| Trajectory correct fuze for rocket designed in this paper could reserve basic design of projectile with safe & arming function and detonate function, adding trajectory correct function, could accomplish correction of range and direction, then would detonate around destined aim, so improve the demolished extents and shot precision. This article basing on pre-research project "Trajectory correct technology on range and direction" belongs to intelligent detecting technology and intelligent controlling technology.Firstly ordinary trajectory dynamics of rocket is analyzed, and main factors influencing precision of drop point is discussed, then rocket trajectory model for trajectory correct and accurate detonated fuze is chosen and analyzed. Based on rocket trajectory model, theoretical data of certain points of trajectory is calculated and found by shot table.After discussing the modern navigation system application and information amalgamation theory, navigation system composed of embed GPS/ Magnetic trajectory detecting part and DSP trajectory data processor is given. Application of Discrete Wavelet Transform (DWT) for discard noise is suggested, and GPS/ Magnetic detecting trajectory information amalgamation by Carlm theory is given and shown by MATLAB.GPS receiver composed of small GPS OEM board and GPS mini-antenna isdesigned, and pose's magnetism data detecting part by high precision Magnetic resistor sensor is designed, and DSP trajectory data processor hardware and software is also given. After discussing control theory of correction pill, pose correction part composed of FPGA controller and small impulse gas generators is given. Trajectory observing program on computer is designed by Visual Basic language, and portable trajectory observe apparatus is designed by AVR chip. At last navigation system is tested by vehicle and result of test is shown by step-motor, then data is analyzed.
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