A Simple Extension of Ziegler-Nichols´ Method Based on Damped Oscillations

This paper proposes a simple extension of the well-known Ziegler-Nichols’ (ZN) method. As in the standard ZN method, the experiment may be performed using the controller only, without any extra equipment. But, in opposite to the ZN method, the experiment may be performed using damped oscillations. Also, the proposed method allows more complex models of the plant, so a better tuning may be obtained.