Abstract
This paper presents an approach to seeker-azimuth determination using the gyro rotor and optoelectronic sensors. In the proposed method, the gyro rotor is designed with a set of black and white right spherical triangle patterns on its surface. Two pairs of optoelectronic sensors are located symmetrically around the gyro rotor. When there is an azimuth, the stripe width covering the black and white patterns changes. The optoelectronic sensors then capture the reflected optical signals from the different black and white pattern stripes on the gyro rotor and produce the duty ratio signal. The functional relationship between the measured duty ratio and the azimuth information is numerically derived, and, based on this relationship, the azimuth is determined from the measured duty ratio. Experimental results show that the proposed approach produces a large azimuth range and high measurement accuracy with the linearity error of less than 0.005.
Highlights
One of the most common problems in navigation and positioning is the determination of the azimuth [1]
Considering this merit, a noncontact approach is proposed to measure the large azimuth angles by detecting pattern information on the surface of gyro rotor based on the optoelectronic sensor
A new approach for determining the azimuth of the seeker is proposed based on the gyro rotor and optoelectronic sensors
Summary
One of the most common problems in navigation and positioning is the determination of the azimuth [1]. In contrast to the electromagnetic technique, the optoelectronic sensors provide a noncontact measurement method that is effective at avoiding the electromagnetic interference Considering this merit, a noncontact approach is proposed to measure the large azimuth angles by detecting pattern information on the surface of gyro rotor based on the optoelectronic sensor. The optoelectronic sensors capture the reflected optical signals from the varied black and white pattern on the gyro rotor and produce the duty ratio signal. According to the functional relationship between the measured duty ratio and the azimuth information, the azimuth is determined from the measured duty ratio This method effectively avoids the electromagnetic interference and achieves large azimuth measurement with high accuracy.
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