Magnetoresistive Sensor-based Missile Attitude Measurement Technology Research

In recent years, with the rapid development of microelectronics technology, modern sensor technology, computer technology and the applications in weapons, normal ammunition is given a new vitality. Acquisition the variety of projectile flight attitude is significant for missile design, aerodynamics and the guidance of a projectile. So it is indispensable to study the real-time measurement of projectile flight attitude information.A measurement scheme is designed based on three-dimension magnetic sensors according to the need of one type of the Trajectory Correcting ammunition. The characteristics of common attitude measurement sensors and the calculation algorithm are analyzed. The hardware design and software design are completed. Experiments are carried out for verifying effectiveness of system. Main work could be summarized in following:(1)The common characteristics of attitude measurement sensor are analyzed. The basic theory of the geomagnetic field and the reference models are introduced, and the advantages of magnetic field detection for attitude measurement are demonstrated in this dissertation.(2)Details the missile attitude measurement coordinate system and their mutual conversion, the attitude calculation mathematical model is derived, focusing on the use of iterative method derived attitude angle correction process.The correcting algorithm for attitude angle measurement is derived based on Iterative method.(3)A three-dimensional magnetic sensor is a combination of a two-dimensional magnetic sensor and a one-dimensional magnetic sensor. With the electronic theodolite and the optical encoder, the experimental system is designed.(4)Experiments carried out on the rotate platform verify the effectiveness of error compensation. The real ammunition shooting data prove the drift when distinguish the roll angle by zero-output. It is valuable and necessary for further research.