Ratio control system ppt

  • What is a ratio control system?

    Ratio control is a special type of feedforward control that has. had widespread application in the process industries.
    The. objective is to maintain the ratio of two process variables as a. specified value..

  • What is cascade ratio control?

    Cascade control is often used in complex processes where a high degree of accuracy is required.
    Ratio control: Ratio control is a method of controlling two process variables in proportion to each other..

  • Flow Ratio Controllers
    Widely used in a variety of flow splitting applications such as etching, stripping, and PECVD, the DELTA™ Flow Ratio Controller (FRC) provides users with the ability to distribute gas or gas mixtures to different zones in a process chamber.
  • Ratio control blenders are suitable for any liquid hydrocarbon blending application where the quality of the feedstock is consistent and known.
    The final blended product is produced to an extremely accurate component ratio determined by the flow meters, the efficiency and linearization of the control system.

What is the difference between a cascade and a ratio control system?

In a cascade system, the output of one controller becomes the setpoint for another

Here in a ratio control system, the process variable of one controller becomes the setpoint for another, such that two process variables remain in constant proportion (ratio) to one another


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