基于STM32的飞机电气负载管理中心设计

Design of Aircraft Electric Load Management Center Based on STM32

摘要:

传统飞机远程配电系统使用采样电阻对模拟电参数进行采集,硬件电路繁琐,实时性、可靠性和采样效率在实用中很难满足系统要求；针对这种情况,设计一种基于STM32的飞机电气负载管理中心方案,采用RN8209计量芯片替代传统的采样电阻,设计模拟量采集模块电路,通过MODBUS协议与控制内核通信,完成汇流条以及负载电压、电流的采集；以μC/OS-II实时嵌入式操作系统为软件平台,给出了电气负载管理中心的整体框图,硬件接口电路和系统程序设计；实验结果表明,电气负载管理中心实时性得到有效提高,采样精度得以保留；该方案有效地简化了硬件电路,获得满意的采样效率,同时系统的可靠性增强。

Abstract:

Aircraft remote power distribution system have been using sampling resistance to collect the analog electrical parameters, the hardware circuit is complicated, real-time performance, reliability, and efficiency of sampling would be impractical to meet system requirements. In response to this situation, an Electric Load Management Center (ELMC) which takes STM32 as the control unit, and with μC/OS-II real time embedded operating system as the software platform is presented. RN8209 metering chip is used instead of the traditional sampling resistor. Design the analog acquisition module, and communicate with the control unit through MODBUS protocol. The system block diagram, hardware circuit design and system program design are provided. Experimental results show that real-time of the system is effectively improved, and the sampling precision is preserved. This design can effectively simplify the hardware circuit and achieves satisfied sampling efficiency as well. At the same time, the reliability of the system is enhanced. 