Study And Design Of The Controlled System Of Moving Mechanism Of Overhead Crane Based On Lpc2220 And Vxworks

The overhead hoist crane is widely used hoisting equipments in the factories and mines, the warehouse and so on department. The request to hoist crane is also getting higher and higher, along with rapid development of the modern science and technology, the expansion of the industrial production and the enhancement of automaticity, the multiplicity of the industrial production way and the need of user. In order to improve the efficiency of production and transportion, reduce the operation intensity, a simply operated servo system of position of reliable performance is designed for the hoist crane's running gear in the article. The system uses the LPC2220 controller as the core hardware system, takes VxWorks as the core software system, use frequency changer as power conversion module, and take cage mouse type asynchronous motor as power running gear control system.In this article, first, the cage mouse type asynchronous motor is equivalent to the direct current motor through the vector transformation, two each other independent stator voltage subsystem has been realized using the voltage vector decoupling principle, and the similar control characteristic of direct current machine has been obtained. Then, the postion ring regulator and the speed ring regulator are designed using the PID principle, to realize double closed-loop control of the control system. Meanwhile, control system is simulated using the Matlab software , and the control effect is confirmed. Moreover, owe to driving system's characteristic in view of the bridge-type hoist crane, to obtain the better control effect, the speed control curve and the improvement PID control is used in the actual system's position regulator.In addition, embedded single integrated circuit LPC2220 and embedded operating system VxWorks are also detailedly introduced in this article, and the hardware circuit and the software program is designed by using the LPC2220 hardware source and the VxWorks software platform fully, the main hardware schematic diagram and the software flow chart is given in this article.