Isomorphism-based robust right coprime factorisation of non-linear unstable plants with perturbations

This study is concerned with the robust right coprime factorisation of non-linear plants based on the isomorphism approach. First, the factorisation of the non-linear plant is realised by using the isomorphism approach where the Bezout identity is simply satisfied with the obtained factors. Moreover, the stability of the non-linear feedback system and the output tracking to the reference input are studied. The effectiveness of the proposed method is demonstrated by the simulations.