翼尖支撑双天平校准技术研究

翼尖支撑测力试验技术采用两台天平同时对同一风洞模型进行测力，开展双天平校准技术研究是实现该项试验技术成功应用的关键。基于双天平测量机理，研究并建立了双天平校准技术：利用两台单天平的校准公式，根据空间力系合成原理和天平载荷分量干扰修正技术构建了双天平同时工作的公式。通过对某专用双天平的单独校准、组合校准及风洞试验，对提出的双天平校准技术进行了验证。结果表明：双天平校准技术合理、可靠，可操作性强，能够为翼尖支撑测力试验技术提供必要的理论基础和试验依据。

Research on calibration technique of twin balances for the wing-tip support

It is a key to study calibration technique of twin balances used for force-measure- ment test on supporting wingtips in wind tunnel, in which twin balances are used simultaneously to measure aerodynamic loads of the model. Based on measure principle of twin balances, a new complex formula for twin balances is determined, it＇s depending on the both calibration formulas for two balances according to spatial force system synthesis principle and interference correction technology among balance components, which is carried out by calibrating the special twin bal- ances separately and synthetically, and is validated with wind tunnel tests. The results show that the calibration technique of twin balances is reasonable and credible, while the maneuverability is well. This technology can serve as the essential theoretical and test basic for the wing-tip support force-measurement test technology wing-tip support.