Patent
Method and an apparatus for PID controller tuning
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TLDR
In this article, a method for tuning P-, I-and D-type controller which is used in combination or individually to control a variable y of a process in a feedback system, which comprises making the integrating (I) and derivative (D) unit of the controller inoperative, increasing the proportional control gain K until a desired oscillation is obtained, calculating the ultimate gain Ku and ultimate period Tu in accordance with the amplitude and period measured from the oscillation, and setting the parameters of the PID controller in dependence upon the Ku and Tu values, wherein the control signal U resulting fromAbstract:
A method for tuning P-, I- and D-type controller which is used in combination or individually to control a variable y of a process in a feedback system, which comprises making the integrating (I) and derivative (D) unit of the controller inoperative; increasing the proportional control gain K until a desired oscillation is obtained; calculating the ultimate gain Ku and ultimate period Tu in accordance with the amplitude and period measured from the oscillation; and setting the parameters of the PID controller in dependence upon the Ku and Tu values, wherein the control signal U resulting from the controller gain K is restricted to a range from a lower limit Umin to an upper limit Umax to avoid the system being operated in an unstable condition. An apparatus suitable for performing the present method is also disclosed.read more
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References
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