What Are Pid In Performance Auto Tuning

The best means of tuning a proportional-integral-derivative (PID) loop to achieve optimal performance is still an open question. In practice, loop tuning is more of an art than a science. The most basic autotuners automate the manual tuning procedures an operator might otherwise perform when commissioning a.

To achieve the best level of process control it is necessary to tune PID controllers, this can be done in a number of ways.

Manual PID Tuning

What Are Pid In Performance Auto Tuning Tools

Controllers will enable manual PID tuning meaning the P, I and D variables must be manually calculated by the engineer and set using the controller menu. This requires a reasonable level of knowledge and understanding from the user to be able to carry out the calculation. Often manual PID tuning will still require some trial and error testing to achieve peak efficiency. Manual tuning can be extremely time consuming compared to the alternatives.

PID Auto-Tuning

Most modern PID process controllers will support auto-tuning (also known as self-tuning) of the PID settings. Typically the way this works will depend on which manufacturer’s product you are using, but commonly they use a rule based calculation in the same way that an experienced engineer tuning the device manually would. Auto-tuning can either take place at the set-point or with some controllers it occurs as the load is being heated up from the ambient temperature.

Typical PID Tuning at Setpoint


Pid Auto Tuning Algorithm

More recently, controllers have introduced a number of options for auto-tuning PID settings. These allow the settings to be more closely aligned to a specific application’s requirements for example prioritising the minimisation of overshoot over the time it takes to reach the set-point.

Users are advised to refer to their manufacturer’s technical support if they have specific application requirements which they are unsure of.

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What Are Pid In Performance Auto Tuning

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