变速变姿态下飞机燃油体积解算技术

发布时间：2018-09-07 19:29

【摘要】：为准确测量飞机不规则油箱内的燃油体积,在传统的查表插值法基础上,提出了基于等效传感器的自适应步长切割法(ASCM),用于建立燃油质量特性数据库,通过引入等效传感器概念,实现了不同姿态下多传感器的信息融合;该方法根据切片截面积的变化率调整切割步长,从而减小了燃油体积解算时的插值误差;利用多传感器的输出值实现了燃油平面的最小二乘(LMS)拟合,当有效传感器较少时,再结合等效燃油平面姿态角拟合燃油平面,消除了加速度对燃油平面的影响;对传统的三维查表插值法进行改进,减小了由于燃油平面姿态角插值引起的误差。基于UG二次开发,设计了燃油体积解算平台。实际油箱CAD仿真验证结果表明:该方法所建的数据库数据规模小,燃油解算速度快,实现了加速度和姿态误差修正,并减小了差值误差,进一步提高了燃油的测量精度。
[Abstract]:In order to accurately measure the fuel volume in the irregular fuel tank of aircraft, an adaptive step size cutting method (ASCM),) based on equivalent sensor is proposed based on the traditional look-up table interpolation method to establish the database of fuel quality characteristics. By introducing the concept of equivalent sensor, the multi-sensor information fusion under different attitude is realized, and the cutting step size is adjusted according to the change rate of slice sectional area, thus reducing the interpolation error in fuel volume calculation. The least square (LMS) fitting of the fuel plane is realized by using the output value of the multi-sensor. When the effective sensor is less, the fuel plane is fitted with the equivalent fuel plane attitude angle, which eliminates the influence of acceleration on the fuel plane. The traditional three dimensional look-up table interpolation method is improved to reduce the error caused by the fuel plane attitude interpolation. Based on the secondary development of UG, a fuel volume calculation platform is designed. The results of CAD simulation of fuel tank show that the proposed method has the advantages of small data scale, fast fuel calculation speed, acceleration and attitude error correction, and the decrease of difference error, which further improves the measuring accuracy of fuel.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;先进航空发动机协同创新中心;北京航空航天大学航空科学与技术国家实验室(筹);
【分类号】：V228.1;TP311.13

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