在数字化测量中经常面临坐标转换的问题，转换参数在很大程度上影响着最终测量精度。在采用bursa模型求取转换参数时一般是通过3个以上公共点利用最小二乘法求取，但其中的系数矩阵往往是病态的，使转换参数并不可靠。现采用7参数法，对布尔沙模型进行泰勒展开，建立了适用于大旋转角的线性化坐标系转换模型。%In the digital measurement, the problem of coordinate transformation is often faced with. The transformated parameters may have direct influence on the measurement accuracy. These parameters can be obtained with least square at least three common points on Bursa model. Because of the il-posed coefficient matrix, the obtained parameters are unreliable. By linearizing the model of Bursa-Wolf, Taylor is expanded and the linearized model of coordinate transformation is built, in order to be suitable for large ro-tation angle.
展开▼
