基于L1趋势滤波的飞控传感器降噪方法  

A De-noising Method for Flight Control Sensors via L1 Trend Filter

作　　者：唐强[1] 雷志荣 史龙[1] TANG Qiang;LEI Zhi-rong;SHI Long(Science and Technology on Aircraft Control Laboratory,AVIC XI AN Flight Automatic Control Research Institute,Xi an 710076,China)

机构地区：[1]航空工业西安飞行自动控制研究所飞行器控制一体化技术国家重点实验室

出　　处：《导航定位与授时》2020年第1期55-59,共5页Navigation Positioning and Timing

基　　金：装备预研中航工业联合基金(61411305061002)

摘　　要：针对飞行控制传感器中普遍存在的噪声信号,提出了一种基于L1趋势滤波技术的在线降噪方法。首先简要介绍了L1趋势滤波技术,引入了滑动窗口对算法进行改进以满足实时在线应用需求。以气压计所采集的信号为例,采用原始飞参数据,利用该方法进行降噪处理,并与文献中常用的小波降噪方法进行初步比较,基于Matlab的仿真结果验证了该方法的可行性。The outputs of flight control sensors usually contain a variety of noise. To improve the signal quality and reduce the noise, a real-time de-noising method using L1 trend filter is presented in this paper. Firstly, the theory of L1 trend filter is briefly introduced, and a modification algorithm based on moving window is proposed to meet the requirement of online signal process. Then, the barometer data obtained from a real flight is de-noised using the proposed method. Finally, compared with the wavelet based de-nosing method, simulation results based on Matlab verify the feasibility of this method.

关 键 词：飞控传感器 信号降噪 L1趋势滤波 小波降噪 

分 类 号：V249[航空宇航科学与技术—飞行器设计]