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Airborne Distributed Position and Orientation System Transfer Alignment Method Based on Fiber Bragg Grating

机译：基于光纤布拉格光栅的机载分布式位置定向系统传递对准方法

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摘要

With the demand for high resolution remote sensing, load array technology has gradually become an effective measure to improve imaging resolution. However, the external flow and internal engine vibration disturbance may lead to the flexible deformation of wings. The traditional rigid baseline error compensation method cannot solve the problem of serious coupling movement error caused by flexible deformation. To address the problem, a transfer alignment model based on fiber Bragg grating for distributed position and orientation system is proposed in this paper. Firstly, based on the multidimensional requirements of flexible deformation information, the layout scheme of fiber Bragg grating was designed, then the continuous strain in the wing surface was obtained after the quadratic fitting of strain measured by fiber Bragg gratings, and the deformation displacement and angle are calculated. Thirdly, flexible deformation compensation for distributed position and orientation system based on fiber Bragg grating was studied. The state equation including position error, velocity error, misalignment angle, and inertial device error was established. The position and attitude information compensated by the flexible lever arm was used as the quantitative measurement. The filtering estimation improved the measurement accuracy of the slave inertial navigation systems. At last, the experiment was carried out and showed that the accuracy of the transfer alignment has been improved significantly.
机译：随着对高分辨率遥感的需求，负载阵列技术逐渐成为提高成像分辨率的有效措施。然而，外部流动和内部发动机的振动干扰可能导致机翼的柔性变形。传统的刚性基线误差补偿方法不能解决柔性变形引起的严重的联轴器运动误差的问题。为了解决这个问题，本文提出了一种基于光纤布拉格光栅的分布式定位系统定向对准模型。首先，根据柔性变形信息的多维要求，设计了光纤布拉格光栅的布置方案，然后对光纤布拉格光栅测得的应变进行二次拟合，求出机翼表面的连续应变。计算。第三，研究了基于光纤布拉格光栅的分布式定位系统的柔性变形补偿。建立了包括位置误差，速度误差，偏心角和惯性装置误差在内的状态方程。通过柔性杠杆臂补偿的位置和姿态信息用作定量测量。滤波估计提高了从惯性导航系统的测量精度。最后进行了实验，结果表明转移对准的准确性得到了显着提高。

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