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根据现代鸭式飞机结构特点及载荷飞行实测要求,提出了在鸭翼大轴外缘选择一个剖面进行测载应变计改装的方法,并采用不同侧应变计以特定方式组成惠斯通电桥,以达到某种应变电桥只对与其对应的载荷敏感,而对其他载荷响应较小的目的,从应变响应上对鸭翼的弯矩、扭矩和剪力载荷进行机械解耦。在载荷校准试验中,左右鸭翼同时对称向上施加校准载荷,利用飞机重量和后机身托架即可平衡加载载荷引起的飞机移动和转动,不需要对飞机进行复杂的约束和固定。通过对校准试验数据的分析,采用多元线性回归方法,建立了鸭翼载荷模型,并对载荷模型进行了验证。选取典型试飞状态,对各种机动情况下鸭翼实测飞行载荷进行了分析研究,给出了鸭翼主要的严重受载状态。
According to the structure characteristics of modern ducks and the actual requirements of the payload flight, a method to modify the load-bearing strain gauge on the outer edge of the major axis of the duck-wing aircraft is proposed and the Wheatstone bridge is constructed by using different strain gauges in a specific way A strain bridge is only mechanically sensitive to its corresponding load, while for other loads, the yaw moment, torque and shear load are mechanically decoupled from the strain response. In the load calibration test, the left and right canard wings simultaneously exert a calibration load upwards symmetrically. The airplane weight and the rear fuselage bracket can be used to balance the movement and rotation of the aircraft caused by the loading load without complicated restraint and fixing of the aircraft. Through the analysis of the calibration test data, the multiple wing regression method was used to establish the canine wing load model, and the load model was verified. Select the typical test flight state, the measured flight load of duck wing under various maneuvering conditions are analyzed and studied, and the main severely loaded state of canard wing is given.