Name
Abstract | ||
|---|---|---|
Ring laser gyro (RLG) can work in mechanically dithered mode or rate-biased mode according to the working state of the inertial navigation system (INS). It can change from one mode to the other by receiving outer instructions. To evaluate the performance of RLG in rate-biased mode, an inertial measurement unit (IMU) based on RLG is installed on a dual-axis turntable, the turntable offers a constant angular velocity to the RLGs, in that way RLG can work in the rate-biased mode. A calibration method is proposed to calibrate the scale factor error, misalignments and constant bias of RLG in rate-biased mode, experiment results show that the differences of scale factor of the three gyros in two modes are 9 ppm, 7 ppm and 3.5 ppm, the constant biases of the three RLGs in rate-biased mode are also different from that in mechanically dithered mode with the difference of 0.017 degrees/h, 0.011 degrees/h and 0.020 degrees/h, the input axis misalignment angle of RLGs in different modes also changed. What is more, a calculation method of angle random walk (ARW) of RLG in rate-biased mode is also presented. Experimental results show that the ARW of the RLG in rate-biased mode is about one third of that in mechanically dithered. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.3390/s19214754 | SENSORS |
Keywords | Field | DocType |
gyroscopes,calibration,ring laser gyroscopes,angle random walk | Scale factor,Inertial navigation system,Gyroscope,Random walk,Optics,Electronic engineering,Constant angular velocity,Ring laser gyroscope,Inertial measurement unit,Engineering,Calibration | Journal |
Volume | Issue | ISSN |
19 | 21 | 1424-8220 |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Zengjun Liu | 1 | 6 | 2.02 |
| lei wang | 2 | 6 | 1.37 |
| Kui Li | 3 | 0 | 1.01 |
| Jingxuan Ban | 4 | 0 | 0.34 |
| Meng Wang | 5 | 3094 | 167.38 |