Desenvolvimento de um controle de histerese adaptativo aplicado a uma malha de vazão

Abstract

In this work, we propose a study of adaptive method outflow in the valve from one Didactic Industrial Plant, using hysteresis compensation. The plant consists of two industrial processes: a fluid heating system and a fluid mixing system, being the latter considered in the work. The objective of this work is to simulate and control the operation of the process control valve, and apply compensation in order to reduce the outflow oscillations. The processes are controlled and instrumented by equipment for industrial use based on Profibus communication protocol. The work uses a data acquisition interface based on the communication protocol OPC (OLE - Object Linking and Embedding for Process Control), available on the control supervisory system of the Plant, through the toolbox of the software Matlab. From the data acquired using this tool, a hysteresis curve is generated and then the outflow compensation is implemented within different percentage ranges. The compensation can be higher or lower for the same valve opening percentage, but in the opposite direction, so the flow oscillations during the process should reduce. We present a discussion about the performance of the compensation based on the acquired results.