NAVSYS has developed an affordable,
extremely accurate, and superior performing Time and Space
Position Information (TSPI) System for aircraft and automotive
performance envelopes, temperature and vibration environments.
The NAVSYS TSPI System will allow the user to rapidly perform
developmental, acceptance, and qualification testing at levels
not achievable through other means. The system enables a “rangeless”
testing capability to the user. The NAVSYS TSPI provides the
user with dynamic position accuracy of 1.0 ft, velocity 0.1 ft/sec,
acceleration 50 micro g's, heading 1.0 milliradian,
and pitch/roll 0.5 milliradian. The system's miniature
flexible designe enables it to fit into a variety of existing
small and restrictive enclosures.
The NAVSYS TSPI was developed to first fly in the newest
Lockheed Martin F-16 through virtually all flight envelopes.
It consists of a high accuracy GPS receiver, coupled with
an IMU. There are also automated GPS ground stations (number
required varies depending on the area of operation) that provide
precise GPS reference data.
This system can provide unprecedented vehicle performance
accuracies though all phases of operation. Additionally, TSPI
data can be synchronized and combined with other available
vehicle performance sensors to enable precise modeling and
analysis of the vehicle’s dynamics.
The NAVSYS TSPI consists of both an in-vehicle system and
a stationary ground system. The in-vehicle equipment contains
the integrated GPS receiver, IMU, processor, power supply,
required I/O, and data storage capability. The ground system
includes several ground stations (exact number of ground stations
is dependant on the area of coverage desired by the user).
Each station is self powered autonomous system that contains
its own GPS receiver, data storage capability, communications
link, and power supply.
The in-vehicle and ground systems work independently of each
other, but the recorded data from both systems is used to
perform the post-processing analysis required to achieve the
desired accuracies.
|
|
| In-Vehicle
System Major Components |
| Processor |
Transmeta Crusoe
667 MHz
512 MB RAM
Extended temperature |
|
IMU |
0.3°/rt-hr
0.065 ft/sec/rt-hr
(85 mG/rt-Hz) |
| GPS |
12-channel
L1/L2 |
| Storage |
1 GB capacity
Extended temperature |
| Power |
50 W, 28 V dc |
| Environmental |
Temperature: -40
to
+185 °F
Altitude: >50,000 ft |
|
 |
| Ground
System Major Components |
| GPS |
12-channel L1/L2
Data logger |
| Storage |
512 MB Capacity |
| Comm |
Wireless
Modem
Landline Modem |
| Power |
Solar cells & stands
Battery & 115 V ac |
|
|
| Accuracy |
| Position |
< 1 ft vertical,
< 0.5 ft horizontal |
| Velocity |
< 0.1 ft/sec |
|
Acceleration |
0.1 gee |
| Attitude |
1.5 mrad |
| Attitude rate |
45 mrad/sec |
|
|
