基于单分量天平的机翼部件铰链力矩测量方法研究

Study on a hinge moment measurement method of wing component based on single-component wind tunnel balance

在机翼部件铰链力矩风洞试验中,常采用片式应变天平进行测量。受模型空间限制,传统天平测量精准度较低。针对该问题,研制了一种单分量铰链力矩天平测量技术,设计了新的天平结构,在机翼与测量舵的连接中使用了微型机械轴承,能抑制铰链力矩以外的干扰载荷,保证测量舵转轴与实际转轴一致,通过改变天平安装位置,减小了由于模型外型面破坏对测量舵气动特性的影响,从而提高了铰链力矩的测量精准度。天平静校准度达到0.12%,而且通过了风洞试验验证,该技术能有效测量机翼副翼铰链力矩。

The thin flat strain gauge balance is often used in the wing component hinge moment wind tunnel test. Limited by the model fitting space,the traditional thin flat strain gauge balances have lower accuracy. Aiming at this problem,a single-component hinge moment balance measurement technique was developed,and a new balance structure was designed. The use of micro-mechanical bearing in the connection of the wing and the rudder can suppress the interference load besides the hinge moment to ensure that the measured rudder shaft is consistent with the actual shaft. By changing the installation position of the balance,the influence on the aerodynamic characteristics of the measurement rudder is reduced due to the damage of the profile appearance of the model,thereby the measurement accuracy of the hinge moment is improved. The balance has a static calibration of 0. 12% accuracy and has passed the wind tunnel test,which can effectively measure the aileron hinge moment.