【作者】 王勤鹏；

【导师】 李鹤鸣； 汤旭晶；

【作者基本信息】 武汉理工大学 ， 轮机工程， 2009， 硕士

【摘要】 随着世界范围内能源危机及环境污染的日趋严重,人们对柴油机节能和排放的要求也日趋严格,对其调节控制提出高精度及多参数的要求。智能化技术是大功率低速船舶柴油机的发展方向,测控系统是开展智能化柴油机研究的重要平台。在深入分析Wartsila智能化柴油机结构和工作原理的基础上,研制了智能化柴油机测控系统。(1)测控系统技术方案的总体设计:保留原机关键结构和部件作为测控系统的实体执行结构;部署在Compact控制器上的燃油喷射控制仿真模型和排气阀控制仿真模型,与实体执行机构组成智能化柴油机硬件在环仿真系统,较真实地模拟出柴油机负载特性;利用NI PXI和研华工控机硬件载体及LabVIEW软件开发环境,实现测控系统监测报警功能。(2)智能化柴油机硬件在环仿真系统的建立:通过I/O硬件采集柴油机执行机构信号,利用DMA方式将采集的数据送至Compact控制器,作为模型的输入条件;经仿真模型计算,输出排气阀升程模拟信号等。完成排气阀控制仿真模型的设计和程序开发,并运用“缸平移”法提高了仿真模型精度及实时性。(3 SSI HUB的设计和曲轴转角信号的解码:依据SSI标准以MAX485芯片为主体搭建SSI HUB硬件电路,从SSI总线上测取曲轴转角信号;并在FPGA中编写曲轴转角信号解码程序,得到实时曲轴转角角度值。(4)利用CAN总线实现Compact控制器与PXI间的数据交换,并实现监测软件自检功能,以检查各物理设备通讯是否正常。(5)测控系统报警板的软硬件开发:以AT-S52单片机为中心设计RS-232通讯和继电器驱动外围电路,并开发单片机与工控机串口通讯程序。更多还原

【Abstract】 As the worldwide energy crisis and environmental pollution become the biggest concerns for us nowadays,the higher standards for fuel efficiency and emission seem more important.Accordingly it requires the higher precision and the more parameter of the control of diesel engine.The development direction of heavy duty low-speed diesel engine is application of technology,and monitoring control system is the important platform of the research for the intelligent diesel engine.Based on the in-depth analysis of structure and working principle of Wartsila intelligent diesel engine,the monitoring control system of intelligent diesel engine is designed.(1) The whole design of the monitoring control system:Executing agency of the measurement control system is composed of the key component and structure of original machine;The Hardware-in-the-loop(HIL) simulation system is made up of executing agency,fuel injection simulation module and exhaust driving simulation module deployed in the Compact controllers,which simulates load characteristics of diesel engine;Using hardware of NI PXI and Advantech Industrial Computer,and software development environment of LabVIEW,the monitoring and alarming functions.is realization realized.(2) HIL system for intelligent diesel engine:The signals from executing agency are acquired via I/O hardware and then transferred to the Compact controller by DMA as input-signals for simulation module.After calculation by simulation module,analog signal such as the trend with exhaust valve opening or closing strokes can be produced as output.The design and development of exhaust driving simulation module is completed.The accuracy and real-time capability of the simulation model are improved by the method of "cylinder moving".(3) The design of SSI HUB and the decoding of crank angle signal:Based on the SSI criteria the hardware circuit of SSI HUB is structured taking the MAX 485 chip as main part,then crank angle signals are acquired from SSI bus.The real-time crank angle is measured throughout the decoding program in the FPGA. (4) The data exchange between the Compact controller and PXI is implemented by the CAN bus.Self-testing of system is achieved,which check the communications of the physical device.(5) Hardware and software development of the alarm board:Regarding the AT-S52 single-chip as the central the RS-232 communication and relay driver external circuit are designed.And the serial communication program between single-chip and IPC is developed.更多还原