The Correctional Deflection Automatic Control System Of Crane

Crane is the necessary equipment in most industrial and mining enterprises in the modern world. But most bridge cranes often run off the rail track. Off-tracking of crane might result in wear of crane rail wheels. As the wheel slide against the track, the contact is anything but smooth. Friction appears when the wheel and the track rub against each other. Friction may make the wheels wear out quickly, become thinner and thinner, and shatter finally. This may make it dangerous to run the crane. And more money will be spent on the maintenance. So it is very important to analyze the reasons of off-tracking and to prevent and eliminate off-tracking.The error of the frame and the track which make the crane not in parallel with the rail track is the cause of off-tracking. Reducing the error is the often used method of reducing off-tracking. For a long time in order to settling the gnaw rail problem a great many endeavors and attempts having been done by people, but the effect is limited.The writer think out a completely new way to settling the gnaw rail problem.The way can keep the wheel running along the rail central line.From the new point of view putting forward using frequency control to correct errors of cranes. Frequncy control is a possible way to deal with grawing of cranes. Frequency control changes the traditional passive correcting errors into activecorrecting errors. It can be said to be a completely new try of correcting errors on crane. In the control system, the writer choose the PID controller which is used in industrial cantrol commonly. I created a Gradual-Golden Section to setting PID controller'three patameters. This method does not require precise mathematical model, do not need to transfer functions, does not require expertise, is simple, not computation, and yet the accuracy of the results.The trait of the control system is that the theory of correcting is novel; the equipments are not complicated; the price is cheap; the system runs stably;it's very easy to operate. 89C52 chip is used on this system.This chip can be used over 1000 times on programming.It's very easy to update in the future. Weak current is used to control strong electricity on industrial control. It is a good and a successful exploration in the field of the crane operating organization.