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Flight test results of the strapdown ring laser gyro tetrad inertial navigation system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Carestia, R. A. Hruby, R. J. Bjorkman, W. S. |
| Copyright Year | 1983 |
| Description | A helicopter flight test program undertaken to evaluate the performance of Tetrad (a strap down, laser gyro, inertial navigation system) is described. The results of 34 flights show a mean final navigational velocity error of 5.06 knots, with a standard deviation of 3.84 knots; a corresponding mean final position error of 2.66 n. mi., with a standard deviation of 1.48 n. mi.; and a modeled mean position error growth rate for the 34 tests of 1.96 knots, with a standard deviation of 1.09 knots. No laser gyro or accelerometer failures were detected during the flight tests. Off line parity residual studies used simulated failures with the prerecorded flight test and laboratory test data. The airborne Tetrad system's failure--detection logic, exercised during the tests, successfully demonstrated the detection of simulated ""hard'' failures and the system's ability to continue successfully to navigate by removing the simulated faulted sensor from the computations. Tetrad's four ring laser gyros provided reliable and accurate angular rate sensing during the 4 yr of the test program, and no sensor failures were detected during the evaluation of free inertial navigation performance. |
| File Size | 27024996 |
| Page Count | 74 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840003089 |
| Archival Resource Key | ark:/13960/t41s1n52k |
| Language | English |
| Publisher Date | 1983-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Communications And Navigation Accelerometers Flight Tests Tetrad Theory Ring Lasers Laser Gyroscopes Strapdown Inertial Guidance Parity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
