| 摘要 |
A process controller (100) controls an integrating type process (112) based on a measured process variable (y(t)) and a set point (Y SET). The process controller (100) includes an error generating circuit (102) , a non-integrating control circuit (104) and an adaptive bias circuit (108). The error generating circuit (102) generates an error signal (e(t )) based on a difference between the set point (Y SET) and the measured process variable (y(t)). The control circuit (104) generates a control signal (u(t)) as a function of the error signal (e(t)). The adaptive bias circuit (108) adds a bias value to the control signal (u(t)), the measured process variable (y(t)) or the set point (Y SET). The bias value is selectively updated as a function of the error signal (e(t)) to fo rce the error signal (e(t)) toward zero.
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