基于嵌入式控制系统的采样滤波优化算法  

Optimization Methods of Signal Sampling and Digital Filtering Based on Embedded Control System

作　　者：张超 谢战洪[1] 毛学宇 ZHANG Chao;XIE Zhanhong;MAO Xueyu(th research institute of china shipbuilding indastry corporation,Zhengzhou,Henan Province,450015 China)

机构地区：[1]中国船舶重工集团公司第七一三研究所,河南郑州450015

出　　处：《科技创新导报》2021年第4期115-123,共9页Science and Technology Innovation Herald

摘　　要：针对嵌入式控制系统信号采样精度问题进行分析,提出了通过软件进行数字滤波,从而解决大范围电流传感器在小电流采样工况下精度不足的问题。并根据算法原理和内存结构做了算法优化,一共提出了三种滤波算法。通过引入新静态变量的方式,极大地提升了算法的运算速度,进而减小了滤波算法在采样和运算周期中占用的时间,为提高控制器的控制频率提供了可能。本文从问题分析入手,分析算法原理和优化方向,同时对三个算法进行了横向比较,罗列优缺点。同时通过DSP作为主控芯片,验证了三种滤波算法的可行性和运算周期。Focused on the signal sampling accuracy of embedded control system,a digital filtering method is proposed to deal with insuff icient accuracy of little current sample based on large-range current sensor.And the method is optimized through algorithm principle and memory structure of chip,in all,three methods are proposed.By introducing extra static variables,the calculation speed is greatly improved,and the calculation cycles of filtering algorithm on sampling period are reduced,which makes it possible to improve the control frequency of the whole system.From problem analysis,the paper analyzes the algorithm principle and optimization method.Besides,the three f iltering method are compared with merits and demerits.Based on DSP as the control chip,the feasibility of the three methods are verif ied and the operation cycle is tested.

关 键 词：数字滤波 信号采样 嵌入式控制系统 算法优化 时间复杂度 移位寄存器 空间复杂度 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]