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Tuning Methods Based on Known Process Models

The principal Umitation to using these rules is that the true process parameters are often unknown. Steady-state gain K can be calculated from a process model, or determined from the steady-state results of a step test as Ac/Au, as shown in Fig. 8-28. The test will not be viable, however if the time constant of the process x is longer than a few minutes, since five time constants must elapse to approach a steady state within 1 percent, and unexpected disturbances may intervene. Estimated dead time 0 is the time from the step to the intercept of a [Pg.18]

TABLE 8-3 Tuning Rules Using Slope and Intercept [Pg.19]

8-28 If a steady state can be reached, gain K and time constant t can be estimated from a step response if not, use Xi instead. [Pg.18]


Tuning Methods Based on Known Process Models. 8-14... [Pg.715]


See other pages where Tuning Methods Based on Known Process Models is mentioned: [Pg.18]    [Pg.893]    [Pg.898]    [Pg.18]    [Pg.893]    [Pg.898]    [Pg.18]    [Pg.697]    [Pg.41]    [Pg.6433]    [Pg.6432]    [Pg.139]    [Pg.66]    [Pg.441]   


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