某工程襟缝翼运动机构疲劳试验采用大后退量、三段式（前襟、主襟、后襟）富勒襟翼结构，翼面运动为平动和转动的空间复合运动形式，具有多段重叠面积大、偏转速率变化大、剖面轨迹差异大等特点，使翼面运动过程中始终垂直于翼面的交变载荷同步精准施加面临巨大挑战。因此，首次研发了一套空间复杂运动增升结构随动加载系统，包括翼面偏转、随动机构及协调加载等多套控制系统，涉及角度、位移、载荷、速度等多个控制参量，通过多系统多参量耦合同步控制技术，实现了翼面偏转自主控制及翼面交变载荷精准施加，保证了翼面加载点作动筒方向、载荷、翼面偏转角度实时协调同步，确保了翼面偏转全过程随动加载。测试结果显示：翼面运动过程载荷动态误差小于3%，此随动加载系统是可行、有效的。
The fatigue test of the flap and slat movement mechanism of a project adopts a large-retreat three-segment (front flap, main flap, and rear flap) Fowler flap structure. The wing surface movement, as the spatial composite movement consisting of translation and rotation, are characterized by multiple overlapping areas, large changes in deflection rate, and large differences in profile trajectories, making it difficult to simultaneously and accurately apply alternating loads that are always perpendicular to the airfoil during the movement of the airfoil. In this paper, a set of follow-up loading system for the lift structure with spatial complex movement is developed for the first time, including multiple control systems for wing surface deflection, follow-up mechanism and coordinated loading, involving multiple control parameters such as angle, displacement, load, speed, etc. The multi-system and multi-parameter coupling synchronous control technology is used to achieve autonomous control of wing surface deflection and precise application of wing surface alternating loads, ensuring real-time coordination and synchronization of the direction, load, and deflection angle of the actuator cylinder at the loading point of the wing surface. Follow-up loading is thus achieved in the entire process of wing surface deflection. The test results show that the dynamic error of the load during the movement of the airfoil is less than 3%, and the follow-up loading system is feasible and effective.
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