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微量滚转力矩测力试验是一项非常重要的风洞试验。相对于常规测力试验,微量滚转力矩测力试验的滚转力矩载荷小,量值在0.5N·m以下,同时滚转力矩载荷与其它的气动载荷量值相差较大,采用应变天平测量微量滚转力矩,很难实现六分量天平结构设计。针对这一问题我们开展了六分量微量滚转力矩天平的研究工作,通过优化天平结构,在现有技术手段的基础上提出了复合式六分量天平结构设计解决方案,不仅实现了六分量微量滚转力矩天平结构设计,而且其滚转力矩系数mx0的测量误差Δmx0<1.1×10-6。本文主要介绍了复合式六分量微量滚转力矩天平研究的关键技术及主要技术措施,并给出了天平分析计算、静态校准和试验测量结果。
Tiny torque test is a very important wind tunnel test. Compared with the conventional force test, the rolling moment load of the micro-rolling torque force test is small, the value is below 0.5N · m, while the rolling moment load and the other aerodynamic load values are quite different. The strain balance measurement Trace rolling torque, it is difficult to achieve six-component balance structure design. In response to this problem, we carried out a six-component micro-rolling torque balance research work, by optimizing the balance structure, based on the existing technical means proposed composite six-component balance structure design solutions, not only to achieve a six-component micro-roll Torque torque balance structure design, and the measurement error of rolling torque coefficient mx0 Δmx0 <1.1 × 10-6. In this paper, the key technologies and main technical measures of the composite six-component micro-rolling torque balance are introduced. The balance analysis and calculation, static calibration and experimental measurement results are given.