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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2
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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Use or disclosure of this sheet is subject to the restriction on the title page of this document.
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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4
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
+
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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7
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)
Use or disclosure of this sheet is subject to the restriction on the title page of this document.
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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13
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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