Anti-Sway Control System Of 240t Bridge Crane In Steel-Making Factory

Crane is one of the frequently used carrying equipment. Its m ass use is in the metallurgy, architecture, manufacturing and port transportation. Crane's horizontal motion is the main reason to rise the load sway. The existence of load sway suppressed the crab's horizontal motion speed, prolonged the crane assistant operation time, reduced the load halting precision, resulted in a large periodical load to the crane, thence the crane work efficiency is lowed. It is more distinctly in the application of good-sized and medium-sized high-speeded cranes. To suppress the load sway is of great benefit to enhance the working efficiency. And it is very important to the progress of our country's lifting appliances。This paper introduces the characteristic and timing need of drive system of 240t bridge crane. It compares the point of AC stator conversion and AC frequency conversion. It also analyses the makeup and moving course of main travel drive.In study of packing accurately, the status quo of research about anti-sway control of bridge crane is expatiated in this thesis. On the base of analyzing the physical model of bridge crane, a nonlinear mathematical model of its two dimension movement is setup ,and construct a nonlinear SIMULINK model based mathematical the model, which offers a foundation for the further controller design。With the conclusion, it uses servo control system and expert system to actualize anti-sway control. Servo control system makes the angle of tight wire as variable to adjusts speed of main travel. It can keep the angle least to actualize anti-sway control. Anti-sway expert system simulates the course of operation with PLC. It substitutes the space of work with time delay model. As the distance always was same in traveling, it can combine the anti-sway control with orientation of main travel.The precision of control with servo control system is better than expert system, but more adjustment reduce the efficiency of working, and the expense of alteration is more costly. Anti-sway expert system apply simply, programs easily and services on the cheap, and it extends large-scale.In this thesis, based on the anti-sway control system of main hook in 240t bridge crane, it also designs wireless watch and control system. The system connects computer with PLC through wireless transmission module. It can show the real time position of bridge crane to produce control center, and watch the instance of movement.