1. Nicole Bryan 1/31/2008 Avionics Sensor Selection and Link Budget Analysis
AAE 450 Spring 2008

2. Sensors
Sensor
Unit Price
Voltage
Thermal Sensors
~ $10
~ 5 V
Pressure Sensors
~ $100
Varies(.5V-100mV)
Flow Sensors
~ $215
~ 110 V (AC)
Force Sensors
$55, $112
100LbF, 1000LbF
-----
IMUs
~ $400
This is the start of developing a complete power budget for use in battery selection.
AAE 450 Spring 2008
Avionics

3. Link Budget Analysis
Frequency (MHz)
Path Length (km)
Power Input (W)
Vehicle Antenna Beamwidth (deg)
Vehicle Antenna Diameter (m)
Ground Antenna Diameter (m) 15
4500 5 30
46.67
15.5
137
5.11
400
1.75
1428
0.49 18
2025
4000 35
0.30
2300
0.26
Assumptions:
8.5 x 107 bps data rate
2 dB implementation loss factor
1400 MHz to 1530 MHz
Better signal range
Feasible vehicle antenna sizes
Low power requirements
Reference: Justin Rhodes, Nicole Bryan
Calculations method: Professor Filmer
AAE 450 Spring 2008
Avionics

4. Possible Radio Frequencies
Frequency Range (MHz)
Regulated Use
Notes
space research
amateur satellite
satellite ID and space research
space operation
Different International/US regulations
space operation, telemetry
space operation, mobile satellites
US regulations only
Reference: FCC -
AAE 450 Spring 2008
Avionics

5. Reference: Danielle Yaple
IMU
IMU
Weight
G Force
Size
Bandwidth
Q-Flex®
71 g
250 g
25.4 mm dia. X 24.6 mm high
>300Hz
Cross bows
<.59 kg
1000g
Non-operating
76.2 X x mm
>25 Hz Ang.
>75 Hz Accel.
Si-Sensing Systems
<18 g
<1000g
18 X 29 X 29 mm
10 Hz
Estimate Cost: $ Weight: 12 – 600g
Reference: Danielle Yaple
AAE 450 Spring 2008
Avionics

6. Reference: Danielle Yapl
Batteries
Battery
Weight
Wh/kg
Cost
Silver-Zinc (AgZn) kg
110
~$10,000
Lithium-Monofluoride (Li/CF)
130
Lithium/Thionyl Chloride (Li/SoCl2)
185
Estimate Cost: < $10, Weight: kg
Reference: Danielle Yapl
AAE 450 Spring 2008
Avionics