Study On DSP In GPS/SINS Integrated Navigation System

Strapdown Inertial navigation system (SINS) is a kind of autonomous navigation system that developed in the early twentieth century, and it free from outside interference. The basic principle of INS is based on Newton's laws of mechanics, by measuring the acceleration of carriers in the inertial reference system, the integration of its time, and it transforms into the navigation coordinates, so it can be able to get speed, yaw angle and location information in the navigation coordinate system. But its location error accumulates over time, long working hours will produce large errors, making the inertial navigation systems are not suitable for long-distance navigation. Global Positioning System (GPS) is a kind of space satellite-based radio navigation and positioning system, with 24 satellites, not only to include air, land, sea and even outer space, provide all-weather, all time, continuous, accurate information. The high accuracy of GPS is unmatched by other systems. But its main drawback is that anti-jamming ability, vulnerability to environmental and other factors. In addition, GPS receiver, data update frequency is low (usually once per second), making it difficult to meet the requirements of real-time control.Combined with the advantages and disadvantages of two navigation systems, INS/GPS has many advantages. Make full use of both advantages and complement each other. It is the most popular and most reliable method.The purpose of this paper is to design integrated navigation system, and to research related technology. The main work includes:first introduces the significance of the projects, development history and present status, as well as the development of domestic and international navigation systems and DSL digital signal processing applications; followed by analysis of the GPS/SINS Integrated Navigation System basic principles, and on this basis, design of information fusion is proposed; in the third chapter describes the GPS/SINS integrated navigation system hardware design, and highlighted the data acquisition module and data processing module design; in the fourth chapter describes the integrated navigation system software design; fifth chapter is integrated navigation system simulation and testing, given accelerometers and gyroscopes to test data, analyze the causes of system errors, and proposes ways to improve the measurement accuracy; Finally, a summary of the full text.The navigation system, small size, high accuracy and strong real-time, performance has greatly improved than a single navigation system, can be widely used in aviation aircraft, ships, ground vehicles and other moving vehicle navigation...