Chapter 12. Ratio, Selective, and Split-Range Control

After reading this chapter the reader should be able to understand and develop ratio, selective and override control, and split-range control strategies. Ratio control is similar to feed-forward control, while selective and override control choose between alternative outputs or inputs. Split-range control chooses between two or more control valves to implement a manipulated input.

The major sections of this chapter are as follows:

12.1 Motivation

12.2 Ratio Control

12.3 Selective and Override Control

12.4 Split-Range Control

12.5 SIMULINK Functions

12.6 Summary