基于质量线法的大尺寸飞行器质量特性参数一体化测量的仿真研究
The Emulation Study on the Integration Measurement of Mass Property of Large-Size Flight Vehicle Based on Mass Line Method

针对传统方法测量大尺寸飞行器质量特性参数时出现的摆动过程中空气阻尼对测量精度影响较大、难以设计足够尺寸的专用设备等问题，提出基于质量线法的大尺寸飞行器质量特性参数测量方法。推导出了质量线法求解质量特性参数的计算公式。分析了激励点、响应点的选取对测量精度的影响，给出了相关选取原则。利用上述理论，在仿真环境下对某大尺寸飞行器模型进行试验，并将仿真结果与理论值进行了对比，结果显示：质心最大绝对误差为2.20 mm，转动惯量最大相对误差为1.42%，惯性主轴方位角最大偏差为-1.844°。仿真试验证明了该方法准确可靠，可以完成大尺寸飞行器质量特性参数的一体化测量，为后续真实测量提供了理论依据和预实验方法。
Aiming at the problem of measurement precision influenced by air damping and the difficulty of designing special equipment with enough size in traditional mass property measurement methods of larger-size flight vehicle's, the method called Mass Line Method for the measurement of larger flight vehicle is presented. The solving process of mass line method is deduced. The influence of selecting excitation points and response points is analyzed, the selection principle is presented. At the environment of emulation test, the model of larger-size flight vehicle is measured with mass line method, and the result of emulation test is compared with the theoretical result, it shows that: the maximum absolute error of centroid is 2.20mm, the maximum relative error of moment of inertia is 1.42%, the maximum deviation of orientation angles of principal inertia axis is -1.844°. The emulation test result proves the method is accurate and reliable, it can achieve integration measurement for larger-size flight vehicle's mass property, and it provides theoretical foundation and trial test for following actual measurement