DocumentCode :
894
Title :
On the Mixed 
Loop-Shaping Tradeoffs in Fractional-Order Control of the AVR System
Author :
Das, S. ; Pan, Indranil
Author_Institution :
Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton, UK
Volume :
10
Issue :
4
fYear :
2014
fDate :
Nov. 2014
Firstpage :
1982
Lastpage :
1991
Abstract :
This paper looks at frequency domain design of a fractional-order (FO) proportional-integral differential (PID) controller for an automatic voltage regulator (AVR) system. Various performance criteria of the AVR system are formulated as system norms and are then coupled with an evolutionary multiobjective optimization (MOO) algorithm to yield Pareto optimal design tradeoffs. The performance measures consist of mixed H2/H∞ design objectives, such as the set-point tracking, load disturbance, and noise rejection controller effort, which are an exhaustive set of conflicting control objectives. A fuzzy logic-based mechanism is used to identify the best compromise solution on the Pareto fronts. The advantages and disadvantages of using an FOPID controller over the conventional PID controller, which are popular for industrial use, are enunciated from the presented simulations. The relevance and impact of FO controller design from the perspective of the dynamics of AVR control loop is also discussed.
Keywords :
H∞ control; H2 control; Pareto optimisation; evolutionary computation; frequency-domain synthesis; fuzzy control; three-term control; voltage control; voltage regulators; AVR control loop; AVR system; FO PID controller; FO controller design; FOPID controller; H2/H∞ design objective; MOO algorithm; Pareto front; Pareto optimal design tradeoff; automatic voltage regulator system; control objective; conventional PID controller; evolutionary multiobjective optimization algorithm; fractional-order control; fractional-order proportional-integral differential controller; frequency domain design; fuzzy logic-based mechanism; load disturbance; mixed H2/H∞ loop-shaping tradeoff; noise rejection controller effort; performance criteria; set-point tracking; Fractional calculus; Frequency-domain analysis; Optimization; PD control; Sensitivity; Transfer functions; Voltage control; Automatic voltage regulator (AVR); fractional-order (FO) proportional-integral differential (PID) controller; frequency domain design tradeoffs; multiobjective optimization (MOO);
fLanguage :
English
Journal_Title :
Industrial Informatics, IEEE Transactions on
Publisher :
ieee
ISSN :
1551-3203
Type :
jour
DOI :
10.1109/TII.2014.2322812
Filename :
6813659
Link To Document :
