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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/7035
Title: Adaptive Critic Design Using Policy Iteration Technique for LTI Systems: A Comprehensive Performance Analysis
Authors: Prasad L.B.
Tyagi, Barjeev
Gupta H.O.
Published in: Journal of Control, Automation and Electrical Systems
Abstract: This paper presents adaptive critic design (ACD) using policy iteration technique for adaptive optimal control of continuous-time linear time-invariant (LTI) dynamical systems. A comprehensive performance analysis of control scheme is presented in this paper. ACD using online policy iteration technique provides an adaptive optimal control solution for an infinite horizon problem subject to the real-time dynamics of a continuous-time system. In general, ACD involves a critic and an actor, where the critic evaluates the performance of present control policy and generates a critic signal to update the control action for performance improvement, and the actor provides the control input to the system being controlled. Policy iteration technique which is based on actor–critic structure consists of two-step iteration: policy evaluation and policy improvement. In this paper, the application of control scheme is implemented for a practical example of LTI systems–load frequency control of power system. The modeling, simulation results, and analysis are presented for both of system models without and with integral control. The comparative performance investigation of adaptive critic control scheme and linear quadratic regulator is also presented. © 2015, Brazilian Society for Automatics--SBA.
Citation: Journal of Control, Automation and Electrical Systems (2015), 26(2): 134-148
URI: https://doi.org/10.1007/s40313-015-0167-5
http://repository.iitr.ac.in/handle/123456789/7035
Issue Date: 2015
Publisher: Springer New York LLC
Keywords: Actor–critic
Adaptive critic
Adaptive optimal control
Integral control
LFC
LTI system
Policy iteration
ISSN: 21953880
Author Scopus IDs: 54960247000
7005609418
24530497600
Author Affiliations: Prasad, L.B., Department of Electrical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
Tyagi, B., Department of Electrical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
Gupta, H.O., Department of Electrical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, 247667, India
Corresponding Author: Prasad, L.B.; Department of Electrical Engineering, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [EE]

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