低速风洞应变天平通道极性判断方法

Polarity Judgment Method of Low-speed Wind Tunnel Strain Gauge Balance Channel

为提高低速风洞应变天平工作效率,提出一种直接单分量加载判断天平通道极性的方法。通过对单分量加载结果进行估计,筛选不同通道极性组合时的天平计算结果。实验结果表明:该方法能快速、有效地判断天平通道极性,并且不依靠经验,支持自动化程序化运行;对加载精度要求较低,容易满足实用要求。

In order to improve the efficiency of the low-speed wind tunnel strain-gauge balance,a method for judging the polarity of the balance channel by direct single-component loading is proposed.By estimating the results of single component loading,the balance calculation results of different channel polarity combinations are screened.The experimental results show that the method can quickly and effectively judge the polarity of the balance channel,and does not rely on experience,supports automatic programmed operation,and has low requirements for loading accuracy,and is easy to meet the practical requirements.