基于MPC5554的飞机二次配电设备多路采样的设计  

Design of Multi-channel Sampling in Aircraft Secondary Power Distribution Assembly Based on MPC5554

作　　者：赵桂铭[1] 张晓斌[1] 郑先成[1] 

机构地区：[1]西北工业大学自动化学院,西安710072

出　　处：《机电一体化》2011年第8期75-78,82,共5页Mechatronics

摘　　要：分析了以32位PowerPC微控制器MPC5554为核心的飞机二次配电设备的结构和功能,介绍了MPC5554中eQADC(增强型序列模数转换)模块的工作机制。针对MPC5554进行多路模拟信号采样数据存取量大的问题,提出了一种由eDMA辅助完成多路采样的方法,并以嵌入式操作系统μC/OS-Ⅱ为平台对多路采样实时任务进行了设计。飞机地面电网试验表明,该系统运行稳定可靠,能够实时准确采集多路信号,并显著提高了主CPU的效率。The structure and functions of the aircraft secondary power distribution assembly （SPDA） which is based on 32 bit PowerPC micro-controller MPC5554 are analyzed and the operation mechanism of eQADC is introduced in detail. Since data transfer is quite a heave burden when multi-channel analog signal sampling is realized in MPC5554, a method with the assistance of eDMA to complete multi-channel signal sampling is discussed and the realtime task in μC/OS-Ⅱis designed. The ground experiment result of aircraft grid indicates that the system can run stably and reliably, multi-channel analog signals can be sampled in real time and accurately, and the efficiency of the host CPU is remarkably increased.

关 键 词：MPC5554 多路采样 DMA μC/OS-11 SPDA 

分 类 号：V242[航空宇航科学与技术—飞行器设计]