摘要
传感器在线数据的准确快速处理是确保数字孪生可靠性和时效性的主要手段之一,特别对于描述运动状态的数字孪生,其重要性不言而喻。本研究面向飞机机翼数字孪生体构建的准确性和时效性,提出基于在线加速度积分的位移快速获取方法。首先,利用Netwon-Cotes插值对加速度信号进行动态积分,得到对应的速度,并采用指数加权移动平均(Exponentially weighted moving average,EWMA)对积分的速度进行“点到点”的实时去噪,确保计算的准确性和时效性。其次,对去噪后的速度进行快速积分获取对应的位移。同时,为了进一步减少位移中噪声的影响,构建动态滑动窗,采用高通滤波(High-pass filter,HPF)对积分后的位移进行快速去噪,实时获取最终位移。然后,通过构建不同含噪量和不同类型的加速度测试函数验证提出方法对噪声和积分信号复杂度的鲁棒性。最后,采用提出的方法构建飞机机翼数字孪生,通过对物理空间实测加速度进行实时积分与动态去噪获取对应的位移,并利用该位移在线驱动机翼数字孪生体动作,实现孪生机翼对实体机翼运动姿态的同步镜像。同时,本研究为在线信号的快速处理提供借鉴和参考。
The accurate and rapid processing of the online signal from sensors is one of the main means to ensure the reliability and timeliness of digital twins,especially for the digital twin of motion state description,its importance is evident.Aiming at online fast processing of real-time monitoring signal for digital twin of aircraft wing,a real-time displacement acquisition method based on online acceleration integration is proposed in this study.Firstly,the acceleration signal is dynamically integrated by Newton-Cotes interpolation to obtain the corresponding velocity.The exponentially weighted moving average(EWMA)is used to“point-to-point”denoise the velocity in real-time,so as to ensure accuracy and timeliness of integration and filter.Subsequently,the velocity after denoising is quickly integrated to acquire the corresponding displacement.At the same time,to further reduce the noise in displacement,a dynamic sliding window is constructed and a high-pass filter(HPF)is employed to quickly denoise the integrated displacement and obtain the final displacement in real-time.Then,the robustness of the proposed method to noise and signal complexity is verified by constructing different signal-noise ratios(SNR)and different types of acceleration test functions.Finally,the proposed method above is employed to construct the digital twin of an aircraft wing.The corresponding displacement is obtained by real-time integration and dynamic denoising of the measured acceleration in physical space,and the displacement is used to online drive the action of the digital twin,so as to realize the synchronous mirror of action and attitude from the physical wing to the digital wing.This study also provides a reference for the rapid processing of online signals.
作者
杨亮亮
来孝楠
何西旺
李鹏
郭正刚
宋学官
YANG Liangliang;LAI Xiaonan;HE Xiwang;LI Peng;GUO Zhenggang;SONG Xueguan(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2024年第2期342-355,共14页
Journal of Mechanical Engineering
基金
国家自然科学基金(52075068)
国家重点研发计划(2018YFB1700704)资助项目。
关键词
在线积分
数字孪生
加速度
位移
飞机机翼
online integration
digital twin
acceleration
displacement
aircraft wing
