Geomagnetic Signal Attitude Measurement Technology In Trajectory Correction Fuze Applications

This research of this paper belongs to the item of "two-dimensional trajectory correct fuze". The trajectory correct fuze can work well if the information of azimuth and attitude is got correctly and in time during the pill flying. The earth is surrounded by the geomagnetism. The geomagnetism is stable and has some regulation. The pill is always in the geomagnetism during flying. If this can be well used, the information of attitude can be got correctly. The part that detects magnetic data of attitude in this design is using high precision MR sensor. The signal of attitude is processed in requested time and requested precision. At last, the system works out the result of the attitude.The two-dimensional detecting system is designed by using two-axes MR sensor and C8051 single chip, including its set/reset circuitry. Similarly, the three-dimensional detecting system is designed by using three-axes MR sensor and high-powered DSP.Research has been done on the following aspects: how to work out the result of the rolling angle, how to use the information of the attitude to control the time when the canard should be opened in the two-dimensional detecting system and how to work out the result of three angles in the three-dimensional detecting system. By using the date of static experiment and the date of dynamic experiment, some kinds of error in the two-dimensional exploring system are analyzing and the solving methods are given.