基于均值的副翼作动筒载荷事件划分方法

副翼是民用飞机重要操纵面之一,主要功用是产生飞机滚转力矩,用于改变飞机的航向。 现代中大型飞机的操纵系统大都采用伺服作动器-操纵面装置,当操纵面受到铰链力矩时作动器也相应受载。 以民用飞机副翼作动筒为研究对象,基于试飞实测数据与主操纵面作动筒载荷计算模型,提出了一种基于均值的作动筒载荷事件划分方法。 结果表明,该事件划分方法效果理想,较好地反映出了不同飞行事件之间载荷均值的差异。 通过对 14 000 次飞行作动筒载荷历程进行雨流处理,给出了相应的载荷谱及载荷幅值、均值分布直方图,总结出相关分布规律。 该疲劳载荷谱及相应的分布规律对工程实践中的寿命计算具有重要意义。

A method of dividing load events of aileron actuator cylinder based on mean value

Aileron is one of the important control surfaces of civil aircraft. Its main function is to generate aircraft roll moment and change the course of aircraft. The control system of modern medium and large aircraft mostly adopts servo actuator-control surface device. When the control surface is subjected to hinge torque, the actuator is also loaded accordingly. Taking the aileron actuator of civil aircraft as the research object, based on the test flight data and the load calculation model of the actuator on the main control surface, a method for dividing actuator load events based on mean value was proposed. The results show that the event partition method is effective and reflects the difference of load mean between different flight events. Through rain flow treatment on the load history of 14 000 flight actuators, the corresponding load spectrum, load amplitude and mean distribution histogram were given, and the relevant distribution rules were summarized. The fatigue load spectrum and its corresponding distribution law are of great significance to the life calculation in engineering practice.