Transcript Slide 1

ATA’s Nanoradian-Class
Rotational Sensors
10 November 2009
ATA Overview
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Founded 1975 A-TECH Corporation,
d.b.a. Applied Technology Associates
Customers Include USAF, Sandia NL, US
Army, MDA, NASA, US Navy, and
Aerospace and Defense Companies
Approximately 250 Employees
Awards and Distinctions
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2008 Minority Manufacturer of the Year
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2004 SBA National Prime Contractor of the
Year
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2005 NM Innovator of the Year
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USAF Small Business R&D Awards
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SBA Administrator’s Award
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Multiple Patented Technologies
Operating Sites in New Mexico
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ATA 1300 Britt Street, Albuquerque, NM
Headquarters
Kirtland AFB – AFRL and Big Crow Support
Sites
North Oscura Peak, WSMR AFRL Laser
Test Facility
Las Cruces, NM WSMR Support Site
ATA is an Established Technology Company with a Proven Track Record
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ATA Overview Cont’d
• ISO-9001 Certified
• Class 10,000 Clean Room
• Approved Vendor
Raytheon
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Ball Aerospace
Lockheed Martin
Boeing
Raytheon
• Produced Space Qualified
Hardware
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Lockheed Martin
Boeing
Raytheon
Sandia National Laboratories
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Overview
• ATA has a history of inventing sensors in response to
customer requests or internally identified needs
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MHD ARS Sensing Concept
Angular
Velocity
(rad/s)
Sensitive
Axis
Voltage
Output
Proportional
to Angular
Rate
w
Electrode
Areas
E
Conducting
Fluid
Uq
B
Electric
Field
Relative
Velocity
Magnetic
Flux
Density
Permanent
Magnet
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S
N
High Performance
High Bandwidth: > 1,000 Hz
Low Noise Floor: <100 nrad NEA (1-1kHz)
High Dynamic Range: > 100 dB
Low Cross-Axis Sensitivity
Simple Design
Small Size: 1.0 x 1.0 x 1.3”
Low Weight: 100 grams
Low Power: < 0.3 Watts
Rugged Design: > 1,000 g
MHD Sensor
• The MHD concept resulted from an Air Force
request for alternate angular sensing techniques
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Augmenting Sensors with
Other Technologies
• Radiation-tolerant design
(100Krad environment)
• ATA designed and
implemented FPGA
processing architecture,
collaborated in board
design
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Microradian-Class Testing
• ATA has developed test facilities and techniques
suitable for a range of motion profiles
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ARS Specifications
Model
ARS-06
ARS-15
ARS-14
ARS-24
Range
+200 rad/s
+10 rad/s
+0.5 rad/s
+0.005 rad/s
Scale Factor
50mv/rad/s
1 V/rad/s
20 V/rad/s
2120 V/rad/s
-3dB Bandwidth
0.4 - 1kHz
4 – 1kHz
1 – 1 kHz
1 – 675 Hz
Rate Noise, 1-1kHz
4.7 mrad/s
27 μrad/s
5 μrad/s
1 μrad/s
Displ. Noise, 1-1kHz
50 μrad
0.8 μrad
50 nrad
8 nrad
Dimensions (inches)
0.7 x 1
0.8 x 0.8 x 1.2
1 x 1.3 x 2.9
2x2x4
35
60
200
2000
Mass (grams)
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Frequency Response Magnitude
ATA MHD ARS Frequency Response Magnitude
(FR Magnitude quoted at 10 Hz)
80.00
ARS-24 (2120 V/rad/s)
70.00
FR Mag (dB ref 1V/rad/s)
60.00
50.00
40.00
ARS-14 (20 V/rad/s)
30.00
20.00
10.00
ARS-15 (1 V/rad/s)
0.00
-10.00
ARS-06 (0.05 V/rad/s)
-20.00
-30.00
-40.00
-50.00
0.1
1.0
10.0
Frequency (Hz)
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100.0
1000.0
Frequency Response Phase
ATA MHD ARS Frequency Response Phase
180.00
Phase (degrees)
90.00
0.00
-90.00
-180.00
0.1
1.0
10.0
Frequency (Hz)
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100.0
1000.0
Rate Noise
ATA MHD ARS Rate Noise
(Noise quoted from 1-1000 Hz)
1.0E-06
ARS-06 (4.67 mrad/s RMS)
1.0E-07
1.0E-08
1.0E-10
2
(Rad/s) /Hz
1.0E-09
1.0E-11
ARS-15 (26.6 μrad/s RMS)
1.0E-12
1.0E-13
ARS-14 (2.84 μrad/s RMS)
1.0E-14
1.0E-15
ARS-24 (0.36 μrad/s RMS)
1.0E-16
0.1
1.0
10.0
Frequency (Hz)
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100.0
1000.0
Displacement Noise
ATA MHD ARS Displacement Noise
(Noise quoted from 1-1000 Hz)
1.0E-06
1.0E-07
1.0E-08
1.0E-09
1.0E-10
1.0E-11
2
(Rad) /Hz
1.0E-12
1.0E-13
1.0E-14
1.0E-15
1.0E-16
1.0E-17
1.0E-18
ARS-06 (50 μrad RMS)
1.0E-19
ARS-15 (0.8 μrad RMS)
1.0E-20
1.0E-21
ARS-14 (40 nrad RMS)
1.0E-22
1.0E-23
ARS-24 (5 nrad RMS)
1.0E-24
0.1
1.0
10.0
Frequency (Hz)
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100.0
1000.0
0.1 μG Accelerometer
• These radiation hardened DC accelerometer
units can measure microradian-level tilts in
the presence of strong background
acceleration (0.25g rms +).
Dennis
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Seismically Stable Platform
Tilt Sensor (1990)
Noise
-174 dB rad
Corner
6.9 mHz
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Northfinder
• Current effort underway to develop a 1 mrad
Northfinder
• Based on modulating earth rate onto the ARS-14
by rotating a horizontal sensor in the earth’s
rotation field
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