基于∑-Δ调制原理的高精度旋变旋转变量解码系统  

∑-Δ Modulation Based High Precision Rotary Variable Decoding System

作　　者：李超[1] 杨益群[1] 郝旭耀 赵怀林[1] 

机构地区：[1]上海应用技术学院电气与电子工程学院,上海200235

出　　处：《自动化仪表》2016年第3期17-22,共6页Process Automation Instrumentation

基　　金：国家自然科学基金资助项目(编号:61104082)

摘　　要：为了满足无人机中风标式迎角侧滑角传感器对旋转变量测量精度高、稳定性好、反应速度快的要求,提出了一种基于∑-Δ调制技术的旋转变压器解调方案。分析了∑-Δ调制技术用于旋变解调的实现原理,以DSP为主控制器,介绍了采用∑-Δ模拟数字转换过采样结合Sinc3数字抽取滤波的旋变解码系统应用方法。实验证明,所设计的旋变解码系统具有较好的静态特性和动态稳定性,并达到了大气数据计算机中风标式迎角和侧滑角测量的性能要求。To achieve the characteristics of high precision,good stability and fast responding with the attacking angle and side slipping angle vane sensor measuring the rotary variables in the unmanned aerial vehicle,a rotary transformer demodulation scheme based on the ∑-Δmodulation technology is designed. The paper analyzes the technical principle of applying the ∑-Δ modulation technology to the rotary variable demodulation. It introduces the designed rotary variable decoding system with the master controller DSP,which combines over sampling by ∑-Δ analog-digital conversion and Sinc3 digital extraction filtering. The experiments show that the rotary variable decoding system has both better static characteristics and better dynamic stability and the performance requirements for the measurement of both the attacking angle and the side slipping angle in the air data computer are satisfied.

关 键 词：无人机 旋转变压器 旋变解调 调制技术 DSP控制器 数字抽样滤波 

分 类 号：TH3[机械工程—机械制造及自动化] TP27[自动化与计算机技术—检测技术与自动化装置]