Design And Study On Hydraulic Mass Flow Gauge Control System Of The Cold Strip Rolling Mill

The accuracy of the strip gauge is one of the quality targets of stripproduction. With the development of rolling and control theory and itsapplication, it has been improved greatly. But there are still many questions toresolve in practice. This article's based on 1270mm strip rolling technologyreform of Hengtong precision sheet metal company at TangShan. Aftermechanism theory of control system is analyzed detailedly, the authoremphasizes to study the main control method of the hydraulic mass flow AGCsystem and some key questions in realization, which has important practicalvalue and theory significance.Based on original design thought, mass flow AGC system's collectivitydesign scheme is put forward. Firstly, the author stresses on discussing theworking principle and realization ways of main composing part of the controlsystem, moreover introducing every fuction of the soft and hard devices. In thenext place, the author deduces the maths model of hydraulic cylinder positionclose-loop,on the base of which reason out dynamic maths model of mass flowAGC system.Aim to the characteristic of the examination lag for the system, the authorbrings forward the mass flow control method. Firstly, the mass flow impendedequation is established. The realization method is single integral control. Inorder to impend the deviation because of mass flow counter, the author give thenew structure based the gauge meter closed loop. Secondly, it gives thealterable-parameter adaptive control method. Then it is considered thatmeasure velocity accuracy and cost in production ,the author puts forward theway of using photoelectric encoder with high frequency clock for measuringvelocity and simulates the possible deviation to the out gauge. Finally but notthe least, the article contrast the general AGC system and the mass flow AGCsystem on the condition of disturb by matlab.