变曲率构件转站测量热变形误差的补偿方法  

Method for Compensating Thermal Deformation Error in Transfer Station ofVariable Curvature Workpiece

作　　者：李竺悦 侯茂盛 刘智超[1] 李丽娟[1] Li Zhuyue;Hou Maosheng;Liu Zhichao;Li Lijuan(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun,Jilin 130022,China)

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《中国激光》2021年第11期112-122,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(61703056,61805022)。

摘　　要：温度变化引起的测量误差会严重影响飞行器、船舶等大型先进装备的尺寸,为了保证大型变曲率构件的制造装配精度,缩短大尺寸装备的测量周期,提出了一种新的大尺寸转站测量热变形误差补偿方法。首先,通过光纤布拉格光栅及激光跟踪仪获得温度和基准点的三维位置信息,并建立了对应的数学模型,以解算全局坐标系下的热变形系数矩阵。然后,用ANSYS软件在相同温度载荷下对实验构件的物理模型进行热变形仿真,并对比分析了基准点偏移量的实测数据与仿真数据。最后,用本方法对大型变曲率构件转站测量过程中热变形引起的转站误差进行补偿。实验结果表明,在均匀温度场和非均匀温度场环境下,用本方法补偿后的大型变曲率构件转站测量精度比未补偿时分别提高了81.28%和76.26%。Objective Large-size measurements are usually accomplished through multistation measurements.The accuracy of the instrument,environmental vibration,temperature change,and other factors severely affect the accuracy of the transfer station.To improve the accuracy of large-size measurements,many scholars have conducted extensive research on large-size measurement errors and proposed numerous compensation methods to achieve the accuracy of large-size measurements.However,most compensation methods compensate for the measurement errors by reducing the measurement errors.Moreover,research on the effect of temperature on the measurement results is relatively rare.In fact,the error caused by changes in temperature has severe impacts on the measurement accuracy.Additionally,the experimental steps of most temperature compensation methods are complicated,the model is difficult to solve,and the research object is a regular rectangular or wedge-shaped tooling structure;these disadvantages limit the application of such methods.No study has discussed the characteristics of the variable curvature workpiece,owing to which these compensations exhibit strong limitations in improving the accuracy of large-size transfer stations.To ensure the manufacturing and assembly accuracy of large-size variable curvature components on the actual site and decrease the large-scale measurement cycle,a new method for compensating thermal deformation errors of large-scale transfer stations is proposed and numerous related experiments are designed.Experimental results show that the proposed method can effectively improve the transfer accuracy of large-scale measurements.Methods The new method for compensating thermal deformation errors of large-size transfer stations is a universal method.First,several temperature values and reference point coordinates are obtained using the fiber Bragg grating temperature sensor and laser tracker.Then,all the measured coordinates are converted into the global coordinate system using the station alignment method and t

关 键 词：测量与计量 热变形仿真 温度补偿 转站精度 

分 类 号：V262.44[航空宇航科学与技术—航空宇航制造工程]