Nonorthogonal Aerial Optoelectronic Platform Based on Triaxial and Control Method Designed for Image Sensors.

Quanchao Li,Lei Li,Liu Zhang,Yulei Xu,Shuyan Xu

doi:10.3390/s20010010

Abstract

A traditional aerial optoelectronic platform consists of inside and outside multilayer gimbals, while an internal gimbal and drive components occupy the internal space where optical sensors are located. In order to improve the replaceability of optical sensors and to increase their available space, this paper introduces a nonorthogonal aerial optoelectronic platform based on three axes; we carried out research on its drive control method. A three-dimensional structure of an aerial optoelectronic platform was designed. A noncontact drive of a linear voice coil motor was introduced, and a drive control scheme of a proportional integral and a disturbance observer was adopted. Finally, simulations and experiments were carried out. Results showed that the aerial optoelectronic platform could effectively release three times the image sensor space, and the servo bandwidth was 60.2 Hz, which was much better than that of traditional two-axis and four-gimbal platforms. The stability accuracy of the system reached 4.9958 micron rad, which was obviously better than that of traditional gimbals. This paper provides a reference for the design of new optoelectronic platforms.

Highlights

IntroductionAn aerial optoelectronic platform can continuously measure its attitude and position [1,2] due to carrier disturbance (e.g., missiles, aircraft, and ships), accurately maintain a dynamic attitude reference, and realize the automatic tracking [3,4,5] of a maneuvering target through image sensors
An aerial optoelectronic platform can continuously measure its attitude and position [1,2] due to carrier disturbance, accurately maintain a dynamic attitude reference, and realize the automatic tracking [3,4,5] of a maneuvering target through image sensors
Taking the yaw axis as an example, the inner carrier of the rotating platform is controlled by the Taking the yaw axis as an example, the inner carrier of the rotating platform is controlled by the voice coil motor to check angular-motion range, angular velocity, and angular-acceleration voice coil motor to check angular-motion range, angular velocity, and angular-acceleration capabilities; capabilities; servo control bandwidth of the optoelectronic platform was tested.the

Summary

Introduction

An aerial optoelectronic platform can continuously measure its attitude and position [1,2] due to carrier disturbance (e.g., missiles, aircraft, and ships), accurately maintain a dynamic attitude reference, and realize the automatic tracking [3,4,5] of a maneuvering target through image sensors. In recent years, it has been widely used in military and in civil fields such as public security, fire protection, and environmental monitoring [6,7]. Image recognition must fully take advantage of high resolution, and at the same time overcome the effect of scanning motion from the algorithm, so that an error in mechanical transmission will not directly affect the final image recognition accuracy

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Discussion

Conclusion