Research On GPS/SINS/SAR Integrated Navigation Information Fusion And Error Correction Technology

With the development of aerospace technology, navigation technology is demanded increasingly high, due to system's own shortcomings and limitations of the traditional navigation, traditional single navigation system has been very difficult to meet the requirements. Therefore, integrated navigation system has become the current and future development direction of navigation technology focus, and also the focus of national defense technology research.In this paper, GPS/SINS/SAR integrated navigation system is studied systematic. In the integrated navigation system, the main technologies include navigation information fusion and error correction technique, Kalman filtering in the integrated navigation data fusion processing occupies an important position.In this paper, the GPS/SINS/SAR integrated navigation system is in-depth studied, on the composite system navigation errors are corrected. It has some reference value for the high-precision navigation. The integrated navigation system information fusion pretreatment is studied on it, mainly complete the navigation information time registration, using Kalman filter realize the GPS/SINS integration of data fusion, obtain the navigation optimal solution. Navigation algorithm is simulated and the navigation error is analysis. It verifies the reliability of integrated navigation system, increased system redundancy and improve overall system fault tolerance and information credibility. Aided Navigation of the image matching is also studied, when the role of the GPS is lost, the SAR Image Matching technology works, aiding inertial navigation, in order to achieve navigation accuracy requirements. Using canny detection operate the navigation image edge, improved Hausdorff algorithm is used in image matching, image matching on how to reduce the amount of computation to achieve fast matching for analysis, and image matching algorithm is simulated.