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基于光学悬丝吊架试验台提出了一种运用丝牵引并联机构标定非匀质不规则形状物体质心位置的新方法。该方法首先对光学悬丝吊架试验台的工作原理进行简化建立基准数学模型,形成质心标定数学模型,随后针对质心标定数学模型进行静力学分析,通过坐标变换与矩阵运算方法获得在全局坐标系与局部坐标系下的解析解。并且针对此测量方法进行了测试试验,并对测量方法的主要误差来源进行了分析,最终提出了提高测量精度的有效措施。
A new method of calibrating the centroid position of non-uniform irregular shape objects by using wire-pulling parallel mechanism was proposed based on optical suspension hanger test rig. Firstly, the working principle of the optical suspension hanger test bench is simplified to establish a reference mathematical model to form a centroid calibration mathematical model. Subsequently, the centroid calibration mathematical model is used for static analysis. Coordinate transformation and matrix operation are used to obtain the global coordinate system And local coordinate system. And the test method is tested and the main sources of error of the measurement method are analyzed. Finally, some effective measures to improve the measurement precision are put forward.