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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Qiuying Li, Yibing Diao, Ming Gao, Wei Yu, Fei |
| Abstract | This study presents a novel estimation method for fast initial coarse alignment of a shipborne strapdown inertial navigation system. Unlike several current techniques, the alignment accuracy of the presented estimation method is not reduced by the shipborne disturbances causing by wave action (when moored) and the inertial measurement unit output constant error. The coarse alignment method is based on the acceleration sensed by accelerometers and the attitude matrix respect to the inertial frame sensed by star sensor. The specific force along the inertial frame is derived from the acceleration sensed by accelerometers, and the information characteristics of the specific force along the inertial frame are discussed. The analysed results show that the constant and periodical information is included in the transformation specific force along the inertial frame. Therefore Butterworth low-pass filter is used to extract the constant information to calculate the attitude of the vehicle. The effectiveness of this approach was demonstrates by simulation and experimental study. The results showed this coarse alignment method can estimate attitude information, and the attitude errors of the alignment result are small angles. Therefore the alignment accuracy meets the demands of fine alignment. |
| Starting Page | 852 |
| Ending Page | 860 |
| Page Count | 9 |
| ISSN | 17518822 |
| Volume Number | 9 |
| e-ISSN | 17518830 |
| Issue Number | Issue 7, Oct (2015) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-smt/9/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2015.0024 |
| Journal | IET Science, Measurement & Technology |
| Publisher Date | 2015-05-05 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Acceleration Acceleration Measurement Acceleration Sensing Accelerometer Attitude Error Attitude Estimation Attitude Matrix Attitude Measurement Butterworth Filter Butterworth Low-pass Filter Coarse Alignment Accuracy Constant Information Extraction Image Sonsor Inertial Frame Sensing Inertial Measurement Unit Output Constant Error Inertial Navigation System Inertial System Low-pass Filter Matrix Algebra Measurement Error Rotation Measurement Sensing And Detecting Device Sensing Device And Transducers Shipborne Strapdown Inertial Navigation System Spatial Variables Measurement Star Sensor Star Trackers Velocity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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