机械毕业设计(论文)-基于单片机的电液比例控制系统设计-C8051F040(含全套图纸).doc

基于单片机的电液比例控制系统设计 摘 要：随着微电子技术、智能技术、传感与检测技术等的快速发展以及向工程机械领域的不断渗透，现代工程机械正处于机电液一体化的崭新的发展时代。其中，电液比例控制系统具有控制精度高、安装使用灵活以及抗污染能力强等多方面优点应用领域日益拓宽C8051F040微控制器为核心的系统的硬件结构。接着，详细阐述了控制器与电液比例阀的接口电路，即由电机驱动芯片LMD18200构成的驱动电路的原理与设计。最后，本文讨论了整个系统软件部分的设计情况。 关键词：电液比例控制，C8051F,LMD18200,PID Based on SCM electrohydraulic proportional control system design Student:Liu Xin Tutor:Cai Peizhong (Oriental Science Technology College of Hunan Agricultural University, Changsha 410128, China) Abstract:With the rapid development of micro-electronics, intellectual technology, sensing and detection technology and the continuous penetration of them into the field of engineering mechanisms, modern engineering mechanism is in a new age of the integration of mechanism, electrics and hydraulic pressure. Electro-hydraulic proportional control system has a lot of advantages，such as the high control accuracy, the flexible installation and use, the strong resistance on contamination and so on ,so that the application of electro-hydraulic proportional control system has increasingly broadened. The Electro-Hydraulic proportional control system that based on C8051F040 controller in this paper has higher stability and dependability and real-time responsive capacity, compared to that based on traditional singlechips. Therefore, it can adapt to the application environment of the modern engineering mechanism better than other control systems in our country.Firstly, it is described the development history, basic principle and the classification of the Electro-hydraulic proportional control system in this paper.Secondly, this paper introduces the function of the whole control system and the basic hardware structure which is based on the C8051F040 controller in detail.Then, this paper elaborates the principle and the design process of the driver of the electro-hydraulic proportional control system which is consisted of the motor-driven chip LMD18200.At the last of this paper, it discusses the design of the program of