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载荷模型在使用应变计法的飞行载荷实测中占有重要地位,基于地面静态校准数据和空中动态飞行数据,建立一种动态的载荷模型,并提出一种剔除强影响应变计的相对准则,形成一种改进的动态模型建立方法。通过和传统动态建模方法的比较验证了改进方法的正确性,在地面检验工况中发现改进方法比传统的动态建模方法精度高。最后将之应用于某型机翼根部的飞行载荷实测,结果发现:和传统静态建模方法比较,弯矩差5%,剪力差3%,由于该方法更代表空中实际飞行状况,其结果可能更可靠。
The load model plays an important role in the flight load measurement using the strain gauge method. Based on the static calibration data of the ground and the flight data of the air, a dynamic load model is established and a relative criterion for eliminating the strong influence strain gauge is proposed to form a Improved dynamic model building method. Compared with the traditional dynamic modeling method, the correctness of the improved method is verified. In the ground inspection condition, the improved method is more accurate than the traditional dynamic modeling method. Finally, it is applied to the flight load measurement of a certain type of wing root. The results show that compared with the traditional static modeling method, the bending moment is 5% and the shear force difference is 3%. Since this method represents the actual flight condition in the air more, May be more reliable.