Control And Simulation Of Zero Velocity Meet Paper Machine Tension System

Although the financial crisis has passed for two years, its influence and shadows still exist and the external market demand remains weak.The influence on the traditional manufac- turing industry is the biggest. Though China's overall scale expanding gradually,the profit is not high and increase has dropped substantially under the influence of international financial crisis.GuangDong is famous for light industrial manufacturing and its annual accounts is one forth of all country.In recent years,both JiangSu and ZheJiang province develop rapidly. Competition from home and abroad makes GuangDong face a big challenges in the future.The development of GuangDong,especially light manufacturing,needs technical pull.In order to get gid of financial crisis and maintain light manufacturing advantage,it is necessary to conquer the key technique problem.Aimed at improving printing efficiency and accuracy of printing machine,ShanTou Light Industry Equipment Institute determines the automatic zero velocity meet paper machine as the key technology to upgrade printing industrial.As the requirement of speed and accuracy improve continuously in the printing production,they have adopted kinds of zero velocity meet paper machine which issues with printing parameter default.Because the key problem has not solved,we can not produce this zero velocity meet paper machine matching with international advanced printing machine.Besides, the connection of foreign zero velocity meet paper machine is not open,it is hard to match the printing machine produced in China.So,ShanTou Light Industry Equipment Institute decide technology of producing zero velocity meet paper machine as an important development require.Zero velocity meet paper machine is the main auxiliary equipment in the process of gravure printing,flexo printing and coated compound printing.The main control of zero velocity meet paper machine includes tension control,rectify control and logic control.Performance quality of tension control directly affects the whole function of zero velocity meet paper machine.In meet paper process,tension keeps fluctuations.If tension fluctuates above a fixed value,the paper will snap.So,it has rather important meaning to research tension system.In actual process,the time-varying materials ram,the changing vecolty and unpredictable disturbances and so on usually make tension change continuously.Fuzzy control can deal with such problem as that the model can not easily get and dynamic behaviour is hard to master.Gain scheduling methods is used to deal with time varying sysytem and discrete the parameters so that we can research characteristics of the system in every discret time.Prediction control method can give controller the factor that infulence the steadbility of system head of time.So the controller can deal with the factor in advance to reduce the bad influence.This paper firstly theoretically analysises the tension system of zero velocity meet paper equipment.Based on theoretical analysis,it establishes a model.Based on this model,it uses both fuzzy control and gain scheduling methods to deal with the time-varying radius.And then,it use matlab to simulate the model.Another research methods is Smith estimated correction method.By changing transfer function and add compensation,it controls system better.