Research Of Flying-shear Control System Based On Derivative Negative Feedback And Grid Voltage Feedforward Control

Flying shear control system need to have high performance and is complex, andit’s cutting precision is very high. The control process includes field testingcomponents, man-machine interface, PLC programming, and many other respect.Being familiar with the basic components and control theory of the flying shearcontrol system is particularly important for maintenance and quickly finding anddealing with failure. Flying shear normal running play an irreplaceable role inreducing the production equipment accidents and increasing productivity. Thereforethe study of flying shear control system is of great significance.For the present situation of the steel rolling industry, a flying shear control system has been designed with the shearing process in-depth analysis and study: the core of the system is the PLC, computer control system. Draw on the computer control technology, control theory research results, and the application of the Siemens advanced products as6RA70and process control panels T400. Greatly improve the accuracy of the control system, and improve product quality and production efficiency.This article focused on the precision of the flying-shear process requirements.On the basis of the traditional DC double-loop speed control system, add the differential negative feedback and feedforward controller which based on the voltage fluctuations. The given slope and the changing slope of the two graphical methods are usedto calculate the flying shear start-up time, Study the positioning problem thenthe control method is given; Join Siemens products, such as the T400and DC speede6RA70in this control scheme.