基于PLC控制的航油供应控制系统毕业设计（论文）.doc

PLC控制的航油供应控制系统 摘要 中国民用航空事业的飞速发展给航空供油工作提出了更高的技术要求。飞机供油与汽车加油大不相同,它要求供油压力稳定、流速适中；特别是采用长距离管线输送油品和新机型的大量引进,要求航空供油必须适应更多不同的情况。如何满足飞机油箱口压力条件,做到平稳、快捷、安全,如何做到起泵迅速停泵准确,如何更好的避免水击(在压力管路中，当流速由于某种原因发生了突然变化，因而引起管路中的压力也发生突然变化，这种现象称为水击，水击严重时可引起管路爆裂), 如何做到及时准确、安全平稳地供应航油，尤其是在航油吞吐量大、供油流量变化大的条件下较好地满足这些要求，是本次航油系统的设计必须好好考虑的问题。可编程控制器采用可编程序的存储器，用来在其内部存储执行逻辑运算，顺序控制、定时、计数和算术运算等操作的指令，并通过数字式和模拟式的输入和输出，控制各种类型的机械或生产过程。THE BOAT OIL THAT PLC CONTROL SUPPLIES CONTROL SYSTEM Abstract At full speed development give aviation support oil work and propose high specification requirement civil aviation of China cause, The plane supports the oil and automobile to refuel and differ widely, it requires supporting the pressure of the oil to be steady, The velocity of flow is moderate ; Especially adopt the generous introduction that the pipeline of long distance sent the oil and new model, Require aviation to support the oil to adapt to more different situations. How to satisfy the condition of a pressure of fuel tank of plane, it is stable, swift to accomplish, Safe, how accomplish and get up rapidly, how pump a kind one prevent water from hit, how attain in time accurate, the safety supplies sail oil fair and softly, is in the sail oil to swallow to vomit to have great capacity, provide oil discharge to change particularly under great condition more and so much satisfy these request, This is that boat oil supplies the question that is designed and must be considered systematically. programmable controller used programmable memory, used to implement logic in their internal storage operations, sequence control, timing, counting and arithmetic operations, such as operating instructions, and through digital and analog input and output, the control of various types of machinery or production processes. Utilizing the converter, PID regulator , an one-chip computer, PLC waits for the organic integration of the device, forms the control system, regulate the flow of output of the oil pump, Realize that constant volta