光学 精密工程, 2019, 27 (7): 1500, 网络出版: 2019-09-02   

柔性质心测量方法及不确定度评定

Flexible center of gravity measurement method and uncertainty evaluation
作者单位
哈尔滨工业大学 仪器科学与工程学院, 黑龙江 哈尔滨 150001
摘要
为了实现大尺寸飞行器质心的测量, 提出了一种柔性质心测量方法。对该方法的重力作用线测量、坐标转换、质心合成等问题进行了研究并进行了不确定度分析。首先, 测量被测件在任意一个状态下质心在测量设备中的投影, 建立通过该投影的重力作用线并通过坐标转换将重力作用线转换到被测件坐标系下。然后, 将被测件旋转或倾斜任意一个角度, 测量该状态下重力作用线并转换到被测件坐标系中, 通过求得两条重力作用线的交点获得质心。最后, 采用蒙特卡洛仿真分析法对该测量方法进行了不确定度评定。仿真分析表明, 该方法的测量误差≤0.3 mm, 实验结果表明, 质心测量误差≤0.3 mm, 可以在被测件与测量设备相对位置关系未知的情况下实现质心的高精度测量。
Abstract
To measure the center of gravity of a large-sized aircraft, a flexible center of gravity measurement method is proposed. A method to obtain the line that passes through the center of gravity, the coordinate transformation, and the means to obtain the center of gravity itself are also proposed. First, the projection of the line that passes through the center of gravity is measured, and a line that passes through this projection point is established and converted into a coordinate system of the body under test. Second, by means of rotating or tilting the body at any angle, the second line using the same method is measured and converted into the coordinate system of the body. The center of gravity is obtained by finding the intersection of the two lines. Finally, a Monte Carlo simulation analysis method is used to determine the method's uncertainty. Both the simulation analysis and experimental results showed that the center of gravity measurement error is within 0.3 mm. Thus, the proposed method can achieve high-precision detection of the center of gravity even when the position between the device under test and the measuring device is unknown.

王梅宝, 张晓琳, 唐文彦, 王军. 柔性质心测量方法及不确定度评定[J]. 光学 精密工程, 2019, 27(7): 1500. WANG Mei-bao, ZHANG Xiao-lin, TANG Wen-yan, WANG Jun. Flexible center of gravity measurement method and uncertainty evaluation[J]. Optics and Precision Engineering, 2019, 27(7): 1500.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!