一种基于检验载荷的自动选电桥方法

A Method of Selecting Electrical Bridge by Computer Based on Validation Loads

电桥选择在飞机结构载荷应变计测量方法中占有重要地位,直接关系着载荷测量的准确性。给出一种基于检验载荷的电桥选择方法,并将之应用于起落架载荷校准的应变计选择,并对其结果进行了分析。结果表明:该方法不但具有计算机自动选电桥的优点,而且还可保证所选载荷方程的精度;随着所选电桥个数的增多,预测误差有先减小,然后趋于平缓,最后增大的变化趋势。

Selection of electrical bridge is important in determining aircraft loads by strain gage measurement,which has large effects on the prediction of loading equation.A method based on validation loads for the selection of electrical bridge was given,and applied to the load calibration of a landing gear which was also analyzed.The results show that the proposed method not only has the advantage of choosing electrical bridges by computer but also control the error of the load equation.In addition,the errors of the load equations are divided three phases which are respectively,firstly decreasing,secondly reaching the relatively stability,and finally increasing with the number of electrical bridges increasing.