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Performance improvement of saturated system using loop shaping approach
Author(s) -
Yang ShyiKae,
Chen ChiehLi
Publication year - 2009
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.81
Subject(s) - control theory (sociology) , actuator , controller (irrigation) , loop (graph theory) , control engineering , control system , engineering , control (management) , computer science , mathematics , artificial intelligence , agronomy , electrical engineering , combinatorics , biology
Actuator saturation is an important issue when designing practical control systems. It usually induces the windup phenomenon and even yields system instability. In this paper, a two‐stage controller design method is proposed for systems with actuator limitations using the loop shaping approach. In this approach, a pre‐designed controller is first used to stabilize the control system to achieve the desired performance. A loop‐shaping‐based auxiliary controller is then introduced to reduce the windup effect, which might be caused by actuator limitation or functional damage during the mission. Copyright © 2009 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society