The composition and principles of the digital measuring system based on digital oil measuring method was investigated. Fly attitude-oil quality-measuring height data tables were generated using UG software calculation of oil quantity characteristics, the oil surface angle under different fly attitude and overload was calculated through coordinate transformation method, the amount of oil was calculated by three-dimensional liner interpolation method. The free surface movement of lubricating oil tank under different overload was simulated through VOF numerical model. The results show that using UG software to build model and generate fly attitude-oil quantity-measuring height data tables is accurate and useful. The VOF model method is a complement to digital measurement,which can track the phase interface of continuum, analyze the movement of oil qualitatively and calculate the dead volume of digital method.%分析基于数字式油量测量方法的数字式测量系统的组成和测量原理.采用以UG软件为基础的润滑油质量特性计算方法生成姿态-油量-高度数据表,用坐标变换的方法计算不同飞行姿态不同过载下的油液液面角,用三维线性插值的方法计算润滑油量.并利用VOF数值计算模型对不同过载下润滑油箱中的自由液面的运动情况进行模拟.结果表明:利用UG建模生成姿态-高度-油量数据表的方法准确实用,用VOF模型方法追踪连续介质的相界面,对润滑油的运动情况有定性的认识,而且能对数字式测量方法的测量死区进行数值模拟并计算其对应的体积,是对数字式测量的一个补充.
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