基于plc电液伺服控制系统设计.doc

摘 要 电液伺服系统融合了电气和电液两个方面的优点。具体来说有对系统反应很敏捷，很强大的精准控制，再输出端的功数值相当高、在处理系统送来的相应相当快，非常善于反馈各种参数控制量。在综合了上述的优点后它在对需求速度核装载量大的对象时候更能发挥他的特长。在各种形式的恶劣环境中均有着不同的应用。比如说在军事上的应用、航空航天上的应用，钢铁电力行业的应用，制造加工业的应用、各种飞机车里的模拟台的控制、电炉冶炼的电极位置的控制以及各种实验机的压力的控制。 机械手运动伺服系统是隶属于电液控制系统的一类，他将小液压功率转换为大功率的液压信号，早些年代的机械手伺服系统是一起执行所有的命令，这样对机器的性能往往会有所限制，因为PLC是周期性循环扫描方式，每一瞬间就只能专心做一件事，同时使得运算速度特别快，让他与外部电器动作几乎同步，实现控制上的要求。 西门子S7-200具有模块化的结构，容易实现分布式的配置，同时具有很高电磁兼容特点，因此被广泛的应用。本次设计采用S7-200 PLC，选用紫金桥软件作为上位机，实现对电液伺服控制系统的模拟。 关键词 电液伺服系统，机械手，S7-200，紫金桥 Abstact Electro hydraulic servo system integrated the advantages of the two aspects of electrical and electro hydraulic, with high control precision, fast response, large output power, signal processing flexibility, easy to achieve the feedback of various parameters, etc.. Therefore, in the load quality and response speed of occasions the most suitable for, its application has been throughout all areas of the national economy, such as control the position of the aircraft and ship steering control, radar and gun control, machine tool industry and trade and Taiwan, strip of rolling mill thickness control, electric furnace electrode position control, aircraft of various vehicles in the simulation table control, the generator speed control, material testing machine and other experimental machine pressure control. Belonging to the motion of the manipulator servo system of electro-hydraulic control system, he will be small power conversion for high power hydraulic signal and previous manipulator servo system is to execute all orders together, so on the machines performance will limit, PLC cycle scanning mode, each moment concentrate on doing one thing, while the calculation speed is very fast, makes him almost simultaneous with the action of external appliances, achieve control requirements. SIEMENS S7-200 modular structure, easy to implement distributed configuration and cost-effective, strong electromagnetic compatibility characteristics, is widely used. The S7-200 is