Cohen-Coon Tuning Method

Process Reaction Curve Method (Cohen-Coon Tuning). For some processes, it may be difficult or hazardous to operate with continuous cycling, even for short periods. The process reaction curve method obtains settings based on the open loop response and thereby avoids the potential problem of closed loop instability. The procedure is as follows ... 

In this section we discuss the most popular of the empirical tuning methods, known as the process reaction curve method, developed by Cohen and Coon. 

Example 18.4 Controller Tuning by the Ziegler-Nichols and Cohen-Coon Methods... 

The most well-known tuning guidelines that make use of these concepts are the Ziegler Nichols method and the Cohen-Coon method. There are also other controller tuning guidelines, such as dead-beat tuning and Internal Model Control tuning. It is beyond the scope of this chapter to discuss the last two methods. 

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