Optimal PID settings found in record time
An
ACT: Hans Eder product story
Edited by the Engineeringtalk editorial team
Jul 19, 2005
Topas is a novel PID tuning tool capable of using more than 20 tuning methods, evaluating them specifically for the given situation and selecting the best results.
Many methods for calculating PID tuning parameters exist, but most only work well in a certain range.
Now Topas eliminates this shortcoming: it uses over 20 methods, evaluates them specifically for the given situation and selects the best results.
Besides proprietary methods, highly recognised formulas like Astrom, Cohen-Coon, Chien-Hrones-Reswick, IMC, itAE etc have been included, some adapted.
Tuning is calculated specifically for setpoint changes or load upsets, and users can opt for best performance, smoothest control action or minimum consumption of the resource.
For the three best results the loop behaviour is presented graphically.
Further testing and quick refining such as for the effect of noise, sticking valves, process nonlinearity or changes in the dynamics can be carried out with the integrated simulation environment.
The process behaviour can be represented by a first or second order plus deadtime or an integrator plus deadtime model.
For easy and fast estimation of the process parameters Topas provides several methods, from a step or relay test or operating data, even from a closed loop test (no oscillation required).
Furthermore, general formulas for integrating processes have been added to the ones for tight and average (error squared) liquid level control.
In line with ACT's overall motto "top results in shortest time", these capabilities allow to find swiftly the optimal PID settings for the given situation, which makes Topas probably the best PID tuning tool on the market.
Yet, despite its many features it costs less than most tuning packages.
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