Open AccessRobust closed loop reference MRAC with PI compensator
Author(s) -
Dey Rajiv,
Jain Sachin K.,
Padhy Prabin K.
Publication year - 2016
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2016.0430
Subject(s) - control theory (sociology) , robustness (evolution) , reference model , transient response , pid controller , computer science , adaptive control , closed loop , control engineering , engineering , control (management) , temperature control , artificial intelligence , biochemistry , chemistry , software engineering , electrical engineering , gene
Adaptive controllers with closed loop reference models have guaranteed transient performance due to the additional design freedom available in them. However, robustness in the presence of both matched perturbations and time delay is not guaranteed, which is a necessary requirement for most of the safety‐critical systems, such as, aerospace applications. This study attempts to achieve guaranteed transient and steady state performance with improved robustness in the presence of both matched perturbations and input delay by incorporating a proportional–integral (PI) compensator in the feedback loop of the closed loop reference model reference adaptive control (MRAC) architecture. The proposed system also reduces high frequency oscillations in control channel without disturbing the relative order of plant. The parameters of PI compensator have been tuned using genetic algorithm. Effectiveness of the proposed work has been validated on standard numerical examples using simulation results and the performance has been compared with similar and recent works.