The Low-Cost GPS/SINS Integrated Navigation System

In order to satisfy the requirements of high precision and low-cost of modern navigation system, the GPS/SINS integrated navigation system is one kind of better plans. This paper aimed to improve the reliability and accuracy of the positioning system and reduce the cost at the same time.The design theory and engineering application of low-cost GPS/SINS integrated navigation system is studied in this paper. A low-cost GPS/SINS integrated navigation system is designed by using low-cost IMU and GPS-OEM board, ARM processor and LCD, which was implemented on hardware. Through analyzing the integrated model of GPS/SINS integrated navigation system, the system design adopts the position-velocity integrated model which is easy to realize in the engineering application. Due to the adoption of feedback, the precision of the SINU has been improved. The SINU iterative algorithm was deduced in details, which contains initial alignment algorithm, attitude update algorithm, velocity update algorithm, and position update algorithm. Based on the research of SINS navigation algorithm, the low-cost SINS/GPS integrated navigation algorithm is designed in this paper. In this paper the algorithm flow chart has been given and this algorithm is also programmed. The GPS receive and the LCD display program is designed, and the program flow diagram is also given in this paper. The experiment data of the low-cost GPS/SINS integrated navigation system is analyzed. The result shows that the positioning error of the integrated navigation system is less than 15m, and the precision is highly improved. Finally, the improved project is introduced. The results have practical value for engineering applications.