obstacles. This presents problems for certain missions that
could be assisted by UAV technology.
Operating Environment and Use
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Urban environment
Heat
Controlled by soldier with limited experience
Fly autonomous and transmit video
System Block Diagram
Video Transmission System
Last Year’s System:
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Transmitted on 2.4 GHz at 1 watt
Could not reach the full 1 mile
Highly prone to interference
Did not meet FCC regulations for ATV
Video Transmission System
New System
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Choice of Frequency (440 Mhz):
Choice of Transmitter (2 watt)
Choice of Antenna
Meeting FCC Regulations
FCC allows transmit power of up to 50 watts on 440 MHz
Video Transmission System
UAV
Video Camera
Transmitter
OSD Board
TX Antenna
Ground Station
RX Antenna
Down-Converter
IF Converter
Video Screen
Video Transmission System
Plans for Testing:
1. Test with just video transmitter and computer TV capture
card
2. Test with just video transmitter and down-converter
3. Test with down-converter and IF converter
4. Full system test:
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Range tests (transmitter and receiver placed at different distances)
Interference tests (transmitter and receiver placed across buildings)
Tests performed with various antenna design iterations
Power System
Last Year’s System:
The DC‐DC converter is fed by the avionics battery and supplies appropriate
voltages to on‐board avionics equipment (5V and 12V).
• 1400 mAh NiCad Battery
• Weight=156g+183g+30g=369g
• Approx run time=30 Minutes
Power System
New System Design:
Two switching regulators are used to supply both 11V and 5V to the desired
systems.
LMC SYSTEM LOAD TEST
Voltage
Last 10 minutes ( after 134 minutes of constant output
voltages)
20
battery
10
5V
0
0
200
400
600
11v
Time(s)
• 2350 mAh 14.8V Lipoly Battery
• Weight=262g+32g=294g
• Approx run time=2.15 Hours
Autopilot
Autopilot
Autopilot
Resources and Schedule
Resources and Schedule
Questions
REPORT DISCLAIMER NOTICE
DISCLAIMER: This document was developed as a part of the requirements of a multidisciplinary engineering course at Iowa State University, Ames, Iowa. This document
does not constitute a professional engineering design or a professional land surveying document. Although the information is intended to be accurate, the associated
students, faculty, and Iowa State University make no claims, promises, or guarantees about the accuracy, completeness, quality, or adequacy of the information. The
user of this document shall ensure that any such use does not violate any laws with regard to professional licensing and certification requirements. This use includes
any work resulting from this student-prepared document that is required to be under the responsible charge of a licensed engineer or surveyor. This document is
copyrighted by the students who produced this document and the associated faculty advisors. No part may be reproduced without the written permission of the course
coordinator.
Images within this presentation were obtained via the courtesy of their respective owners, listed below:
Lockheed Martin Corporation
MicroPilot