先进飞机汇流条控制器研究

【作者】 彭卫东；

【导师】 姬劳；

【作者基本信息】 西北工业大学 ， 电力电子与电力传动， 2003， 硕士

【摘要】 本论文在深入研究先进飞机电气系统结构及其功能后，确定采用高可靠性的CAN总线组成分层式总线结构的集散式控制系统。在该系统结构下，对汇流条控制器进行了方案设计，将其划分为六个功能模块：ERT(电气远程终端)模块、模拟量输入模块、数字量输入模块、数字量输出模块、通信模块和电源模块。 论文详细介绍了汇流条控制器各模块的硬件设计与实现。ERT模块选用TI公司的DSP芯片TMS320LF2407作核心处理器，模拟量经过调理电路后由TMS320LF2407自带的模／数转换器进行转换和处理。由于数字量的路数较多，因此采用了FPGA进行扩展和简单处理，数字量输入通过光电隔离后送给FPGA进行软件滤波，其结果由TMS320LF2407定时读取；TMS320LF2407输出的数字量先送给FPGA，再由FPGA经过光电隔离和功率驱动后去控制机电式功率控制器。通信模块利用TMS320LF2407内部自带的CAN控制器，再外接CAN驱动芯片PCA82C250和高速光耦6N137构成。 应用程序开发以嵌入式实时操作系统μC／OS-Ⅱ作平台，采用C语言与汇编语言的混合编程方式进行设计，提高了系统的稳定性、可靠性和实时性。软件设计主要包括以下功能模块：接收总线数据、控制EMPC、监控电力汇流条、传送汇流条控制器状态等。 本文还对汇流条控制器的模拟量输入通道、数字量输入通道、数字量输出通道进行了自检测设计，包括硬件BIT设计和软件实现方法。 所设计的汇流条控制器功能完善、性能稳定，并实现了与电源系统处理机的联调，达到了预期的设计目的。更多还原

【Abstract】 Based on the research of Advanced Aircraft Electrical System’s architecture and function, the electrical system employs Controller Area Network (CAN) bus to construct a Distributed Control System (DCS). Grounded on the system structure, Bus Controller (BC) design includes six modules: Electrical Remote Terminal (ERT), analog input, digital input, digital output, bus communication and power supply module.The detailed design of each module is discussed in this dissertation. TI’s TMS320LF2407 is selected as core processor in ERT, and analog signal is converted by TMS320LF2407’s internal ADC. Digital inputs are processed by FPGA after being isolated by photocouplers. The results of digital inputs saved in FPGA are read by TMS320LF2407 periodically. The digital outputs being written to FPGA are used to control EMPCs after being isolated by photocouplers and driven by Darlington transistors. The communication module comprises of CAN driver, photocoupler and TMS320LF2407’s internal CAN controller.The software design is based on uC/OS-II, a robust and reliable embedded Real-Time Operation System. The application software is developed by C and assembly languages. The software includes the following function modules: bus data receive, EMPC control, electrical bus monitor, status data transmission and so on.The built-in test (BIT) design of hardware and software is also introduced in this dissertation. The BIT design consists of analog inputs, digital inputs and digital outputs.The designed Bus Controller performs perfectly in the phase of system test. Especailly, the communication between BC and PSP (Power System Processor) is very successful.更多还原