Volume 12, Issue 3 (2012)                   MJEE 2012, 12(3): 32-38 | Back to browse issues page

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Hashemipour S H, Vasegh N, Khaki Sedigh A. Decentralized MRAC for Large Scale Systems with Input and State Delays. MJEE 2012; 12 (3) :32-38
URL: http://mjee.modares.ac.ir/article-17-7025-en.html
Decentralized MRAC for Large Scale Systems with Input and State Delays
Syed Hamid Hashemipour1 , Nastrn Vasegh 2, Ali Khaki Sedigh3
1- Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2- Department of Electrical Engineering, ShahidRajaee Teacher Training University, Tehran, Iran. ,
3- Department of Electrical Engineering, Khaje Nasir Toosi University of Technology, Tehran, Iran.
Abstract:   (4762 Views)
In this paper, the problem of decentralized model reference adaptive control (MRAC) for a class of large scale systems with time varying delay in interconnected term and input and state delays is studied. To compensate the effect of input delay indirectly, a Smith predictor built on. To handle the effects of the time delays in input, the adaptive controller part includes two auxiliary dynamic filters with time varying gains. Under a usual assumption that the interconnections are assumed to be Lipschitz in its variables and uniformly in time with unknown Lipschitz gains, the difficulties from unknown interconnections are dealt. A generalized error is defined and by a suitable Lyapunov function, an adaptive controller is designed to stabilize it. Decentralized adaptive feedback controller can render the generalized error system uniformly ultimately bounded stable is designed. Finally, a numerical example is given to demonstrate the feasibility and effectiveness of the proposed design techniques. 
 



 
Keywords: Input delays, Time varying delay, decentralized MRAC, interconnected system
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Received: 2015/09/16 | Accepted: 2015/11/22 | Published: 2015/11/22
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