双核DSP28335飞控计算机的抗干扰设计  

Anti-interference design for dual-core flight control computer based on DSP28335

作　　者：罗秋凤[1] 李勇[2] 高振[2] 

机构地区：[1]南京航空航天大学无人机研究院,江苏南京210016 [2]南京航空航天大学自动化学院,江苏南京210016

出　　处：《机电工程》2013年第10期1273-1276,共4页Journal of Mechanical & Electrical Engineering

基　　金：南京航空航天大学基本科研业务专项研究基金资助项目(NP2011006)

摘　　要：针对无人机(UAV)飞控计算机可靠性要求高而机载电磁环境恶劣的特点,提出了一套双TMS320F28335(简称DSP28335)架构飞控计算机的抗干扰设计方案。设计了双核的DSP28335母板,实现了40路I/O、16路A/D、6路PWM舵回路控制、15路串行接口的双MCU飞控计算机功能,简化了外设扩展接口的电路设计,并使CPU降额使用。通过单片的CPLD可编程逻辑芯片实现了全部译码、缓冲功能,并将接口逻辑电路进行了进一步简化。采用过压、欠压、硬件watchdog的设计方法增加了系统失控后自恢复能力;采用引脚滤波窗式的噪声抑制、边界保护技术提高了飞控计算机抗高频信号、超边界信号的干扰能力。通过模拟各类干扰信号验证测试,及整机12 h的拷机试验,其结果表明,抗干扰措施有效,显著提高了飞控计算机在复杂电磁环境下的适应能力。Aiming at reliability of flight control computer in the unmanned aerial vehicle（UAV） adverse electromagnetic environment,dual-core TMS320F28335（DSP28335） structure were designed.The dual-DSP28335 mother board was designed and a powerful flight control computer which had 40 channels（ch） I/O,16ch ADC,6ch PWM/CAP and 15ch serial interfaces was implement,MCU was derated,and the peripheral circuits were simplified.Its logic interface circuits were also simplified by the complex programmable logic device（CPLD） for all decoders and drivers.To increase the system self-recovery,over/under voltage monitor and hardware watchdog methods were proposed.Finally,pin-filter-window noise suppression and boundary protection technique were used to improve further the anti-interference for higher frequency signals and over the limit signals.Jamming signals simulation and 12-hour performance experiments results indicate that the above EMC considerations are valid,and the adaptability of flight control computer in complex electromagnetic environment is remarkably improved.

关 键 词：无人机 双核DSP28335 抗干扰 降额使用 噪声抑制 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]