Calibration platform design for combined magnetic encoder

The seeker is the core device used by cruise missiles to achieve autonomous tracking of targets and guidance of the loitering munition. Generally speaking, a dual frame structure is adopted, and the joint linkage of the inner and outer frames achieves the angle deviation of the imaging system relative to the missile body. The rotation angle of the frame platform is measured by a magnetic encoder installed on the rotating end of the frame. In order to achieve high accuracy and resolution, magnetic encoders are difficult to achieve solely through hardware design and require the use of a series of software algorithms. This article designs and builds a new calibration experimental platform, which uses a new signal processing method based on calibration principles and uses the lookup table method to calibrate the encoder. This platform improves the angular displacement detection accuracy of the combined magnetic encoder, which can greatly improve the performance of loitering munition.