32 research outputs found
Tuning of Constant in gain Lead in phase (CgLp) Reset Controller using higher-order sinusoidal input describing function (HOSIDF)
Due to development of technology, linear controllers cannot satisfy
requirements of high-tech industry. One solution is using nonlinear controllers
such as reset elements to overcome this big barrier. In literature, the
Constant in gain Lead in phase (CgLp) compensator is a novel reset element
developed to overcome the inherent linear controller limitations. However, a
tuning guideline for these controllers has not been proposed so far. In this
paper, a recently developed method named higher-order sinusoidal input
describing function (HOSIDF), which gives deeper insight into the frequency
behaviour of non-linear controllers compared to sinusoidal input describing
function (DF), is used to obtain a straight-forward tuning method for CgLp
compensators. In this respect, comparative analyses on tracking performance of
these compensators are carried out. Based on these analyses, tuning guidelines
for CgLp compensators are developed and validated on a high-tech precision
positioning stage. The results show the effectiveness of the developed tuning
method